f223 service manual
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F 223 SERVICE MANUAL
SERVICE MANUAL
Fax Model
F 223
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F 223 SERVICE MANUAL
C O N T E N T SC O N T E N T S ............................................................................................................................. 1-2
1. PRECAUTIONS............................................................................................................................ 1-51.1. IMPORTANT SAFETY INFORMATION...................................................................................1-5
1.2. CAUTION FOR THE USED LITHIUM BATTERY ..................................................................1-51.3. CONFIGURATION................................................................................................................... 1-6
1.3.1. The content of package.........................................................................................................................................................1-6
1.3.2. Connections ............................................................................................................................................................................1-7
1.3.3. Loading the recording paper roll .......................................................................................................................................1-8
1.3.4. Overview of the operation panel. .......................................................................................................................................1-9
1.4. MAINTENANCE.....................................................................................................................1-11
1.4.1. Clearing jammed recording paper ...................................................................................................................................1-111.4.2. Clearing document jams ....................................................................................................................................................1-11
2. MECHANICS .................................................................................................................................2-1
2.1. PERSPECTIVE VIEW.............................................................................................................. 2-1
2.1.1. Outside view ...........................................................................................................................................................................2-1
2.1.2. Right perspective view ..........................................................................................................................................................2-2
2.1.3. Left perspective view ............................................................................................................................................................2-3
2.1.4. Top perspective view.............................................................................................................................................................2-4
2.2. OUTLINE OF MECHANISM .................................................................................................... 2-5
2.2.1. Transmission mechanism .....................................................................................................................................................2-5
2.2.2. Receiving mechanism ...........................................................................................................................................................2-6
2.2.3. Automatic document feeder .................................................................................................................................................2-7
2.3.
DISASSEMBLING OF MAIN PARTS...................................................................................... 2-82.3.1. Disassembling of the mechanism assy .............................................................................................................................2-8
2.3.2. Disassembling of the cover top assy.................................................................................................................................2-9
2 3 3 Disassembling of the operation panel assy 2-10
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3.2.1. Power on and system reset ..................................................................................................................................................3-2
3.2.2. Memory ...................................................................................................................................................................................3-2
3.2.3. Setting the Paper ...................................................................................................................................................................3-3
3.2.4. Setting the Document............................................................................................................................................................3-3
3.2.5. Scanning Keys & LCD indicator..........................................................................................................................................3-3
3.2.6. Scanning the Document ........................................................................................................................................................3-3
3.2.7. Printing ...................................................................................................................................................................................3-3
3.2.8. Transmission..........................................................................................................................................................................3-4
3.2.9. Reception ................................................................................................................................................................................3-4
3.2.10. Memory Back-Up...................................................................................................................................................................3-4
3.2.11. LSR Relay(MAIN B/D -K1) ...................................................................................................................................................3-4
3.2.12. Line Transformer (MAIN B/D-T1) .....................................................................................................................................3-4
3.2.13. Ringing Detection (MAIN B/D -U16) .................................................................................................................................3-4
3.2.14. Volume Control ......................................................................................................................................................................3-4
3.2.15. DP Dialing( Setting the DP mode) ......................................................................................................................................3-4
3.2.16. DTMF Dialing(Setting the DTMF mode).........................................................................................................................3-5
3.2.17. Transmitting a voice .............................................................................................................................................................3-53.2.18. Receiving a voice ...................................................................................................................................................................3-5
3.2.19. Hook detection .......................................................................................................................................................................3-5
3.3. POWER SUPPLY................................................................................................................... 3-7
3.3.1. Description .............................................................................................................................................................................3-7
3.3.2. Operation Principle for Each Circuit................................................................................................................................3-7
3.3.3. Input Cir cuit ...........................................................................................................................................................................3-7
3.3.4. EMI Filter Circuit .................................................................................................................................................................3-7
3.3.5. Input Rectifier and Smoothing Circuit. ..............................................................................................................................3-7
3.3.6. Transformer and Snubber Circuit .......................................................................................................................................3-7
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5.1. GENERAL ..................................................................................................................................5-15.2. TROUBLES SHOOTING & DIAGNOSIS THE SET ..........................................................................5-2
5.2.1. No operating at all. ................................................................................................................ 5-2
5.2.2. The machine does not transmit documents correctly. ............................................................ 5-2
5.2.3. The machine does not receive documents correctly. .............................................................. 5-25.2.4. Copies cannot be made when the START / COPY is pressed................................................. 5-3
5.2.5. The machine doesnt come out papers correctly. ................................................................... 5-3
5.2.6. Telephone doesnt operate when power turn off.................................................................... 5-3
5.3. TROUBLESHOOTING& DIAGNOSIS THE BOARD........................................................................ 5-4
5.3.1. MAIN board troubleshooting & diagnosis............................................................................. 5-4
5.3.2. OP Board Troubleshooting & diagnosis ................................................................................ 5-7
5.3.3. Power Supply Board Troubleshooting & diagnosis............................................................... 5-8
6. PART LIST.....................................................................................................................................6-16.1. MECHANICAL PARTLIST........................................................................................................... 6-1
7. CIRCUIT DIAGRAM ..................................................................................................................... 7-47.1. BLOCK DIAGRAM....................................................................................................................... 7-47.2. CONNECTION DIAGRAM ............................................................................................................. 7-57.3. MAIN BOARD DIAGRAM ............................................................................................................. 7-6
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1. PRECAUTIONS
1.1. Important safety information
To protect yourself and your fax machine against electrical shock, fire, power surges and any other risks, follow all instructions
and cautions.
1. Never install the fax machine in the following places:
-. Places exposed to direct sunlight
-. Moist, hot or dusty places
-. Unstable or vibrating places
-. Near water-. Near flammable liquid or gas.
-. Near large appliances such as air conditioners and refrigerators
-. Near electric apparatus such as radios and TV sets
-. Near magnetic bodies such as audio speakers
2. The environmental requirements for operation are as follows
-. Temperature: 5 ~ 35C
-. Humidity: 15 ~ 85%
3. Use a separate, grounded outlet at the specified voltage .
4. Never install or use the fax machine during a lightning storm.
5. Never block or cover slots and openings on the fax machine provided for ventilation.
6. Never use liquid or aerosol cleaners for cleaning.
7. Never disassemble or modify your fax machine.
8. Never open the cover of the fax machine during operation.
9. Never drop small pieces of metal on your fax machine.
10. Never pull on the power cord or place anything on the power cord.
11. Never pull the power plug out with wet hands.
12. To move the fax machine, disconnect the telephone line first, and then pull the power plug.
13. In case of malfunction, immediately turn off the fax machine, pull the plug, and call the Service Center.
Note:
Rapid temperature changes result in condensation forming on internal components. This may reduce printed image quality
or cause a malfunction. In this case, do not use the fax machine until the condensation has evaporated.
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1.3. Configuration1.3.1. The content of package
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1.3.2. Connections
Refer to the connection diagram as shown in the following illustration.
1. Connecting the power cordCheck the voltage of the power source as described on the label before connecting the power cord. Plug the
power cord into a grounded AC power outlet. This 3-prong power outlet is a safety feature to prevent fire or
electrical shock risks.
2. Connecting the handset
Connect one end of the curled cord to the handset and the other end to the jack on the left side of the fax
machine.
3. Connecting the line cord
Connect one end of the telephone line cord to a wall jack and the other end to the jack labeled LINE on the
backside of the fax machine.
4. Connecting an external TAM
To use an external TAM (Telephone Answering Machine) on the same telephone line with your fax machine,
connect it to the jack labeled TAD on the backside of the fax machine. To make the external TAM answerall incoming calls, change TAM ring count on your fax machine and select TAM mode.
(Refer to 9.8 Setting the number of rings for TAM MODE)
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1.3.3. Loading the recording paper roll
When you install the recording paper, turn the power off to prevent the shock of electric discharge.
1. Pull button as shown a nd open
The operation panel.
2. Remove package of new recording paper.
Adjust the recording paper as shown at right.
And then, place the recording paper roll into the
compartment.
3. Pull button as s hown and close
the operation panel.
4. Cut the recording paper
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1.3.4. Overview of the operation panel.
LCD: Displays various messages during operation and programming.
NUMERIC KEYS (0 ~ 9, *, #): Dials a phone/fax number directly.
Enter numbers or characters for registration.
ONE-TOUCH (01 ~05): Dials registered phone or fax number
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1.4. Maintenance
1.4.1. Clearing jammed recording paper
Follow instructions to clear the jammed recording paper.
1. Open the operation panel pulling the open button on the right side
2. Remove the jammed recording paper from the compartment.
3. Reinstall the recording paper (refer to the 1.4 Loading the recording paper roll).
1.4.2. Clearing document jams
1. Open the operation panel by pulling the open button on the right side
2. Remove the jammed documents.
3. Press stably on both sides of the operation panel to close it.
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2. MECHANICS
2.1. Perspective view2.1.1. Outside view
KEYTOP STOP
KEYTOP START
KEYTOP ONHOOK
KEYTOP TEN COVER BOTTOM
KNOB OPEN
PANEL OP
LCD
KEYTOP MENU(L)
KEYTOP OTC
KEYTOP VOLUME
GUIDE DOC(L)
HANDSET
KEYTOP ALPHA
KEYTOP REDIAL
TRAY DOC
COVER TOP
GUIDE DOC(R)
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2.1.2. Right perspective view
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2.1.3. Left perspective view
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2.1.4. Top perspective view
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2.2. Outline of mechanism
2.2.1. Transmission mechanism
DOCUMENTIN
DOCUMENTOUT
DOCUMENTIN
DOCUMENTOUT
DOCUMENTIN
DOCUMENTOUT
DOCUMENTIN
DOCUMENTOUT
DOCUMENTIN
DOCUMENTOUT
DOCUMENTIN
DOCUMENTOUT
DOCUMENTIN
DOCUMENTOUT
DOCUMENTIN
DOCUMENTOUT
DOCUMENTIN
DOCUMENTOUT
DOCUMENTIN
DOCUMENTOUT
DOCUMENTIN
DOCUMENTOUT
DOCUMENTIN
DOCUMENTOUT
DOCUMENTIN
DOCUMENTOUT
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2.2.2. Receiving mechanism
As shown in Figure 2-2, the receiving unit is composed of TPH, Roller TPH, Driving Gears, Stepping Motor, PDS (Paper
Detect Sensor and so on.As the stepping motor turns on, paper roll moved the location between Roller TPH and TPH.
TPH transforms electric signals to thermal energy. And t he paper roll is printed
When the record is finished, the paper roll moved at the manual cutting part of the top panel.
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2.2.3. Automatic document feeder
As shown in Figure 2-3, the automatic document feeder is composed of the SPG PLT ADF, Rubber PAD ADF, Holder ADF,SPG ADF, BKT ADF.
Figure 2-3
The automatic document feeder transmits the pages one by one even though several sheets of the document are set.
Detected by DDS, the documents inserted are fed to the Rubber ADF one by one from the very bottom with rotation
Of Roller ADF.
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2.3. Disassembling of main parts
? Caution
- When disassembling or reassembling, be sure to unplug the power cord.
- When disassembling, remove the TEL line cable & Handset cord.
- Be sure to use screwdrivers suitable for the respective screws.
- Do not use damaged parts or screws.
- The use of damaged parts or screws may result in malfunction or failure of the machine.
- When disassembling or reassembling. Dont touch the boards.
Static electricity can damage parts.
2.3.1. Disassembling of the mechanism assy
1) Turn over the set and remove 2 screws securing the BKT BASE.
2) Disconnect all connectors connected to Main board, and remove all screws securing the board (Main: 4screws,
SMPS: 4screws). And then remove the board from the frame main ass y.
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2.3.2. Disassembling of the cover top assy
1) Disassembling the basic mechanism ASS'Y. (see 2. 3.1)
2) Remove 2 screws securing the cover bottom.
3) Disassembling cover top assy from cover bottom assy.
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2.3.3. Disassembling of the operation panel assy
1) Disassembling cover top assy.(See 2.3.2.)
2) Open the operation panel and then remove the 2 screws.
3) Disconnect a connector connected to operation panel board.4) Put operation panel on a clean and flat place, otherwise the operation panel can be damaged.
5) Remove 12 screws securing the operation panel board.
6) Disconnect the LCD module connector connected to operation panel board.
7) Remove operation panel board and LCD module from operation panel.
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2.3.4. Disassembling of the frame op assy
1) Disassembling the mechanism assy (See 2.3.1.)
2) Disassembling the cover top ASSY. (See 2.3.2.)
3) Remove 2 screws securing the cover bottom assy.
4) Disassembling cover top assy from cover bottom assy.
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2.3.5. Disassembling of the handset assy
1) Disconnect the Modular Jack of Curl Cord connected to the Phone Handset.2) The Handset is composed of a Handset Upper and a Handset Lower.
To separate them, remove a screw from the middle of the Handset Lower.
3) Press the middle of the Handset Upper slightly and pull it out from the Handset Lower
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2.4. How to replace main parts
2.4.1. How To Replace Thermal Print Head
1) Unplug the power cord.
2) Disassembling the basic mechanism ASS'Y. (See 2.3.1)
3) Disassembling the cover top ASSY. (See 2.3.2)
4) Disassembling the frame op ASSY. (See 2.3.4)
5) Remove 2 screws securing the frame op assy.
6) Disassembling the BKT TPH cover.
7) Apart TPH AS from BKT Receive in pull TPH while pressing it.
8) Disconnect 2 connectors connected to the TPH.
9) Remove 4 screws securing the BKT TPH (R)/(L).
10) Replace the new TPH.11) Check the copy condition.
* Check and see right -and-left of the connector when you insert the connector to the new TPH.
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2.4.2. How to replace CIS
1) Unplug the power cord.2) Disassembling the basic mechanism ASS'Y. (See 2.3.1)
3) Disassembling the cover top ASSY. (See 2.3.2)4) Open the operation panel.
5) Remove 2 screws securing the cover bottom.
6) Disassembling the motor assy.7) Disassembling the CIS assy from cover bottom.
8) Disconnect connectors connected to the CIS.9) Remove 4 screws securing the holder CIS.10) Replace the new CIS.11) Check the copy condition.
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2.4.3. How to replace roller TPH
1) Unplug the power cord.2) Disassembling the basic mechanism ASS'Y. (See 2.3.1)
3) Disassembling the cover top ASSY. (See 2.3.2)4) Open the operation panel.
5) Disassembling the roller TPH from cover bottom.6) Replace the new roller TPH.
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2.4.4. How to replace roller CIS
1) Unplug the power cord.2) Disassembling the basic mechanism ASS'Y. (See 2.3.1)
3) Disassembling the cover top ASSY. (See 2.3.2)4) Disassembling the frame op ASSY. (See 2.3.4)
5) Remove e-ring securing the roller CIS.6) Replace the new roller CIS.
Figure 2-11
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2.4.5. How to replace roller ADF
1) Unplug the power cord.
2) Disassembling the basic mechanism ASS'Y. (See 2.3.1)
3) Disassembling the cover top ASS'Y. (see 2.3.2)
4) Open the operation panel.
5) Remove 2 screws securing the cover bottom.
6) Disassembling the motor assy.
7) Remove the bush clutch ASF, gear ASF and bush ASF from roller ADF.
8) Disassembling the roller ADF.
9) Replace the new roller ADF.
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2.5. How to repair mechanism
When there are any problems in the mechanics, identify the symptom and check the following chart.
Symptom Cause Action1. Not close operation panel completely. - Close the operation panel completely.2. DDS does not detect document. - Check whether DDS Lever is bent
3. Deformation or stain of Spring PLT ADF. - Check the sensor operation.
4. Abrasion of Rubber ADF. (When pressing the DDS Lever, Roller ADF turns on.)
- Exchange the SPG PLT ADF.
1. Not operate when a
document is inserted.
- Exchange the Rubber pad ADF.
1. Roller ADF is stained. - Clean the Roller ADF with alcohol.
2. Deformation or stain of spring PLT ADF. - Exchange the SPG PLT ADF.2. Stepping motor revolves
but document is not inserted.3. Abrasion of Rubber ADF. - Exchange the Rubber ADF.
1. Roller ADF and Rubber ADF are dirty. - Clean the Roller ADF and Rubber ADF with alcohol
and a soft cloth.
2. Deformation of Spring PLT ADF. - Exchange the SPG PLT ADF.
3. Document are not inserted
one by one.
3. Abrasion of Rubber ADF. - Exchange the Rubber ADF.
1. CIS glass is dirty. - Clean the CIS glass
2. There is a chemical dregon TPH. - Clean the Roller CIS.
- Clean the TPH.4. Vertical black line.
- Exchange the TPH.
1. TPH is stained. - Clean the thermal head.
2. TPH is broken. - Exchange the TPH.5. Printed with missing a letter.
3. Friction torque of Damper gear unit isInsufficient. - Align again after checking alignment of TPH
1. Out of order PDS (Paper Detection
Sensor)
- Exchange the PDS.6. Non feeding of recording paper
or not inserted one by one.
2. Receive cover is not closed completely. - Close the Receiver Cover firmly.
7. Poor printing quality 1. TPH connector is not connected. - Check TPH connector.- Non printing on recording paper 2. Receive Cover is not closed firmly. - Close Receive Cover firmly.
- Printing too lightly partly. 3. TPH and BKT TPH do not set correctly. - Align again after check alignment of TPH.
- Printing too lightly entirely. 4. TPH pressure is uneven. - Exchange the new SPG TPH.
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2.6. Preventive maintenance
To continue efficient performance, check the following item.
2.6.1. Preventive Maintenance
1) Transmit Mechanical Part
- Clean the Roller CIS with alcohol on a soft cloth.
- Clean the CIS Glass with alcohol on a soft cloth.
- Clean the Sensor parts adhered to paper particles and dust with air cleaner.
2) Receive Mechanical Part
- Clean the Roller TPH with alcohol on a soft cloth.
- Clean TPH head with alcohol on a soft cloth.
- Clean the Sensor parts adhered to paper particles and dust with air cleaner.
3) An Article of Consumption
The approved products for the fax machine are as follows:
? Recording Paper Spec.
- Type : Thermal Paper
- Size
1. 210mm(W) 15,000mm(L)2. 210mm(W) 30,000mm(L)
- Thickness 0.057mm
2.6.2. Cleaning of Thermal Print Head
When this paper is used for a long time, the copy quality will deteriorate because the color former and paper particles have
adhered to head. When it happens, disassemblethe FAX and lightly clean the head with alcohol on a soft cloth.
Use only a soft cloth because the surface of the head is precisely coated and a rough cloth can cause damage to the head.
Never use benzene, thinner or water.
2.6.3. Cleaning of CIS Glass
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3. ELECTRICAL DESCRIPTION
3.1. Outline
SPEAKER
+24V : 1.2A
TONE & CID
BLOCK DIAGRAM
LCD 16 X 1
SMPS
RINGDETECTION
4
CID DETECTION
3
(Thermal Print Head)
-12V : 0.03A
RESET LOGIC
VIDEO & SCANNER PROCESSOR
(Document Position Sensor)
POWER SUPPLY
TPH
5
IAA(20415)
MODEM : 14.4Kbps
SLIDE B/D
SRAM
#
+3.3VCIRCUIT
INLET
32KB
LINESELETION
PDS
*
HOOK S/W
THERMAL PRINTER CONTROL
EEPROM
MOTOR
ADF
KEY MATRIX
PSTN
TAD
AC
128KB
TONE RINGER
(Scanner Control& VideoProcessing)
MICROPROCESSOR(MC24)CONTROL
MAIN
HANDSET
(Paper Detection Sensor)
HOOK B/D
6
DRIVER
POWER DOWN CXD9450INTERFACE
7
OP
2DDS
MODEM
+5V : 0.45A
VOLUME
SELECTION
TX MOTOR
SRAM BACK-UP
9
1
0
TRANSFORMER
8
(Document Detection Sensor)
LINEINTERFACE
PART
TEL/LINE
INTERFACE
RX MOTOR
TAD/EXT
REAL TIME MULTITASKING
DPS
H/S
(Automatic Document Feeder)
NETWORK
DIALERTONE/PULSE
CIS
Figure 3.1 Architecture of system
The Single-chip Fax Engine(CXD9450) provides design flexibility by virtue of its built-in peripheral functions (such as
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3.2. Main board
3.2.1. Power on and system reset
When the power cord is connected the set, the source(+5V,+24V, -12V) is supplied for each circuit from the main board.
The mRESET signal is generated by R2 and CE2 on the main board to reset I/O ports of the main board.
It goes to mRESET(MAIN B/D -U8-80 PIN) of main board which is FAX engine and then the RESET is maintained
that the output voltage is low level from U3.
After the ENGINE is initialized, ENGINE(MAIN B/D -U8) will check the status of SRAM before being idle.
If they have a wrong, the defaults of SRAM(MAIN B/D -U4) data write onto SRAM from CPU (MAIN B/D -U8-154
PIN).
Figure 3.2 SYSTEM RESET TIMING
3.2.2. Memory
. ROM(U 1)The ROM contains a 128 Kbytes programmable area.
It is capable of directly accessing of the addressing range from FE0000 to FFFFFF.
The ROM operates at the access time of 70 nsec without insertion of a wait cycle.
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3.2.3. Setting the Paper
The thermal paper is installed in the CONTROL-PANEL, PDS(Paper Detection Sensor) check the paper.
The PDS(MAIN B/D-U8-52PIN) signal is low-active.
3.2.4. Setting the Document
When a document is inserted to the document guide, the DDS(Document Detection Sensor) is detected to high level.
After the ENGINE(M1-U8-51 PIN ) detects the DD S signal, the output of ENGINE(M1-U8-53 PIN) is high level the
24V/ON signal and the 24V RELAY of POWER is on and then is supplied motor from main board.
TM[0..3](M1-U8-169, 168, 167, 166 PIN) that are driving motors will drive the TX motor in one- & two-phases.
The stepping motor pulls out a document to reading position precisely.
As soon as the document detect the DPS(Document Position Sensor), DPS signal(M1-U8-107 PIN) is to high level.
And then TM motor stop.
3.2.5.Scanning Keys & LCD indicatorT here are 28 keys composed of STOP, START/COPY, PHONE, etc. on op panel.
The ENGINE(MAIN B/D -U8) detects an address of keys through row(OPO[0..6]) and column(OPI[0..3]) in matrix.
The ENGINE input key matrix and process for each key mode or function.
Because this machine hold an data bus of OPO[0..6] in common, the data bus is capable of time division as the LCD
and KEY.
3.2.6. Scanning the DocumentWe use CIS (Contact Image Sensor) in order to scan a document in the machine.
When transmitting and copying a document, printing density makes the horizontal and vertical scanning.The horizontal scanning in FINE & PHOTO and STD(standard) is scanned in 8dots/mm. FINE mode is in 7.7 line/mm
and STD(standard) in 3.85line/mm in vertical too. To drive CIS, the CISON(MAIN B/D -U8-116 PIN) control signal
that is power of CISLED become to low level, i t turned the +24V(CI S) source on power supply unit .
After LED is on, CISTR (MAIN B/D -U8-118 PIN) and CISCLK(MAIN B/D U8-115 PIN) are supplied for CIS
and a analog data output is at CIS analog after scanned a line. After a line of data is scanned by CIS, the CISTR signal is
changed low to high and an image data output moves to the system. As soon as the CISTR signal is low to high,
a 1728 image data transfers into the processor with shifting bit by bit in serial.
A CIS image data that synchronized with CISCLK. ENGINE reads video data in each CISCLK time
and controls the transmission stepping motor in one- & two-phase driving methods when scanning a document.An reading video signals transfer into the VIN(MAIN B/D-U8-84 PIN).
3.2.7. Printing
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3.2.8. TransmissionAfter the ENGINE(MAIN B/D-U8) codes image data by M R/MH coding, is saved in SRAM(MAIN B/D-U4).
A coded image data that is saved SRAM(MAIN B/D -U4) transfer to IA(MAIN B/D -U7) by one byte at synchronizing
with PORI signal(MAIN B/D -U8-143 PIN).
The TXOUTP(MAIN B/D-U7-17 PIN ) signal with coded image data transmit TX Amp(MAIN B/D -U9).
To pass by filter the modulation signal, the real signals transmit through amplifier.
These signals through Matching Trans.(MAIN B/D-T1) transmit to the Tel. Line.
3.2.9. Reception
T his machine receives image data from Tel-line. Image data moves to IA(MAIN B/D -U7-9PIN) through the matching
trans.(MAIN B/D-T1) and analog switch (MAIN B/D -U10).
A coded image data that is moved through RX Amp (MAIN B/D -U11) and is transmitted IA(MAIN B/D -U7) in main
board.
The ENGINE(MAIN B/D -U8) through IA demodulated image data internally.This action is in 1 byte and resaved in SRAM (MAIN B/D-U4). A coded image data print in print method.
3.2.10. Memory Back-Up
When the power source(+3.3V) is below +2.9V, first RESET IC(MAIN B/D-U3) is turned to low level,
then SRAM(MAIN B/D-U4) is changed into memory retention mode.
That is to say, the power source is below +2.9V, the mRAMCS(MAIN B/D-U8-75PIN) that is used to chip selection pin
in a retention mode of the SRAM(MAIN B/D-U4) is set to low level.
At power down, the power of the SRAM(MAIN B/D -U4) is supplied from a back- up battery (MAIN B/D-BT1).
If the power of the battery is exhausted, a data on the SRAM(MAIN B/D-U4) is erasable easily.A service engineer should change the used battery.
3.2.11. LSR Relay(MAIN B/D-K1)
Switches the line from fax/Ext. telephone.
3.2.12. Line Transformer (MAIN B/D-T1)
Pass AC signal components to FAX and block DC signal components from the line.Match the impedance between the line and the system.
3.2.13. Ringing Detection (MAIN B/D-U16)
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3.2.16. DTMF Dialing(Setting the DTMF mode)
- POWER ON
First of all set the DTMF mode.
When you press a key, ENGINE(MAIN B/D -U8) detects the dial number in DTMF,
The DTMF output signal transfer from Matching Trans(MAIN B/D-T1) to line through IA(MAIN B/D-U7-17PIN).
- POWER OFF DIALER TONE generates a line because PHOTO COUPLER doesnt operate.
When you press a DIAL KEY, DIALER TONE IC outputs DTMF signal. This signal outputs through NETWORK IC.
3.2.17. Transmitting a voice
Voice signal from Handset is transferred to Network IC(MAIN B/D -U19). This signal is transferred to Tel. Line.
3.2.18. Receiving a voice
Voice signal received from Tel. Line is transferred to Network IC(MAIN B/D -U19).
3.2.19. Hook detection
If for calling phone lift the handset, the hook switch is operating(Off hook).
The engine(MAIN B/D-U8) is detected low signal the mHOOKD(MAIN B/D-U8-142PIN).
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3.3. POWER SUPPLY
3.3.1. Description
This is device is switching mode power supply that operates at the rating of AC 230V by the fixed frequency and
provides the output voltage of +24,+5,-12 to the system by the input voltage AC of 180~264V within the frequency
range of 47~63Hz. This power supply provides the power of normal 31.41W and peak 77.01W and protection
functions against fire and inflammation by operation of the protection circuit at the time of the short-circuit of the
load circuit and power sources.
3.3.2. Operation Principle for Each Circuit
- Input and EMI filter circuit
C1 LF2LF1F1
TNR1
R1
C2
C3
C4
LIVE
NEUTRAL
F/G
3.3.3. Input Circuit
This part is composed of Fuse, Varistor and Inlet in order to connect with AC Cord.
-Fuse(F1) protects it by open when the Power supply is abnormal.
-Varistor(TNR1) is a part of absorbing the surge voltage that flows in from AC input line.
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TH1BD1
C5
3.3.6. Transformer and Snubber CircuitThis part is consist of T1,C6,C7,R5,D1.
-Transformer(T1) transforms from the primary high voltage to the secondary low voltage through the insulation.
-Snubber Circuit is composed of C6,C7,R5,D1 and controls the surge voltage and current when this device generates
from switching.
R5C6
D1 (C7)
3.3.7. PWM & Main Switch
T1
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3.3.8. +5V Output Circuit
-D5 and C15 rectify and make smooth for AC power sources left behind from the primary.
-U4 as the static voltage IC provides the stable output of +5V.
-C16 is a capacitor for protecting the oscillation of U4.
3.3.9. -12V Output Circuit
-D7 and C12 rectify and make smooth for AC power sources left behind from the primary.
-U2 as the static voltage IC provides the stable output of -12V.
-C10 is a capacitor for protecting the oscillation of U2.
D5
D7
C21
IN OUT
GND
U4
C15 C16
C10C12
IN OUTGND
U2
C20
COM
-12V_30mA
+5_0.45A
3.3.10. +24V Output Circuit
-D6,C14 rectifies and makes smooth AC voltages left behind from the primary.
-R18,PC1,U3,R19,R15,R16,R17,R18 detects and compares the secondary voltage and transfer the signal to the primary.
-C11,R20 is for the phase correction.
-D9 is for the protect the spike at ON/OFF of Relay.
RL1
D9
R27C14
D6/A
+24V_1.2A
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4. S/W DESCRIPTION
4.1. Service options
- SERVICE OPTION IS COMPOSED OF 5 GROUPS, entering method is as follows: FUNCTION+REDIAL/P (3 Times, within 2 seconds)+7793
So, 0 SYSTEM INIT. is displayed on the LCD.
And thereafter, you can change parameter value.
- For example, if you want to change RECALL PAUSE TIME(3 min.) into RECALL PAUSE TIME(2 min.),
1st You have to enter service mode using upper method.
2nd Press 2 + START/COPY 2 REGULATION + 2. SELECT SVC : 01 appear respectively.
3rd Press 2 + 1 + START/COPY ( RECALL PAUSE TIME is SVC221 )
SVC NO 3 appears and you can current setting 3 .
Press 2 + START/COPY, and changing setting is finished.
4.1.1. Memory initial & list
1) ALL MEMORY INITIAL
- This function is SERVICE MODE GROUP >
Clears all data in S-RAM and set the default parameters in S-RAM .
2) PRINT OUT SERVICE PARAMETER LIST
- This function is SERVICE MODE GROUP >
This list shows the stored parameters in S-RAM of the unit.All parameters can be adjusted.
SERVICE PARAMETERS LIST
DATE/TIME : OCT/01 2001 00:35 NAME :
VERSION :
> SYSTEM INITIALIZE
> SERVICE PARAMETER LIST
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3) PRINT OUT SIGNAL LIST
- This list shows the contents of Protocol for last fax communication
SVC241 ------> 80 SVC242 ------> 11
SVC243 ------> 18 SVC244 ------> 44
SVC245 ------> 52 SVC246 ------> 21
SVC247 ------> 26 SVC248 ------> 21SVC249 ------> 26 SVC250 ------> 2
SVC251 ------> 50
> EXTENDED OPTION PARAMETERS
SVC301 ------> 5 SVC302 ---- --> 5
SVC303 ------> 0 SVC304 ---- --> 0
SVC305 ------> 1 SVC306 ---- --> 1
SVC307 ------> 1 SVC308 ---- --> 0
SVC309 ------> 0 SVC310 ---- --> 0SVC311 ------> 0 SVC312 ---- --> 0
> SPECIAL TEST MODES
SVC401 SVC402
SVC403 SVC404
SVC405 SVC406
SVC407 SVC408
SVC409 SVC410
SIGNAL LIST
DATE/TIME : OCT/01 2001 00:35 NAME :
VERSION :
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4.1.2. Parameters for REGULATION( GROUP > )
1) SVC201 : FAX SENDING LEVEL- Adjusts sending signal level for fax communication.
2) SVC207 : PULSE DIAL FORMAT(0:N, 1:N+1,2:10-N)
- Selects PULSE dial format for DP dialing.
3) SVC208, SVC209 : PULSE MAKE/BREAK TIME (unit msec)
- Adjusts PULSE MAKE/BREAK TIMEfor DP dialing.
4) SVC210 PULSE INTERDIGIT TIME(unit 100msec)- Adjusts PULSE INTER DIGIT TIME for DP d ialing.
5) SVC213, SVC214 : DTMF SIGNAL ON/OFF TIME (unit msec)
- Adjusts DTMF SIGNAL ON/OFF TIME for TONE dialing.
6) SVC215, SVC216 : DTMF HIGH/LOW GROUP LEVEL
- Adjusts DTMF HIGH/LOW GROUP LEVEL for TONE dialing.
7) SVC217 : FLASH RECALL TI ME(unit 10msec)
- Adjust FLASH RECALL TIME depending on the exchange
8) SVC218 : 1st DIGIT DELAY TIME (unit 100msec)
- Adjusts FIRST DIGIT DELAY TIME for dialing.
9) SVC219 : PAUSE TIME (unit 100msec)- Adjusts PAUSE TIME between dial digits.
In automatic dialing, if the fax machine encountered the pause character (not first pause character),
dialing is delayed by this interval .
10) SVC220 : RECALL COUNT
- Adjust RECALL COUNT in automatic fax transmission.
11) SVC221 RECALL PAUSE TIME ( it 1 i )
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4) SVC305 : CALLER ID TYPE
- You can set the caller ID type (BELLCORE/V.23/DTMF-A/DTMF-B).
NOTE: This option is adjusted according to regulations of each country.
5) SVC307 : PHOTO SHADING CORRETION ON/OFF- Selects whether adjust shading (1) or not(0), when scan document in the photo mode.
4.1.4. SPECIAL TEST MODES ( GROUP > )
1) SVC402 : SENSOR TEST
- Tests Document sensor/Paper sensor.
2) SVC403 : TPH PRINT TEST
- Tests TPH(Thermal Print Head) component .
3) SVC404 : MOTOR TEST
- Tests Tx & Rx motor.
4) SVC405 : 0 dBm 2100Hz TX TEST
- Sends 2100Hz -0dBm signal to adjust 0 dBm in H/W level.
5) SVC406 : DTMF TEST- Tests continuous Modem DTMF Tone transmission.
GROUP NO. ITEM RANGE(UNIT) DEFAULT
01 FAX SENDING LEVEL 0 ~ 15 (dBm) 9
02 MIN. RING FREQUENCY 13~70(Hz) 13
03 MAX. RING FREQUENCY 13 ~ 70 (Hz) 70
04 MIN. SIGNAL ON TIME 15, 20, 25, 90 (x 10ms) 20
05 MIN. SIGNAL OFF TIME 0 ~ 9 (x 100msec) 5
06 RING OVER TIME 00~99(sec) 7
07 PULSE DIAL FORMAT 0:N, 1= N=1, 2=10-N 0
08 PULSE MAKE TIME 00~99(ms) 33
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27 PSTN DIAL TONE FREQ
0.100Hz~550 Hz
1.300 Hz~550Hz
2.300~800Hz1
28 PSTN DT OVER TIME 00~99 (sec) 10
GROUP NO. ITEM RANGE(UNIT) DEFAULT
29
MIN. DT ON TIME
(CONTINUOUS MODE) 0 ~ 99 (x 100msec) 8
30MIN. DT ON TIME
(CADENCE MODE)0 ~ 99 (x 10msec) 90
31MAX. DT ON TIME
(CADENCE MODE)0 ~ 99 (x 10msec) 110
32MIN. DT OFF TIME
(CADENCE MODE)0 ~ 99 (x 10msec) 15
33MAX. DT OFF TIME
(CADEN CE MODE)0 ~ 99 (x 10msec) 35
34 CADENCE MODE CYCLES 0~9 335 PSTN MAX LOSS TIME 0 ~ 99 (x 10msec) 2
36 BUSY DETECT BEFORE 0.OFF, 1.ON 0
37 BUSY DETECT AFTER 0.OFF, 1.ON 1
38 1ST BUSY MIN. ON TIME 0 ~ 99 (x 10msec) 40
39 1ST BUSY MAX. ON TIME 0 ~ 99 (x 10msec) 80
40 1ST
BUSY MIN. OFF TIME 0 ~ 99 (x 10msec) 40
41 1ST
BUSY MAX. OFF TIME 0 ~ 99 (x 10msec) 80
42 2ND
BUSY MIN. ON TIME 0 ~ 99 (x 10msec) 11
43 2ND
BUSY MAX. ON TIME 0 ~ 99 (x 10msec) 1844 2
NDBUSY MIN. OFF TIME 0 ~ 99 (x 10msec) 44
45 2ND
BUSY MAX. OFF TIME 0 ~ 99 (x 10msec) 52
46 3RD
BUSY MIN. ON TIME 0 ~ 99 (x 10msec) 21
47 3RD
BUSY MAX. ON TIME 0 ~ 99 (x 10msec) 26
48 3RD
BUSY MIN. OFF TIME 0 ~ 99 (x 10msec) 21
49 3RD
BUSY MAX. OFF TIME 0 ~ 99 (x 10msec) 26
50 BUSY DETECTION CYCLES 0~9 2
51 SETTING THE T0 TIME 1~99 (x sec) 50
01 CIS SLICE LEVEL 0~9 502 PHOTO CIS SLICE LEVEL 0~9 5
03 MONITORING0.OFF, 1.ON,
2.ERROR0
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4.2. Error codes
1. Mechanical errors
Error Code Descriptions
#005 Document jam error during transmission
#007 Printing head over heated
#008 Paper out error
2. Transmission errors
3. Receiving errors
Error Code Descriptions
#152 Invalid command is received after fax machine goes to receiving mode
#153 Password does not match (Polling TX)
#154 No response from the remote party after fax machine goes to receiving mode
Error Code Descriptions
#102 No document in the document feeder after the fax goes to transmitting mode
#104 No send document because line condition is bad
#110 No response from the remote party after completion of data transmission
#114 Exceeding the transmission length of the one page (above 1m)
#115 Exceeding the transmission time of one page (over 8 min.)
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5. ELECTRICAL TROUBLE SHOOTING & DIAGNOSIS
5.1. General
Troubleshooting comprises 1. Troubles shooting & diagnosis the set and 2. Troubles shooting & diagnosis
the board .
If the machine fails to operate correctly, check items in the section 5.2 Troubles shooting & diagnosis the set .
If the trouble is not solved, check the items in the section 5.3 Troubles shooting & diagnosis the board.
Notes on Troubleshooting:
It is very important to understand a machines functions to fine out the cause of the malfunction when repairing any piece
of equipment. In addition, it is necessary to know the removal/replacement and check test procedure of machine.When repairing, observe the following precautions.
PCB(Printed Circuit Boards) must be handled with care.
If a person charged with static electricity touches a PCB, some of the circuit may be damaged.
Be sure to turn the power off when replacing any part of a machine.
After disassembling or replacing any parts, be sure to run a machine check and make any necessary adjustments.
Be careful not to lose any small parts, such to screws, washers, spring, etc.
A PCB should be wrapped in a conductive sheet whenever it is moved or left outside the machine.
Be careful not to short the battery on the PCB.
After trouble shooting, check whether there are no loose screws, washers, paper scraps, etc., left in the machine.Before disassembling or replacing parts, prepare an anti-static mat and appropriate tools.
This tools include : Screwdriver, small blade screwdriver and pliers
Initial Inspection
(1) Setting Environment
a. Use the correct voltage supply.b. The machine should be placed on a flat and stable surface.
c. The machine should be used within the following ambient conditions.
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5.2. Troubles shooting & diagnosis the set
5.2.1. No operating at all.
Check point SolutionsIs the power inserted correctly? Insert the plug correctly referring to the User Manual.
Is the voltage correct ly? Check the voltage by plugging another electrical
appliance into the socket.
Is the MAIN PCB-P101 connector of main board correct ly? Check the MAIN PCB-P101.
The MAIN PCB-P101,-P109 connector of main board insert
only the power cord.
Check the message of LCD(stand-by mode).
If the message of LCD is correct, contact P102,
The MAIN PCB-P103,-P104s connector to main board.And then the power cord insert.
Check the message of LCD(stand-by mode).
5.2.2. The machine does not transmit documents correctly.
- No transmission when the START / COPY is pressed.
Check point SolutionsAre the modular connectors connected correctly? Check the LINE modular connection referring to
the User Manual.Have you replaced the handset before pressing the
START/COPY?
Press the START/COPY before placing the handset back.
Is the setting document jam to the scan part? Re-insert the document in the document guide.
Is the MAIN B/D -P109 connector of main board correctly? Check the MAIN B/D-P109.
Is the MAIN B/D-P102 connector of main board correctly? Check the MAIN B/D-P102.
Is the MAIN B/D-U5 short of pin and pin? Check the MAIN B/D-U5.
Is the other partys facsimile(receiving side) compatible? Contact the other party and check.
- Document is loaded the document guide but not fed.Check point Solutions
Is the document size correct (within the range to be
transmitted)?
Check the document size referring to the User Manual.
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5.2.4. Copies cannot be made when the START / COPY is pressed.
Check point Solutions Is the document size correct (within the range)? Check the document size referring to the User Manual.
Are documents stapled or clipped? Try again after removing all paper clips or staples.
Is OUT OF PAPER displayed on the LCD? Insert the new paper roll to the Cover -Paper..
Is TPH OVERHEAT displayed on the LCD? Check the temperature of TPH.
Is the document copying blank paper? Copying the document, check the light of led of CIS.
Check the CISs harness that is connected to the CIS correctly.
Check the CISs harness that is connected to the MAIN B/D-P102.
Check the TPHs harness that is connected to the MAIN B/D-P105.
Check the TPHs harness that is connected to the TPH module.
5.2.5. The machine doesnt come out papers correctly.
Check point Solutions Is the machine jammed the paper? After opening Operation panel, exclude the jammed paper.
Even if insert the paper, RX m otor dont operating. Check the PDS.
Check the PDS harness that is connected to the MAIN B/D -P106.
Check the RX motors harness that is connected to the MAIN B/D-P104.
Is TPH OVERHEAT displayed on the LCD? Check the temperature of TPH.
5.2.6. Telephone doesnt operate when power turn off.
Check point Solutions Is MODULAR JACK correctly connected? Check the line terminal that is connected to the MODULAR JACK
correctly.
Are TEN keys correctly inputted? Check the harness that is connected to the MAIN B/D -P202.
Check the harness that is connected to the OP B/D -P503.
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5.3. Troubleshooting & diagnosis the board
5.3.1. MAIN board troubleshooting & diagnosis.
- Doesn't power on.
No. Check point Solutions1 Is the power of MAIN B/D-P101(+5V) normal? Check Power Supply.
2 Is the MAIN B/D -P109 connector correct ly? Check OP-Panel.
3 Is the 2nd pin of MAIN B/D -U2 (+3.3V) correctly? Check the MAIN B/D -U2.
4Is the 75th pin of MAIN B/D U8 signal correctly? Check the MAIN B/D U8(Engine).
Check the MAIN B/DU4(SRAM).
5Is the A[0..16], D[0..7] of MAIN B/DU8
signal correctly?
Check the MAIN B/D U8(Engine).
Check the MAIN B/DU4(SRAM).
6Is the 160th pin of MAIN B/DU8 signal correctly? Check the M MAIN B/D -Y1(32.256MHz).
Check the MAIN B/D -R20,-R21-C16,-C17,-C18,-L2.
7Is the 73rd pin of MAIN B/D U8 signal correctly? Check the MAIN B/D -Y2(32.768KHz).
Check the MAIN B/D -R26,-C19,-C20.
8Is the 61st pin of MAIN B/DU8 signal correctly? Check the MAIN B/D -U8(Engine).
Check the 12th pin of the MAIN B/D -P109.
9Is the 13th pin(+5V) of MAIN B/D -P109 signal
correctly?
Check the OPs harness that is connected to the MAIN
B/D -P109.
- Doesn't Display on LCD.
No. Check point Solutions1 Is the power of MAIN B/D-P101(+5V) normal? Check the Power Supply.
2 Is the MAIN B/D -P109 connector connected correct ly? Check the OP B/D.
3Is the 13th pin of MAIN B/D -P109(+5V) correctly? Check the OPs harness that is connected to MAIN B/D -
P109.
4 Is the 61st pin of MAIN B/D-U8 correctly? Check the MAIN B/D -U8.
5 Is the 5 ~ 11th pins of MAIN B/D-P109 correctly? Check the 94 ~ 100th pin of MAIN B/D U8.
6 Is the 12th pin of MAIN B/D -P109(LCDCS) correctwith pressing a key?
Check the 61st pin of MAIN B/D-U8.Replace the LCD.
7 Is the 6th pin of OP-P502 correct? Check the 6st pin of OP-P502.
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4) T PH clock (2 00 KHz)
No. Point to check Solutions
1
Does the 42nd pin of MAIN B/D -U 8 operate at 200
KHz?
Check the MAIN B/D -U8.
Check the 10th pin of MAIN B/D -P105.
Check the TPH harness that is connected to the TPH
module.
- Even if document insert to the document guide, TX motor doesnt operate.
No. Check point Solutions
1
Does the 16nd of MAIN B/D -P109(DDS) operate from
low level to high level?
Check the 2nd pin(+3.3V) of MAIN B/D-U2.
Check the OP harness that is connected to MAIN B/D -
P109.
Check the MAIN B/D-R81.
Check the 51st pin(DDS) of MAIN B/D -U8.
2 Does the 7,8th pin of the MAIN B/D-P101 come out+24V? Check the 53rd pin(24V/ON) of MAIN B/D-U8.Check the MAIN B/D-P101.
3
Does the 1,2,3,4th pin(mTM[0..3]) of the MAIN B/D -
P103 come out signal?
Check the 166-169th pins(TM[0..3]) of MAIN B/D-U8.
Check the +24V that is supplied to MAIN B/D-U5.
Check the input port(1,2,6,7th pin) of MAIN B/D-U5.
Check the output port(16,15,11,10th pin) of MAIN B/D -
U5.
Check the TX motor harness that is connected to MAIN
B/D -P103.
Check the TX motor.
- Even if paper insert to the Cover-Paper, RX motor doesnt operate.
No. Check point Solutions
1
Does the 3st of MAIN B/D -P106(PDS) operate from
high level to low level?
Check the 2nd pin(+3.3V) of MAIN B/D-U2.
Check the PDS harness that is connected to MAIN B/D-
P106.
Check the MAIN B/D-R80.
Check the 52th pin(PDS) of MAIN B/D -U8.
2Does the 7,8th pin of the MAIN B/D-P101 come out
+24V?
Check the 53rd pin(24V/ON) of MAIN B/D-U8.
Check the MAIN B/D-P101.Does the 1,2,3,4th pin(mRM[0..3]) of the MAIN B/D-
P104 come out signal?
Check the 162-165th pins(RM[0..3]) of MAIN B/D -U8.
Check the +24V that is supplied to MAIN B/D-U6.
Check the input port(1,2,6,7th pin) of MAIN B/D -U6.
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- Dont operate a copying of document.
1) In case of printing the Service List.
No. Check point Solutions
1Does the 115th p in(CISCLK) of MAIN B/DU8 come
out at 500 KHz?
Check the solution of CIS clock part.
2Does the 118th pin(CISTR) of MAIN B/DU8 come out
signal?
Check the MAIN B/D -U8.
Check the 4th pin of MAIN B/D-P102.
3
Does the 84th pin(VIN) of MAIN B/D -U8 come out
signal?
Check the CIS harness that is connected to MAIN B/D-
P102.
Check the 1st pin of MAIN B/D-P102.
Check the MAIN B/D-C12,-R13,-R14,-D2,-D3.
Check the CIS harness that is connected to the CIS module.
2) In case of no printing the Service List.
No. Check point Solutions
1Does the 42nd pin(PCLK) of MAIN B/D-U8 come out
at 200 KHz?
Check the solution of TPH clock part.
2Does the 44th pin(PLAT) of MAIN B/D-U8 come out
signal?
Check the MAIN B/D -U8.
Check the 3rd pin of MAIN B/D-P105.
3Does the 43rd pin(PDAT) of MAIN B/D-U8 come out
signal?
Check the TPH harness that is connected to MAIN B/D-
P105.
- Doesn't operate a Transmission of document .
No. Check point Solutions 1 Is the 0dB-2100Hz transmitting in service mode? Check the Tel line.
2
Does the TXA signal come out? Check the 7th pin of MAIN B/D-U9.
Check the 17th pin(TXOUTP) of MAIN B/D-U7.
Check the 146th pin(SOUT) of MAIN B/D -U8.
Check the MAIN B/D -T1.
Check the MAIN B/D -K1.
3
Does the RXA signal come out? Check the MAIN B/D -U11.
Check the 9th pin(RXIN) of MAIN B/D -U7.
Check the 147th pin(SIN) of MAIN B/D-U8.
- BEEP/RING isnt adjusted by a electrical volume.
No. Check point Solutions
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- Even if lift up handset, this machine doesnt detected the off-hook.
No. Check point Solutions
1Does the 142nd pin(mHOOKD) of MAIN B/D-U8
come out low level?
Check the 142nd pin of MAIN B/D-U8.
Check the connector ass y of MAIN B/D-P203.
- The others problems
No. Check point Solutions1 Not switched to FAX. Check the MAIN B/D -K1,-U17,-Q2 4.
2 Do not transmit and receive. Check the No.1 & RX, TX part of main board.
3 Do not Auto Start Check the No. 2.
4No DP dialing is possible while using TEN keys. Check the OP-Panel.
Check the MAIN B/D -Q24.
5 No DTMF dialing is possible while using TEN keys. Check the OP-Panel & No. 4.
6No operation of internal handset. Check the Tel. line modular jack.
Check the MAIN B/D-U19,-K1 & internal handset.
7Any voice isnt transferred to RX-unit. Check the MAIN B/D -U19.
Check the RX-unit.
8The Ring sound isnt heard. Check the MAIN B/D -U16,-ZD21,D22,C201,
-R202,-R201.
9 Dial tone does not hear when pressing the ON-HOOK. Adjust to the Electronic volume.
10After pressing the ON-HOOK, no switched to TEL. Check the MAIN B/D-mHOOK,-K1,U17,Q24.
Check the No. 6.
- Telephone doesnt operate when power turn off.
No. Check point Solutions1 Not switched to handset. Check the HOOK SW.
2No DTMF dialing is possible while using TEN keys. Check the OP-Panel.
Check the MAIN B/D -U22.
3The Ring sound isnt heard. Check the SLIDE SW(SW1).
Check the MAIN B/D -U18,U20.
4Any voice isnt transferred to RX-unit. Check the MAIN B/D -U19.
Check the RX-unit.
5.3.2. OP Board Troubleshooting & diagnosis
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5.3.3. Power Supply Board Troubleshooting & diagnosis
NO Failure Type Check point
1 No Output power
1. Make sure that Power Cord is normally connector.
2. Make sure whether LINE Power is defective or not.
3. Make sure that Fuse is open.4. Make sure whether FET(Q1) is defective or not.
2No Output power of
+24V
1. Make sure that there are short -circuit between the terminals of output.
2. Make sure that Over Current Protection circuit normally operates when
over current flow in.
3. Make sure that Diode(D6) is failure.
4. Make sure the Base of TR(Q3).
5. Make sure the contacting point of RL1.
3
No Output power of
+5V
1. Make sure that there are short-circuit between the terminals of output.
2. Check that Regulator(U4) is normal.3. Check that Diode(D5) is normal.
4No output power of
-12V
1. Make sure that there are short -circuit between the terminals of output.
2. Check that Regulator(U2) is normal.
3. Check that Diode(D7) is normal.
5ON/OFF Fail of
+24V
1. Make sure that there are short - circuit between Base and GND of TR(Q3).
2. Make sure that TR(Q3) is normal.
3. Make sure that RL1 is normal.
6Power ON/OFF
Repetition
1. Make sure that there are short - circuit.
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6. PART LIST
6.1. Mechanical Part List
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NO Description XMC part number
1 WINDOW LCD 062F73037
3 PANEL OP 002F731944 LCD 123F73017
6 KEYTOP OTC 110F73102
7 KEYTOP TEN 110F73100
9 KEYTOP PHONE 110F73101
10 KEYTOP STOP 110F73099
11 KEYTOP START 110F73098
12 RUBBER PAD OP 019F73054
13 RUBBER PAD ADF 019F73055
14 SPG PLT ADF 009F73138
15 BKT ADF 030F73018
16 LEVER DPS 011F73045
17 LEVER DDS 011F73044
18 HOLDER ADF 147F73075
19 SPG ADF 009F73139
20 BKT HINGE L 030F73029
21 BKT TORION L -> SPG TORSION L 009F73142
22 BKT SUPPORT L 030F73021
23 SPG GND ROLLER 009F73140
24 GUIDE UPPER 038F73064
25 BKT SUPPORT R 030F73020
26 BKT TORION R -> SPG TORSION R 009F73141
27 BKT HINGE R 030F73019
28 ROLLER CIS 022F73120
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29 BUSH CIS L 016F73050
30 BUSH ROLR L 016F73051
31 GEAR CIS 007F73135
32 GUIDE LOWER 038F73065
33 SPG TPH 009F7314334 BKT RECEIVER 030F73022
35 BKT TPH L 030F73024
36 BKT TPH R 030F73023
37 TPH 046F73026
38 BKT TPH COVER 030F73025
48 HOLDER CIS L 147F73076
49 CIS 130F73121
50 HOLDER CIS R 147F73077
51 SPG CIS 009F73144
52 MOTOR RX 127F73050
53 MOTOR TX 127F73051
54 BKT MOTOR 030F73026
56 GEAR 40 007F73137
57 GEAR 32 007F73136
59 BUSH OILNESS 016F73055
60 GEAR TPH 007F73138
61 ROLLER TPH 022F73122
63 BKT LOCKER 030F73027
64 COVER PAPER 002F73196
65 PDS SENSOR AS 130F73122
66 COVER GEAR 002F73198
68 LINE CORD 117F73072
70 COVER BOTTOM 002F73195
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71 KNOB OPEN 003F73038
73 SPG PLT LOCKER 009F73146
76 BUSH CLUTCH ASF 016F73054
77 SPG CLUTCH ASF 009F73145
79 BUSH ROLR R 016F7305280 ROLLER ADF 022F73121
81 BUSH ASF 016F73053
82 PCB MAIN AS 140G73198
83 SMPS 105F73050
84 BKT BASE 030F73028
86 TRAY DOC 050F73039
87 GUIDE DOC L 038F73066
88 GUIDE DOC R 038F73067
89 COVER TOP 002F73197
90 LEVER HOOK 011F73046
92 SPEAKER 130F73123
93 SPG PLT SPEAKER 009F73148
94 GEAR ADJUST common with L-711
95 SPG ADJUST 009F73147
96 OP PCB AS 140G73199
IC EEPROM 133F73182
H/S CORD 117F73073
RX UNIT (Gear Drive Unit) 007F73139
OP AS (Operation Panel assy) 002F73199
HANDSET ASSY 110F73097
SHFT ADF 006F73030
NO.
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F223 7 - 4
7. CIRCUIT DIAGRAM
7.1. Block diagram
KEY MATRIXDDS
TRANSFORMER
MODEM
TX MOTOR
MAIN
INTERFACE
TAD/EXT
1 2
H/S
(Automatic Document Feeder)
(Document Detection Sensor)
PART
TEL/LINE
VOLUMESELECTION
RX MOTOR
REAL TIME MULTITASKING
SPEAKER
+5V : 0.45A
RINGDETECTION
TONE & CID
4LCD 16 X 1
9
RESET LOGIC
CIS
(Paper Detection Sensor)
5
NETWORK
CID DETECTION
+3.3VCIRCUIT
+24V : 1.2A
(Thermal Print Head)
8
DIALERTONE/PULSE
MODEM : 14.4Kbps
SLIDE B/D
SRAM
POWER SUPPLY
BLOCK DIAGRAM
MICROPROCESSOR(MC24)
3
#
VIDEO & SCANNER PROCESSOR
SMPS
32KB
TONE RINGER
(Document Position Sensor)
TPH
HOOK B/D
HOOK S/W
-12V : 0.03A
EEPROM
THERMAL PRINTER CONTROL
7
MOTOR
PSTN
ADF
6
TAD
DRIVER
IAA(20415)
128KB
AC
LINESELETION
(Scanner Control
& VideoProcessing)
PDS
CONTROL
INLET
HANDSET
LINEINTERFACE
*
POWER DOWN CXD9450INTERFACE
0
SRAM BACK-UP
OP
DPS
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7.2. Connection diagram
T
.P
.
H
P103
4
3
1
16+24V
3
1
13
DB6
16DB7
3
2
VCC
LIVE
+24V
2
4
14
P109
OPO2
DGND
VOL2
GLED(GND)
VIN
TAD OR EXT.TEL
10
INT. TELHANDSET
1
8
6
32
18
THD
PAPER
15
7
WHITE
AGND
GND
NEUTRAL
+24V
mRM0
3
1
2
5
mHOOKD
VOL1
VCC
5
AGND
8
4
3
4
1110
6 L CDCS
REC-
P206
-12VA
TM
2
mTM0
6
5
54
10
1
4
NC
2
CISCLK
3
MIC-
SPEAKER
P106
3
OPO1
7 DI
6+24V
DGND
CIS
P204
6OPO0
2
VOLUME
4
mSTB1
F.G
mTM1
4
1
2
1
POWERDOWN
GREEN
3
TEL-LN
+24V
6
2
3
PDS
P202
12
OPO0
9
7
8
14
SIG
7
R4
1
2
1
mSTB2
2
+24V
2
5
10
P501
7
1
OP
PAN
EL
9
OPI1
2
TEL
MOTOR
DGND
6
2
OP
P502A
1
7
5CLOCK
OPO1
R3
1
TX
mLATCH VDD
mTM2
NC
6
11 11OPO5
CONTRAST
9
3
3
1
4
OPO4_RS
VCCDGND
DDS
RX
BPLAT6
6
R2
13
-
CIS
CLK TM
mTM3
7
4
+24V
5
18
2
OPI3
DGND
12
4
VCC
PO
WER
1
7
5
4
2
DGND
HOOK
DG24DG24 VLED(+24V)
2
R1
VH DGND
6
+24V6
DG24
6
14
4
17
1
DGND
BLACK
3
2
9
2
14
MJ1
-
2
HOOK
S/W
BmSTB1
9 T.P.H
1
5
SPKOUT
C3
POWER
VH DGND
mRM33
17
8
MJ3
3
1
1
5
8
5
LCD
VCC
6
1
RS4 3
PAPER
9
5
12
P105
3
C2
DB4
5
+24V
PD01
MOTOR
mRM2
5
5
2
2
MJ2
P203
2
5
1
3
OPO4_RS
M
ODU
LA
R
VO
DETECTION
2
4
BmSTB0
13
5
C1
SENSOR
DGND
RED
6
+24V
VH
RM
5
1
2VCC
E
SENSOR
2
LINE
1
4AC
OPI2 VCC
DPS
OPO3
3
7
15
4
MIC+
DECTECTOR
-
4
CONNECTION DIAGRAM
P104
mSTB4
4
12
4
P
2
0
1
DB5
1
1
2
7
7
31
16
1SPEAKER
2
DG24
BPDATVCC
4
LCDCS
SLIDES/W
6
32
mSTB3
7
BmSTB0
11
9
OPO2
1
10
3
DGND 6
3
15
LCD
1
SI
3
13
NC
5
7
TM
P101
MAIN
PD02
4
BmSTB1
OPI0
PANEL
8
8
24V/ON
VH
2
1
mRM1
R/W
8
P503
GND
CISON
-
3
7
6
MOTOR
BOARD
MOTOR
GND
6
1
+24V
BPCLK
16 X 1
OPO6
3
P502
P102
DGND
AC INPUT
5
3
5
P108
3
8
OPO3
7
CISTR
4
H/SMOD.
12
REC+
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