pt 770 repair course

Panasonic Service and Technology CompanyNational Training

Troubleshooting GuideDVD Player / Audio Home Theater

Model SC- PT464

SA-PT464SA-PT670SA-PT673SA-PT770

SH-FX70

Applies to models:

TTG090815HC/090815

Model SC- PT7705 Disc Changer

5.1 Channel sound

Wireless rear (SH-FX70)

1 Disc Transport

5.1 Channel sound

Slide # 2

Prepared byInstructor Herb Chin

Panasonic Service and Technology CompanyNational Training

Warning This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

Copyright 2009 by Panasonic Service and Technology CompanyAll rights reserved. Unauthorized copying and distribution is a violation of law.

"HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC.““Vera Link” is a trademark of Matsushita Electric“IPOD” is a registered traidmark of Apple Inc.

Slide # 3

Contents

Hints • Part Numbers, New Error Codes,

Reset, Forced rear channel sound 4• Troubleshooting by plug removal 5

Access• Arial View 6• Layout – connectors, test points 7

Mechanism• Mech Problem or Micro? (11 mins) 9• Mech Access (7 mins) 11• Mech Operational Concept 13• Mech Alignment 14

Power On Sequence (lost? Use this) 19Power Supply

• Dead Set – No Power On 20• Abnormal Voltages (too high or low) 20

Protection • Concept 22• Diagnose to a board (6 mins) 23

SMPS board isolation (3 mins) 24• SMPS Bd. Repair 25• D Amp Bd. Repair 26

Audio Problems• Troubleshooting Plan 28• Troubleshooting Diagram 29

Wireless Problems• Concepts 5.1 & 7.1 setups 31• Troubleshooting Plan 33• Pairing / Matching Tran-Rec 34• Transmitter / Rec Repair 35

IPOD ™ Video Connections• Compatible models 38• No Video Output? 38

page

page

Slide # 4

Hints – I - Common p/n, II - All Speaker Tests, III - Missing error codes, IV – Reset, V – No Display

No + 9V, + 5VDoGb470ja008FP2902/R2902 (no display)

No – VP, FilamentK5H1022A0011FP2901 (No display)

RD-DDtx005-V5 Disc (Traverse) Laser

SA-PT464RD-DDtx001-V 1 Disc (Traverse) Laser only

SA-PT464N/ADLS6, 1 Disc Mech

CHGR ERRORREEX0958mech front ribbon (11 pin)

With 2 rear ribbon cables & laser

RD-DDC027-SCR-14, 5 disc complete Mechanism (w laser below)

Repx 0679bReceiver card

Must Pair / match* after replacement. See the wireless sect of this book.

Repx 0678cTransmit Card

IC5000,5100,5200,C1bA 00000 487Output ICs

L6FAJCCH 0007Fan

1 disc mechN2QAyb 000 360Remote SA-PT464

5 disc mechN2QAyb 000 359Remote SA-PT770

NoteP/NDescription

I Popular Part Numbers

IV Reset after DVD Board replacement:1. After replacing the DVD board Play the recovery disc

(p/n = RFKZD 03r005) containing firmware + update. Select yes or no for update (which may be the old one).

1. Reset –1. Select DVD mode & wait for “1 No Disc” display.2. Press >10 (remote) and (panel). = Stop.3. Until the display = “INIT”.4. While still pressing STOP , also press the remote

OK button until the word “RESET” appears.5. Power off the unit and unplug for 1 min.

III Error Codes (not in the Service Manual):Changer Error – appears when a button is pressed and the mechanism is not responding. Go to the mechanism troubleshooting of this book to determine if it is mechanical.

Sum Error – Incorrect communications with DVD board micro. Transport is dead, DVD can not be selected. Replace 50 pin ribbon cable or DVD bd.

F897 – Play the recovery disc and reset the unit. (see the Reset procedure below).

N2QAyb 000 359 for SA-PT770

II Surround Sound Speaker testsAux and CD sources do not use the rear speakers. To get

rear speakers to work for testing, turn on MULTI-CH surround sound using the remote:

1. Repeatedly press the remote’s SURROUND button until MULTI-CH appears on the unit’s display. The rear speaker channels will have the same sound as the front but in monaural.

V No Display and / or Shutdown1. Check under the SMPS board fuses.

2. Use Power Supply (P19) and Protection (P24) diagrams to test fuses from the top of the board and to find failure causes (loads) by disconnecting CN2016/pins 8, then 9 to ID the short.

Slide # 5

Hints – Troubleshooting by connector removal

Unplug CN2001 50pin DVD ribbon

Display:HelloChangeCloseAudio:Last input only.H.Phones OK

Works No response

DVD Bd. DisconnectedUnplug CN2011 11pin ribbon

Works No responseButtonsup/dwn OK

DisplayHelloPlease WaitGoodbye0-50 volume

Audio: Last input onlyH.Phones OKMisc:Remote = OK Fan = OK

Disc Mech Disconnected D Amp Bd DisconnectedUnplug CN5050 17 pin ribbon

Works No responseNo front wired speakers L, R, C, S

IPOD Disconnected

Works No response

Front Panel Disconnected

Works No responseUnplug CN2007 19 pin ribbon

Set is dead

Unplug CN2007 after power on

Works No responseAlmost Everything

TV Display OK

IPOD

No Front panel buttons nor remote

No volume control

No Display

No headphones

Unplug CN6003 14 pin ribbon

Almost Everything

No IPOD power or requignition

Suspect a board or mech causing micro lockup? Unplug the connector listed and if the symptoms on your unit now match the ones listed below from the good unit, the disconnected device or its ribbon cable is bad in your unit. Previous Layout diagram shows connectors.

Mech: Dead

Buttons: No selector (stuck)No smart setup

Display:CHGR ERRCHANGE (blinks)Then Dark

Audio:OK except disc

Misc:

Mech: Dead

Buttons:No Open / CloseNo 1-5 Disc No Selector

Display:CHGR ERR

Audio:OK except disc

try

Buttons: OK

Display: OK0-50 volumeAudio: H.Phones OKRear wirelessMisc:Remote = OK

Fan = OK

Almost everything

Nothing

Slide # 6

Access - SA-PT770 Home Theater Main Unit

SA-PT770 Arial View transport cover removed

CR-14 Mech cover removed

IPOD

panelmech Mic

Access

Slide # 7

Access - Model SA-PT770 Layout Diagram

• Use connectors as test points to troubleshoot from the top of the unit.

• Only the Connector’s last pin is shown. The other end is pin 1.

• All diagnostics / testing is done from the top of the unit using later stategies.

• Model SA-PT770 does not use a Surround Output IC5400.

F76 error code - check for missing voltages at H2901

F61 error code - 0.6vdc at C5133 means an output IC is bad. 0V = OK.

If the unit stays on after jumper W5002 is cut, the problem is in the fan circuits on the D Amp board.

No Display – check FP2901 & FP2902 fuses on the SMPS board. Fuses are at the board bottom.

Use the SMPS circuit diagram (page 25) and this layout to check voltages before & after fuses from the top using the W5ooo jumpers shown at left.

Access

Notes

Slide # 8

Contents











IPOD Video Connections• Compatible models 38• No Video Output? 38

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Slide # 9

Mech Troubleshooting. Is it the Mech or the Circuitry?Mech Jammed? Replacing the mech is the fastest way to find out if the mech is bad. However if the circuitry is bad, the new mech will be damaged. Within 14 mins, you can check the circuitry by following this procedure. Troubleshooting Concept - Unplug the cable between the mech & main board. Measure the main board voltages. The board is mostly good if the voltages are OK. Reconnect the cable and re-measure. The mech is bad if the voltages do not agree with the chart. If the voltages do agree with the chart, the micro (main board) is bad. The procedure begins at right. The chart is on the next page.

1. Unplug the ribbon cable from socket CN2011.

2. Measure the voltage at each of the CN2011 socket pins. The voltages should be identical to the ones listed on the next page.

3. Open the front panel door. Note which tray is further inside the unit at the laser assembly (see left).

4. Continue next page.

Tray 1 position

(Default)

rear

SA-PT760 Front view door down

Tray 2 loaded in the laser assembly



Procedure:3. Open tray door and look in. Which tray is recessed?

Slide # 10

Mech Troubleshooting. Is it the Mech or the Circuitry?

When the mechanism does not work correctly, is the problem mechanical? Is it a sensor under the mech? Is it on the main board by the microprocessor?

CN2011 Connector Voltage A B C D E F G

CN2011/pin

No CN2011 cable

Tray 1 in

Trays 2-5 in

All trays out

CN2011/pin corresponds to:

Changes during

1 8.2V 7.5V 7.5Vdc 7.5Vdc Motor driver Vcc 2 gnd No change 3 5Vdc 5Vdc 5Vdc 5Vdc Q4 Mode sensor Elevator dwn 4 gnd 5 5Vdc 0Vdc 5Vdc 0Vdc SW3 Top sw 6 5Vdc 0Vdc 0Vdc 0Vdc Q1 UD (lever

sensor) Trays stocked

7 0Vdc 0Vdc 0Vdc 0Vdc Motor fwd 8 0Vdc 0Vdc 0Vdc 0Vdc Motor rev 9 5Vdc 0Vdc 0Vdc 0Vdc Q2 close (gear

sens)

10 5Vdc 0Vdc 0Vdc 5Vdc Q3 home (gear sens)

Tray moves back / forth

11 5Vdc 0Vdc 0Vdc 0Vdc Q5 open (lever sens)

H at tray out

Isolation Procedure:1. Unplug the ribbon cable at CN2011. Measure the CN2011 connector voltages.2. Are your actual voltages same as in column B?.

• DIFF - the CN6001 cable or main board is at fault. Check main board, pull up resistors and for cracks. • SAME – Same voltages means the problem is in the mechanism or its ribbon cable. Continue.

3. Note the position of the trays in the mechanism. Reconnect CN2011.4. Mech repair - Are your actual voltages same as in columns C, D, or E? Choose the column

that matches tray position or Order a mech (p/n = RD-ddc 027-S). • DIFF – the sensors that corresponds to the incorrect voltage is bad. (column F). Replace the entire

assembly or the corresponding sensor.• SAME – a mechanism sensors are good and the mech is out of alignment.

11

Slide # 11

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Slide # 12

Mechanism Access for Alignment

Cover removal Spindle magnet plate removal

Cover removal

1. Remove 2 rear screws holding down the Mech.

2. Slide the mech out and unplug the 3 ribbon cables.

3. Push down on the 2 plastic catches and slide the top plastic cover ¼”rearwards to unlock.

4. Lift up the top plastic cover about ¼” for clearance and slide out toward the front to unhook the 2 tray stop arms. Slide the rear ribbon cables off the cover.

5. Bracket - Remove the spindle magnet plate by pulling in on the 2 plastic catches, then lift the plate up and out.

¼”

up

out

¼”

The mech must be lifted out to remove the cover or you will rip the 2 rear ribbon cables.11

2

3

3

4. Slide cover off

5

2

Slide # 13

5 Disc Mechanism - Concept & Transfer Alignment 1/4Operational Concept:

There are 2 motors and 8 sensors in the CR-14 mech.I. Motor 1 - The traverse motor moves:

• Laser back & forth • Clamps disc• Pulls trays into the laser assembly

II. Motor 2 - The stocker motor moves: • Tray(s) between the middle stocker

area (fig 2) and out of the assembly (for disc insertion)

• Traverse / laser platform up/dwn,

III. Sensors – A tray from the stock area must be transferred to the laser area for playback.

1) Tray transfer is made after the traverse assembly elevators to the desired tray level. The following occurs in the rear traverse assembly:

2) The traverse motor uses arms to pull the tray into gear #331. [Pictures in the fourth slide 4/4.]

3) SW4 opens (fp 8251) to tell the micro the tray is in.4) The traverse motor continues to turn, bringing the tray

in, then clamps the disc5) SW5 opens (fp 8251) at clamp end and sled moves a

little away from home.6) The sled moves the laser to the approx TOC disc area

& stops. The laser comes on, lens focus searches and if a disc is found, spins it.

7) SW4 and SW5 are both inside the Traverse assembly. Traverse (laser) assembly: p/n = RD-DDtx002-V

Mech:p/n = RD-ddc 027-S

Figure 1 – Motors

laser

Tray 1

Stock motor

Traverse motor Top

view

laser

Stock area

Trays 2-5rear

Figure 2 – Default position

side view

Ribbon cables

Slide # 14

5 Disc Mechanism - Assembly Transfer Alignment – Trays Out 2/4

Preparing the Traverse unit for docking:

1. Trays Out (laser down)

2. Rotate the black gears so the white slider and laser are forward, as shown.

Next page is a close up picture.

Rear

Figure 3

Slide # 15

5 Disc Mechanism Assembly Transfer Alignment – Trays Out 3/4

Preparing the Traverse unit for docking:

3. Slide the top #336 sub slide plate inside the cutout to the left, or as far as it will go without force (left is pictured down). (Final position shown.)

4. This permits the other end of the #336 slide plate to engage gear #331.

5. Rotate the #331 gear (cw) so the plastic arm of the sub plate points past the triangle cutout, all the way left (shown). This is the elevator free position.

6. The rear Traverse portion of the mech is ready for docking with the front tray assembly.

7. Optional - At the middle tray area (bottom picture), you may manually rotate the stocking motor gear so the black gear hole lines up here. It will pwr to this position anyway.

8. Plug in the mech’s 3 ribbon cables and test or manually test on the next page.

rear

# 331 gear

front

left

cutout

# 331 gear

Slide # 16

5 Disc Mechanism Assembly Transfer Alignment – Tray In 4/4

Fig 5 – Traverse assembly elevatored up to tray level. Note position of #333 tray load lever for elevator operation.

Fig 6 – Traverse motor moves #333 lever to pull tray 1 in.

Fig 7 - #333 lever slips under tray 1.

Fig 8 - #333 lever pulls tray 1 into gear #331 on the other side (not shown).

Gear #331 grabs the tray teeth and pulls the tray into the laser assembly.

rear

Lever #333

Laser area Stock

area

You can rotate the black gear and watch lever 333 grab a tray and pull it into gear 331 as shown in the pictures starting above moving clockwise.

Manual Test

Gear #331

Slide # 17

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Slide # 18

Power On Sequence

Duplicates panel display (IPOD = “No connection”)

Last input used appears (IPOD/AM/FM/Aux)

3 sec

Blue initial screenFan TurnsHELLO2 sec

GrayAC Relay click1 sec

BlackDark0 sec. Press Pwr

TV screenObservation Panel DisplayTime

Plug-in, Power ON Sequence – When the last Input Selected was NOT DVD / CD

TV screenObservation Panel DisplayTime

BlackPress PwrDark0 sec.

GrayAC Relay click1 sec

Blue initial screen

Fan TurnsHELLO2 sec

“Reading”Laser sleds to home, out and looks for disc 2 times.

“3 - - - -” then “3 oooo”12 sec

Time or MovieDisc found -3 Hrs:Mins (total CD time)4 Play - DVD

23 sec

Smart Setup? Y / N

No disc found –a) Tray 3 goes back to stock area. Laser

elevators up to tray 1. Tray 1 loads and returns to stock. Laser elevators down to original tray (3). Laser looks for disc. Stop.

b) Laser sleds to home, out and looks for disc 2 times.

3 No Disc23 sec

Plug-in, Power ON Sequence – When the last Input Selected was DVD / CD

Use this Power on Sequence to quickly check for a non-operational

• Fan, • relay, • sled motor, • laser, • focus • search coil, and • microprocessor sequence

by observation.

Dead Set? See the Power on section in this book, P19.

Powers on but locks up? Try troubleshooting by connector removal earlier in Hints, P5.

Shuts off after Relay clicks? Go to the protectionsection of this book, P21.

Fan comes on but the laser doesn’t move? Power supply, jammed mech, ribbon cable connections are suspect. Use the layout diagram to measure voltages. Then theProtection diagrams show the voltage sources, P21.

Lost?

Slide # 19

Power Supply / Power ON Dead Set?I Replace the standby T5751 and / or

the standby IC5799.

II Relay does not click?Standby supply or micro is not working.

a) If Standby 5V is NOT at H2901/pin 13, problem is in the standby circuitry. Use floating ground and measure feedback voltage at IC5799/pin 2 to determine if before pin 2 or after.

b) If Standby 5v is present at H2901/pin 13, monitor H2900/pin 6 while pressing the power on button. Pin 6 goes to 4Vdc? The problem is on the SMPS board. Pin 6 is 0Vdc? Main board is suspect.

III Relay clicks?Main power supply is not working.

a) If no secondary voltages are at CN5500/pins 1, 3, or 8, check IC5701 start voltage at C5726. No voltage? Check R5723-24, D5701, relay. At least 9V? IC5701, IC5801 are suspect.

b) If secondary voltages at CN5500 are low, replace Q5863, IC5701 and IC5801.

c) If the secondary voltages (CN5500) are normal, main power supply is working but the problem is an open 1A display fuse FP2901 at the back of the SMPS board.

IV No Display? Shuts Off? Check FP2901, FP2902 on the SMPS board P24.

Slide # 20

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Slide # 21

Protection Concepts

F61 = 7 possible causes

F76 = 7 possible causes

No code = either of theabove or 2 more causes *

Shutdown Causes

D Amp Bd.

SMPS Bd.

Main Bd.

* Start by Measuring voltages at CN5500,

then continue with the F61 procedure. See next page diagrams.

10 min. Diagnostic method.

Start - next page.First find the bad board then find the

bad part.

Protection

Slide # 22

Protection - Repair to Board Level - 6 minsFind the bad board* F61 error Procedure:1. Unplug CN2009. (see layout diag.)

2. Turn the unit on. If the unit stays on (no code), the problem is in the D amp board. Continue if F61 exists.

3. Remove pin 5 from SMPS board connector CN2017 and plug CN2017 back in. (picture next slide)

4. Turn the unit on. If the unit stays on, the problem is in the SMPS board. Go to SMPS Bd. Repair.

5. If -30Vdc is missing at D Amp CN5500/pin 3 or the fan does not rotate at power on, the SMPS board is now suspect.

6. If the voltage and fan are both present, the Main board IC2001 or pull-up resistors are suspect.

7. Go to the next pages for repairs on the D Amp or SMPS board.

* F76 error Procedure:1. Remove CN2017/pin 5 and plug CN2017

back in. No shutdown? Go to the SMPS board repair page.

2. Shuts down? Use the layout diagram to measure the voltages at H2901.

a) Voltage(s) missing? Go to the SMPS board repair page.

b) All voltages present? Main board defect. Use the left diagram to order the detection transistors / zener.

Protection

Slide # 23

SA-PT770 Receiver SMPS Board isolation - remove pin 5

1. CN2017 / pin 5 needs to be removed.

2. CN2017 / pin 5 removed

3. If the unit stays on, the problem is on the SMPS Bd.

Purpose: Remove the shutdown line from this SMPS board to Determine if the F61 error is caused by this SMPS board. The connector from a different model is shown.

Protection

Slide # 24

Protection - SMPS Board Repair - 3 min diagnostics

SMPS Board Repair Procedure:1. With CN2017/pin 5 still removed, measure the

voltages at H5801/end pins 1 and 8:

a) Pin 1 or pin 8 is 0Vdc? Open foil path. Resolder.

b) Pin 1 or pin 8 is higher than 13 or 22V (left top)? Refer to the Power On diagram in this book and troubleshoot or replace error correction IC5801, PC5702, Q5863.

c) Pins 1 and 8 are normal at 13V and 22V? PS is OK. The problem is at the left sensing circuit.

• Order & replace zener D5841, and Q5841 on the SMPS board (shown left).

• If those zeners are OK (correct replacements), there is an open foil or crack in the board causing the problem. Look for a crack in this board.

If the unit stays on with CN2017 pin 5 removed, the problem is on the SMPS board.

Protection

Slide # 25

Protection - D Amp Board Repair - 4 min diagnostics

Board Layout

D Amp Board Repair Procedure:

1. With CN2009 unplugged, what voltages are at the fan connector CN5501? (Do not unplug the fan.)a) 0V, 0.6V, 7V = Replace the fan.b) 0V, 0V. 0V = Q5640 open or foil open.c) 0V, 0V, 7V = Q5641 shorted.

2. While CN2009 is still unplugged (so the unit stays on), monitor the voltage at + C5133.

a) 0.6Vdc? An Output IC defect Measure each speaker voltage between the + & - terminals. Terminals = 0Vdc = normal. Replace Q5101,2.Terminals = + 0.5Vdc or more? Replace the corresponding output IC. E.g. -1.1Vdc is at the Center speaker terminals so IC5200 is bad.

b) 0Vdc? Normal voltage. Nothing wrong with the output stage. Proceed to step 3.

3. Cut W5002 jumper near the fan (locate using the layout diagram). Plug in CN2009 ribbon cable. Turn the unit on.

a) Unit shuts down with an F61 error code? Order & replace Q5101 and Q5102.

b) Unit does not shut down. Problem is in the fan circuitry on this D Amp board. Do step 1 above.

If the unit stays on with CN2009 unplugged, the problem is on the D Amp board.

Protection

Slide # 26

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Slide # 27

Sample Audio Problems – Troubleshooting Methods

Audio Troubleshooting Isolation Methods1. No Speaker Audio Causes (all inputs)

a) Pwr Supply loss – check for + 30Vdc at CN5500/4, 8. (locate using the layout diagram)b) No Osc input – check for 4.5Vp-p (375kHz) at pin 1 output IC5000-5400. Missing? Replace 5V Zener D5503, osc IC550 & IC5501.c) Muting – check for normal (unmute) voltage. CN2009/pins 12 = 0V , 13 = 0V, 17 = 5V. d) Muting – check for broken headphone jack Sw at CN2007/pin 5 [5V = hp in, 3.5V = hp out]

2. Missing 1 or more channels (remote is needed for rear speaker losses)

a) Spks – check for normal 5Vdc at each output IC5000-5400/pin 23 (last pin). [Mute = vol @ 0, HP jack.]

b) Spks – check for 4.5Vp-p (375kHz) at each output IC5000-5400/pin 1.c) Rear - Use the Audio Process diagram lower left instructions to select “Multi-Ch” music for rear audio. Then look for audio at CN2003 (scope). At the rear receiver, change switch to middle SURR position.

3. Hum - Unplug CN2009 and power the unit on.a) Hum still present? – “Damp” board problem. The board’s gnd should not touch the chassis.b) Hum gone? – SMPS or Main board problem. (Main transformer T5701 if lightning damage)

4. Mute Causesa) Volume set to “0” mutes all audio outputs (front, rear, and headphones).b) Headphone insertion instructs the micro to mute the front & rear spk output. (Check HP sw - use voltage at CN2007/pin 5) c) Check the mute voltages at CN2009/pins 17(5V = unmute), pin 13 (0V = unmute), pin 12 (0V = unmute). d) Unplug the tuner (from the main board) to see if a shorted tuner is killing data communications or clock lines. Unit works without the tuner module but no AM/FM is displayed when the selector button is pressed.e) DVD board no communications or its 50 pin cable is defective / damaged.

5. Low volumeCheck for Normal signal levels leaving the main board using the audio path diagram (next). Testing - set volume at maximum (50) without speakers connected. Use any signal source and a scope to monitor.

Refer to the Audio Path (next page) and earlier layout diagrams.

Audio

Slide # 28

Audio Path

Audio

Slide # 29

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Slide # 30

5.1 Channel Wireless

Wireless

Problem:

If the Surround Switch is incorrectly set left OR right, only 1 rear speaker will work.

Set to middle SURR position.

Wireless

5.1 channel transmitter

Wireless Receiver

Slide # 31

7.1 Channel Wireless Rear Setup

Left Side Sw Setting Right Side Sw Setting

with 2 Rear Spks ?

Rear Speakers don’t work? Check that the SURR switch at the back of the rear wireless receiver matches the 5.1 or 7.1 setup.

If the Surround Switch is incorrectly set, either 1 rear speaker will not work or be louder.

7.1 Ch 7.1 Ch

Only 5.1 Ch

Middle Sw Setting

w 4 rear spksw 4 rear spks

Wireless

Side speaker

Back speakers

Slide # 32

Model SA-PT770 Wireless Problem Troubleshooting Plan

Wireless rear receiver does not work – Main unit W1 display icon blinks (abnormal) at power on.

Wireless rear receiver does not work – Main unit W1 display icon does NOT blink (normal = solid).

1. RF connection has not been made - Go to the next slide to pair (match) the receiver to the transmitter. Steps 1-5 are for pairing. Step 6 is to get audio to the rear for final tests.

2. Receiver Defect - Advance 3 slides to troubleshoot the receiver. Make sure there is standby voltage input the receiver and the pair button is working (pin 9 grounds when the button is pressed.

3. Transmitter Defect - Advance 2 slides to prove the transmitter card Sw +5V voltage is input (main board CN802/pin 11) and verify data communications is present (CN802/pins 14-16) when the volume control is rotated.

1. The RF connection is OK but Audio loss or mute is the problem. Hint - Replace the transmitter card if warm/hot (damaged when plugged in while the unit was powered on).

2. Check for board cracks. Output IC5200 should be warm. Its mute (end) pin 23 should be 5V.

3. Turn on rear sound – Press SURROUND button on the remote until “ MULTI-CH” mode appears in the main unit’s display. This makes the rear surround speaker sound the same as main L & R.

4. Input an audio source (play some music).

5. Disconnect the speakers and turn the volume control to max. (until level number 50 is displayed).

6. Check for audio from the receiver card CN1000/pins 2 & 4. See signal levels at receiver repair.

7. No audio present at CN1000 (receiver)? Troubleshoot the transmitter. Check for audio at the transmitter CN2003/pins 2 & 4 (advance 2 slides).

8. If the power LED blinks alternately red & green at power on, replace the internal IC5200 output IC.

Wireless

Wireless rear receiver does not work – rear unit power LED blinks alternately red and green.

Replace the power output IC5200 and check for cracks on the board.

Slide # 33

Wireless Problems - “Pairing” / Matching Trans & Receiver

1. Turn the unit On with a transmitter card plugged in. W1 will blink on the main unit with a transmitter card plugged in (see below). Icons blink because the T + R are not paired (communicating).

2. Bring the wireless receiver nearby and plug it in. Press power on so the steady red light appears.

3. At the main unit, press the front panel’s FAST FWD button andthe remote’s 3 button at the same time (aim remote at the unit).

4. The letter P will appear on the main unit’s display for 1 minute.

5. While the P is present on the panel, at the back of the receiver unit, press the “ID” Set button. The W1 will stop blinking and the receiver’s red light changes to GREEN, indicating the transmitter and receiver have paired.Next check for rear audio.

Wireless

1. Transmitter card inserted W1 appears but blinks (not paired)

5. ID Set button

ID Set

Press Surround button repeadly until the display shows “Multi-Ch”. The rear speaker sound will be the same as the front.

Transmitter - Receiver Matching / Pairing Procedure:

6. Turn the main unit on. Aim the OEM remote (p/n = N2Qakb000359)at the main unit., and press the remote’s SURROUND button repeatedly until MULTI-CH appears in the display.

The rear speakers will have the same sound as the front but be monaural.

SABT770 Remote = N2Qakb000359

Testing the Rear speakers:6. Rear Audio Test

W1AM 1010

blinking

Front panel display

W1

blinking

Slide # 34

Wireless - Troubleshooting Information ½ - Transmitter partUse this diagram to: Prove that the T card is recognized (CN2003/pin 11). Power is getting to the T card (CN2003/pin 7). Audio is getting to the T card (CN2003/pins 2 & 4).

Notes:1. Measure the voltages at the CN2003 (main board) with the Transmitter card / Bd. plugged in.2. Channel 3 audio is present with a surround sound DVD source or if the MULTI-CH Mode is

turned ON with the remote’s SURROUND button. 3. S Data & SClk are only present when the T card is inserted and when there is a volume control

adjustment (panel or remote).

When the T card is inserted, (CN2003/pin 11 = gnd), the W1 icon blinks until paired with the receiver.

Front panel display

W1

Wireless

Slide # 35

Wireless - Troubleshooting Information ½ - Receiver

Use this diagram to prove the:

Receiver card is getting Stby power (CN1000/pin 5). Receiver card is outputting Audio (CN1000/ pin 2, 4). Receiver card is not muting the audio (CN1000/pin 10).

Transmitter card – REPX 678C

Receiver card - REPX 0679B* If the power LED blinks alternately red and green, the audio output IC5200 is bad or one of the + 30Vdc supply voltages to it is missing.

rotated

rear

On Sequence:1. Press Power On the receiver.2. Red * power LED turns on (proves

the internal receiver Bd. gets standby 5Vdc @CN1003/pin 3).

3. Internally the output IC5200 is kept off (IC5200/pin 23 = 0Vdc = IC OFF).

4. Press Power On the main unit so there is transmitted RF signal. W1 appears blinking in the main unit’s display (proving the trans card is in.).

5. RF is transmitted and the receiver responds with periodic replies.

6. RF Link - Proof the RF match/link is made: a) Main unit - W1 stops blinking. b) Receiver Bd - the power LED changes from RED to GREEN.

7. Receiver Operation - At RF link the Output IC5200/pin 23 receives 2.5Vdc to pwr ON but muted. At power on, it’s internal oscillator comes on (IC5200/pin 1 drops from -29Vdc to -25Vdc. 615kHz, 0.6Vp-p burst signal appears).

8. S Music - If S Music is turned on, the rear audio is unmuted at the transmitter and at the receiver (IC5200/pin 23 = 5Vdc). Activate S music in previous Testing the rear speakers procedure.

Use this as a Checklist to locate the problem:

Wireless

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IPOD ™ Audio / Video ConnectionNot all IPODs will play music or display video even though it docks. The list is below. Note: To display video with newer IPODs, you must turn on and enable the video feature from the IPOD menu before docking the IPOD to the Panasonic Home Theater.

IPOD ™ Video Display Procedure:1. Repeatedly press the Selector button (remote or panel buttons) to

select IPOD.

2. Connect the TV to the rear video output jack. “No IPOD connected”should be displayed on the TV screen.

3. Turn the IPOD on, enable video slideshow from its menu and play a video image.

4. Dock (plug) the IPOD into the Panasonic receiver. If it is the acceptable model (partial list at the right), the No Ipod display will be replaced by a music menu. If this does not automatically appear, press the remote’s SETUP button.

5. The Panasonic remote Up/Dwn buttons permit you to navigate through the IPOD menu. The OK and RETURN buttons permits you to select the next or previous IPOD menu page.

IPOD Power

IPOD Audio and Video

1. Once an IPOD is docked, the IPOD grounds CN6003/pin 4.

2. Micro IC2001 receives this ground and switches IC6602 on to deliver 5Vdc from CN6003/pin 8 to charge the IPOD.

1. IPOD models listed above output UART communications when docked.

2. Micro IC2001 replies so the IPOD can unmute the audio and video ports. Some IPOD security variations require you to enable the IPOD video first before docking.

(from the SA-PT770 owner’s manual)

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