mb35 training
TRANSCRIPT
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VESTEL Technical Support & Training
INVERTERBoard
LVDSCable
Key Board
PW26 or PW01 Power Supply
Board
IR & LEDBoard
MB35 MainBoard
Panel Control Board
INTRODUCTION OF BOARDS
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Batch numberYear
Consecutive number
Product Code
Consecutive number
IDENTIFICATION OF PRODUCTION CODE
VESTEL Technical Support & Training
Year
Month
Year
From the beginning of September.2002, the production month and year will be indicated
inside the box as shown.
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DDRAM
8V Reg.
PowerSocket
Serial Flash
IDTV 2.6V reg.
Mpeg Decoder
SDRAM
IDTVSerial Flash
Video Filter
ST-By microcontroller
ST-By Reset IC
1.26V reg.
MSTAR uC.
Audio Amp.
Audio P.Amp.
1V8 Reg.
DVB/YPbPr Switch
AGC Switch
HDMI IC
VGA Eeprom
HDMI-3 Eeprom
Main Eeprom
Scart1 Op-amp.
SUBW. OP.amp
Scart 2 OP.amp
Scart Programenable switch
Tuner 5V Reg.
Headphone Amp.
St-By micro Programmingsocket
LVDS Socket
KeyboardSocket
Led & IR Socket
Left & Right Speaker Sockets
Program Debug Socket
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U149
X105
U139
X102
U104U137
U134U144U114
U132
U142
U101
U138
U111
U124
U119U103
U118
U117U127
U110 U112
U133
U121 U122
U129 U115
U128
X104
U123
U113
U130
U146
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17MB35 Power Connector “CN117”
24V_VCC RunAudio_Amp.Supply
OPTIONAL
3V3_VCC Run1V8 PANEL_SUPPLY
3V3_VCC St-by
5V_VCC Run1V8_VCC1V0_VCC
PANEL_SUPPLY
12V_VCC Run
5V_VCC St-by
A/D_DIMMING_SELECTION
33V_VCC Run TUNER_Supply
12V_VCC RunAudio_Amp.Supply
OPTIONAL
DIMMING Run_0V....3V3
BACKLIGHT_ON/OFFRun 3V3
St-by_KontrolSt-By=3V3
Run=0V
Key board
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TUNER Analog IF Output
MSTAR IC Analog TUNER
IF Input
17MB35 Analog TUNER Circuit “ANALOG IF”
AGC ve I²C Switch IC
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17MB35 Digital TUNER Circuit
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Controller
17MB35 Controller IC
STBY_ON\OFFoutput
LED control outputs
14.3 MHz X’tal
Scart 1_PIN8Scart 2_PIN8
BACKLIGHT_DIMControl output
SCLSDA
TX/SDARX/SCL
IR INPUT
PROTECTinput
NVM_WP
HW RESET
RESETIC
MUTE output
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17MB35 LVDS Interface
LVDS Socket
U138 IC
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17MB35 MSTAR IC “ Block Diagram “
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17MB35 Analog Inputs / Outputs SCART-1
TX/SDA (For SW
uploading)
RX/SCL (For SW
uploading)
S-VHS Input
VGA Input 15 PIN D-SUB Connector
SCART-2
VGA DDC EEPROM
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Pow
er S
ocke
tC
N11
7
DCDC
3V3_STBY 1V26_STBY
DCDC
12V_VCC 2V6_VCC
LDO8V_VCC
LDO1V8_VCC
SW3V3_VCC
3V3_STBY
24V_VCC
LDO5V_TUNER
5V_VCC
SW
5V_VCC
12V_VCC
PANEL_VCC
DC
DC
1V_VCC (for Pix.)
17MB35 POWER MANAGEMENT
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Power Connector
17MB35 POWER CIRCUITS
IDTV Supply
1V26_STBY Supply
8V_VCC Supply
Short Circuit Protection
PANEL supply
1V8V_SUPPLY
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17PW26 POWER SUPPLY BOARD
AC INPUT
PFCPOWER FACTOR
CORRECTION
STANDBY CIRCUIT
HALF BRIDGE CIRCUIT
OUTPUT RECTIFIER“
OU
TPU
T R
ECTI
FIER
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17PW26
GENERAL FEATURES :• Supporting between 26” to 42” Screen size• Output power :
– 26”- 32” 160W– 37”- 42” 230W
• Output Voltages : 3.3V, 5V, 12V, 24V, 33V• Supprted chassis : 17MB35 ve 17MB25• Input voltage limits : 170-270V AC
(optional 90-270V)
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Active PFC
Half Bridge Circuit
Output diodes
Standby Circuit
Control Circuit
Output diodes
Supply Voltages
Stand by voltages
BLOCK Diagram
17PW26
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17PW26
12,8
0
3,39
Power ON Condition STAND BY Condition
5,11
24,7
24,7
24,7
3,39
3,39
5,08
12,08
3,393,39
5,08
3,3
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+12V from control windingof st-by Transformer
St-by supply voltage+3.3VSTBY
+12 VPFC ICSupply voltage
IC830 main SMPS ICSupply voltage +12V
St-by control Voltage fromMain board(3.3V during st-by)
7.44V 1 2
34
6.76V
0.00V13.30V
E11.44V
B11.44V
C0.00V
3.3V
STANDBYCONDITION
17PW26 STANDBY Control Circuit
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POWER ONCONDITION
1.19V 1 2
34
0.05V
0.00V0.00V
E11.40V
B11.10V
C10.14V
0.0V
17PW26 STANDBY Control Circuit+12 VPFC ICSupply voltage
IC830 main SMPS ICSupply voltage +12V
+12V from control windingof st-by Transformer
St-by supply voltage+3.3VSTBY
St-by control Voltage fromMain board(0 V during ON condition
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17PW26 STANDBY Circuit+3.3V St-by
voltage
+5V St-by voltage
Regulation feedback
input
From ~ 400V output Diodes
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• Generating 24V and 12V supply voltages
DC Output Circuit
17PW26
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• Generating 5V Vcc voltage from 12V via Step-Down circuit
5V Vcc Circuit
17PW26
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• St-by circuit take feedback from +3.3VSTBY,• Half Bridge circuit take feedback from +24V’
Feed Back Circuits
17PW26
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17PW26 PFC “POWER FACTOR CORRECTION“
~ 300VInput
sampling voltage Q803 current
sampling
~ 400V Output Diodes
BULK CAPACITOR
Q803 switching
MosfetCurrent
voltage
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17PW01
HALF BRIDGE CIRCUIT
PFCPOWER FACTOR
CORRECTION
OUTPUT RECTIFIER
STANDBY CIRCUIT
AC INPUT
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GENERAL FEATURES:• 42” SLIM PSU• Output Power : 230W• Output Voltages ; 3.3V, 4.2V, 5V, 12V, 24V,
33V• Supported chassis : 17MB35 • Input voltage limits : 170-270V AC• 150mW standby power consumption• Similar circuit using with 17PW26
17PW01
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+24V INVERTER voltage feedback
input
17PW01 “ MAIN SMPS “
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17PW01 “ DC Output Voltages “
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17PW01 +5V Circuit
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17PW01 VCC_3V3_ON Circuit
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17MB35 Trouble Shooting “Flowchart”
MB35 Doesn’t work
Is this TVUT SLIM type?
CheckU149 supply voltaje
and X105
Yes No
No
Change defected component
Yes
Is there St-By Voltages?
Check Power Supply
Board
No
Yes
CheckX104 ?
Check 3.3V, 5V, 12V
Voltages?
Upload new software,if not achieve, change U138
Yes
Yes
Check Power Supply
Board
No
NoChange defected
component
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17MB35 Trouble Shooting “Flowchart”
No PictureSound is OK.
Check pin-22 of CN117is there 3.3V?
CheckInverter and its
Connection cable
Yes
NoNo Change defected
component
Yes
Check Panel VCCOn LVDS socket
CN108-Pin-2,4,6,8CN105-Pin-18,20,22,24,26,28
Change LVDS cable
No
Yes
CheckQ104 in-out
Voltage? İs it OK?
Upload new software,if not achieve, change U138
Yes
NoChange defected
component
Change U138
CheckLVDS cable
is it OK?
No
YesChange Panel
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17MB35 Trouble Shooting “Flowchart”
NO Pictureand/or sound
On HDMI inputs
İs HDCP Key Loaded?
Yes
No Load HDCP key With DB07 prg.board
is the problem onHDMI-3 ? Change U138
No
Yes
is the problem onHDMI-1 or 2 or 4 ?
Upload new software,if not achieve, change U138
Yes
No
Change U133