background image

LCD Panel

Module

(LED 

Backlight)

Power Supply Part

IC7503

IC7301

8

Start

Vcc

5

T7301

Q7301

6

D7303
R7342

-44

16V

2

PC7301

feedback

10

9

STB5.3V

IC7501

EN

HV

VCC

DRV

FB

Q7510

P2

P16.3V

SUB-ON

VCC

Q7502

D7507
C7502

D7502
C7512

3

LED

Drive

IC7800

BL-ON

(Hi=enable)

Q7801

L7806/07

4

Anode

Cathode

Vcc

1

Panel-PWM

Q7803

9

10

8

Panel-PWM

Bright

Dark

Lighting Period

OFF

0V

D7102

Rectifier

14

BL-SOS

(1 blink)

SUB3.3V

Power Supply Distribution (1/2)

(TNP4G573**)

L7502

D7317
C7513

L

O

G

I

C

4

CF7101

F7101

OFF/STB=38V

ON= 71V

1st

2nd

3rd

6th

7th

13th

14th

15th

(2

nd

)

1-3

5-8

D7800
C7817

38V

IC7301 automatically starts working after AC plug in. (always working from          to         )

IC7800 starts working after input Vcc and BL-ON/Panel-PWM signal.

4th

1st

14th

VLED

The power on sequence is describe by the number of the symbol. (       -

)

1st

15th

2nd

Содержание Viera TH-32A400G

Страница 1: ... 2014 Unauthorized copying and distribution is a violation of law c Hints for Board Repair 32inch 1 board model Order No ITD1412904GE Model No Ver 1 0 TH 32A400G K T X V TH 32A405D TH 32A408K TH 32A409K TH 32A410D G K M X V 1 ...

Страница 2: ...al Video Processor Resize MIX I P conv Pixel conv AI Gamma OSD AMP IC4900 V Y Pb Pr A12 Demod SPI ROM IC8901 A10 USB HDMI Audio I F Signal Flow TNP4G573 Component Video A21 LED Remote K Board DEMOD IC6750 Antenna EEPROM IC8902 IF 2 ...

Страница 3: ...e defective How to enter While pressing volume button of the TV unit press option button of the remote control 3 times within 2 seconds How to exit Disconnect AC plug A IC8001 RTK2644 Resize IP conv LCD Panel LCD Panel Module T CON Test Pattern The test pattern is created by the circuit in LCD Panel Module T CON board No Yes Is the picture of all Input Source NG Check by LCD Panel Test Mode Check ...

Страница 4: ...PWM Q7803 9 10 8 Panel PWM Bright Dark Lighting Period OFF 0V D7102 Rectifier 14 BL SOS 1 blink SUB3 3V Power Supply Distribution 1 2 TNP4G573 L7502 D7317 C7513 L O G I C 4 CF7101 F7101 OFF STB 38V ON 71V 1st 2nd 3rd 6th 7th 13th 14th 15th 2nd 1 3 5 8 D7800 C7817 38V IC7301 automatically starts working after AC plug in always working from to IC7800 starts working after input Vcc and BL ON Panel PW...

Страница 5: ..._3 3V 3 3V IC8709 3 TNR1 8V SITU_1 8V 1 8V IC8705 3 DDR1 8V DDRV 1 8V IC8707 4 4 3 3 4 SPI IC8901 EEPROM IC8902 8 8 TNP4G573 STB3 3V STB_M3 3V V33AMAIN ETN_3V3 V33IO V33LVDS USB_Pwr IC5602 JK8601 USB 1 1 6 AMP IC4900 2 3 A21 To LCD Module T CON 27 30 12V IC8300 2 PNL12V L8300 PANEL12V_ON VCCK1 1V V11CORE 1 1V IC8700 L8700 2 EN Tr x2 Q8002 Tr KEY3 122 SUB ON EN 110 56 BL ON Panel PWM 64 STBRST 131 ...

Страница 6: ...P16 3V line Power IC of Defective line Check short circuit of each power line SUB5V SUB3 3V DDR1 8V VCCK1 1V PNL12V TNR3 3V TNR1 8V F7101 CF7101 Q7301 IC7301 D7317 D7502 IC7503 IC7503 IC8708 check short circuit of STB power line OK NG Check input voltage of IC7503 16V and Check VLED voltage 38V at P2 3pin If all output voltages are OK IC8001 NG Check by power on sequence from to 1st 13th 3rd 4th 2...

Страница 7: ...f Power On Problem 2 2 Check short circuit of Q7801 7803 Voltage Check of VLED Just before shutdown rise up from 38V to 71V IC7800 Keep 0V Rise up Not 0V Voltage Check of PWM Signal input pin4 of C7800 Just before shutdown IC8001 OK 71V NG 38V or lower LCD Panel 7 ...

Страница 8: ...Parts Change Note 1 Add zener diode DZ2J068M0L to pad of C8759 no use POLARITY MARKING 8 ...

Страница 9: ...2 Add surge absorber D4EDY5R5A038 to pad of C8782 no use 3 Add surge absorber D4EDY5R5A038 to pad of C8707 no use 9 ...

Страница 10: ... CF7101 Q7301 D7507 D7102 D7502 IC7503 STB5V IC7800 Q7801 Q7803 Q7510 D7800 P2 A10 IC8708 STB3 3V L8700 Left side VCCJ1 1V L8702 Left side SUB5V L8300 Left side PNL12V A21 IC8707 DDR1 8V IC8711 SUB3 3V IC8705 TNR1 8V IC8709 TNR3 3V 10 ...

Страница 11: ...Revision History Version Issued Revised date Revised content Ver 1 0 11 Dec 2014 First version 11 ...

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