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GB 34
5.
DVD733K /691/781
VIDEO PART OF AUDIO/VIDEO BOARD 3139 243 30261
START
NO PICTURE
CVBS , Y/C , YUV
ACTIVATE
DIAGNOSTIC SOFTWARE
" PLAYER SCRIPT "
CHECK
POWER SUPPLY
±5V AND 3V3
YES
CHECK
VIDEO INPUT AT
CONN 1000 &
YES
CHECK
CVBS CINCH
OUTPUT AT
CONN 1005A ?
YES
CHECK
Y/C OUTPUT AT
CONN 1003
YES
CHECK
YUV OUTPUT AT
CONN 1006
YES
VIDEO PART
END
Diagnostic Software Descriptions And Troubleshooting
NO
?
NO
1010 ?
NO
NO
?
NO
?
OK
=>
To activate the "Player Script ",press Open/Close and
Stop keys on the local keyboard of the DVD player
simultaneously.
=>
Proceed to the nuclei "VideoColDencOn" by pressing
NEXT key until display shows "APP PIC-1"
=>
Check supply voltages at connector 1010
Pin 9
-> -5Vstdby
Pin 10/11 -> +5V
=>
Check 3V3 regulator 7203 and safety resistor 3209 ,
3237
=>
Check the delay cct 7512 , 3238 , 3239 , 2237
=>
Check the Flex cable to connector 1010
=>
Check Mono Board
=>
Check video signal at TP1 B_Vid , TP2 G_Vid
TP3 R_Vid , TP4 CVBS , TP5 C , TP6 Y
=>
Check the Flex cable to connector 1000 & 1010
=>
Check Mono Board
=>
Check CVBS signal at testpoint 14
=>
Check for ±5V supply to Video buffer amplifier
=>
Check for malfunction of Video buffer amplifier 7508,
7509 , 7510 , 7511 and the biasing configuration
=>
Check Y /C signal at TP 16 and TP15 respectively
=>
Check for ± 5V supply to Video buffer amplifier
=>
Check for malfunction of Video buffer amplifier 7413,
7414,7415,7416,7417,7418 and the biasing
configuration
=>
Check YUV signal at TP 17, TP18 and TP19
respectively
=>
Check for ±5V supply to transistor buffer and
amplifier circuitry 7419,7420,7421,7422,7423,7424,
7425,7426,7427
=>
Check for malfunction of transistor buffer and
amplifier.
CL 16532007_113.eps
090501
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