Advertisement
Diagnostic software descriptions and troubleshooting
VIDEO PART OF AUDIO/VIDEO BOARD 3139 243 30161
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 &
1001 ?
YES
CHECK
CVBS CINCH
OUTPUT AT
CONN 1008A ?
YES
CHECK
Y/C OUTPUT AT
CONN 1003
YES
CHECK
YUV OUTPUT AT
CONN 1006
YES
VIDEO PART
END
OK
NO
?
NO
NO
NO
?
NO
?
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 1001
Pin 9 -> -5Vstdby
Pin 10/11 -> +5V
Check 3V3 regulator 7010 and safety resistor 3213 ,
3229
Check the delay cct 7456 , 3230 , 3231 , 2231
Check the Flex cable to connector 1001
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 1001 & 1000
Check Mono Board
Check CVBS signal at testpoint 14
Check for ±
5V supply to Video buffer amplifier
Check for malfunction of Video buffer amplifier 7411,
7412 , 7413 , 7414 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 7407,
7408,
7410, 7457, 7458, 7455 and the biasing
configuration
Check YUV signal at TP 17, TP18 and TP19
respectively
Check for ±
5V supply to OPAMPS 7001 and transistor buffer
7415
Check for malfunction of OPAMPS 7001 and
transistor buffer 7415
DVD703 /XX1
5.
CL 16532007_017.eps
070201
GB 35
Advertisement
