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GB 32
5.
DVD703 /XX1
5.9
Troubleshooting
5.9.1
Troubleshooting A/V board
Testing of A/V board can be done using diagnostic software
"PLAYER SCRIPT".
MONO board is used to generate a sound with the sound
tests SND-1 and SND-2 or a VIDEO signal with the picture
"DIAGNOSTIC SOFTWARE: SCRIPT INTERFACES".
AUDIO PART OF AUDIO/VIDEO BOARD 3139 243 30161
NO SOUND OUTPUT
START
ON AUDIO CINCH
DIAGNOSTIC SOFTWARE
" PLAYER SCRIPT "
POWER SUPPLY
3V3_A and 3V3_B
YES
SIGNAL TO DAC
YES
DAC OUTPUT
YES
AUDIO CINCH
OUTPUT-> TP 13
YES
END
AUDIO CINCH 1008
Diagnostic software descriptions and troubleshooting
1008B/C
ACTIVATE
NO
CHECK
TO DAC ?
NO
CHECK
AUDIO I2S
?
NO
CHECK
AT TP12
?
NO
CHECK
?
SOUND ON
OK
PM3380B
ch1
1
CH11.00V~MTB500usch1+
TP13: ANALOG OUTPUT AUDIO L/R
To activate the "Player Script ",press Open/Close and
Stop keys on the local keyboard of the DVD player
simultaneously.
Proceed to the nuclei "AudioPinkNoise" by pressing
NEXT key until display shows "APP SND-1" and
seconds later it show " Scart DVD "
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 I2S signal at testpoints 7 , 8 , 9 , 10
Check the Flex cable to connector 1001
Check Mono Board
Check Vref-DAC on Pin 12 of DAC IC 7011 1V6
Check for malfunction of DAC IC 7011
Check KILL signal at Pin 12 connector 1001
Audio mute OFF -> -8V ± 10%
Check for malfunction of KILL transistor 7451 , 7452 ,
7453 ,7454
Check ± 5V supply to OP-AMP 7012
Check gain configuration of OP-AMP 7012
Check for malfunction of OP-AMP 7012
Check Mono Board
CL 16532007_012.eps
130201
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