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Diagnostic Software Descriptions And Troubleshooting
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
PIC-1. See description in the chapter of "DIAGNOSTIC
SOFTWARE: SCRIPT INTERFACES".
AUDIO PART OF AUDIO/VIDEO BOARD 3139 243 30261
NO SOUND OUTPUT
START
ON AUDIO CINCH
ACTIVATE
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
SOUND ON
END
AUDIO CINCH 1005
1005B/C
NO
CHECK
TO DAC ?
NO
CHECK
AUDIO I2S
?
NO
CHECK
AT TP12
?
NO
CHECK
?
OK
DVD733K /691/781
PM3380B
ch1
1
CH11.00V~MTB500usch1+
TP13: ANALOG OUTPUT AUDIO L/R DURING NUCLEI " AudioSine "
=>
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 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 I2S signal at testpoints 7 , 8 , 9 , 10
=>
Check the Flex cable to connector 1010
=>
Check Mono Board
=>
Check Vref-DAC on Pin 12 of DAC IC 7200 1V6
=>
Check for malfunction of DAC IC 7200
=>
Check KILL signal at Pin 12 connector 1010
Audio mute OFF -> -8V ± 10%
=>
Check for malfunction of KILL transistor 7501 , 7502 ,
7506 ,7507
=>
Check ± 5V supply to OP-AMP 7201
=>
Check gain configuration of OP-AMP 7201
=>
Check for malfunction of OP-AMP 7201
=>
Check Mono Board
5.
GB 31
CL 16532007_111.eps
090501
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