Diagnostic software descriptions and troubleshootingDVD612 /XX15.GB 33
5.9Troubleshooting
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 30241
PM3380B
NO SOUND OUTPUTch1
ON AUDIO CINCH
START1005B/C AND SINGLE
SCART 1002
1
CH11.00V~MTB500usch1+
TP13: ANALOG OUTPUT AUDIO L/R
!To activate the "Player Script ",press Open/Close and
ACTIVATEStop keys on the local keyboard of the DVD player
DIAGNOSTIC SOFTWAREsimultaneously.
? PLAYER SCRIPT ?!Proceed to the nuclei "AudioPinkNoise" by pressing
NEXT key until display shows "APP SND-1" and
seconds later it show " Scart DVD "
NO!Check supply voltages at connector 1010
Pin 9 -> -5Vstdby
CHECK
POWER SUPPLY!Pin 10/11-> +5V
!Check 3V3 regulator 7203 and safety resistor 3209 ,
3V3_A and 3V3_B
TO DAC ?3237
!Check the delay cct 7512 , 3238 , 3239 , 2237
!Check the Flex cable to connector 1010
!Check Mono Board
YES
NO
CHECK
AUDIO I2S!Check I2S signal at testpoints 7 , 8 , 9 , 10
!Check the Flex cable to connector 1010
SIGNAL TO DAC
?!Check Mono Board
YES
NO
CHECK
DAC OUTPUT!Check Vref-DAC on Pin 12 of DAC IC 7200 1V6
AT TP12!Check for malfunction of DAC IC 7200
?
YES
NO!Check audio signal at TP 13
!Check KILL signal at Pin 12 connector 1010
CHECK!Audio mute OFF -8V ? 10%
AUDIO CINCH!Check for malfunction of KILL transistor 7501 , 7502 ,
AND SCART7506 ,7507
OUTPUT ?!Check ? 5V supply to OP-AMP 7201
!Check gain configuration of OP-AMP 7201
!Check for malfunction of OP-AMP 7201
!Check Mono Board
YES?
SOUND ON
AUDIO CINCH & SCART
ENDOK
CL 16532007_020.eps
130201 |
ACEC
