3-2
ELECTRICAL TROUBLESHOOTING GUIDE
1. Power check flow
No 3.4VA.
No 3.4VA
Is 3.4VA section working?
Is 3.4V present at emitter
of Q121?
Replace Q121.
Replace IC101.
Is there a DC voltage at
Cathode of D105 or D107?
Check FR101
No 5V
Is 3.4VA section working?
Replace Q126.
Is 5.6V present at collector
of Q126?
NO
NO
YES
YES
YES
Check D105/D106/D107/
D108 and replace.
YES
YES
A.
B.
NO
NO
NO
Содержание DV140
Страница 25: ...3 15 FIG 7 2 DVD FIG 7 3 CD F F FE FE RFL RFL...
Страница 26: ...3 16 FIG 7 4 CD 8 FOCUS ON WAVEFORM FIG 8 1 DVD FE FOSO F F F FE RFL...
Страница 28: ...3 18 10 TRACKING CONTROL RELATED SIGNAL System checking FIG 10 1 DVD FIG 10 2 CD TE TRSO T T TE TRSO T T...
Страница 30: ...3 20 2 COMPOSITE VIDEO SIGNAL FIG 13 2 13 AUDIO OUTPUT FROM AUDIO DAC FIG 13 1...
Страница 37: ...3 28 3 29 2 AV JACK CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Страница 38: ...3 30 3 31 A B C D E F G H I J K L M N O P Q R S T 3 SYSTEM CIRCUIT DIAGRAM...
Страница 39: ...3 32 3 33 4 DRIVER CIRCUIT DIAGRAM CD DVD LD will not on A B C D E F G H I J K L M N O P Q R S T...
Страница 40: ...3 34 3 35 5 TIMER CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Страница 42: ...3 38 3 39 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE...
Страница 44: ...3 42 3 43 4 SMPS P C BOARD 360mm ONLY LOCATION GUIDE 430mm ONLY...
Страница 45: ......
