
3-8
16. USB PART
NO
NO
Check “CHECKING”
or “USB” display
YES
OK
Check Power supply circuit
Q316 USB+5V
Turn on the USB
Check connector locking
CN401, CN705
NO
NO
NO
Check reading
YES
Check CN705
pin3, 4 (D+, D-)
Check CN401
pin2_5V
NO
NO
Playing,
Check audio output
YES
Check U503 pin3, 4
Check U703
pin55, 57
YES
NO
NO
Check SMPS power
supply
NO
Check Power supply
circuit Q308
Check Power supply
circuit Q302
Check F301
YES
Replace Q308
YES
Replace Q302
YES
Replace F301
NO
Check MICOM IC603
pin116, 117 (D+, D-)
Содержание SB74
Страница 9: ...2 3 2 4 ...
Страница 11: ...2 6 ...
Страница 25: ...3 14 WIRING DIAGRAM JK500 3P 13P CN501 CON2 2P SPK 2P 5P 8P 5P 3P CN580 24P 9P ...
Страница 26: ...3 15 BLOCK DIAGRAM ...
Страница 27: ...3 16 ...
Страница 34: ...PRINTED CIRCUIT BOARD DIARGAMS 1 1 MAIN P C BOARD DIAGRAM TOP VIEW 3 29 3 30 ...
Страница 35: ...1 2 MAIN P C BOARD DIAGRAM BOTTOM VIEW 3 31 3 32 ...
Страница 37: ...3 1 MCU9800 P C BOARD DIAGRAM TOP VIEW 3 35 3 36 ...
Страница 38: ...3 2 MCU9800 P C BOARD DIAGRAM BOTTOM VIEW 3 37 3 38 ...
Страница 39: ...4 FRONT P C BOARD DIAGRAM 5 CD JACK P C BOARD DIAGRAM 3 39 3 40 ...