3-15
MAIN ELECTRICAL TROUBLESHOOTING GUIDE
3. RF/SERVO CIRCUIT
Laser off
Check the RFL connection
between J401 and MT1389.
Put Disc in.
NO
Check the related circuit on
MT1389 RFL signal .
NO
Disc ID is correct?
Proper RFL signal
on MT1389?
NO
YES
YES
YES
Check the cable connection
between spindle and main PCBA.
Check DMSO related circuit
on MT1389.
NO
Does spindle rotate.
Proper DMSO signal
on MT1389
NO
YES
Replace IC(U201)
YES
D
YES
Содержание DP270B
Страница 15: ...3 6 MEMO ...
Страница 17: ...3 9 3 10 PRINTED CIRCUIT DIAGRAM TOP VIEW BOTTOM VIEW MEMO ...
Страница 28: ...3 21 FIG 3 3 FIG 3 4 F U401 PIN8 F U401 PIN8 FE U201 PIN26 FE U201 PIN26 RFL U201 PIN21 RFL U201 PIN21 ...
Страница 33: ...3 26 WIRING CONNECTION DIAGRAMS 1 WIRING CONNECTION DIAGRAM 1 MAIN PCB LCD PCB MAIN PCB MAIN PCB ...
Страница 34: ...3 27 2 WIRING CONNECTION DIAGRAM 2 MAIN PCB KEY PCB MAIN PCB Key PCB ...
Страница 51: ...3 55 3 56 1 MAIN P C BOARD TOP VIEW PRINTED CIRCUIT DIAGRAMS ...
Страница 52: ...3 57 3 58 MAIN P C BOARD BOTTOM VIEW ...
Страница 53: ...3 59 3 60 2 KEY MENU P C BOARD TOP VIEW BOTTOM VIEW 3 KEY FRONT P C BOARD TOP VIEW BOTTOM VIEW ...