3-17
MAIN ELECTRICAL TROUBLESHOOTING GUIDE
Check Audio filter, amplify,
mute circuit.
Check Aout_L related circuit
Aout_R
NO
Normal
Audio output when
disc playback.
Proper
Aout_L, Aout_R signal
on MTK1389
NO
Check the related circuit of
Audio DAC.
NO
YES
YES
Check communi cation lines
on MT1389
NO
Normal
IR. VFD & Front pannel
key functions.
Commu-
nications between
IR.VFD Front pannel key &
MT1389 & Front µ-com
is normally.
NO
NO
YES
Check the cable connection
on Front pannel.
TEST END
YES
E
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 ...
