
3-9
NO
NO
YES
YES
Check the laser power circuit
on MT1389S and connecting
to power transistor.
Check cable connection
between transistor ouput
and pick-up head.
NO
Laser off
NO
NO
YES
Check the related circuit
on MT1389S RFL signal.
Check LDO1 & LDO2 signal
YES
YES
NO
NO
YES
Check DMSO related
circuit on MT1389S.
NO
YES
Check the spindle control
amp circuit of motor driver.
Check the cable
connection between spindle
and main PCBA.
YES
YES
Laser turns
on when reading
disc?
LD01 or LD02
output properly?
NO
Check the related circuit on
laser power transistor.
Collector
voltage of power transistor
is OK?
Put disc in?
Disc ID is
correct?
Does
spindle rotate?
Proper
DMSO signal on
MT1389S.
SP+ & SP-
output properly?
Proper
RFL signal on
MT1389S?
C
D
ELECTRICAL TROUBLESHOOTING GUIDE
Содержание T517AHT
Страница 9: ...1 8 MEMO...
Страница 30: ...3 17 FIG 7 2 DVD F FE RFL FIG 7 3 CD F FE RFL...
Страница 31: ...3 18 FIG 7 4 CD F FE RFL 8 FOCUS ON WAVEFORM 27 28 29 30 27 28 29 30 FE FOSO F F IC601 FIG 8 1 DVD...
Страница 35: ...3 22 13 AUDIO OUTPUT FROM MT1389S FIG 13 1...
Страница 36: ...3 23 CONNECTOR PICTURE 1 ALL CONNECTOR PICTURE...
Страница 37: ...3 24 2 MAIN BOARD CONNECTOR PICTURE...
Страница 38: ...3 25 CN201 MD 23PIN 3 CN201 CONNECTOR PICTURE CN202 MD 9PIN 4 CN202 CONNECTOR PICTURE...
Страница 39: ...3 26 CN602 POWER 10PIN 6 CN602 CONNECTOR PICTURE CN601 Front 12PIN 5 CN601 CONNECTOR PICTURE...
Страница 40: ...3 27 CN604 USB 4PIN 7 CN604 CONNECTOR PICTURE CN605 KARAOKE 4PIN 8 CN605 CONNECTOR PICTURE...
Страница 41: ...3 28 CN705 5 1ch 12PIN 9 CN705 CONNECTOR PICTURE...
Страница 49: ...3 37 3 38 2 MPEG CIRCUIT DIAGRAM...
Страница 50: ...3 39 3 40 3 SERVO CIRCUIT DIAGRAM...
Страница 51: ...3 41 3 42 4 JACK CIRCUIT DIAGRAM...
Страница 52: ...3 43 3 44 5 SCART CIRCUIT DIAGRAM OPTION...
Страница 53: ...3 45 3 46 6 USB CIRCUIT DIAGRAM 7 KEY CIRCUIT DIAGRAM...
Страница 54: ...3 47 3 48 8 TIMER CIRCUIT DIAGRAM...
Страница 57: ...3 53 3 54 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD TOP VIEW BOTTOM VIEW...
Страница 59: ...3 57 3 58 5 SCART P C BOARD OPTION TOP VIEW BOTTOM VIEW 6 USB P C BOARD TOP VIEW BOTTOM VIEW...
Страница 65: ...4 6 MEMO...
Страница 67: ...4 9 4 10 MEMO MEMO...