2-8
NO
NO
Check the laser power circuit
on MT1389L and
connecting to power
transistor(Q403, Q405).
YES
YES
YES
YES
YES
YES
Check cable connection
between transistor output and
pick-up head.
Laser off.
Check the RF connection
between AM5890 and MT1389L.
YES
YES
DVDLD or
CDLD output
property?
Check the related circuit on
laser power transistor.
NO
NO
Collector
voltage of power transistor
is OK?(Q403, Q405)
Laser
turns on when
reading disc?
Put disc in?
Check the cable connection
between spindle and main
PCB.
YES
YES
Check the spindle control AMP
circuit of motor driver.
SPNP
SPNN output
properly?
NO
Check the SPINDLE related
circuit on MT1389L.
Proper
SPINDLE signal on
MT1389L.
Does spindle rotate?
NO
Check the related circuit on
MT1389L RF signal.
NO
NO
NO
Proper
RF signal on
MT1389L.
Disc ID is correct?
C
D
Содержание HT356SD
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Страница 45: ...PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD DIAGRAM TOP VIEW 2 45 2 46 ...
Страница 46: ...MAIN P C BOARD DIAGRAM BOTTOM VIEW 2 47 2 48 ...
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Страница 54: ...3 7 2 PASSIVE SUBWOOFER SH36SD W A900 950 951 952 ...
Страница 55: ...3 8 ...