3-28
ELECTRICAL TROUBLESHOOTING GUIDE
No AMP output
Check PFC P.CTL from
μ
-com.
Check AMP P.CTL from
μ
-com.
Replace D908, Q955, PC903.
Replace D908, Q956, PC902.
Replace F911.
Check or replace
IC904, Q907 ~ Q910.
Check or replace IC902
and check Q911 ~ Q914 gate(Pin2)
components (Resistors, Diodes).
Q911 ~ Q914 OK?
Replace Q911 ~ Q914.
Check or replace D953 ~ D956.
Check line of MAIN PCB is short or not.
Is the
C904, C905 voltage
about 380 V?
F911 normal?
PFC P.CTL OK?
AMP P.CTL
OK?
Is the
VCC 12 V supplied to
IC904 Pin16?
Is the
VCC 12 V supplied to
IC902 Pin8?
NO
YES
NO
NO
NO
NO
YES
NO
YES
YES
YES
YES
NO
NO
Содержание CM9550
Страница 15: ...2 2 ...
Страница 19: ...LED SUB LED MAIN A60L A61 A62 651 652 4 SPEAKER SECTION 4 1 FRONT SPEAKER NS9550F LEFT SPEAKER ...
Страница 20: ...LED SUB LED MAIN A60R A61 A62 651 652 FRONT SPEAKER NS9550F RIGHT SPEAKER ...
Страница 21: ...LED SUB LED MAIN A91 A90 952 952 A92 951 4 2 SUBWOOFER SPEAKER NS9550W ...
Страница 61: ...3 40 ...
Страница 81: ...3 79 3 80 3 MAIN P C BOARD TOP VIEW ...
Страница 82: ...3 81 3 82 4 MAIN P C BOARD BOTTOM VIEW ...
Страница 83: ...3 83 3 84 5 FRONT VOLUME MIC PORTABLE P C BOARD TOP VIEW ...
Страница 84: ...3 85 3 86 6 FRONT VOLUME MIC PORTABLE P C BOARD BOTTOM VIEW ...