No 12 V
Is Vcc
(15 V) supplied to Q953
collector?
Check or replace D921.
YES
YES
NO
Is the
13 V Supplied to Q953
base?
Check P-CTRL “H” signal
from
μ
-COM.
YES
NO
Check or replace Q953.
No 5 V
Is Vcc
(6 V) supplied to IC951
Pin1?
Check or replace D923.
YES
YES
NO
Check
IC951 Pin4 "H".
Check P-CTRL
“H”’ signal from
μ
-COM.
YES
NO
Check or replace IC951.
3-18
AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE
Summary of Contents for CM4330
Page 13: ...1 12 MEMO ...
Page 15: ...2 2 MEMO ...
Page 19: ...A60 4 SPEAKER SECTION 4 1 FRONT SPEAKER CMS4330F ...
Page 51: ...3 32 MEMO ...
Page 66: ...3 61 3 62 2 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Page 67: ...3 63 3 64 3 FRONT P C BOARD TOP VIEW BOTTOM VIEW ...