No sound
No sound
No sound in AC-3./5.1
NORMAL state
sound is ok in AC-3 state,
but no sound in AUX stereo
check whether the vice-level
I alternating voltage8V
of transformer is ok or not.
replace the
transformer
check whether the 1IC4052
power voltage 5.1V is ok or
not.
check whether the current
transfer output voltsd. is ok
or not.
check whether the
capacitor 2CD3,
IC 7805 are ok or not.
judge whether the 1IC10 4558,
is ok or not by inputing signal
replace 1IC10
4558,
check whether the power
voltage 5.1V of 1IC3,1IC4,
4053 are ok or not.
check whether
the 2CD4are ok or
not.
NOT
NOT
NOT
NOT
NOT
OK
OK
OK
TROUBLE SHOOTING AND RESOLUTION
1
2
4. TROUBLE SHOOTING GUIDE
SERVICE MANUAL
5
Check whwther 2CD11,
2CD12 are ok or not
replace 2CD11,
2CD12
NOT
judge whether 1C3,-IC4
are ok or not
NOT
OK
replace IC3,IC4
check whether the
capacitor 2CD3,
IC 7805 are ok or not.
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