Yes
No
Yes
No
Yes
No
Connection and soldering of head
wire normal
Replace JIC301(KA22291)
Voltage at
JIC301(KA22291) are normal
(Refer to Schematic
Diagram)
Check power supply circuitry
Noise occurs at
pin3,22 with volume
control at mid position
Noise occurs at pins1,24
Check function selector
section
No
Yes
Yes
Yes
No
Speaker connections are normal
all pins of AIC601(TA8207)
are normal (Refer to Schematic
Diagram)
Voltage at base of QQ503,
QQ553(C945) is
less than
0.6V
Pattern & Speaker Jack normal
Check power supply section
Check Muting circuitry
Voltages to
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