9
5
6.
Make C713/C714 open. Multimeter is at band R
Χ
1K. Red
probe connect to ground. Touch No.6 OR No.8 of IC701 with
Picture exists but no sound
Make C713 OR C714 collector
open. Touch No.6 OR No.8 of
Q702 with black probe to see if
Power amplifier is abnormal.
Inspect IC701 and peripheral
components of IC701
Inspect C713
、
C714
Check to see if
+16V exists
Inspect IC201 and peripheral
component of IC201
I16V
power supply
Yes
No
Yes
No
Yes
No
Have noise
No noise
Inspect
Inspect the circuit from
No.51 of IC201 to
No.3 of SK501
Yes
No
Change V501 or
weld V501 again
Check to see if voltages of SK501
are normal
Lack of red
Check to see if V501 is
open or not well welded
Inspect R502,R503,R504
Maintenance Service and Trouble shooting
