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5
Make C301/C302 open. Multimeter is at band RΧ1K. Red
probe connect to ground. Touch No.1 OR No.9 of N301 with
No noise
Power amplifier is abnormal.
Inspect N301 and peripheral
components of N301
Inspect N201 and peripheral
component of N201
6.
Yes
Change V901 or
weld V901 again
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Picture exists but no sound
Yes
Inspect C301、C302
Yes
Lack of red
Check to see if V601 is
open or not well welded
Check to see if voltages of XZ601
No
Inspect R601
Inspect
28
Have noise
Make C301 OR C302 collector
open. Touch No.1 OR No.9 of
N301 with black probe to see if
Check to see if
+12.89V exists
Inspect
+12.89V power
No
are normal
Inspect the circuit from
No.50 of N201 to No.3
of XZ601
No
No
Yes
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