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5
Picture exists but no sound
Make C305/C306 open. Multimeter is at band R815. Red probe
connect to ground. Touch No.44 of N201 with black probe
No noise
Power amplifier is abnormal.
Inspect N301 and peripheral
components of N201
Inspect C301、C302
Yes
Inspect N201 and peripheral
component of N201
6.
Check to see if V511、 v521、
is open or not ell elded
Yes
Change V511、
v521、v531
Make C301 OR C302 collector
open. Touch No.6 OR No.8 of V301
with black probe to see if noise
Yes
Lack of red
v531
Check to see if voltages of R505
No
Inspect R505
Inspect
Have noise
exists
No
Check to see if
+11V exists
No
Inspect +11V
power supply
No
are normal
Inspect the circuit from
T444 to R505
25
Yes
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