TROUBLESHOOTING GUIDE
GOOD PICTURE BUT NO SOUND
Replace FUSE RESISTOR (R517).
Check speaker and the
peripheral circuit.
Check Sound +B line.
Yes
Is the voltage at pin
1 corrector of Q351
DC12V ?
Yes
Yes
Is the voltage at CP301
changed with the volume
up or down key ?
No
No
No
No
Yes
Is FUSE RESISTOR
(R517) broken ?
Is the voltage at EMITTER
of Q357 DC15V ?
Check Q357, Q358 and the
peripheral circuit.
Check Q351, Q352 and the
peripheral circuit.
E-3
