Colour Television Chassis:
No
Is it mute at
Pin 7 of
IC601?
Yes
No sound
Is the speaker OK ?
Replace the speaker
Apply the pointer of multimeter at
RX1K
¡
connect one probe to
GND, use another to touch P12, P4
of IC601, Is there interference noise
from the speaker.
No
Check power
supply of
IC601
Yes
Is the waveform
at P57 P58 of
IC201 ok?
Yes
Replace
IC601
Check/Replace
Q602,Q600.
No
Figure 4 No Sound
No raster +
B Voltage OK
Is the voltage
of Pin8
IC202 5v
Is the resistance
to earth of pin8
if IC201 ok
No
Yes
Is the H-out
waveform at PIN
56 of IC201 OK?
Yes Check the waveform
at static working
point of Q402.
No
Replace
IC201
NO
Replace IC201
Replace Q402
No
Figure3 No Raster, +B OK
Ye
NO
Replace IC201
Yes
Check the circuit between
IC601 and IC201
NX56
