Colour Television Chassis:
No
Is it mute at
Pin 7 of
IC601?
Ye s
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
Ye s
Is the waveform
at P57 P58 of
IC201 ok?
Ye s
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
Ye s
Is the H-out
waveform at PIN
56 of IC201 OK?
Ye s
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
Ye s
Check the circuit between
IC601 and IC201
NX56
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