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Colour Television
Figure3
No Raster, +B OK
No raster
+
B Voltage OK
Is the voltage
of
Pin8
IC202 5v
No
Is the resistance
to earth of pin8
if IC201 ok
Figure 4 No Sound
No sound
Is the speaker OK ?
NO
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.
Yes
Is the waveform
No
at P57 P58 of
IC201 ok?
Yes
Check the circuit between
IC601 and IC201
Replace IC201
NO
Is
the
H-out
Yes
waveform at PIN
56 of IC201 OK?
No
Replace
IC201
Ye
Replace the speaker
No
Replace IC201
Chassis:
Replace Q402
No
Yes Check the waveform
at
static
working
point of Q402.
Check
power
Yes
supply
of
IC601
NX56
No
Is it mute at
Pin
7
of
Yes
IC601?
Replace
IC601
Check/Replace
Q602,Q600.
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