No Raster, +B Ok; No Sound - TCL 21M63S-NX56E Service Manual

Colour Television
Figure3

No Raster, +B OK

No raster +
B Voltage OK
Is the voltage
Yes
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 Ω
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
waveform at PIN
56 of IC201 OK?
No
Replace
IC201
Ye
Replace the speaker
No Check
supply
IC601
Replace IC201
Chassis:
Replace Q402
No
Yes Check the waveform
at static working
point of Q402.
Is it mute at
power Yes
Pin
of
IC601?
NX56
Replace
IC601
No
7 of
Yes
Check/Replace
Q602,Q600.