TCL CTR1042 User Manual

Colour Television Chassis: M123A
39
Symptom:
Tuning Control
doesn’t work
Press
STANBY key
on R/C. Can
the TV be
turn on and
turn off?
Does the channel
number display
on the screen?
Ye s
No
Start auto-
search. Is the
BUS ok?
Ye s
After auto-search, Can
the searched program
be memorized?
Is the voltage at
P9 o
f
IC201ok?
Replace IC201
Ye s
Ye s
Check/Repair +5V
power supply.
No
No
Is there sync
pulse at P62
of IC201?
No
Check the power
supply of IC201.
Are there H & V
flyback pulses at
P12 of IC201
No
No
Check
R408,R406,D404,C422
Ye s
Check/Replace
IC201
No
Check the
waveform
at Pin57,
Pin58 of
IC201
No
Ye s
Is the
+33V/+5
VA power
supply
ok?
Check/Repair +33V
power supply
No
Ye s
Is there the
short circuit
around the
integration
circuit?
Check/Replace
the tuner
No
Check/Repair
the integration
Ye s
Figure 9 Tuning Control doesn’t work
ķ
Is there sync pulse at B
of Q003?
Replace Q003
Ye s
Check Q210, Q211
and the peripheral
circuit.
No
Ye s
5. Faultfinding and Test Point with Waveform Diagram
5.1 Faultfinding

TCL CTR1042 Specifications

General

Brand	TCL
Model	CTR1042
Category	TV
Language	English