TCL CTR1042 User Manual

Colour Television Chassis: M123A
37
No
Ye s
Is it mute at
Pin 1 of
IC601?
Ye s
No sound
Is the speaker
Replace the speaker
Apply the pointer of multimeter at
RX1K
¡
connect one probe to
GND, use another to touch P3, P5 of
IC601, Is there interference noise
from the speaker.
No
Check power
supply of
IC601
Ye s
Is the waveform
at P47 of IC1001
ok?
Ye s
Check/Replace the power
supply of IC1001. Then
RESET
NG
Is the
BUS ok?
Check IC201 and
the relative circuit
No
No
Check/Replace
Q1001, X1002.
NG
Is the waveform at
P31 of IC201 ok?
Replace IC201
No
Ye s
Replac
e IC601
Check/Replace
Q604,Q605.
No
Figure 6 No Sound
Is both +14V and -14V ok?
Ye s
No
Is the signal at P1 of
IC301 ok?
Check/Replace IC301
Check signal at P16 of
IC201
No
Check/Replace
IC201,C234
Ye s
Check/Replace R244,
R306
Ye s
Check/Replace R405,
R409
,
D403
,
D402
No
Figure 7 No Vertical Scanning
5. Faultfinding and Test Point with Waveform Diagram
5.1 Faultfinding

TCL CTR1042 Specifications

General

Brand	TCL
Model	CTR1042
Category	TV
Language	English