TCL CTR1042

Colour Television Chassis: M123A
34
5. Faultfinding and Test Point with Waveform Diagram
5.1 Faultfinding
Fuse Blown
Is the drain of
Q801 shorted
to earth?
Ye s
Cheek /
Replace
Q801
Is D815~D818
OK?
Ye s
Check IC801 and
the peripheral
components.
Replace
D815~D818
No
No
Figure 1 Fuse Blown
No raster
abnormal + B
Is the + B,
resistance to earth
ok ?
Check the load of
B+
No
Ye s
Check IC802 and their
peripheral components
Ye s
Check Q830
Q831, Q832
e
t
c.
Figure2 No Raster Abnormal +B