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?
Yes
Cheek /
Replace
Q801
Is D815~D818
OK
?
Yes
Check IC801 and
the peripheral
components.
Replace
D815~D818
No
No
Figure 1 Fuse Blown
No raster
ab B
Is the + B,
resistance to earth
ok ?
Check the load of
B+
No
Yes
Check IC802 and their
peripheral components
Yes
Check Q830
Q831, Q832
etc.
Figure2 No Raster AbB
Summary of Contents for CTR1042
Page 41: ...Colour Television Chassis M123A 41 6 Block Diagram and I2C 6 1 Block Diagram...
Page 49: ...Colour Television Chassis M123A 49 7 Electrical Diagrams 7 10 CRT Panel...
Page 52: ...Colour Television Chassis M123A 52 8 PCB 8 1 Main PCB...
Page 53: ...Colour Television Chassis M123A 53 8 PCB 8 2 CRT PCB...
Page 54: ...Colour Television Chassis M123A 54 8 PCB 8 3 MPX PCB...
Page 55: ...Colour Television Chassis M123A 55 8 PCB 8 4 SIDE AV PCB...
