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TROUBLE SHOOTING GUIDE
Flow charts and diagrams in this chapter provide you with the information you need for diagonostic problem
isolation and component replacement.
NO RASTER (FAIL CHECK PROCEDURE)
Check
85V Line
24V Line
NO
I
Check Power Part
I
6.3V Line(HEATER)
Refer to ATT 1
12V Line
FBT B+ Line
YES
Check High Voltage
NO
Check H-OSC
Operation
H-DEF.
HV-Current
Refer to ATT 2
YES
Check Vertical
NO
Check;SW301,1C401
Circuit
1C402,1C301 and
its related circuit
YES
Check CRT Socket B
+,
NO
Check CRT SOcket B
+
Line,
145V,85V,6.3V,12V,5V
and its related circuit
YES
Check Self Raster
NO
(disconnect signal cable)
Check Blanking Circuit
YES
YES
I
NO
I
Check IC101,IC102,Q103-Q105
ZD401,Q405 and
Q109-Q114,CRT Pin Connection
its related Circuit
NO
Turn the Screen,BRT,CONT
Control Clockwise
(A)
Check Syncronization
NO
Check H,V,SYNC Circuit
(connect signal cable)
Refer to ATT 3
- 16-
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