Troubleshooting Guide - JVC TV-20F242 Service Manual

(Television division)
It dose not enter the power
suppiy(1)
When it pushed the
power button is it
lighted?
YES
The 7th pin of cp810
does it exist DC13V?
YES
Q502 and Q513 normal?
YES
Investigate F502 and the
peripheral circuit.
It dose not enter the power
suppiy(2)
CP810 is it insert?
Does F501 get broken?
YES
Exchange F501.
34

TROUBLESHOOTING GUIDE

NO
NO
Does the base voltage of
NO
Q512,Q513 make on/off?
Investigate Q512,Q513 and the
peripheral circuit.
NO
NO
Voltage of C507 is there
about 170V?
Investigate the IC501 and the
peripheral circuit.
Investigate unreg8V line and
Investigate the 28 pin of IC1001
NO
YES
Investigate the F501,C507,R501
NO
and the peripheral circuit.
YES
AT5V line.
Investigate D508.
and the peripheral circuit.
CP810 is insert