7-11
5. ABNORMAL PICTURE
5-1. Horizontal Size
Measure the voltage at CRT anode.
Normally, the voltage is approx. 27KV.
NG
OK
Check the voltage at CNP pin 6 on the VIDEO PWB (PWE-567A).
NG
OK
NG
OK
fH7
33.6kHz
36.6kHz
41.5kHz
45.8kHz
52.7kHz
57kHz
69.5kHz
82.6kHz
115kHz
101kHz
fH3
fH5
fH1
fH2
fH6
49kHz
65.5kHz
30.8kHz
Fig 5.1.1
CONTINUE
SW REG. failure (see item 13)
Check the voltage which is supplied to CPU
IC801, IC802, IC8G1, IC7A1or their ambient circuit failure
Check the horizontal frequency mode output (IC571 pins 5~7、10~12) See Fig. 5.1.1
Check HV voltage
HV circuit failure (see item 6)
Check 8.5V line
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