Caple C702G Manual de Serviço descarregar pdf (Página 99)

100

101

7-11

5. ABNORMAL PICTURE

5-1. Horizontal Size

Measure the voltage at CRT anode.

Normally, the voltage is approx. 27kV.

Check the voltage at CNP pin 6 on the VIDEO PWB (PWE-567A).

fH 7

33.6kHz

36.6kHz

41.5kHz

45.8kHz

52.7kHz

57kHz

69.5kHz

82.6kHz 110kHz

101kHz

fH 3

fH 5

fH 1

fH 2

fH 6

49kHz

65.5kHz

fH 4

121kHz

130kHz

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 4～7、10～12) See Fig. 5.1.1

Check HV voltage

HV circuit failure (see item 6)

Check 8.5V line

1 2 ... 94 95 96 97 98 99 100 101 102 103 104 ... 285 286

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