Caple C702G Manual de Serviço descarregar pdf (Página 111)

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7. V OSC / DEF CIRCUIT FAILURE

Measure the voltage at CN-K pins K2 and K4 on the DEF PWB (PWE-624)

Pin K2 voltage is approx. 14.5V. Pin K4 voltage is approx. -15.6V.

Check sync pulse (VD) at CN-DSB pin 6 on the DEF PWB

(PWE-624)

Check +15V/-15V line.

･CN-K wire failure.

･Check SW REG. (see item 13)

Check the sawtooth wave at IC421 pin 8 on the DEF PWB (PWE-624).

Check the sawtooth wave at CN-DSB pin 11 on the DEF PWB (PWE-624).

IC421 or its ambient circuit failure.

Check the vertical input trigger.

Check the unstable picture (see item 3-2)

Check the sawtooth wave at IC511 pin 12.

IC511 or its ambient circuit failure.

･IC501 failure.

･Digital control circuit failure (see item 12)

･IC401 or its ambient circuit failure .

･V DY failure.

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Caple C702G Manual de Serviço Página 111

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