Caple C702G Manual de Serviço descarregar pdf (Página 104)

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5-7. Poor Focus

Adjust Focus VR on FBT. (F1 and F2)

FBT, focus lead, CRT socket or CRT failure.

Check the dynamic focus voltage at TP-DF.

H. Dynamic focus voltage is approx. 580Vp-p.

V. Dynamic focus voltage is approx. 170Vp-p.

Check the waveform at CN-DSB pin 1. Check the waveform at CN-DSB pin 2.

Check the waveform at IC513 pin 5. Check the waveform at IC510 pin 10.

IC510 or its ambient circuit failure.

･IC501,R527 or C520 failure.

･Digital control circuit failure. (See item 12)

Check the waveform at CN-DF pin 3.

Check the waveform at CN-DF pin 4.

Q951 or its ambient circuit failure.

DEF PWB pattern failure.

Check the Q5X1 Emitter voltage and

confirm the voltage approx. -80V.

Q981~Q985, T981 or their ambient

circuit failure.

Q5X1, Q5X2 or their ambient

circuit failure.

V is NG.

H is NG.

Focus is poor all over the screen.

Focus performance is different at center and other parts of the screen.

･IC501,R501 or C501 failure.

･Digital control circuit failure. (See item 12)

IC513 or its ambient circuit failure.

Q987, T981 or their ambient circuit failure.

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Caple C702G Manual de Serviço Página 104