JVC AV20F702
Manual de Servicio

AV-20F702

TROUBLESHOOTING GUIDE
NO POWER

Is the voltage at IC501 DC24.0V ?

Yes

Check the circuit after IC501.

No IC501 Is the voltage at pin 4 of IC501 DC18V ? Yes Check IC501 and associated circuit. 1 No 4 A Is the voltage at the point A in the Figure DC170V ? Yes Broken wire of R501 or short circuit on GND. R501 T501

No

Is the voltage at the point B in the Figure AC120V ?

Yes

Check R501 rectifying circuit. B

D501~D504

No RY101 Is the voltage at the point C in the Figure AC120V ? Yes Check associated circuit of the Relay. D No

C

L501

Is the voltage at the point D in the Figure AC120V ?

Yes

F501 Broken wire of L501. CP501

No

Is the voltage on both ends of CP501 AC120V ?

Yes

Broken wire of F501.

CD501

No Broken wire of AC cord or check CP501.

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No.51911