Aiwa HV-FX5100 service manual Troubleshooting Guide, E-22

TROUBLESHOOTING GUIDE

NO E-E(VIDEO AND

AUDIO FROM TUNER)

Are the plugs connected

to the VIDEO/AUDIO input jacks ?

No

Yes

Disconnect the plugs from the

VIDEO/AUDIO input jacks.

Do the voltages		appear
at each terminal		PB(5V),	No	Check Power Block.
TU(32V) and B+(5V) of
TU6001 ?
	Yes

CHECK AUDIO

Does AUDIO signal appear at pin 21 of TU6001 ?

Yes

Does AUDIO signal appear at pin 1 and 2 of IC6601 ?

Yes

Check IC5501.

Check IC6601.

No No

Replace TU6001.

No

CHECK VIDEO

Does VIDEO signal appear at pin 24 of TU6001 ?

Yes

Is there VIDEO waveform at emitter of Q6603 ?

Yes

Is there VIDEO waveform at pin 52 of IC4001 ?

Yes

Check IC4501.

No

Replace Q6603.

No

Check IC4001.

E-22