Zenith DVT654 Service Manual - 2. Audio Μ-Com Circuit

- 2-2 -

2. AUDIO µ-COM CIRCUIT

POWER ON

Does 

DVD Error

appear

 at

FLD?

Does

AV 1/2 FM87.5 

appear at FLD?

Check

Connector(PN902)

Check power part

of Main B/D.

Check oscillator

of x101.

Check if IC101

PIN80 is High.

Check if IC101

PIN92 is High.

Check if IC101 PIN

31, 32, 51, 88 are high

(5V).

Check if IC101

PIN96 is High.

Replace IC101.

Does CD/DVD

appear at FLD?

Reconnect 

PN902

.

Refer to SMPS

OK.

Refer to oscillator

Circuit.

Check DVD Reset Waveform.

Check IC101 Reset Wavefrom.

Check 5V line.

Check Power section Circuit.

Does READING

appear at FLD?

Does no Disc or

Time appear at FLD?

Check if DVD an Audio 

Micom Interface is OK.

Check power.

Check DVD Module.

Check SMPS.