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17. TROUBLESHOOTING CHART
Is power supplied +5V, +12V lines?
Are input signals applied to 13 , 14 terminals?
Are inputs applied to pins 14 , 8 of QD01?
Do output pins L 10 , R 11 develop outputs?
Check Sound volume control circuit (H002) and Front
power amplifier circuit (Q670).
No rear sound.
Is rear sound component contained in the
Is input applied to pin 4 of QD03?
Do pin 7 and 8 of QD03 develop outputs?
Does Sout 6 develop the output?
Check Sound volume control circuit (H002) and Rear
power amplifier circuit (Q640).
No sound.
OK
OK
OK
OK
input signal?
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
NG
NG
124
Check Power supply circuit.
Check A/V SW output.
Check Input Buffer (QD01).
Check DSP front addition circuit (QD02).
Rear sound is not developed as Adaptive
matrix circuit is actuated.
Use an effective source.
Check L-R matrix circuit (QD01) and
Anti-alias Filter (QD01 & 02).
Check DSP (QD03) and DSP control data.
Check LPF (QD06) and Dolby NR
circuit (QD07 & 02).
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Table of Contents
Troubleshooting
