Checking The Audio Circuit - NEC NMV 1700V Service Manual

12. Checking the audio circuit

Aren't the setups of the host PC a
Is correct output waveform being
inputted from JK011 pin 2, 3 of the
Is the waveform which is the same
as JK011 being inputted to I006 pin
Is output wavefrom being outputted
Trouble Shooting
Is a cable with the host PC
connected?
Failure point
NG
OK
Audio cable disconntction.
minimum and off?
Failure point
NG
OK
The setup of the host PC is changed.
host PC?
Failure point
NG
OK
Audio cable disconntction.
2, 29?
NG
1) Printed wire broke between JK011 pin 2, 3 and I006 pin 2, 29.
OK
2) R047, R048 open.
3) R049, R050 short.
4) C062, C063 open.
in I006 pin 9, 22?
NG
Is 9V supplied to I006 pin 10?
OK
NG
Is 19V supplied to I008 pin 2?
OK
a
Failure point
I006 failure
Failure point
Proceed section 10 "Checking the
NG
OK
DC/DC converter circuit".
b
NMV 1700V
Page 15