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