NAD C660 Service Manual page 22

LD CHECK (Not Recording)
F
Execute 'E.LD On' of 'How to use
Test Tool (Dragon) :
'VWDC-1 Loop'
PN101 Pin 32 (ENBL) = 'H'?
YES
PN101 Pin 31 (W/XR) = 'H'?
YES
IC108 Pin 5 (WREF)
0.5+/-0.2V?
YES
IC108 Pin 16 (FPDO):
2.9+/-0.3V,
YES
PN101 Pin 27 (VWDC1):
1.2+/-0.8V,
YES
Check the IC P/U connector and
replace the P/U
NO
•Check the connection of IC310 pin 20.
•Check and replace the IC310 (CPLD).
•Check the connection of IC310 pin
NO
18,29 and 34.
•Check and replace the IC310 (CPLD).
NO
•Check the connection of IC110 pin 4.
•Check and replace the IC110 (DAC)
•Check the connection of PN101 pin 19.
NO
•Check and replace the PN101 PICK
UP.
•Check the connection of IC108 pin 10.
NO
•Check the connection of IC110 pin 13.
•Check and replace the IC108, IC110.
Execute 'D.LD Inspection' of
'How to use Test Tool (Dragon)'
YES
VWDC NG?
NO
Normal
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