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Extracted text from Nad C 370 Service Information (Ocr-read)
Page 1
Service Information C370
Circuit Change
PROBLEM: There is a small residual output when the volume is set to
minimum.
CAUSE: Not enough attenuation of the volume control when the input level
is high.
SOLUTION: Increase the attenuation of the volume control by changing the
value of R514 and R614 from 3R0 to any value up to 3R6.
PRODUCTION:
This circuit change has been implemented in production from serial number: H08C37000055.
Contact:
NAD Electronics International
633 Granite Court
Pickering, ON Canada L1K 3K1
Voice: 905-831-0799 FAX 905-837-6357
NAD@www.NADelectronics.com
Page 2
NAD C370
ERRATUM SERVICE MANUAL
Although the manual has been thoroughly checked before printing there is an error in
the part list.
Ref no. Old part New part RV3 09-16203-22M 09-16103-12M
This reference can be found on page 15 of the manual.
PAGE 3-01-01
Page 3
Service Information C370
Circuit Change
Some customers require the headphones to be on and the
speakers at the same time.
The headphone socket switch is normally closed to allow the
speaker relays to operate. When the headphones are plugged in the switch
opens turning off the speaker relays.
By wiring a jumper across this switch the speaker relays will
always have power. The headphones will have no affect on the speaker relays.
Locate connector CZ705 on the headphone and standby board.
Solder a wire on the bottom of the board across pin number 1 and 2, labelled
SW and SWG respectively. Test headphones and check speakers are still on.
Contact:
NAD Electronics International
633 Granite Court
Pickering, ON Canada L1K 3K1
Voice: 905-831-0799 FAX 905-837-6357
www.NADelectronics.com
