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Extracted text from Nad S 100 Service Manual (Ocr-read)
Page 1
Service Tip S100
Led brightness change
PROBLEM: Some leds are brighter than others.
CAUSE: Variation in led brightness.
SOLUTION: Adjust current in leds to give even brightness by changing
resistors.
Change R477 from 2K67 or 2K74 to 3K.
Change R533 from 18k or 9k1 to 6k2.
PRODUCTION:
This modification has been implemented in production from serial number:1635
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
Service Information
Circuit Change
PROBLEM: A DC VOLTAGE IS PRESENT ON THE PREAMP OUTPUT WHEN THEPHONO IS SELECTED
CAUSE: DC OFFSET OUT OF RANGE FOR DC SERVO CIRCUIT
SOLUTION: REPLACE R33 & R34 ON THE RIAA MODULE FROM 19.6 K OHM TO 10.0
K OHM METAL FILM AT 1 % TOLERANCE
PRODUCTION:
THIS CHANGE WAS NOT IMPLEMENTED IN PRODUCTION
Contact:
NAD Electronics International
633 Granite Court
Pickering, ON Canada L1K 3K1
Voice: 905-831-0799 FAX 905-837-6357
www. nadelectronics.com
