Nad-S-100-Service-Manual 电路图 维修手册.pdf

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1、PAGE 1-01-01 Service Tip S100 Modification PROBLEM: Some leds are brighter than others. CAUSE: Variation in led brightness. SOLUTION: Adjust current in leds to give even brightness. Change R477 from 2K67 or 2K74 to 3K. Change R533 from 18k or 9k1 to 6k2. PRODUCTION: This modification has been implem

2、ented 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 NADwww.NAD RadioFans.CN 收音机爱 好者资料库 Service Tip S100 Led brightness change PROBLEM: Some leds are brighter than others. CAUSE: Variati

3、on 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 Internation

4、al 633 Granite Court Pickering, ON Canada L1K 3K1 Voice: 905-831-0799 FAX 905-837-6357 NADwww.NAD RadioFans.CN 收音机爱 好者资料库 Service Information Circuit Change PROBLEM:A DC VOLTAGE IS PRESENT ON THE PREAMP OUTPUT WHEN THE PHONO 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 RadioFans.CN 收音机爱 好者资料库