Yamaha RX-V1 Service Bulletin #224H 电路图.pdf

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1、 TECHNICAL BULLETIN 6660 Orangethorpe Avenue, Buena Park, CA 90620-1345 (714) 522-9105 Number: 224H Effective Date: June 2, 2000 MODEL: RX-V1/DSP-AX1 SERIAL NUMBERS AFFECTED: All FUNCTIONS AFFECTED: Subwoofer Output Verification TYPE OF CHANGE MANDATORY OPTIONAL FOR INFO. ONLY SYMPTOM: Customer comp

2、lains of no or low subwoofer output. CAUSE: Improper set-up by customer. SOLUTION: Check for correct output by setting the MAIN speakers to the SMALL mode with the EFFECTS off (as shown in the Service Manual on page 5 under Output Level/Impedance). Inject a 150 mv 50Hz audio signal into the Left and

3、 Right CD input, select CD on the INPUT SELECTOR, turn the volume control all the way up and check the level at the subwoofer output jacks. The MONO level should be approximately 4 volts RMS, the SPLIT level should be approximately 2 volts RMS with distortion typically less than 0.1%. NOTE: This does not require any speakers to be connected! RadioFans.CN 收音机爱 好者资料库