HarmanKardon-AVR7300-avr-sm1维修电路原理图.pdf

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1、AVR 7300 Audio/VideoReceiver SERVICE MANUAL Power for the Digital Revolution RadioFans.CN TECHNICAL SPECIFICATIONS 61 Technical Specifications Audio Section Stereo Mode Continuous Average Power (FTC) 125 Watts per channel, 20Hz20kHz, 0.07% THD, both channels driven into 8 ohms 5/7 Channel Surround M

2、odes Power Per Individual Channel Front L&R channels: 110 Watts per channel, 0.07% THD, 20Hz20kHz into 8 ohms Center channel: 110 Watts, 0.07% THD, 20Hz20kHz into 8 ohms Surround (L & R Side, L & R Back) channels: 110 Watts per channel, speaker jack : unload(no dummy) status, Adjustment flow a. Afte

3、r power on b. Take alignment about to 05mV ChannelCheck pointAdjustment positionAdjustment LimitNote FRONT L CHFL SPEAKERVR11(3channel AMP) 010mVFL REAR L CHSL SPEAKERVR21(3channel AMP) 010mVSL SURRBACK L CHSL SPEAKERVR31(3channel AMP) 010mVSBL REAR R CHSR SPEAKERVR41(4channel AMP) 010mVSR SURRBACK

4、R CHSBR SPEAKERVR51(4channel AMP) 010mVSBR FRONT R CHFR SPEAKERVR61(4channel AMP) 010mVFL CENTER CHCTR SPEAKERVR71(4channel AMP) 010mV CT c.Passed about 5 Min. Do it again as 020mV 2Idle - adjustment * .Function : 8CH DIRECT INPUT .Volume level : minimum .Test position : refer to the below. Adjustme

5、nt flow a.Assemble AMP BD to Heat Sink b.After Power on, take alignment about 6.07.0mV. ChannelCheck pointAdjustment positionAdjustment LimitNote FRONT L CHP101(R172)VR12 (3channel AMP)12.0mV13.0mVFL REAR L CHP201(R272)VR22 (3channel AMP)12.0mV13.0mVSL SURRBACK L CHP301(R372)VR32 (3channel AMP)12.0m

6、V13.0mVSBL 11.0mV13.0mV REAR R CHP401(R472)VR42 (4channel AMP)12.0mV13.0mVSR SURRBACK R CHP501(R572)VR52 (4channel AMP)12.0mV13.0mVSBR FRONT R CHP601(R672)VR62 (4channel AMP)12.0mV13.0mVFL CENTER CHP701(R772)VR72 (4channel AMP)12.0mV13.0mVCT c.Passed about 5 Min. Do it again as 12.0mV13.0mV. 3Adjust

7、ment Position FL Offset Adj FL Idle Adj SL Offset Adj SL Idle Adj SBL Idle Adj SBL Idle Adj SR Offset Adj SR Idle Adj SBR Offset Adj SBR Idle Adj 4Check Position FR Offset Adj FR Idle Adj CT Offset Adj CT Idle Adj FL Idle Check Position SL Idle Check Position SBL Idle Check Position SR Idle Check Position SBR Idle Check Position FR Idle Check Position CT Idle Check Position 47R 1W Rev.NO. 2