Harman Kardon AVR430 Service Manual

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Contents

Harman Kardon AVR430 Service Manual Manual pdf 17 page image

SERVICE PROCEDUREALIGNMENT PROCEDURES1.MAIN AMP idling AdjustmentSET CONDITION1) SEMI VOLUME POSITION at MAIN/SURROUND AMP BoardMAIN:VR71.VR74SURROUND:VR72.VR73NO Signal/No LoadAC Line Voltage:120V/60Hz.230V/50Hz2) After turning on the unit keep it over than 25min (keep the power/Driver TR as normal temperature)3) Adjust the voltage value of primary&secondary of wafer to be 25mV by rotating the semi volume of each channelto the rightCHANNEL ADJUSTMENT MEASUREMENT VOLTAGEFRONT-L CH VR-71 P801 23+/-2mVFRONT-R CH VR-74 P804 23+/-2mVSURROUNT-L CH VR-73 P803 23+/-2mVSURROUNT-R CH VR-72 P802 23+/-2mV4) CAUTION .In case that power TR or DRIVER TR is needed to be replace for repairing the corresponding channel should beadjusted againFRONT AMP:Q433.Q435.Q437.Q439.Q330.Q332.Q334.Q336SURROUND AMP:Q434.Q436.Q438.Q440.Q329.Q331.Q333.Q3352.SURROUND BACK AMP idling AdjustmentSET CONDITION1) SEMI VOLUME POSITION at CENTER/SURROUND BACK AMP BoardCENTER:VR32SURROUND BACK:VR31.VR51NO Signal/No LoadAC Line Voltage:120V/60Hz.230V/50Hz2) After turning on the unit keep it over than 25min (keep the power/Driver TR as normal temperature)3) Adjust the voltage value of primary&secondary of wafer to be 25mV by rotating the semi volume of each channelto the rightCHANNEL ADJUSTMENT MEASUREMENT VOLTAGECENTER VR-32 P308 23+/-2mVSUR BACK-L CH VR-31 P301 23+/-2mVSUR BACK-R CH VR-51 P309 23+/-2mV4) CAUTION .In case that power TR or DVIER TR is needed to be replace for repairing the corresponding channel should be adjustedagainCENTER AMP:Q416Q417.Q418.Q419SUR BACK AMP:Q316.Q317.Q318.Q319.Q516.Q517.Q518.Q5193.Cautions for main adjustment1) At MAIN/SURROUND BACK BOARD.use the below capacitor after discharging for sufficent time for preventing possibledamage from electrical sparkMAIN C504.C505 AVR630 15000/63VBOARD C571.C572 AVR430 12000/63VSUR BACK C201.C202 AVR630 10000/63VCENTER BOARD C201.C202 AVR430 8200/63V2)The checking for MAIN/SURR-BACK BOARD should have the discharging circuit dischargeover 30sec.through(4R7Ohm 10W)resistor after push power sw offAVR430/AVR630 harman/kardon17