Demon PMA-1520AE Service Manual
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Contents
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ADJUSTMENTIDLING CURRENT ALIGNMENTSetup(1) Place the unit at an ordinary position avoiding direct air flow from an air-conditioner or fan. Do the adjustment at atemperature between 15°C (59°F) and 30°C (86°F).(2) Set control as follows.POWER switch → OFF (j).VOLUME comtrol → Fully counterclockwise (c min).SPEAKER terminals → Open: do not connect the speakers.Adjustment(1) Remove top cover. And then connect DC voltmeter to the test points N801 and N802 of POWER AMP P.W.B.(8U-110144-1).(2) Connect power cord to AC230V (218~242V) (Europe & Asia models) or (AC220V (209~231V) (China models) walloutlet, and turn POWER switch "ON" (h).(3) Right after power on, adjust R895 and R896 so that the DC voltmeter reads 10 ± 2mV.(4) Then after 2 minutes warmup adjust R895 and R896 so that the DC voltmeter reads 10 ± 1mV.(5) And after 10 minutes warmup adjust R895 and R896 so that the DC voltmeter reads 10 ± 1mV.VolumeDC VoltmeterPower Amp P.W.B.R895TransTransN801 N802R8968U-110144-114 |
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