Harman Kardon AVR 7300

*** AVR7300 OFFSET ADJUSTMENT & IDLE CURRENT ADJUSTMENT(TMS stage)
1 Offset - Adjustment
* .Function : 8CH DIRECT INPUT
.Volume level : minimum
.Test position : Speaker out terminal(between "+" and "-")->speaker jack
: unload(no dummy) status,
Adjustment flow
a. After power on
b. Take alignment about to 0
±
5mV
Channel Check point Adjustment position Adjustment Limit Note
FRONT L CH FL SPEAKER VR11(3channel AMP)
0
±
10mV
FL
REAR L CH SL SPEAKER VR21(3channel AMP)
0
±
10mV
SL
SURRBACK L CH SL SPEAKER VR31(3channel AMP)
0
±
10mV
SBL
REAR R CH SR SPEAKER VR41(4channel AMP)
0
±
10mV
SR
SURRBACK R CH SBR SPEAKER VR51(4channel AMP)
0
±
10mV
SBR
FRONT R CH FR SPEAKER VR61(4channel AMP)
0
±
10mV
FL
CENTER CH CTR SPEAKER VR71(4channel AMP)
0
±
10mV
CT
c.Passed about 5 Min. Do it again as 0
±
20mV
2 Idle - adjustment
* .Function : 8CH DIRECT INPUT
.Volume level : minimum
.Test position : refer to the below.
Adjustment flow
a.Assemble AMP BD to Heat Sink
b.After Power on, take alignment about 6.0~7.0mV.
Channel Check point Adjustment position Adjustment Limit Note
FRONT L CH P101(R172) VR12 (3channel AMP) 12.0mV~13.0mV FL
REAR L CH P201(R272) VR22 (3channel AMP) 12.0mV~13.0mV SL
SURRBACK L CH P301(R372) VR32 (3channel AMP) 12.0mV~13.0mV SBL
11.0mV~13.0mV
REAR R CH P401(R472) VR42 (4channel AMP) 12.0mV~13.0mV SR
SURRBACK R CH P501(R572) VR52 (4channel AMP) 12.0mV~13.0mV SBR
FRONT R CH P601(R672) VR62 (4channel AMP) 12.0mV~13.0mV FL
CENTER CH P701(R772) VR72 (4channel AMP) 12.0mV~13.0mV CT
c.Passed about 5 Min. Do it again as 12.0mV~13.0mV.