Harman Kardon AVR 7300 Service Manual page 82

*** 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
FRONT L CH FL SPEAKER
REAR L CH SL SPEAKER
SURRBACK L CH SL SPEAKER
REAR R CH SR SPEAKER
SURRBACK R CH SBR SPEAKER
FRONT R CH FR SPEAKER
CENTER CH CTR SPEAKER
c.Passed about 5 Min. Do it again as
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
FRONT L CH P101(R172)
REAR L CH P201(R272)
SURRBACK L CH P301(R372)
REAR R CH P401(R472)
SURRBACK R CH P501(R572)
FRONT R CH P601(R672)
CENTER CH P701(R772)
c.Passed about 5 Min. Do it again as 12.0mV~13.0mV.
Adjustment position
VR11(3channel AMP)
VR21(3channel AMP)
VR31(3channel AMP)
VR41(4channel AMP)
VR51(4channel AMP)
VR61(4channel AMP)
VR71(4channel AMP)
0±20mV
Adjustment position
VR12 (3channel AMP)
VR22 (3channel AMP)
VR32 (3channel AMP)
VR42 (4channel AMP)
VR52 (4channel AMP)
VR62 (4channel AMP)
VR72 (4channel AMP)
Adjustment Limit Note
0±10mV FL
0±10mV SL
0±10mV SBL
0±10mV
SR
0±10mV
SBR
0±10mV
FL
0±10mV
CT
Adjustment Limit Note
12.0mV~13.0mV FL
12.0mV~13.0mV SL
12.0mV~13.0mV SBL
11.0mV~13.0mV
12.0mV~13.0mV SR
12.0mV~13.0mV SBR
12.0mV~13.0mV FL
12.0mV~13.0mV CT