JVC JR-S300 - 7. Power Amplifier Adjustment Procedures; 7-(1) Center Voltage; 7-(2) Idling Current

7. Power Amplifier Adjustment Procedures
R719 R711 R712 R720
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Fig. 13 Fig. 148
( ): For right channel adjustment
Precaution:
Allow
set
to
warm
up
at
least
5
minutes
before
connecting
DC
VT
VM.
7-(1) Center Voltage
1. Tune volume control to minimum.
2. Connect ground lead of DC VTVM to pin 3 (pin 3) and connect probe of DC VTVM to pin 2 (pin 4). Refer to
Fig. 14A.
3. Adjust R711 (R712). Meter should read 0 (+0.05) volt. Refer to Fig. 13.
7-(2) Idling Current
4. Connect ground lead of DC VTVM to pin 2 (pin 4) and connect probe of DC VTVM to pin 1 (pin 5). Refer to
Fig. 14B.
5. Adjust pot R719 (R720) for DC VTVM reading of 10mV. Refer to Fig. 13.
JR-S300
No. 2363 =4%=