Pioneer A-505R Service-Handbuch - Seite 14

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5. ADJUSTMENTS

1) IDLE CURRENT ADJUSTMENT

1. Connect the measuring instrument as Fig.5-1. (R413 or R414)

2. Set the VOLUME CONTROL to minimum, BASS TONE CONTROL to center, TREBLE TONE CONTROL to center, BALANCE CON-

TROL to center and REC SELECTOR SWITCH to off. Set VR301 and VR302 to minimum.

3. Set the POWER switch to ON.

4. Adjust VR301 (VR302) so that the voltage between both sides of R413 (R414) becomes 16mV+1mV. (Within 10 seconds from when the

relay is turned ON)

5. Ages for 7 minutes.

6. Adjust VR30] (VR302) so that the voltage between both sides of R413 (R414) becomes 11mV+I mV.

DC Voltmeter

—_

—

——

VR301

VR302

—

Front

(Top view)

AF Assy

Fig.5-1 Adjustment Method