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Adjustments - Hitachi AXF300EBS Service Manual

Mini component hi-fi system
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AX-F300

ADJUSTMENTS

Measuring Instruments Necessar y for Adjustments
• DC voltmeter
• Screwdrivers for adjustments
Before adjustments, perform the following setting in the receiver section (HTA-R100).
Note: Making adjustments without performing the following setting may result in damage of power transistors.
(1) Power switch
: OFF
(2) Volume knob
: MIN
(3) Function switch : AUX
(4) Speaker
: Open
(5) VR502L/R
: Minimum
1. Idle Current Adjustment
(1) Connect the DC voltmeter to PG502. (Refer to the connection diagram.)
(2) Turn on the power and adjust VR502L (on the left) and VR502R (on the right) so that the measured value of the voltme-
ter can be within the range of 2 ± 0.5 mV.
DC Voltmeter
DC Voltmeter
+
+
VR502R
PG502
PRE AMP PWB
– 10 –
VR502L

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