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Mm PMA-510
METHOD
OF ADJUSTMENT
ETC-375
AUE-009B
IDLE
CURRENT
ADJUSTMENT
METHOD
OF
TONE
& POWER
AMP
(ETC-375
PRINTED
BOARD)
1.
6.
1s
Place the unit in normal
position, not sideways or tilted. Avoid
too much ventilation, since the adjustment must be
done where temperature is between 15°C and 30°C.
Set the switches on the unit as follows:
Power
>
OFF
Volume
>
—odB
|
Speaker terminals
—
No load (no speaker connected)
Remove the top cover, and the VR7,8,9 and 10 of the tone & power amp printed board (2220609001)
fully counter
clockwise.
.
Connect a DC voltmeter to the test points 12(+), 13(—) or to 22(+), 23(—).
Plug in the AC cord to power outlet of: Europe 220 V (198~231
V); U.K. and Australia 240 V (216~252 V}; Canada
and U.S.A. 120 V (180~126 V}; and turn the power on.
immediately
(within one minute), turn VR7
and VR8
clockwise
and adjust the test point voltage (VTP) to 641 mV
preliminarily.
After about two or three minutes of the above preliminary adjustment, adjust VR7 and VR8 so as VTP reads 641 mV.
Adjust VRQ and VR10 so as VTP reads 1542 mV preliminarily.
About 4 minutes after the above preliminary adjustment, adjust VR9 and VR10 so as VTP reads 2342 mV.
°
ADJUSTMENT
OF
EQUALIZER
(AUE-009B
PRINTED
BOARD)
1.
Insert short pins into PHONO input terminals.
Connect a digital voltmeter (0.01 mV ~ 1 mV
DC range must be measurable) into each of REC. out terminals (L & R
channels).
For easier measuring to avoid value fluctuation on the meter, connect a 100 k ohm (1/4W) resistor between the ends of
the R17/18 10 M ohms (1/4W) resistor on the printed board.
Set the FUNCTION switch to "MM" position, and turn the main volume to MIN.
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