Pioneer SA-610 Panduan Servis - Halaman 10

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8 . A D J U S T M E N T S

8 . 1 I D L E C U R R E N T A D J U S T M E N T

1. Set the SPEAKERS selector to the A position,

and connect an 8Q resistor to the speaker out-

put terminals.

2. Turn the VOLUME control down to minimum

level, turn the power on, and wait about 10

minutes.

3. Connect a DC voltmeter to the TP terminals

(Lch; TP4 and TP3, Rch; TP2 and TP1) of the

AF Amplifier Assembly (GWK-144).

4. Check that the voltage between TP4 and TP3

(Lch) lies within the DC 4mV-50mV range

then make a similar check for the Rch (between

TP2 and TP1). If the voltage is less than 4mV,

cut jumper wire A (Lch), and jumper wire B

(Rch). If the voltage exceeds 70mV, check for

circuit failure.

8.2 OUTPUT INDICATOR ADJUSTMENT

1. Set the TONE CONTROL to the center position.

2. Set the SPEAKERS selector to the A position,

and connect an 8O resistor and AC voltmeter to

the speaker output terminals.

3. Set the FUNCTION switch to the AUX position,

and apply a 7kHz, 150mV signal to the AUX

terminals.

4. Adjust the VOLUME control so that the voltage

on the output terminals (SPEAKERS) read 9V

( A C ) .

5. Adjust VR1 (Lch) and VR2 (Rch) of the in-

dicator assembly so that the output power

indicator read 10 watts.

AF Amplifier Assembly

( G W K - 1 4 4 )

@ Jumper wire A

J u m p e r

--l

@vR2

vR1

F.L Meter Assembly e

F i g . 8 - 1 A d j u s t m e n t p o i n t

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