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Adjustment of O/P
Amplifier
(Quiescent Current)
Volume to minimum.
Set to be switched on
approx. 2 mins. before
adjustment.
Unloaded O/P i. e.
without loudspeakers
Remove the fuses
Fu. 401 and Fu. 404
alternately and clip
aDC
Current instrument across
the fuse holder.
Also bridge the fuse
holder with a 1 uF
Capacitor
Adjust R 411 (Fu. 401)
and R 412 (Fu. 404)
for35mA+2mA
After adjustment,
1
remove the 1 wF
Capacitor and the DC
Current instrument.
Replace fuse
Connect centre zero
meter (+ 3 V) to Bu. 403
and 404 alternately
Check mid-point
voltage U,.5, S 30 mV
Genre de réglage
(sorties sans charge)
zéro milieu (+3V)ala
1
Apres le réglage,
enlever le condensateur
et remettre le fusible
Brancher un multimétre
a la place du fusible
Fu 401 ou Fu 404.
Brancher entre les cosses
du porte-fusible un
condensateur de 1 uF
Reégler avec R 411 ou
R 412 un courant de
35mA+2mA
Ures = 30 mV
prise BU 403 ou BU 404
1)
|
FU4O1/404
2)
Voltmeter
m. Nullage
+ 3V
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