Akai AM-2600 - Page 8

VI. MAIN AMPLIFIER ADJUSTMENT
1. IDLING CURRENT ADJUSTMENT
TESTER
IDLING CURRENT ADJ
(L CHANNEL )
VR |
elie a ~
Connect a tester to Power Amp. P.C Board test point
between Pin-11 and Pin-12, and between Pin-29 and
Pin-28.
Adjust semi-fixed resistors VR-la, VR-1b until the volt-
age is 30 mV.
2. LEVEL METER ADJUSTMENT
SPEAKER
OUTPUT
AC VOLTMETER
Aubio osc °
IKHz
Fig. 6 Level Meter Adjustment
a) Connect instruments as shown in Fig. 6.
b) Turn volume control knob on the front panel until
the AC voltmeter indicates 4.9 volts (3 watts).
c) Adjust VR-3a,b so that level-meter indicates 3 watts.
(Refer to Fig. 7)
TESTER
Ae
IDLING CURRENT ADJ ("
(R CHANNEL) (4)
ui TREb
a TR3b
TRIb tT
28 0
TR4b | |
<<) TR7b 270
026
oO 23 24 25
Fig. 5 Main Amp. P.C Board M2-5432A
Fig. 7 Volume P.C Board M2-5619