Akai AM-2950 - Page 11

MODEL
AM- 2850/2950
WATTS
(88)/d)
WATTS
(82)/d
Fig.
10
AM-2850
Level
Meter.
Fig.
11
AM-2950
Level
Meter.
Rated
outputs:
85watts
(AM-2850)
and
120
watts
(AM-2950)
on
each
channel.
Set-up
des
mn => WN
Connect
an
AF
oscillator
to
the
AUX
jacks
on
the
rear
panel
of
the
each
model
as
illustrated
in
Fig.
9.
Connect
an
8-ohm
load
across
each
SPEAKER
A
terminal
as
illustrated.
Connect
an
AC
voltmeter
across
the
load.
Set
the
SPEAKERS
selector
to
the
A
position.
Set the BASS, MIDRANGE, TREBLE, and BALANCE controls on the AM-2850 or the
100 Hz, 400 Hz, 1,000 Hz, 4,000 Hz and 10,000 Hz controls on the AM-2950
to their mechanical centers ('0').
6. Throw the MODE switch into the MONO position (lower).
7. Keep the LOUDNESS switch in the OFF position (upper).
8. Set the SELECTOR switch to the AUX position.
9.
Set
the
AUDIO
MUTE,
FILTER
LOW
and
HICH,
and
TONE
switches
to
the
OFF
position
(upper).
Procedures
1. Turn on the AF oscillator and the model under adjustment.
2.
Set
the
AF
oscillator
output
frequency
to
1,000
Hz
and
the
level
to
150
mV.
3.
Adjust
the
VOLUME
control
on
the
front
panel
until
the
VTVM
reads
26.1
V
for
the
AM-2850
or
31.0
V
for
the
AM-2950.
4.
Now,
adjust
VRS
(Left)
and
VR4
(Right)
on
the
Main
Amp
P.C.
board
(see
Fig.
until
each
POWER
LEVEL
meter
deflects
to
the
mark
'85'
for
the
AM-2850
or
'120'
for
the
AM-2950
(see
Figs.
10,
11).
5)