Akai AM-2950 - Adjusting the DC Balance; Adjusting the Level Meter Indication

No. 10
MODEL AM-2850/2950
3.2 Adjusting the DC Balance (Refer to Figs. 5, 8)
oni
6.
aa
———
VOM
or
VIVM-———
O+4
COO00 GO (LEFT)
RL
_&
MAIN
IN
,
wm
QOOOOC®
(RIGHT)
BOICICIO|
OOOO
c
OIONOIO|
OOOO
RIGHT
LEFT
(Rear panel)
Fig. 8 AM-2850/2950 DC Balance Adjustment Instrument Connection.
Disconnect
the
jumper
plugs
from
the
PRE
OUT
and
MAIN
IN
terminals
on
the rear panel.
Keep
the
SPEAKERS
Switch
on
the
front
panel
in
the
OFF
position.
For
the
left-channel
DC
balance,
turn
VR2
(50kB)
until
the
input
voltage
at
the
MAIN
IN
(LEFT)
terminal
is
around
0
V.
Turn
VRL
(50kB)
until
the
output
voltage
at
the
SPEAKER
A
(LEFT)
terminal
is
around
0
V.
Repeat
Steps
(3)
and
(4)
until
the
input
and
output
voltages
are
within
+)
and
£20
mV,
respectively.
Similarly,
adjust
VR2b
(50kB)
and
VR1b
(SO0kB)
for
the
right-channel
DC
balance
until
the
input
and
output
voltages
at
the
SPEAKER
A
(RIGHT)
terminal
is
within
+1
and
+20
mV,
respectively.
3.3
Adjusting
the
Level
Meter
Indication
(Refer
to
Figs.
9,
10,
11)
AM~2850/2950
Fig.
9
AM-2850/2950
Level
Meter
Indication
Adjustment
Instrument
Connection.