Akai GX-4000D

2. MODEL GX-4000DB
ae
ae
cae
Seaver
Mode
ss
Result
Remarks
_
sat
Playback
700
Hz
cs
—2.5
dBm
‘
Level
7-1/2
ips
PLAY
|
VR4
50kB
+0.5
dBm
pa
Sytch.
to
Adjustment
Test
Tape
(380
mV)
%
na
VU
Meter
700
Hz
Gan
2
Sensitivity
7-1/2
ips
PLAY
VRS
1kB
renee
Adi
Test
T.
indication
FLIpIBLK)
Fu
(ey
djustment
est
Tape
REC
ve
a
FILTER
REC
AMP
BIAS
FILTER
SCOTCH
#211
Adjust
to
aS
leah
.
ocd
1}
Frequency
tape
1,000
Hz
+1
dBat
Tape
Speed
to
3-3/4
ips.
ped
17}
P
A
.
an
<<
PLS
tBLK)
3
Response
10,000
Hz,
ae
he
rae
10.000
Hzin
|
Set
EQ
Switch
to
:
aa
SO)
OKHz
FILTER
Adjustment
-20
VU
relation
to
3.3/4",
DOr
oor
:
recording
1.000
Hz
19KHz
FILTER
4
a
MBB
1oKa
1,000
Hz
~2.5
dBm
t
Monitor
Switch
t
eon
ti
OVUfrom
|
STOP
eas
OSM
ccc
Recording
an
oscillator
m
(530
mV)
.
4
Level
=
—
+
Adjustment
SCOTCH
#211
2.5
dBm
j
:
VCl
TM8O.
3]
N
‘een
tape
1,000
Hz
eae
VR3
10kB
20.5
dBm
oe
Switch
to
0
VU
Recording
(280
mV)
:
©
FREQUENCY
|
ab
Ie
nese
Distortion
1,000
Hz
REC/
re
Factor
0
VU
PLAY
1
o%
ve2
Taos
Confirmation
recording
;
PB
Amp
Bias
100
kHz
FL2
Minimum
Set
Monitor
Switch
to
FLI
tO
FCS
6
Filter
from
an
REC
124.938
AC
Voltmeter
|
“TAPE”.
Adjust
trom
the
opposite
side
Adjustment
oscillator
an
indication
(Refer
to
NOTES
6,
7)
REC
Amp
Bias
100
kHz
Minimum
Set
Monitor
Switch
to
Filter
from
an
REC
AC
Voltmeter
|
“SOURCE”.
VR5b
{Ka
Adjustment
oscillator
BaeNee
indication
(Refer
to
NOTES
6,
7)
VU
METER
SENS
on
19
kHz
19
kHz
aie
Minimum
|
DOLBY
N.R.
Switch
to
8
Filter
from
an
STOP
07.001
AC
Voltmeter
;
ON.
Adjustment
oscillator
indication
(Refer
to
NOTE
8)
a
ae
Chart-2
VR5 'K3
=
MLE
ee
NOTES:
1.
Output
Level
Control
should
be
at
maximum.
. Except for Step 3, set tape speed to 7-1/2 ips.
. Set tape selector to Low Noise position.
. (L) = Left Channel, (R) = Right Channel.
1
Rs
3
4
5.
If
it
does
not
comply
with
the
specifications,
repeat
Steps
3,
4
anc
se-adjust.
6
7
8
FL2p
120-938 12
PB
AMP
BIAS
FILTER
PB
AMP
BIA
‘ : :
ne
ony
?
e
.
Unless
the
core
is
moved
intentionally
this
adjustment
is
not
necessary.
.
Adjust
the
oscillator’s
frequency
to
give
a
frequency
counter
reading
of
100
kHz.
.
Adjust
the
oscillator’s
frequency
to
give
a
frequency
counter
reading
of
19.00
kHz.
VR4b SOKB = VR4- SOK3
PB LEVEL PB LEVEL
{RIGHT} (LEFT)
ed
Fig. 13 Amp P.C Board LE-5701A (GX~4000DB)