Akai GX-221D User Manual

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SECTION 1
SERVICE MANUAL
TABLE OF CONTENTS
SPECIFICATIONS
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4
MEASURING
METHOD
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6
1.
TAPE
SPEED
DEVIATION
1.0...
00
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6
+
WOW
AND
FLUTTER
..
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6
3,
FREQUENCY
RESPONSE
....-
0.0
ce
ete
eee
erence
etes
6
4
RICNAL
TO
NOISE
RATIO
\-soidw
doo
poh
oe
OR
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6
5.
TOTAL
HARMONIC
DISTORTION
FACTOR
....-0..00
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tee
7
6.
CROSS
TALK
(Cross
talk
between
the
channels)
.
06-66
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@
ERASE
RATIO“
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6's
289
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Uk
OE
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7
8.
POWER
OUTPUT
.....
bi
an
seg
this
duds
wee
bie
ut
RUE
ec
OHS
AR
VCE
ERAGE
SD
2
7
DISMANTLING
OF
UNIT
.......000
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B
-
TRANSPORT
MECHANISM
...-.-0-
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10
if
FORWARD
PLAYBACK
RECORDING
MODE
......
Pe
er
ee
ee
ae
it
.
FAST
FORWARD/REWIND
MODE
......-
20sec
eee
ere
ee
teeters
11
:
BLOCK
DIAGRAM
OF
VOLTAGE
SUPPLY
CIRCUIT
TO
MOTOR
AT
EACH
MODE
....
!1
4.
SYSTEM
CONTROL
CIRCUIT
OPERATION
,..
0.2000
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13
MECHANISM
ADJUSTMENTS
........-0
0-0-0
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eee
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cereeee
Sid
Sore
eee
14
1.
REEL
TABLE
HEIGHT
ADJUSTMENT
..
0.0...
0s
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eee
eee
eee
ets
14
2,
PINCH
WHEEL
PRESSURE
MEASURING
METHOD
Aiki
ated
rks
he
eine
bee
14
3.
BRAKE
TENSION
ADJUSTMENT
..
2.0.0
eee
ee
eter
eres
15
4,
SUPPLY
VOLTAGE
AND
TENSION
AT
VARIOUS
OPERATING
MODES
......----
15
HEAD
ADJUSTMENTS
.......
sos
se
ttn
od
athchv
a
du
Ns
fet
desc
Goad:
Saal
oS
taass
teh
16
1.
HEAD
HEIGHT
ADJUSTMENT
.......
0.0002
te
eee
reese
BAG
Parity
arg
ites
anette
16
2,
HEAD
AZIMUTH
ALIGNMENT
ADJUSTMENT
....
26-02
-
seer
ees
17
AMPLIFIER
ADJUSTMENTS
1.0.0.0
00
cece
ee
teeter
eee
eee
18°
1.
PLAYBACK
OUTPUT
LEVEL
ADJUSTMENT
......000
00
ee
eee
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rece
ree
18
3.
VU
METER
SENSITIVITY
ADJUSTMENT
.....
St
dnokudiend
upesoe
ata
peated
18
3.
HIGH
RANGE
VARIATION
CHECK
2.0.0.0
2.
cee
eee
et
eet
nneee
18
4.
RECORDING
LEVEL
ADJUSTMENT
..........
Bacio
Gaerne
ein
Aiae
&
Bitte
Bushs
21
5.
RECORDING
BIAS
FREQUENCY
MEASURING
METHOD
.........--
2022s
2
6.
RECORDING
BIAS
VOLTAGE
ADJUSTMENT
(Frequency
Response
Adjustment)
.-....-
21
_
AUTOMATIC
NOISE
REDUCTION
AMPLIFIER
ADJUSTMENTS
(GX-225D)
......-+++22
i
AN
RAMP:
ADTUSTMENT
6a.
as-eGice
XS
So
hae
ae
Sed
a
SES
Si
are
Ee
Be
22
‘>.
A.N.R.
OPERATION
AND
CHARACTERISTICS
...-...---00-035
Bie
phan
Readers
23
COMPOSITE
VIEWS
OF
COMPONENTS
.....
2-22-02
e
ete
rece
rts
tte
24

Akai GX-221D Specifications

General

Brand	Akai
Model	GX-221D
Category	Tape Deck
Language	English