Akai GX-230-D Service manual
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SECTION
SECTION ] PARTS
SECTION 3
I
SERVICE
SCHEMATICDIAGRA}Í
TAPE DECI(
GX.23OD
MANUAL
LIST
TO
\IODEL
....
GX.]30
I
23
.tl
I
I
SPECIFICATIONS
II.
DIS\I\NTLING
III.
.\RR-\,NGENÍENT
IV.
}fECHANISNÍ
I. .\DJUST}f
]. BRAKE
3.
.\DJUST\ÍENT
.I.
.\DJUSTIvÍENT
.i.
.\DJUST}IENT
6. HEIGHT
:
.\DJUST}IENT
8.
.{DJUST}IENT
9.
.\DJUSTillENT
10. .\DJUST\Í
\.
HEAD
VI.
.\}IPLIFIER
I PO\\'ER
:.
T\PE
3
RECORDING.
VII.
D.C.
RESISTANCE
VIII.
CLASSIFICATION
I. P C. BOARD
]
CO\IPOSITE
SEtrIVICE
OF
OF TÍAIN
ADJUSTIIIENT
ENT
TENSION
.\DJUSTMENT
ENT
.\CTIVATOR
.\DJUST\ÍENT
SYSTEM
SUPPLY
SPEED
ADJUSTNÍENT
PLAYBAC]K
OF VARIOUS
INTERCIIANGE,\BILITY
VIEWS
SECTION
TABLE
UNIT
PARTS
OF PINCH \\'HEEL
ADJUST\IENT
OF
REEL
TABLE
oF
CAPSTAN
OF
II,IPEDANCE
OF
TENSION
OF
RECORDING
oF FF
oF
PLAY
POSITION
ADJUSTI\IENT
VOLTAGE
OF VARIOUS
OF
\{oToR
ROLLER
OF
TAPE
ARN{
SLIDE
MICRoSwITCH
\ilcRoswtrcH
ADJUST},ÍENT
.
AMPLIFIER
COILS
P.C.
('O\IPONE\TS
I
MAI\ITJAL
OF
CONTE\TS
PRESSURE
HEIGHT
SHAFT LooSE
SHAFT LOOSE
GUIDE
BOARDS
ON TENSION
\f ICROSWITCH
SWITCH
(SW.-s)
(sw-r
.\DJUST\IENT
CIIART
(SW-IO)
.\CTUAToR
¡nd
PL.\Y
SW-9
SW-il
PLAY
,
.{RM
POSITION
TI\ÍING...
PoSITION
r
. .
l
-t
6
7
7
¡l
9
9
t0
l0
il
ll
t2
lz
¡3
l5
t5
t5
l6
l7
l7
l7
l8
[:r.i
i'r:lc.idJusin]cnts.
(;E\ER.\L
OPER.\
ntc.lsLlnng ntetltods. lnd
f IN(; I'RINCIPI-ES .\\D
opc:-,l:^ltg
,\I)JL'S
f\IENTS
prlltelDic's.
rcfer lt.r
I. SPECIFICATIONS
I
An astersk
TRACK SYSTEM
next to a
figure
TAPE SPEED
WOW & FLUTTER
WOW & FLUTTER
TOTAL
FREQUENCY
DISTORTION
TOTAL DISTORTION
SiN RATIO
TOTAL S/N
RESPONSE
RATIO
OUTPUT
INPUT
RECORDING/PLAYBACK
TALK
CROSS
ERASE RATIO
FREQUENCY
RECORDING
BTAS
HIGH FREQUENCY
RECORDING
FAST FORWARD
\IOTOR
HEAD
BIAS
LEAK
DEVIATION
TIME
AND REWIND
COMBINATION
indicates the
LEVEL
RECORDING/ERASE
minimum
TIME
MAIN MOTOR
}IOTOR
REEL
PLAYBACK HEAD
guaranteed
i 4 track 2 channei
LINE
DIN
MIC
LINE
DIN
HEAD
performance.
svstem
stereo
7-ll2
and 3-314
*'l-ll2
ips.
*3-3l4
ips.
Less than 0.07%
Less
than 0.i%
*Less
than 0.l0Vo at
*Less
than 0.I2%
*
Less
than 0.15%
*Less
than 0.l8Vo
*Less
than 0J2%
*Less
than
23,000 Hz
30 to
30 to
19,000
22.000 Hz
30 to
to
30
18.000
Less
than 1.07o
Less than 1.5% at
Less than
Better than 54 dB
*Better
*Better
0.775V
700 Hz
25% at 3-314
than 50
than 45
(0
"0"
x0.7%
ips.
(19
(9.5
0.I8%
Hz
Hz
t
dB/O t 1.5
I
VU Prerecorded
xl.Mo
crn/sec.)
cml
at
RMS.
3-3/4
RMS. at
7-Il2 iPs.
at'l-ll2
at 3-3
at 3-3/4
7-ll2 ips.
at
at 3-314
t3
at
dB
t3
dB at
t3
dB at
t3
at3-314
dB
7-ll2 ips.
i
dB
dB
4 ips.
dB.
0.5v
\f
than
ore
More
More than 3 mV
(at
"0"
0.775V
Better than 40 dB
(1,000
Better than 70 dB
(1,000
100 t 10
Better
Within 3 dB
(8,000
90
minutes.
Approxrmately 120 seconds,
2
speed
Type:
Revolutions: 6 l5
Two
Type:
Revolutions: 930
| 1,120
Type: RE4-6
Gap:
lmpedance:
D.C.
Type: P4-202
Gap: 1.7¡r
Impedance: 1,400
D.C. Resistance:
mV
0.3
70
than
mV
VU
output,
(0
t
dB)
1.5
+3
VU
Hz
+3
VU recording)
Hz
kHz
-30
than
Hz.
SCM2-24K1,4
6-pole
24XGMR
Resistance:
dB
ipt.
3-314
stereo
A.C. Servo
(19
307.5
(9.5
eddy current
Rec:
4¡¡
Erase: Double
Rec: i,400
Erase: 130
t0.51
recording
recordi
ta
recording,
Conuol
pole
r.p.m.
cm/sec.)
r.p.m.
cmisec.)
r.p.m.
r.p.m.
ohmt25%
ohm
Rec:
Erase:
at
ohm
ohm
268
7-ll2iPs.
ips.
FWD
REV
ips.
FWD
REV
iPs.
ips.
ips.
7-ll2
ips.
3-314
7-ll2 ips.
i
FWD/REV)
output
tape,
volume
using
a 1.800
using
Rotor
Outer
ips.
7'Ll2
at
at 3-314
Rotor
Outer
Hz
50
at
Hz
60
at
GaP
at 100
t7% at lO0kÍlz
ohm
5.5
ohm
1.8
kHz
I
Akai
lwith
(with
Akai
volume maximum'
maximum),
ft. tape
a 1,800
ft. tape
Motor
iPs.
Motors
kHz
LN Tapel
LN Tape)
7-ll2 ips'
at
¿1!9
FIz.
I
TRANSISTOR
2SA564(PXQ)
2SC4s8LG(C)...16
2SC945(PXO.
2SC1247A...
DIODE
1N34A...2
10D05...4
... I
toDl
10D2...+
10D4...5
STK-015
POWER
SUPPLY AND POWER CONSUMPTION 100
to
A.C. 50
240V
A.C. 50
220V
A.C. 60H2,90W
l20V
A.C. 50/60
100V
RecorderTvoe:
DIMENSIONS 441(W) x
(l'7.4"x15.9"x8.3")
Dimensions
GX-230D
cX-230
NOTES: l.
Specificaüons determined
2.
Specifications Subject
with
Scotch #2ll
to change without notice.
tape
unless otherwise
.. . i
. .
I
(GX-230
. . .2
240V A.C.
Hz, 90W
Hz. 90W
l20W
404(H)
include
15.2
16.7
20
only)
Hz, 90W
50/60
BSI
CEE
CSA
60/65W
Hz.
210(D)mm
x
ail
(33.4
ks
(36.7
ks
noted.
2SD361(DXE)...1
2SD361(DlXD2)...1
.
TlP48.
15-1588...
. 1
1
ls-2473VE...
RD-sA(M)...1
582...1(GX-230only)
Universal
Models
Models
Models
Models
JPN Models
lbs.)
lbs.)
r
II.
DISMANTLING
In
case of
in
reverse
trouble,
order.
etc.
necessitating
HEAD
COVER
OF
UNIT
ciisassembly, piease
disassemble
in
the order
shown rn
photoeraphs.
I
Reassemble
':
:
---oII
Ft t=t
o
NCH
ROLLPI
ER
CAP
rftsf
O-O
¡
ffiE
SCREv'jS
:^
iuBBER
-,tlOT
i
CONTROL
KNOBS
-RONT
F]\EL
OO
D
gt,
-l
I
I
ADJU-S-:'If
NT
T
]CNNECTION
{ffi
¡
PLUGS
-tl
q"ffi
_.¿J*i
:?.i
-
:-f--¡'-
:.RE\,VS
-
AfvlP
BLOCK
I
ARRANGEMENTOF
III.
MAIN PARTS
-
GFi,
rlf
-
g-
E
,'tt'=
3
---
.1t--
t#-=
-ñ'
,r'6
FAST
s
2
:ssiMELY
HEAO
BLOCK
ELOCK
S iV'9
SUTTCN
't ó
:
TENSICN
KEY
a
"¿¡U5E
RIGHT REEL MOTOR
:ERVO :CNTROL
3OARD
:t
VAIN MOTCR
?EC,
BOARD
i5c. a[4P
-'¡sc.
I
SOARD
MY- 2C36
^v c,¡/ ?
iF
SW5
SW,
MY-2044
r-:-'6
lt'1
EC.
oc,
/B
1-
!
I
REEL
LEFT
POWER
POWER
30ARD
MOTOR
TRANSFORMER
PC.
S"PPLY
'lY-
2037
tü
P
C
T
IV.
MECHANISM
FIXATION
ADJUSTMENT
SOLENOI
D
SCREWS
-BRAKE
LEVER B
BRAKE LEVER
_-l8Oo-.
SCREW
SCREW
CAPSTAN
A-
-
C
SHAFT
@
O5mm
X
SPRING
-J
sw-4
''AT
STOP
F iq,2
ENT
I. ADJUSTNÍ
SURE
I ) Unfasten Microswitch
2)
3) Adjust
(Refer
ment Screws C and C'.
play
At
Brake
Lever
relation to each other. If necessary, adjust
angle by
prnch
re-positioning Plate A and
OF
to Figs. I and
mode,
confirm
B are
changrng
wheel
Play
pressure
"
MOOE
PINCH
1VHEEL PRES-
2)
(SW4)
placed
Activation
that Brake Lever A
at a 180"
Solenoid
to
1.5
B.
Angie
Adjust-
and
in
angle
the
(SL-l) position.
t0.l
kgr-cm by
PINCH WHEEL
4)
Then,
the clearance
SW4
microswitch
Fig. 2.
at stop
(with
fasten
mode.
between
time delay)
approximately
is
the body
and C' so that
C
screws
of Microswitch
the actuator of the
and
mm as shown in
0.5
SOmm-
I
BRAKE
BRAKE
ERAKE DRUM
A
v
BAND SUSPENSION
BAND .
METAL
X Confirm thot
coírpl€loly
boih ore
soporoted
Fig.3
METAL
Fig.4
2.
BRAKE
Figs.
l)
As
wound on
brake tension
Deviation of
50
2)
Brake
tion
TENSION
3 and
shown
gr-cm.
tension
the
of
4)
in
Fig. 3, use
a 5" reel
to
approximately
left
and right
can
Suspended
ADJUSTMENT
a
60mm
and
set
tension
be adjusted
Spring.
diameter
both
left
350 gr-cm.
must
by changing posi-
If necessary,
(Refer
tape
and
right
be within
change
to
the position
replace the
3)
At all modes except
neither of
around the
of the
spring.
the brake
brake drums.
Spring
Suspension Metal or
stop mode, confirm
bands touch the cloth
that
tape
T
ñEEL
IAELE-
MAIN
tt
t;
/
MOTOR-
-
IHRUST SUPPORT
ANGLE
REEL TABLE
,I
F|XATION
SCREWS
Fig.
5
3.ADJUST}ÍENT
(Refer
I ) Properil'
2) Fasten
NOTE:
to
Fig.
5)
load
indicared
optimum position
by the
Reel
Tape
less
Table Fixation
should
of type
OF
a tape
arrow
at
wind
reel
REEL
and
ma¡k in
F.
FWD
on
used.
TABLE
move
Fig.
Screws to
and
center
HEIGHT
the
reei table as
5.
maintain
RWD modes.
of reel
resard-
4.
ADJUSTMENT
SHAFT
As shown in
an
0.5 mm degree of loose
moved
LOOSE PLAY
Fig. 6, adjust
adjustment washer
hand.
by
CAPSTAN MOTOR
OF
the loose
(U
type) to obtain
play
when the capstan
piav
by inserting
a 0.3 to
shaft is
X'O.l
to O.3nm
Fig.
t
7
,
A&JUSTMENT
lfl':,i:
slightly
5. ADJUSTMENT
SHAFT LOOSE
tuming adjustment screws A and B
Adjust
obtain a 0.1 to 0.3
shaft is moved bv
NOTE: Both A and B screws
by
this
procedure.
lT'a
OF IMPEDANCE ROLLER
PLAY
mm degree loose
hand.
\
(Refer
to
must be tiehtened after
Fig.
play
7)
when the
l=__1_IAPE
'i--'i
HEIGHT
6.
ON
to
Adjust
inserting
Fig.
euide.
ADJUSTMENT
TENSION
the height
adjustment
an
tape
that
8 so
ARM
of Tape
GUTDE
t
TENSION ARM
ADJUSTMENT
WASHER(U
fh€
X'L¡ff
slighl ly
Guide
washer
travels on
TYPE)
gu¡do
8
Fig.
OF TAPE
on Tension
(U
the center
type)
as shown
GUIDE
Arm by
in
of the tape
l0
Switch Potñi
mtcroswt?cñ
for
I
REC. PUSH
lncluding
X
o I lowonce
EUTTON
bock
SLIDE SWITCH
.ICTIVATOR
lhls
X Bend
INTERLOCK
i-y¡6pg
Port
(TENSION
ANGLE
r
SWTTCH
SW,
SWITCH SLIOER
SLIDE
SWg
)
Fig.9
SPR I NG
x.Just
contocls
Fig.
SACK
l0
PART
7.
ADJUSTMENT
SWTTCH
Cont'irm
SW-g POSITION
that the microswitch
OF
indicated in Fig. 9. If
switch to obtain optimum
TENSION ARM
operates at the
necessary,
position.
move the
MICRO-
position
micro-
ADJUSTMENT
8.
the
switch
(SW.IO)
in Fig.
slide
slider
the REC Push
SWITCH
'fu
strown
bending
slide
part
of the slide
this time.
At
OF
10. adjust
Switch
just
switch.
RECORDING SLIDE
TIMING
the switch
so that the
Activator
comes
Angie
in contact
is fully
Button
with the
depressed.
timing by
back
ll
F E
MICRO
(sw-5)
SWITCH
SWITCH
I
LEVER
9.
ADJUSTMENT OF FF
(SW.s
At stop
Slide
and
0.3 mm or
ACTUATOR POSITION
)
mode.
Plate so
the
body
just
the
move
that
the clearance
of the
comes in contact
T2
}ÍTCROSIVITCH
microswitch
between
microswitch
as
actuator
the acruator
is
approximately
shown in Fig. I l.
on
FF
I
O. ADJUSTMENT OF PLAY
(SW-7
and SW-l I ) ACTIVATOR
As shown
microswitch activators on Play
clearance
the
microswitches
in
between the
12, at stop
Fig.
activator and
is approximately
MICROSWITCH
POSITION
mode, move the
so that the
Plate
Slide
porches
the
1.0 mm.
of
V.
HEAD
ADJUSTMENT
'@*'o'
REV. PLAYBACK
P4-2O2
HEAO
@,o,
,0,@,r,-
COMB(REC./ERASE)
HEAD RE4-6 HEAD
FWD.
PLAYBACK
P4-2O2
q
Fig.
l3
NOTES:
perfect
I
As
)
top
these adjustments
Be careful not
2)
other magnetized
3) Use only new tape
occur when using
4)
Demagnetize heads
before and after head
head
tape deck
adjustmenrs
perforrnance.
properiy
are
use
to
a magnetized screw
tools
in the
as level
old tape.
with
adjusrment.
vitai
are
piease
carried out.
vicinity
variation
a
Head Demagnetizer
in
attaining
be
sure
driver
of the heads.
is likely
that
or
to
13
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