Akai GX-747 dbx Service Manual

CB
NLY)
L __
F
G
H
r------7
I
SWI C!~9
I ~"",
:l}Qt' J
I I I
lfjiOHt O I
I I
....._ ___ b J
CAPSTAN MOlOR SERVO
---------------------------c---1--------------------+--.---------+-----------
----------------------------- d ___ _.__ ____________ d
-u-------------1----------------------------+-----+-__J
-k------------t------------------------t--::::----+--------.----.-------------+-1---e-J
flltHtott
2SC9-4!1LI P,O l
w
z
A
B
C
D
r- - -7
I> I
E
1- I
F
I
l _____ j
G
SR9 2/Z
H
I
J
t
K
L
N
M
1fI...!!t.._7
I
I I
1> I
t= J
TR'SS,36
ZSC9'4!1L {P,O I
.
~~
•o
:Q
r-
-,
I
'
NI
'
~: ~
I
•'
ll'IL __ -
J
---c
.
.... b
· · · · · · · · Sw•o•
~ "'
2 NO
I n_
,.,!lo P16iJ1s J10 ~ lcuEJRvwl
47K ~ :7 ,..-, 11.
I -WiCL
M-----------------------------1/
T
. " L_:J <(
I to72
SL(K,PI
if
K
'
C --
m ffi
EC 8
BC E
2SA733 2SC2130
2SC945L
M
ffl
25B764
2S0571
2S0863
2S8605
--~
+-+--++++-----+-++++-+---~ ,o
~------+--+~ ·~
SE
OR
c,
o•
SWITCH PCB
TI009D2500
. . .
. . .
~~
OPERATION
C\J
(.)
(J)
0
Q
f-
ro
(.)
Q__
25D794
2SC2336
NOTE
,UNLESS OTHERWISE SPECIFIED
ALL RESISTORS IN OHMS l/4W (Jl
ALL CAPACITORS IN µF 50 WV(J)
IFS) = FAIL SAFE RESISTORS
GX-747dbx SYSCON
SCHEMATIC DIAGRAM
NO. 2-1 16218248
73

Akai GX-747 dbx Specifications

General

Track System	4-track, 2-channel stereo
Reel Size	up to 10.5 inch reel
Type	Reel to Reel
Heads	2 x erase
Motor	1 x capstan, 2 x reel
Tape Speed	9.5 cm/s, 19 cm/s
Wow and Flutter	0.03% (19 cm/s)
Signal to Noise Ratio	65dB
Input	1 x line, 1 x microphone
Output	1 x line
Dimensions	440 x 480 x 260 mm