Akai GX-747 dbx

2. COMPOSI TI ON OF VARIOUS P.C BOARDS
1) Pre Amp P.C Board Tl015A5050, Equalizer P.C Board Tl009D530A and Bias Adjust P.C Board Tl009D530B
- ,.
"-r~-
1
WHT
CD I I 28
~t
2
WHT /L OMG BLU
29
o: !-
c:~
~ L-J
m
E C B
2S0863
ffl
E C B
2SC945
2 SC 2909
2S C3068
2SCl844
~
2S8856
~
8 C E
2SCl 312
~
E C 8
2S8764
2
3
4
_J
nT
ltt Ol
IU04 o C~
~T oo o
~ o ~ O ~
. ..
.. ,
. ..
-
0
"'
:;'
I
!OUTPUT I
,...,-:,. V ltT-1
ltl
~
VIIM
IC !
----
11•~ -
------
I•: _;- :·
NJ M4 ~~0
- .
11.10 4, c !>4li. ....
~ -iJ.- o o a
C4 1'
........
...
a:
"'
u
0.
8
~
mi•"
~ I ~
·I ••
% % %
...
lct;2 3 IJ4
"--r~
"
) TIMER START/
jMONlTOR I
n.rE
N
..
"'
:;'
Q 7 -!/2ln
il NORMAL
PLAY-OFF-.._FIEC SOURCE
.0. EE
D 8 C
GCMk-29EK8
---'-
..
,....,
1• •,
lz• I
'• • I
'-'-'
PRE-AMP PCB Tl015A5050 J.
TRl4------- 2SC2909(R,SI WHT/:;:ss BlU ..:
TR 2.4-- - - ---2S8764 lE,fl -~-
0
a:
"'
u
a_
W AR NI NG: 4:,/N DICATES SAFETY CRITICAL C0 '.1 PONENTS FO R _CONTI NU ED SAFE T Y,
REPLACE S>.FET'Y CRIT IC AL COMPONENTS ONLY WIT H MAN UFA CTURER 'S
RECOMMENOE.0 P,i,.RTS
TR 1 -- -- --- --2SC3068
TR3,8,9- -- -- 2SC863 !E, Fl
TR4 ,26-- - ---ZSC l312 {G,H.I
TR ~,12,13,16 , 21 1o 23
- - - - -2.SC943U P,cn
TR6------ 2S8836(8,Cl
TR 7, 23- - - - -2SCl 3! 2R (G,Hl
ju ~
1
~
1
1
N
I t
TRl9,20----- 2SC943L WH.T /l. ON G SUI -ds"
TR 2:7--- - ---2SCl312 (GJ J t j 3 - 2 CD! H!© 2 3- 4 I
._ __ o. __ ,::_J '-"'- ~ _,::,_; L__.J
~
AV ER T!SSE~()E ~: M1i~{~ ~:~ ~i ~\SG~~~oittJ:1~f~~t~£~ ~~~ ~~IJ R1Tl
NE REMPLAC ER Q UE DES Ptf.CES RECOMMANOEES PAR LE FABR IC ,1>,N T
"'
z
z
0
~
i
"'
a:
>
w
"'
CZ
........
. ,
---
"
........
u
---
RIGHT
i
o,-
.
EQUALIZER PCB Tl009D530A
~--
, ,,. 0 -
(•
"'
..
"'
u
a_
z
0
~
F
,----@D--,
gm §TI
"' u
..
"'
w
I;;
:,
G
0
LOCATION OF COMPONENTS
TR
TR I -- -- G2
TR3----E4
TR4----F2
TRS----E4
TR6 to 8--F'4
TR9----G4
TRI0,1 1--H0 2
TR12----C3
TR13,J4-- C2
TRl6--- A2
TRl9---C2
TR20---82
TR2J--- 82
TR22 , 23--B3
TR24,25 --E 2
TR
26,27- - F2
TRlb---G4
TR4o---F4
TR! Ob ,l! b- 04
TR l2b - - - C3
TR l3 b,1 4b-C4
TRl6b---A2
TR 26b,27'o -F4
IC
ICI----A3
TERMINAL
P4----B1
PS-- -- E4
PG, 7- - - 03
P8,9--- F3
PI0 -- -84
Pl l, t2 ---CI
J I ci::
~7 "'
--(I t >)-'==~=--,< I u
t)-""-'"- ""' "---'=--,(!Jj~
--i!•r ==~=---1l.eJ1 z
17 4 J ><:
i..,; _ J t
----------,----------------------------------SERVICEMANUALGX-747dbx------.------------------------------------
43