Akai SR-425 - Schematic Diagram

AC=220
~4C=320
KEY/DISPLAY SCHEMATIC
DIAGRAM
CN401 TO CN305 POnR AJIP/EQ P.C.B
RH
Rs
8
9 r~1o, iii
!
11
I!~
I
0
!!
• ii!
REMOTE
SENSER
-
R429
~n;1~~
R441
~
560 f (
R435
750
1/4\,'
560
D401
~ R459
D41f~~
E§
.
,---0 ~S;:1413
D402f (
~ 9014C ~ lK
C403j_
R492:•
---;=;0 ~
e,...
Gl401
'
0.01 - -
4.7K R430
...
C420
.. ~ ~ t-
56_0. m
~'""'
l40!
t C401
0.22/SOV ... ex,
......
~~~414
•n
Gl407
lOOUH
90!4C
-Q ~S~402
f;i
R436
6
0,1
R477
C405
R479
l;JR480
~
0408
~r-;-o:;
11....---0 t D403S~
~:
560
K
2cM
22P(J) 2.2K '•
4.7K
~~ ~
. ; ~ ...
~
-
.u. .L ig
~.
R460
n
D42!
"'ai
:'o'~~415
D404f ~~
~ lK.
o~T
IN4148
,.,.,
rh
~~S~403
~~4ll
~
9014C
~ :4;i[)~ D~ ~
Gl402
"
X402
R493
.__~ ~
~~ 0
......_
h,.o fl
R431 ,-,-,
8MHz
!OK
ru "'
-·~ ,.... 0
0
~~S~4!6
C402
,{)~!
... r--
560
11
~~ ~W404
◄ ~~~412
47/6,3
R449
...
I
~sl
~~ ~
f--0 fl
D416
N
4K.~
X401
--~ ~
>-f--0 ...
.__
D405f ~
~ iG
9:
• R437
_....,.,., ....
1~H~rZ>--AZ>--
32.768KHZ
C
= 560
..
I IC401 I
~ ::i5:c5~c
~~a~
Sl.'408
ti
R49:S
~ >C ~&..
:,:,,:
~~
R452
.;
ST24COI >--
-
IK
CD PHIJT □ IN ~
d
>-<
s
D406JG~ 9014 ~
1
~.
I
R442~
0
\.ill:
TAPE
51
33K
..AA
SEL B
TUNE:R
'
!
~
Rl>I CU(
CD!
R4!6
R432
Gl403
co
,:::y
~ "'
-
...
RIJ4 DATA
c:oz
R413
R414
R415
...
R496
SELA
CD3
560 r.'7
... "'
,.. ru ..,. ru
.
3.3K
3.3K
3.3K
3,3K
~
"' -
C<(lj
"' cu
IK
VOL STB
S-BASS
~
VOL DATA
DIGI
It
""
VIL CLilC1<
DIG2
D4I7
R438
~
'NCA
0
R497
R499
PLL DUT
DIG3
D407f G
~ 1G
~:
~
PlL CLOCK
fi~
560
!OK
10K
PLL IN
PLL CE
DIG6
~
'--,
R453
~
TUNER MUTE
IC403
D!G7
-
.tR49B(G
CD PCNER
D!G8
s
D408;Q~
90!4C
~ !~ ••
-
Gl410
MDTllR CNT4
M3B1B4-XXXFP
llIG9
k)~~421 ,
kl ~~423 •
~ ~S~426
MOTOJ! CNT3
DIG10
H) ~Sr17
Gl404
..
'
~
9014C
MOTtJI CNT2
DIGII
R433
MOTIR CNTI
DIG
~~~
h::D ii!
CD 1CRS[T
D!Gl3
'--
f-;.O~
,_
1--::0 s ~
560 '"
' lOK
CD MUTt
DIG14
~ ~
o:; "'
~~
~
,.,
CDSQSO DIG15
- ~
'
N.C
DIG!
... C\J
... C\J
....
D41B
R439
CD SQCK
SEGI
~ru~Sl.'418
~~~421 . ~~~42• •
~~~427
...
D409JG
~ fQ
~:
TRK ~llJ SET
SEG2 .
560
~I
R4'5
OVER LllAD IN
S£G3
~
CD D~TA
SEG4
._
~I a ,_
~ I.. ........
""'° e
~
R454
!OK
CD Ct.I(
.... SEG5
~I
'--,
CD XL7
1:4
SE
N >
ru "'
;~ ~
D4101 G
9 9014C
~lK_
I-,
-
- KEY 1
>--
SEG
◄
... ,-. ... ,-.
.... r--
(.)
~~S~419
~~t4e, ,
w~~42" I
~~1,'428
~ ~~ICEY2 ~ 5 ~
SEGB
'
'
~~· ~~ili:~~~i~~~§
I I I I I I I I
k) i
0405
-
k) ~
-0 cl -
k) 5 L-
R434 ,-, •
.........
~
>
500
... ,
I I i 1
..
tiG
D41! f G
~:
R440
R425 R426
R427
R428 560
R445
R447
•R490
!OK
....
4.7K
~
R450
FLT
lOK !OK
!OK
t")
'--,
R455
4,7K
... "'
s
D412 !G 9
~IK
~~
R473
!OK
90!4C
lUK
t:i
..
0406
'
>
l",7
► •R491
*tfZ
MIC VOL
...
.,
"'
E
HI SW:~
.I._
►
►
►
f
!;i
"'
"'
C410
C411
"
"
"
0,01
47/6.3 MIC JACK
□~~ *
'
r-0
I
'
'
'
'
.fTlllTl"--i
--
-
.
.
"~
R463 R464R465 R466 R467 R468 R469 R47~ ..
C421
~
R474
•R•Bo
*RU1
TUNlfR VERSION
47K 47K 47K 47K 47K 47K 47K 47K
4700P<H>
lOK
OPBN
0
B BAND .u,,,..nr ll'l'EP:6,,.,,_r,1/C
,_,
...
B,2C
1L41C
-
MIC Slol
6.61{ 8IC IIBAND
,_,
4. ?E 4.1K II BAND 'IC/ISK
11K IS.a JI 11AND nr/111T S'J'ZP:t0Oir/lOK
/Ult' B.RIC -
0
OPEN -
AKAl-01249 / Druck 1
39