Technics RS-CH7 - Page 14

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RS-CH7
| SCHEMATIC DIAGRAM (Parts list on pages 25 ~ 28.)
1 2 3 4
[FE] MECHANISM CONTROL CIRCUIT [a operation circuit
Q929, 932 Q930,933 Q931,934
MSC 2458ABCTA DTAII4ESTP DTCI44ESTP
A BUS LINE DRIVE BUS LINE DRIVE BUS LINE DRIVE
-27.9V FLI(RSLOO88-F)
ka
=
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FL
DISPLAY
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ox
z
ze = BBS
og
ax 2
Q905 an Pl P2 P3 P4 PS P& PT PB PS 76 66 5G 4G 3G 26 IG F
MSC2458ABCTA x, O-O-O) @
cPi2 RESET es a a
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at
(100K
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B 0 [| 3 a ENCENOEN
(CN12)
a
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3 bs8
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age 'o | 2 2 3 &
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TEST
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3
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Q720, 726
OTCII4ESTP
SOLENOID/MOTOR DRIVE
Q7i7 o Ovswox Q723, 724 o718
2SBIO30RSTTA 3s ae ge MSAIO4B8ABCTA 2SBIO30ORSTTA
SOLENOID DRIVE Tape speed adj.
(X2, DECKE2))
MOTOR SPEED CONT. SOLENOID DRIVE
15K
R734 R727
220
Q7I9
DTCII4ESTP+Q7!19
SOLENOID DRIVE
Tape speed adj.
=)
°
2
oO
rf 805 R802
1se254TA 6 5100 Ik
He Wr
S810 (coUNTER
—1— RESET)
804 2
0.0! i
Sole (X1, DECK)
R144 o (0) ee R813 R814 RBIS RBIG REIT RBIG RBI9 RBZ0 RBZI RBZ2 RB
S
ei
rol
g20
1K
1.2K
«(1.8K
OL8K
=
o2.2K
3.3K
4.7K
6.8K
O«I2K
22K
o
820
ISS254TA
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2}
-
fof
w
- > > oe ~ a
g 0702 18S254TA (2) @ PY] aa JOs oma ]Oe% [O05 8 n& of g
= 7) (4) \ 2 o 32 3 ee sz ox ac w 1S¥.
YS ey "a of “"y On ow ao ag “e Fa oD
os * = ~ zx
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Ul
=
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Cees
aa
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el.
oo
H 2SD1302STTA | ye > a UE = xg00 72
7 MOTOR DRIVE Be bop ee es | ; (3MHz)
S _--5V re (3) (8) > -27.9V eu | -27.9V\,
0703
MSC2458ABCTA
|
a
y
:
18S254TA
M.
SELECTOR
a
0)
;
f \
e | \
dq Tape speed adj, AW ae
7 = Ps (X1, DECK B))
2 5S 58 F23MHz
«7 x=
1) @) @ @_ "O_O OOO. C) ROROLOLOLORBROROR Oe
J3 CNT J5
orl eokocle Jes yo7ia dd ajh bed
F OXOROXOMMORONO OOWOON OS.
r4--4r--4-4 5V
$ Svit i Xv 1 4 1
‘ b dh b b Bt 4
\ DY ov t CY) G i \ = A x
2 1C97I ; 1 2 ICO7IA
Lt
L
4
ro
ett
et
ape. 8 4 BL No Sees <
8 c g-2 <5 TAPE PULSE/ Zaz eSak cleat a8
es
eS
859
88
Ico7!
MaTOR
LEADER
TAPE
DET
ay
22
ple
S523
5g
Ba
ICO7IA
aoe
35 BE 9zay 8 DN6BSIALB (DECK [} BS Bo BaBe BEZZ*3 FZ ONGBSIA (0eck)
& & $ HALL Ic eo # eg a & 2 Hace ic
= a 2 g = 2 &
a St awe
[Felmecuanism
(
Deck
[})
CIRCUIT
-18-
By
MecHanism
(DECK!)
CIRCUIT
-19-