Technics RS-CH7 - Page 10

EVM
(Electronic
Voitmeter)
NR OUT)
EVM = Oscilloscooe
m@ BLOCK DIAGRAM
RS-CH7
AN7351SC
021~ 23,058 se)
A :
a Ren] BUFFER AMP
ELECTRIC
VOLUME
ae
vei]
1
i 21
(7)
De® [> @ ine
LINE iN LIo2ziL202) | 3 OUT
(Leh) CXAI33IM-TS | aa |
cam | shrew] f he ie
ey
DOLBY B/C NR 3 f+ | Love |
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pee je _|7 le eS ia iz dit —; l
ATT = 9 if |
| Be S vee |
REC
|
J
|
conjrol 8A4558F TI | = |
(C7 (1/2) pe | |
as] |
13
~ |
7 FLI
fa
jiheiee
Pin
No.
of
AN7351SCE2
|
right
channel
(C2
(1/2)
MS
selector
|
|
FL
Displa
2) REC/PLAYBACK AMP control + LL J ¥
-—<— ore —_—— - — —— 4.-
[oPPLAYBACK SIGNAL } SAdasaeTi 0151016) (29)
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ee
36
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1
a9
42
2 _ VR3(VR4)
(PLAYBACK GAIN ADJ.)
]35 DECK! 26.29
DECK! (8) lint 22~25,34 31N33
PLAYBACK HEAD q , (soc ate ge oe lemmas 1
(Uch) 33, (PLAYBACK GAIN PEO~PH3 PGO~PH2 |
&
AwAL
$810
|
|
(COUNTER RESET)
--—---4+-- VRS(VR6)
03104) Led r Aree seer! sal LC65I2A-4604 |
Switching ! | { | [r17T2 +42 M50963-238SP ro PB2 10801 |
(play .on} Bay, ’ 0907 & 1C901 -_
aie
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HI
is
0903
‘
|
FL
DRIVE
|
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Playback (OVERALL
@= [Payee --—- I GAIN ADJ. } | Vss Voo PB3 Pcl PCO RES osc2 osc) I
| a a Qe a eed
pee Shots 26 < i 17 39 ri 3 2 Tis 21 20
VR7 (VRB)
DECK2 { C és)
R/P HEAD + (31)
(Leh) $ oto 2
| 3 U
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[sa = 9 é (3MHz}
| | LMT O= >
i ses7a P| |
(ATS/Cro2k
I
05,7,9, 11,13
L (06,8110,12,14) |
Selector
|
(
Normal/METAL/Cro2)
a928
‘i
|
j LU ewe serear $2 __.
| { 0905
——~8$ aut2 | Reset
| | agser 68 + drive 48)
|
:
0903
I
me
——
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931
énia
a r-
| Clock control - B.CLK
| CLK pUT §23__ ot
|
| ‘ | 9321934
SSS
a
24
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LS control
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: 25
a POWER IN O=
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VR303
(VR302)
(BIAS CURRENT ADJ.)
DECK 2
4
0303, 304,904, 0904~907
Bias OSC
control
SO76A
{ATS/METAL) 9
S975A
(ATS/CrO2)
ai
VR301
(CONSUMPTION
CURRENT
L3ol ADJ. }
9301, |302
ERASE HEAD x +
—Ht
TP30I
3
Bias OSC
-12—-—
DECK
-
REC2
®
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SOTI(MODE)
a
£24
MODE
|
SO72(HALF)
on
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HALE
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I
DNG6SS5IALB
|
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ef
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F
717,719
|
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e72:
VR721
(SPEED ADJ.) Q723
Motor speed
contro}
ssil~ 82i
KEY 22 fey aren } ey awe | switch
|
|
!
|
39
!
MODE
2d:
_B—~o
SOTIAIMODE}
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|
!
HALF
2de2
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SI7ZA
(HALF)
|
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|
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604
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|
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Pres
Q601,
604
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°
Q603,
605
1
|
|
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720
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a
re
tia
i
|
pac
IN
830,83!
D83I~
834
trae
VR722/VR723
(SPEEO ADJ.)
DECK2
Tape pulse’
leader tape det.
-13-
4
l
4
<=>: Recording signal
' 1
i t
(rh ee 4