Technics RS-X933 - SCHEMATIC CIRCUIT DIAGRAMS; CIRCUIT SCHEMATICS FOR MAJOR SECTIONS

RS-X933. —- RS-X933
Hi
SCHEMATIC
DIAGRAM
1
2
3
4
5
6
7
(Parts list on pages 29~35.)
L¥ main circuit
(This schematic diagram may be modified at any time with
important
for
safety.
When
replacing
any
of
these
R933
4.7K
o1,2
Q901
H
development
of
new
technology.)
2s
GSEORIA
eSCos
Hl
AQSTA.
1439
Q90
1,
bee
—
PLAYBACK
A
TPI2
eo
4
GAIN
ADJ.(Lch,OECK
B)
GAIN
ADJ.
(UL
ch,DECK
A)
Notes:
;
?
a
<>
Re
ST
x30
P20
-5.5V
x
_
*S701:
DECK
B
Stop
switch
in
“off”
position.
ee
ST
ofa
yy
||
(es
SO
Os
re
eee
Pitches
ame
*°S702:
DECK
BF-.F.
switch
in
“off”
position.
23
283
(DA
|
*
2)
tah
om
©
*S703:
DECK
B
Rew.
switch
in
“off”
position.
okt
l.,
as
vee
¢$704:
DECK
B
Playback
switch
in
“off”
position.
-
oe
L
-
ns
°S705:
DECK
B
Rev.
Playback
switch
in
“off”
position.
1
wPy
ge
SSP
Re
S
a
jail
R
sonninn
¢S706:
Reverse
mode
selector
switch
in
“off”
position.
Rch
C=
ae
ov
ov
7 Ov
ov
¢
S708:
DECK
A
Auto
rec.
mute
switch
in
“off”
position.
$
20m
ae
=,
bef
*S711:
DECKA
Stop
switch
in
“off”
position.
DECK
B
sa
:
E
¢S712:
DECKA
F.F.
switch
in
“off”
position.
B
Ge
ee
oe
¢S713:
DECKA
Rew.
switch
in
“off”
position.
[
inna
PSAs
a
eB
be
|
ic
:
°S714:
DECKA
For.
Playback
switch
in
“off”
position.
PDRYERCIG
HEAD
SwiteninoreLaviowy"
ANT384
|
1c2
e$715:
DECKA
Rev.
Playback
switch
in
“off”
position.
Dee
—
§
¢S716:
DECKA
Record
switch
in
“off”
position.
~
ws
¢$717:
DECKA
Pause
switch
in
“off”
position.
ceeds
(NC
le
eee
ee
ere
rea
|
°S718:
Synchro-start
switch
in
“off”
position.
:
ae
°S719:
Editing
tape
speed
selector
(X2)
in
“off”
position.
[~
es:
ae
25h,
hae
$720:
Editing
tape
speed
selector
(X1)
in
“off”
position.
ee
pail
ny
Sse]
<
¢32
180P
€31
180P
¢S721:
Dolby
NR
C
switch
in
“off”
position.
ner
eee
oeo1
SST
Pe
TER
BS
abe
©
$722:
Dolby
NR
B
switch
in
“off”
position.
Cc
[
—
ay
RAT
*S725:
Power
switch
in
“on”
position.
Ren
sf
—
:
=
2
:
©
S726:
Timer
switch
in
“off”
position.
Wet
te
a
=
aah
zy
ee
/
e
$951:
DECKB
Mode
switch
in
“off”
position.
so08
Bg0P
oy
|
Gos
GAIN
ADJ.(
Rch,DECKA
e
S952:
DECK
BCassette
half
detection
switch
in
“off”
position.
a
idee
Bese
Se:
S953:
DECKB
ATS
(CrO,)
switch
in
“off”
position.
rence
goles
shot
°
Ras
BB,
oe
SOR
SETA
=
e
S971:
DECKA
Mode
switch
in
“off”
position.
HEAD
-
ai
;
a
BIAS
OSC
CONTROL
ef
epee
°S972:
DECKACassette
half
detection
switch
in
“off”
position.
(Len
_
el,
ia
One
=
°
°S973:
DECKA
Rev.
Rec
Inhibit
switch
in
“off”
position.
Preouency
[|
-|~—
38
TEs
|
a904,,,
cig
aes
28
Pe
Clee
pte
Se
NS
cay
°S974:
DECKA
For.
Rec
Inhibit
switch
in
“off”
position.
eer
en
35
way
I
2
mal
a
*
Ops
any
°S975:
DECKA
ATS
(CrO.)
switch
in
“off”
position.
D
alg
ce
Y
=
soeee.
DECK
A
ATS
(Metal)
switch
in
“off”
position.
DECK
AE
RASE
7
el
sl:
e
:
f
é
g8-
ay
¢
Resistance
are
in
ohms
(Q),
1/4
watt
unless
specified
TEST
POINT.
“|
oe
33
2
oo
tah
otherwise.
-
_
=
a2
io
ie
3
=79V
HO,
ie
ea
ay
”
.
-
0301302
EDIE
fou
F258
0303,
it
“lak
apacity
are
in
micro-farads
(uF)
unless
specified
otherwise.
2SC3311AQSTA
ROIS
_pb0s
a
.
.
.
.
BIAS
OSC
CONTROL
270
MAI65TA
+——
*
All
voltage
values
shown
in
circuitry
are
under
no
signal
Power
Supply
For
(EG)
area,
axes
a
condition
and
playback
mode
with
volume
control
at
minimum
|
(EB,
GNJ
only
2SD592QRSTA
SRO,
SMALGSTA
cet
:
ae
pa
ee
BIAS
OSC
CONTROL
we
positlon-otherwise:specitied:
te
eka'
|
aes
28A
1309AQSTA
25A1309AQSTA
288
1309AQSTA
(
)
SAden
2
ara
Voltage
values
at
record
mode.
|
acourtes
#3
soe
eben
SWITCHING
(X2
70/1208)
SWITCHING
(METAL/CrO2)
MOTOR
SPEED
CONTROL
For
measurement
us
EVM.
}
(UNSW
ITCHED)
eines
a
BIAS
OSC
CONTROL
a
¢
Important
safety
notice
E
‘at
aay
Components
identified
by
A
mark
have
special
characteristics
|
!
A
AC 220V
components, use only manufacturer’s specified parts. (50/60H2) Ag é 5 a Arcos
o(
m—umme<+B>emmmmm
)indicates
+B(bias)
00000000
ERR
a
==
fe
arco!
(AReir
Ne
an
ey
2ivfa6Ol
sae.
|
s—
aa
gai
pier)
r
?
:
\
BEb8E
oe
ao
Bx
i
8x
¢( meee <—B> mem ) indicates —B (bias). | @ A Ty oie B47 ee et 185 ga <ovy, HES) oh oan gs
. ) indicates the flow of the playback signal. ae 25 BSS O65, 2s es,
i
i
i
To
AMPLIFIER
as
eS
-
U2.1V)
So
o(
oc
)
indicates
the
flow
of
the
record
signal.
|
(POWER
SUPPLY)
z
=
32
ita
=o
ra o ON >
| \ 3 2/48 “8
*
Caution!
[
stasla
s}as
ge
’
S¥8sY g8ABs g
IC
and
LSI
are
sensitive
to
static
electricity.
F
ee
Ses
Brest,
ah
bs
ged:
TBE
eee
. . . = roy = pad “4
Secondary
trouble
can
be
prevented
by
taking
care
during
repair.
-
For
others.
8
oor
EPS
(x1,
DECK
A)
*
Cover
the
parts
boxes
made
of
plastics
with
aluminum
foil.
8
ay
5
See
ce
see
tae
OTCiaceie
*
Ground
the
soldering
iron.
Set
lasaunere.
.
nek
a6oa
Fea.
Conte
Pr
UMeC
ed
corte
s
3IAQSTA
2SD2037EFTA
_
4!
2805920RSTA
*
Put
a
conductive
mat
on
the
work
table.
STABILIZER
STABILIZER
REGULATOR
|
Sa
|
REGULATOR
*
Do
not
touch
the
legs
of
IC
or
LSI
with
the
fingers
directly.
en
Lee
yy
de
@
b
(EB,GN} Q915,917
255/557 DFTA oni? reusesre = tii deste
SOLENOID DRIVE
—19-— G — 2 —