Technics RS-B965

RS-B965
miSCHEMATIC
DIAGRAM
(Parts
list
on
pages
45~47,
55~58.)
(This
schematic
diagram
may
be
modified
at
any
time
with
development
of
new
technology.)
Notes:
A
¢S601:
Voltage
selector
switch
(Voltage
selector)
in
“240
V”
position.
(110V
—
127V
<—
220V
=
240V)
((GC)
area
only.)
°S701
:
Stop
switch
(stop)
In
“off”
position.
S702
:
F.F.
switch
(ff)
in
“off”
position.
¢S703
:
Rew
switch
(rew)
In
“off”
position.
°§$704
:
Playback
switch
(Play)
In
“off”
position.
¢
S705
:
Record
switch
(rec)
In
“off”
position.
S706
:
Pause
switch
(pause)
in
“off”
position.
©
$707
:
Dolby
noise-reduction
switch
(Dolby
NRC)
In
“off”
position.
¢
$708
:
Dalby
nolse-reduction
switch
(Dolby
NR
B)
In
“off”
position.
¢§709
:
Multiplex
filter
switch
(MPX
filter)
In
“off”
position.
B
¢S710
:
Timer
switch
(timer)
In
“off”
position.
¢S711
:
Counter
reset
switch
(counter
reset)
In
“off”
position.
¢S712
:
Counter
mode
switch
(counter
mode)
In
“off”
position.
¢S713
:
Meter
range
switch
(meter
range)
in
“off”
position.
¢S714
:
Memory
mode
switch
(memory
repeat)
In
“off”
position.
¢S715
:
Memory
mode
switch
(memory
stop)
In
“oft”
position.
S716
:
“dbx”
switch
In
“off”
position.
¢S717
:
Automatic-record-muting
switch
(auto
rec
mute)
In
“off”
position.
¢S718
:
Power
switch
(standby
©
/on)
in
“on”
position.
¢S719
:
Open/close
switch
(open/close)
in
“off”
position.
°
S720
:
Calibration
selector
switch
(rec
cal.)
in
“off”
position.
¢S721
:
APRS
switch
(APRS)
in
“off”
position.
°S722
:
CD
Direct
switch
(CD
Direct)
in
“off”
position.
©
$723
:
Monitor
switch
(monitor)
in
“off”
position.
¢S801
:
Motor
switch
in
“off”
position.
(Loading)
¢
$802
:
Open
switch
in
“off”
position.
(Loading)
¢S971
:
Mode
switch
in
“off”
position.
S972
:
Cassette
half
detection
switch
in
“off”
position.
¢S973
:
ATS
(CrO,)
switch
in
“off”
position.
¢
$975
:
Rec
inhibit
switch
in
“off”
position.
¢S976!:
ATS
(Metal)
switch
in
“off”
position.
¢
Resistance
are
in
ohms
(Q),
1/4
watt
unless
specified
otherwise.
1K=1,000
(Q),
1M=1,000k
(Q)
¢
Capacity
are
in
micro-farads
(uF)
unless
specified
otherwise.
¢
All
voltage
values
shown
in
circuitry
are
under
no
signal
PLAYBACK GAIN
AOJ. (L ch)
R427
6.2K
cu
1o1(i/2) ave
6 av
zs
4
M
K
Lt
Qind
8
ov
R2!
22K
2
2SKI7OBLVTP
PLAYBACK EQ CONT.
Rag? C47l R45!
2.2K SOV4T 1.6K
R463 18K |
1c481
CxX20187
DOLBY NR(B/C)
6.6v
cir
25
€439 0015
10
12%--<P PT
1S K--- others
C467 6800P
ool
aT
C453 4700P
O.01-- others
0.027-- (PP)
(€,£8,£6,GC,GNJ
areas
os~e
2SK38IBCOTA
PLAYBACK EQ CONT.
cr
47 6.3¥470
1C1,2
MS219L
PLAYBACK £Q AMP
RT 4.7K
Ro
felon aici
PLAYBACK
HEAD
Pe
g
Sj
eS J os t
PLAYBACK
GAIN
SI
|
AD. (Roch)
bar,
ov
a ues |
oF 3) mn poe pee pre Sem a
12K--- (PP)
15K --~ others
/ as
C464
0.068
‘560K
ti
43
)
cag
01
462
022 C466
0047
C468
6800P
ae
Cato
001
}p——}
~~ others
R468 10K
001
R460 660
(E,EB,E6,6C,
GN) areas
R452 16K
C452 680P
PesSrsery
R458 6.8K
¢460 0 015
tH
1452
d d
L------4
ce
6.3v470 47
(
2
a
<
1013
M5218L
MUSIC
SELECTOR
i
on.
Se,
9945
2SC3Z3IIAQSTA
MUSIC SELECTOR
c90! 8200P
Q616,618 Q15,16
2SD592AQRSTA 2SA1Z09AQSTA
REGULATOR REC CAL, CONT.
6.2K 0015
REST =CB8S3
F ROSS 3 6K
C637 10VI00
<
Q6I7,
619
Qi7
1C502
2SB621ARSTA
2SC331IIAQSTA
AN6294NK
REGULATOR
REC
CAL.
CONT.
dbX
AMP
R204 620
ty
C636 10v100
3.3K-- (PP)
4.7K-> others
See
-15v BD
T Bleck diagram of
indicotes Reh onl
4,
99,10
2SC331IIAQSTA
MUTING
dK it rag C23
27K
25y10
Sev
condition
and
playback
mode
with
volume
control
at
minimum
Len
©
:
position
otherwise
specified.
[
as
(FD)
rae
:
REC
GRC
PADIG
IAS
Pate
Pog
(>)
wacceiesiete
Voltage
values
at
record
mode.
a,
it
huhanide
BLY
nisr
3.9K
aK
H
For
measurement
us
EVM.
aa
Ce
a
z
7
eel
¢
important
safety
notice
|
aio
CH
<
teatis2)
2
ait
ov
Tow
7
Components
identified
by
A
mark
have
special
characteristics
eg
=
,
are
ica
ij
=
g
2a:
Important
for
safety.
When
replacing
any
of
these
Bo
ato
MS
ete
Eu
oe
-
¢
58
components,
use
only
manufacturer's
specified
parts.
|
25
1309AQSTA
ox
o(
=e
+B>=eems
)
indicates
+B
(bias).
ses
me
gga
MOTE
Ree
en
ee
|
.
°(
smem<-8>e0em
)
indicates
—B
(bias).
ai
=
7a
o(
issn
)
Indicates
the
flow
of
the
playback
signal.
i
c33,a01
oot
F
¢(
<=>
)
indicates
the
flow
of
the
record
signal.
ae
am
35
DIRECT
IN
87
* Caution!
IC
and
LSI
are
sensitive
to
static
electricity.
Secondary
trouble
can
be
prevented
by
taking
care
during
repalr..
*
Cover
the
parts
boxes
made
of
plastics
with
aluminum
foil.
* Ground the soldering iron.
* Put a conductive mat on the work table.
*
Do
not
touch
the
legs
of
IC
or
LSI
with
the
fingers
directly.
hee O->
Dine
MAIGSTA
aise t26
2m™ — 23vi0
ais
2SDI450RSTA
REC CAL. CONT.
0925
MAIGSTA
RO9T 2.2K