Sony TC-WR690 - Relay Recording; Continuous Recording Across Decks

5-6. SCHEMATIC DIAGRAM—MD SECTION—
1
2
3
4
5
6
7
8g
9
10
11
12
13
Note:
lama
=
——_—_—
SO
@
All
capacitors
are
in
uF
unless
otherwise
noted.
pF:
uwuF
‘CMD
HX
BOARD]
5OWV
or
less
are
not
indicated
except
for
electrolytics
aie
Ts
ee
ae
and
tantalums,
bal oy ; e All resistors are in Q and 1/,W or less unless otherwise
ma specified.
® Voltage is dc with respect to ground under no-signal
conditions.
a no mark: PLAY
CAPSTAN ( ): REC
MOTOR
e@ Voltages are taken with a VOM (Input Impedance 10M).
Voltage variations may be noted due to normal produc-
tion tolerances.
@ Signal path.
>> :PB
>> : REC
‘X MD HX BOARD IS FOR COMMON DECK A AND B, ONE SIDE OMITTED.
HRPE 101
RECORD/PLAYBACK/
ERASE HEAD
c7l
Q7| \y
MOTOR SPEED
CONTROL
| af M2
irk REEL MOTOR
@<0) TO AU GND
as
O
090090
©
[TRANSLATION BOARD]
+7.5V
+7.5V
L
CHIPB)
L
CH
(PB)
GND
(SIGNAL)
GND
(SIGNAL)
R
CH
(PB)
R
CH
(PB)
BIAS
OSC
abies
a
27.50
REEL
+
REEL
+
REEL
-
.
+5V
HIGH
6
HIGH
-7V
(MOTOR)
=)
-7V
(MOTOR)
2SA13
48
MUTING
DOLBY
HX
PRO
BIAS
)
BIAS
L
CHIREC)
L
CH
(REC)
GND
GND
R
CH{REC)
RELAY
(DECK
A)
bg
+5V
+5V
DIRECTION
3
DIRECTION
QUICK
:
x
QUICK
oR
w
~2.6V
TYPE
y)
=
TYPE
Ss
2
oa
2g
&
x
4
°
cas
:
100p
&30V
o
i
=
a
B30
S89
S
&
eae
!
é
PEAK
A
45eo
2o8t@5Z
oagn5*
bE
ee
oe
Abr
zn
&Z2eCgntse
eno
oO
is
EF
zew
+
BGS
'
he
=
cg
a
Pee
Ss
x
1005
€30V
é
one
vee
p
+X
"
:
ae
a
“
2
(DECK
A)
=
ua
mo
t
33
TO.
SYSTEM
TO
SYSTEM
=
CONTROL
BOARD
CONTROL
BOARD
pases
o-oln
S
(i/2)
CNBOS5
(1/2)
CN804
TO
SYSTEM
“
CONTROL
ae
(-6.3)
(See
page
19.)
(See
page
19.)
BOARD
(1/2)
CN502
pee
ee
2
.
ee
(See
page
19.)
04
eS
=20>