Sony TC-WR690 - Simultaneous Recording; Recording on Both Decks at Once

e iC Block Diagram
IC806, 807 MC14052BCP
=
OQ
a
Note:
@ Alli capacitors are in wF unless otherwise noted. pF: uwuF
SOWV or less are not indicated except for electrolytics
and tantalums.
e Ali resistors are in Q and ¥/,W or less unless otherwise
specified.
A: internal component.
Voltage is dc with respect to ground under no-signal
conditions.
no mark: PLAY
( ): REC
%* =: Impossible measurement point
@ Voltages are taken with a VOM (input Impedance 10M Q).
Voltage variations may be noted due to normal produc-
tion tolerances.
5-5.
SCHEMATIC DIAGRAM—SYSTEM CONTROL SECTION—
1 2 3 4 5
(PANEL BOARD (1/3)
—~Ofri cy
— AE
-%
FL9901 FLUORESCENT INDICATOR TUBE
“QPLAYR= <@PLAYR _
|| B SKIP Hil M
-20 bd 0
dB -30 -10 4
Toone |
Ro4S
12%
=. a po DECK B ——;
R944
R940 R341 RaAe ROKS 5.9k OHoOO
Ot
ist] [2h] ©
tr DECK A}
R934 R935
1k 1. 8k
a
s
a’ valp
« p>! [el
(AMS) (AMS) 986
39
_—_ 4
5
a)
$92
KEY.2
4
OoO- NM tN OR © n
o.0
+4
d
+8
uo-
OFF BC
R948
12k
YY V
[3
OFF -»B—-» C
HIGH] [NORMAL A+B REC
—— SYNCHRO DUBBING ——
R926 R927 R928
150 220 330
R947
470
KEY. 4
$926
DIR MODE
= +© —» REPLAY
MEMORY] [RESET] [MEMORY] [RESET]
peck a! L—peck pg —
R7S0 2. 2k R791 2. 2k !
R792 2.2k
Has
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Ratostta ttt
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Gi
2 GR
GR GR
GR
METAL (B} RO
1C901
M50941-714 - SP
AMS SELECT A MD.SO
6.1
6
R910 3.9k R9OG 22%
Qs0s
28C3901
C903 0. tk
=:
4M. IN
Q90!
BUFFER
10
11
12
13 14
‘X SW A BOARD 1S FOR COMMON DECK A AND B ONE SIDE OMITTED
S
SYSTEM CONTROL
BOARD ( 2/2)
|
7
IC802 ms50925-4825P
5.3
3
0
1C902 1
REMOTE
SONSOR
0905, 906
1cal
NJL5165K~-B
HUT OFF
DET
(DECK A)
OY © ©
$85 S84 S83 $82
mM kJ <] <] <j
R8i 560
{DECK B)
(—) (@) () @) @yp°
| =
=
R788 1k
R789 1k
SWITCH
Q90é
2502604
R951
100K R352
100k
SYSTEM CONTROL
FL DRIVE
04
ve
@}
TO SYSTEM
CONTROL BOARD(I/2)
(See page 19.) (See page 21.)
0 SYSTEM
CONTROL BOARD (1/2)
8402 2601
@
TO SYSTEM
CONTROL BOARD (1/2)
(See page 19.)
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Be
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METER es et
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rer ea a
RELAY DRIVE
WAVE SHAPE
SYS-7. SV,
+5.3V
A et
IC804
MC 140S0BCP
15
SYS+7.5V
iq
R812 20k
Q805,806
INPUT SELECT
C808 3350p
C809 330p
[@tsi@low RBIs 30k
MOTOR DRIVE Bn
+
A.SCLBY ON/OFF «———
A.DOLBY B/C
|_| SYS+5. 3V
ees
MECHANISM
CONTROL
R.MUTE (B)
R869 10k
-_—
B.BOLBY ON/OFF
16 17
casi
0.47% SOV
=
Q801,802
CAPSTAN CONTROL
R831 16k
9803,804
SPEED SELECT
NORMAL/HIGH
BIAS (A)
BIAS (B)
1C806,807
MC14052BCP
B/C
8. HOLBY
5
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SYSTEM
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|
ONTROL
BOARD(1/2)
1:
S¥STEM
TO
SYSTEM
(See page 20.) CONTROL BOARD (1/2)
(See page 19.)
CONTROL BOARD (1/2)
(See page 21.)
18 19 20
21
(DECK A)
(DECK A)
REEL +
eres TO SYSTEM
+5V & CONTROL BOARD(I/2)
gly (See page 19
-7Vi MOTOR) pag )
i}
i
o B)
REEL +
REEL —
TO SYSTEM
Mine © CONTROL BOARD (1/2)
-7V
(MOTOR)
(See
page
19.)
AU+7. SV.
REC EQ SWITCH
70U
X1 XCOM xd
10807
NC14052BCP
(-6.5)
=<" DIRECTION
TO SYSTEM
CONTROL BOARD(I/2)
Eine (See page 19.)
—2,.6V
RELAY
TYPE
(See page 21.)
REC EQ SWITCH
lB | TeG5y TO SYSTEM
Geel AU-7. SV —7.5V CONTROL BOARD (1/2)
2S Ge eae iis
bie aah pe eee a ha To SYSTEM
eee eee ee | ee ee on
TYPE |
rT
RELAY
(See
page
20.)
es ee ES) |
# DIRECTION
mo HH
33k 8.2k
TYPE
dl ~ ~2,6V
TO SYSTEM
A
(DB)
CONTROL
BOARD(I/2)
-3.5) 10806 — (6.5)
NC140SZBCP
(See
page
19.)
1
7.7
899
25A1 348 \
SWITCH ir)
NY (77)
BIAS |
(DECK B)