Read Sony XR-CA640X Service Manual online
XR-CA640X
17
17
1
2
FM-ANT
AM-ANT
2
VSM
AMSIN
14
S-METER
10
MPX
8
AM-DET
FM/AM TUNER UNIT
TU1
SYSTEM CONTROLLER
IC501 (1/3)
17
SDA-EEP
J1
(FM/AM ANTENNA IN)
5
VCC
TU +8V
16
VDD
TU +5V
11
EEP VDD
74
SDA, SCL
MPX
A
AM
B
LEVEL
E
BACKUP +5V
EEP-SIO
18
SCL-EEP
EEP-CKO
SDA
SCL
7
SW SHIFT
77
SWSHIFT
SDA
12 13
SCL
D
TAPE EQUALIZER AMP,
DOLBY NR AMP
IC301
37
39
R-CH
PBF
IN2
IN2
PBFB2
FWD
L-CH
HP901
(PLAYBACK)
FWD
R-CH
REV
L-CH
REV
R-CH
PBR
IN2
IN2
R-CH
R-CH
R-CH
R-CH
R-CH
R-CH
EQ AMP
2
4
MUTE
DOLBY
NR AMP
PB
OUT2
TAPE
IN2
IN2
AMS
DET
+
19
DRSW
18
TAPESW
20
INSW
DOLBY
MSMODE
7
LINE
OUT2
14
MS
OUT
TAPE L
C
• SIGNAL PATH
: AM
: FM
: TAPE PLAY
REGULATOR
CONTROL SWITCH
Q352
CAPSTAN/REEL
MOTOR DRIVE
Q353, 354
TAPON
CMON
VCC
REEL SENSOR B+
BATT B+
BATT B+
IN1
IN2
OUT1
OUT2
LOADING
MOTOR DRIVE
IC351
92
M
M
M901
(CAPSTAN/REEL)
9
7
MOTOR
DRIVE
3
4
1
LMLOD
89
LMEJ
90
+9V REGULATOR
Q351
91
(LOADING)
TAPE OPERATION
SWITCH
BUFFER
TAKE-UP
REEL
SENSOR
SUPPLY
REEL
SENSOR
REEL SENSOR BOARD
REL
84
87, 88, 86, 85
POS0 – POS3
TAPE
DETECT
EJECT/FF/REW/
REV/FWD MODE DETECT
75
57
AMSON
52
DOLON
MTLON
54
F/ROUT
53
16
17
D1
TAPATT
55
56
40
DOLBY LEVEL (L)
RV101
(Page 18)
(Page 18)
(Page 18)
(Page 18)
(Page 18)
• R-ch is omitted due to same as L-ch.
9
DESTSEL
BACKUP +5V
10k (200k) 9k (50k)
S501
FREQUENCY
SELECT
(E)
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – TUNER/TAPE Section –
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