Sony XR-CA640X Service Manual ▷ View online
XR-CA640X
18
18
6-2.
BLOCK DIAGRAM – MAIN Section –
A
B
MPX
AM
C
TAPE L
R-CH
CNJ151 (1/2)
BUS
AUDIO IN
L
R
PDL
AM/MPX2
SDA
SCL
EXT-ATT
4
9
TAPE-L
44
AMIF
10
MPX
12
LOUDNESS
VOLUME
IIC BUS
DIGITAL
CONTROL
INPUT SELECT,
ELECTRICAL VOLUME
IC331
SOFT
MUTE
TONE
CONTROL
17
MPIN
19 20
R-CH
INPUT
MULTIPLEXER
OUTPUT
SELECTOR
27
OUTLR
MONO
FADER
28
OUTLF
MIXER
PILOT
CANCELATION
AM/FM NOISE
BLANKER
D/A
CONVERTER
DEMODULATOR
STEREO ADJUST
STEREO BLEND
HIGH-
CUT
LPF
PILOT DET
LPF
QUAL
S & H
PLL
LEVEL
14
13
QUALITY
16
D
SDA, SCL
SDA
SCL
SYSTEM CONTROLLER
IC501 (2/3)
59
47
IIC-CKO
45
IIC-SIO
TELATT
VOLATT
ATT
40
66
E
LEVEL
CNJ151 (2/2)
AUDIO OUT
FRONT
L
R
MUTING
Q181
MUTING
Q171
11
12
RL-IN
15
16
22
4
RR-IN
AUX
MUTE
STNBY
FL-IN
14 FR-IN
POWER AMP
IC751
5
3
21
23
FL+
FL–
FR+
FR–
7
RL+
RL–
17
19
RR+
RR–
CN781 (1/2)
1
9
FL+
FL–
FR+
FR–
RL+
RL–
RR+
RR–
4
2
12
10
3
11
TEL-ATT
13
TEST
15
9
LEVEL SHIFT
Q583
AUDIO OUT
REAR
L
R
R-CH
R-CH
(FRONT)
R-CH
(REAR)
LINE DRIVER
IC191
TESTIN
AMPON
AMPATT
BEEP
• SIGNAL PATH
: AM
: FM
: TAPE PLAY
: BUS AUDIO IN
PULSE
FORMER
MUTING
CONTROL
Q621, 622
BUFFER
IC292
BUFFER
IC192
35
50
49
48
• R-ch is omitted due to same as L-ch.
(Page 17)
(Page 17)
(Page 17)
(Page 17)
(Page 17)
XR-CA640X
19
19
SYSTEM CONTROLLER
IC501 (3/3)
82
REIN1
KEYACK
26
KEYIN0
REIN0
81
80
KEYIN1
RCIN0
RCIN1
4
5
6
67
KEY ACTIVE
SWITCH
Q551
D501
D553
AD_ON
LSW801, 902, 904
− 907, 911,
LSW913, 915, 916, 918, 919
ROTARY
ENCODER
RE901
BACKUP +5V
(VOLUME CONTROL)
J561
(REMOTE IN)
93 NOSESW
DOORSW
78
CN901
(FRONT PANEL SIDE)
S552
(NOSE DETECT)
CN701
(MAIN UNIT SIDE)
1
8
OSCOUT
OSCIN
XOUT
XIN
12
13
16
15
X501
18.432MHz
X502
32.768kHz
LCD-DATA
LCD-CLK
99
96
LCD-CE
OSC
98
LCDSO 18
LCDCKO 20
19
LCDCE
OSC
C953, R991
LED DRIVE
Q631
LCD DRIVER
IC901
3
−
86
SEG01 – SEG84
90
−
87
COM1 – COM4
LIQUID CRYSTAL
DISPLAY
LCD901
BACKUP +5V
RESET SIGNAL
GENERATOR
IC551
BATTERY DETECT
Q581
6
8
4
CLK
CLK IN
DATA OUT
DATA
I/O
2
RST
RESET
SWITCH
BUS ON
SWITCH
13
11
1
BUS ON
BUS IN
12
9
DATA IN
SONY BUS INTERFACE
IC581
BATT
BATT B+
BUS ON
DATA
CLK
RESET
7
6
5
4
2
RST
3
BATT
BUSCKO
BUSSO
BUSSI
RST
BUS ON
BU-IN
BUSCKO
BUSSO
BUSSI
RST
BUS ON
BU-IN
BATTERY
SWITCH
10
B/U-C
28
25
44
BUSCKO
43
BUSSI
42
BUSSO
24
33
THP501
D582
D581
RESET
REMOTE CONTROL
RECEIVER
IC971
29 SIRCS
SYSRST
BUIN
BUSON
S551
CN581
BUS CONTROL IN
ACCESSORY CHECK
Q571
ANT+B
TU+B (8V)
REGULATOR
IC611
COM8V
TU+B (5V)
TUNER8.7
STB
16
BATT
F781
ANT REM
6
CN781 (2/2)
COM +8V
(AUDIO CIRCUIT B+)
TU +5V
FM/AM TUNER UNIT
(TU1) B+
TU +8V
VCC
7
7
ACC
REGULATOR
CONTROL SWITCH
Q633
B+
SWITCH
Q601, 602
FRONT PANEL B+
LED901, 903, 912, 914,
LED917, 931, 941,
LSW902, 904
− 907, 911,
LSW913, 915, 916, 918, 919
2
TUNER5.6
3
4
9
BU+B
BACKUP +5V
D552
5
10
11
8
AMP+B
6
TUNON
PW_ON
83
ILLON
34
36
DOORIND
LED801, LSW801
LED801
TAPE DECK
ILLUMINATION
LSW801
Z
79
BATT B+
POWER AMP
(IC751) B+
AMP REM
5
D610
D611
38
ACCIN
RESET
100
6-3.
BLOCK DIAGRAM – DISPLAY/KEY CONTROL/BUS CONTROL/POWER SUPPLY Section –
XR-CA640X
20
20
2.6 Vp-p
21.6
µ
s
3.2 Vp-p
54.2 ns
5.1 Vp-p
30.6
µ
s
6-4.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
C
: panel designation.
•
A
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
no mark : FM
(
) : AM
[
] :TAPE PLAYBACK
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
E
: TAPE PLAYBACK
L
: BUS AUDIO IN
• Abbreviation
EA
: Saudi Arabia
TW
: Taiwan
Note on Printed Wiring Board:
•
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side)
the parts face are indicated.
• Waveforms
– MAIN Board –
– MAIN Board –
1
IC501
qs
(OSCOUT)
2
IC501
qh
(XOUT)
– KEY Board –
3
IC901
oh
(OSC)
XR-CA640X
21
21
6-5.
PRINTED WIRING BOARD – MAIN Board –
(FM/AM TUNER UNIT)
FM/AM
ANTTENA IN
AUDIO OUT
REAR
BUS AUDIO
IN
AUDIO OUT
FRONT
25
1
2
24
IC751
BUS CONTROL IN
CN581
(REMOTE IN)
(NOISE DETECT)
SUB BOARD
1-680-157-
11
MAIN BOARD
B
CN301
3
2
1
TP(L-CH)
TP(R-CH)
TP(GND)
R209
R210
C209
R110
R109
C109
C111
C211
S501
FREQUENCY
SELECT
9k (50k)
10k (200k)
(EA, TW)
(E)
C
D
E
F
G
H
I
J
K
L
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
A
D1
F-12
D351
I-13
D352
I-13
D501
K-8
D502
G-10
D552
H-12
D553
K-9
D581
G-13
D582
E-12
D584
C-14
D585
C-13
D586
C-13
D610
F-10
D611
F-10
D613
F-11
D614
E-11
D622
E-7
D701
L-4
D702
K-4
D703
K-4
D704
K-5
D705
L-3
D706
G-5
D707
K-3
D708
K-3
D709
L-3
D710
L-4
D711
L-3
D712
L-5
D721
D-9
D722
E-9
D723
D-10
D724
E-9
D731
E-8
D732
E-9
D733
E-9
D734
D-10
D781
E-13
IC191
F-4
IC192
D-5
IC291
E-6
IC292
D-6
IC301
J-5
IC331
G-5
IC351
J-14
IC501
I-9
IC551
L-11
IC581
E-12
IC611
G-14
IC751
C-8
Q171
C-5
Q181
C-4
Q271
C-6
Q281
C-5
Q351
J-13
Q352
I-13
Q353
I-12
Q354
H-13
Q551
K-8
Q571
E-9
Q581
G-13
Q583
G-10
Q601
K-13
Q602
K-14
Q621
F-7
Q622
F-8
Q631
L-6
• Semiconductor
Location
Ref. No.
Location
(Page 25)
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