Sony XR-CA640X Service Manual ▷ View online
30
XR-CA640X
6-13.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC501 MN101C49KSC1 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
VREF–
I
Reference voltage (0V) input terminal (for A/D converter)
2
VSM
I
FM and AM signal meter voltage detection signal input from the FM/AM tuner unit (TU1)
(A/D input)
(A/D input)
3
NIL
I
Not used (fixed at “L”)
4
KEYIN1
I
Key input terminal (A/D input) LSW902, LSW905 to LSW911, S902 to S905
5
KEYIN0
I
Key input terminal (A/D input) LSW801, LSW901, LSW903, LSW904, LSW914 to LSW919,
S906, S907
S906, S907
6
RCIN0
I
Rotary remote commander key input terminal (A/D input)
7, 8
NIL
I
Not used (fixed at “L”)
9
DSTSEL
I
Destination setting terminal (A/D input) Fixed at center voltage in this set
10
VREF+
I
Reference voltage (+5V) input terminal (for A/D converter)
11
VDD
—
Power supply terminal (+5V)
12
OSCOUT
O
Main system clock output terminal (18.432 MHz)
13
OSCIN
I
Main system clock input terminal (18.432 MHz)
14
VSS
—
Ground terminal
15
XIN
I
Sub system clock input terminal (32.768 kHz)
16
XOUT
O
Sub system clock output terminal (32.768 kHz)
17
MMOD
I
Selection signal of memory mode input terminal “L”:single chip mode (fixed at “L”)
18
LCDSO
O
Serial data output to the liquid crystal display driver (IC901)
19
LCDCE
O
Chip enable signal output to the liquid crystal display driver (IC901) “H” active
20
LCDCKO
O
Serial data transfer clock signal output to the liquid crystal display driver (IC501)
21 to 23
NCO
O
Not used (open)
24
SYSRST
O
Reset signal output to the SONY bus interface (IC581) “L”: reset
25
BUSON
O
Bus on/off control signal output to the SONY bus interface (IC581) “L”: bus on
26
KEYACK
I
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
and eject keys in the power off status On at input of “H”
and eject keys in the power off status On at input of “H”
27
NIL
I
Not used (fixed at “L”)
28
BUIN
I
Battery detection signal input from the SONY bus interface (IC581)
“L” is input at low voltage
“L” is input at low voltage
29
SIRCS
I
SIRCS signal input from the remote control receiver (IC971)
30, 31
NIL
I
Not used (fixed at “L”)
32
NIH
I
Not used (fixed at “H”)
33
RESET
I
System reset signal input from the reset signal generator (IC551) and reset switch (S551)
“L”: reset “L” is input for several 100 msec after power on, then it changes to “H”
“L”: reset “L” is input for several 100 msec after power on, then it changes to “H”
34
TUNON
O
Tuner system power supply on/off control signal output “H”: tuner power on
35
BEEP
O
Beep sound drive signal output to the power amplifier (IC751)
36
PW_ON
O
Main system power supply on/off control signal output “H”: power on
37
NCO
O
Not used (open)
38
ACCIN
I
Accessory detection signal input “L”: accessory on
39
NCO
O
Not used (open)
40
TELATT
I
Telephone attenuate signal input At input of “H”, the signal is attenuated by –20 dB
41
NIH
I
Not used (fixed at “H”)
42
BUSSO
O
Serial data output to the SONY bus interface (IC581)
43
BUSSI
I
Serial data input from the SONY bus interface (IC581)
Ver 1.2
31
XR-CA640X
Pin No.
Pin Name
I/O
Description
44
BUSCKO
O
Serial data transfer clock signal output to the SONY bus interface (IC581)
45
IIC_SIO
I/O
Two-way data IIC bus with the FM/AM tuner unit (TU1), and electrical volume (IC331)
46
NCO
O
Not used (open)
47
IIC_CKO
O
IIC bus clock signal output to the FM/AM tuner unit (TU1), and electrical volume (IC331)
48
AMPON
O
Standby on/off control signal output to the power amplifier (IC751)
“L”: standby mode, “H”: amplifier on
“L”: standby mode, “H”: amplifier on
49
AMPATT
O
Muting on/off control signal output to the power amplifier (IC751) “L”: muting on
50
ATT
O
Audio line muting on/off control signal output “H”: muting on
51
NCO
O
Not used (open)
52
AMSON
O
Tape auto music sensor control signal output to the CXA2510AQ (IC301)
“L”: auto music sensor on
“L”: auto music sensor on
53
F/ROUT
O
Forward/reverse control signal output to the CXA2510AQ (IC301)
“L”: reverse direction, “H”: forward direction
“L”: reverse direction, “H”: forward direction
54
MTLON
O
METAL control in/out terminal
At initial mode: valid/invalid selection input of METAL function (valid at “L” input)
At normal mode: METAL on/off control signal output to the CXA2510AQ (IC301)
(METAL on at “H” output)
At initial mode: valid/invalid selection input of METAL function (valid at “L” input)
At normal mode: METAL on/off control signal output to the CXA2510AQ (IC301)
(METAL on at “H” output)
55
TAPATT
O
Tape muting on/off control signal output to the CXA2510AQ (IC301) “H”: muting on
Active at ATA, FF/REW mode
Active at ATA, FF/REW mode
56
DOLON
I/O
Dolby control in/out terminal
At initial mode: valid/invalid selection input of dolby function (valid at “L” input)
At normal mode: dolby on/off control signal output to the CXA2510AQ (IC301)
(dolby on at “H” output)
At initial mode: valid/invalid selection input of dolby function (valid at “L” input)
At normal mode: dolby on/off control signal output to the CXA2510AQ (IC301)
(dolby on at “H” output)
57
AMSIN
I
Whether a music is present or not from CXA2510AQ (IC301) is detected at auto music sensor
“L”: music is present, “H”: music is not present
“L”: music is present, “H”: music is not present
58
4VPRE
I
4V PREOUT setting terminal “L”: 4V PREOUT on Fixed at “L” in this set
59
VOLATT
O
Pre amplifier muting on/off control signal output to the electrical volume (IC331)
“L”: muting on
“L”: muting on
60 to 64
NCO
O
Not used (open)
65
FLASH_W
I
Internal flash memory data write mode detection signal input terminal “L”: data write mode
Not used (open)
Not used (open)
66
TESTIN
I
Setting terminal for the test mode “L”: test mode, normally fixed at “H”
67
RCIN1
I
Rotary remote commander shift key input terminal “L”: shift key on
68 to 73
NCO
O
Not used (open)
74
EEP_SIO
I/O
Two-way data bus for tuner EEPROM with the FM/AM tuner unit (TU1)
75
EEP_CKO
I/O
Two-way bus clock signal for tuner EEPROM with the FM/AM tuner unit (TU1)
76
COLSEL
I
Setting terminal for the illumination color
“L”: amber, “H”: green Fixed at “L” in this set
“L”: amber, “H”: green Fixed at “L” in this set
77
SWSHIFT
O
VCO shift control signal output to the FM/AM tuner unit (TU1) for SW
“L”: EXCEPT SW, “H”: SW
“L”: EXCEPT SW, “H”: SW
78
DOORSW
I
Front panel open/close detection signal input “L” is input when the front panel is closed
79
DOORIND
O
LED drive signal output of the MD disc slot illumination and Z indicator (LED801, LSW801)
“H”: LED on “H” is output to turn on the LED when front panel is opened
“H”: LED on “H” is output to turn on the LED when front panel is opened
80, 81
REIN1, REIN0
I
Dial pulse input of the rotary encoder (RE901) (for VOLUME control)
82
XKEYON
O
A/D converter power control signal output terminal
When the KEYACK (pin wh) that controls reference voltage power for key A/D conversion input
is active, “L” is output from this terminal to enable the input
When the KEYACK (pin wh) that controls reference voltage power for key A/D conversion input
is active, “L” is output from this terminal to enable the input
83
ILLON
O
Power on/off control signal output of the illumination LED and liquid crystal display driver
(IC501) “H”: power on
(IC501) “H”: power on
32
XR-CA640X
Pin No.
Pin Name
I/O
Description
84
REL
I
Rotation detection signal input from supply reel sensor and take-up reel sensor on the mechanism
deck
deck
85
POS3
I
86
POS2
I
87
POS0
I
88
POS1
I
89
LMLOD
O
Motor drive signal output to the loading motor drive (IC351) “H” active
(For the loading direction and forward side operation) *1
(For the loading direction and forward side operation) *1
90
LMEJ
O
Motor drive signal output to the loading motor drive (IC351) “H” active
(For the eject direction and reverse side operation) *1
(For the eject direction and reverse side operation) *1
91
TAPEON
O
Power on/off control signal output of the loading motor drive (IC351) and capstan/reel motor
(M901) “H”: motor on
(M901) “H”: motor on
92
CMON
O
Capstan/reel motor (M901) drive signal output terminal “H”: motor on
93
NOSESW
I
Front panel block remove/attach detection signal input
“L”: front panel is attached, “H”: front panel is removed
“L”: front panel is attached, “H”: front panel is removed
94
NCO
O
Not used (open)
95
DAVSS
—
Ground terminal (for D/A converter)
96 to 99
NCO
O
Not used (open)
100
DAVDD
—
Power supply terminal (+5V) (for D/A converter)
Tape position (EJECT/FF/REW/REV/
FWD mode) detect input from the tape
operation switch on the deck mechanism
FWD mode) detect input from the tape
operation switch on the deck mechanism
POS3: “L”: REV and EJECT mode, “H”: others mode
POS2: “L”: REW mode, “H”: others mode
POS0: “L”: EJECT mode, “H”: others mode
POS1: “L”: PLAY and FF in FWD mode, and REW
POS2: “L”: REW mode, “H”: others mode
POS0: “L”: EJECT mode, “H”: others mode
POS1: “L”: PLAY and FF in FWD mode, and REW
in REV mode, “H”: others mode
*1 Loading motor control
STOP
LOADING/
FORWARD
EJECT/
REVERSE
BRAKE
LMLOD (pin il )
“L”
“H”
“L”
“H”
LMEJ (pin o; )
“L”
“L”
“H”
“H”
Terminal
Mode
33
XR-CA640X
7-1. CHASSIS SECTION
SECTION 7
EXPLODED VIEWS
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference num-
ber in the exploded views are not supplied.
• Accessories are given in the last of the elec-
trical parts list.
NOTE:
• -XX and -X mean standardized parts, so they
may have some difference from the original
one.
one.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts Color Cabinet's Color
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
1
X-3381-588-2 PANEL ASSY, SUB
2
1-792-195-11 CABLE, FLEXIBLE FLAT (14CORE)
3
X-3377-621-8 LOCK ASSY
* 4
1-676-603-21 SUB BOARD
5
3-040-990-01 BUTTON (EJECT) (Z)
6
3-935-003-01 SPRING, TORSION
7
3-027-437-12 DOOR, CASSETTE
8
X-3376-699-6 GEAR ASSY
11
3-376-464-11 SCREW (+PTT 2.6X6), GROUND POINT
* 12
3-046-991-01 SPACER (COVER R)
* 13
3-046-990-01 SPACER (COVER L)
14
3-040-995-21 COVER
15
3-012-859-21 CAP (25), RUBBER
* 16
3-045-878-01 PLATE (TU), GROUND
* 17
3-045-877-02 CUSHION (TU)
* 18
3-244-934-01 INSULATED PLATE
19
3-040-994-31 CHASSIS
20
1-776-207-82 CORD (WITH CONNECTOR) (POWER)
22
3-042-244-01 SCREW (T)
F781
1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) (10A/32V)
#1
7-685-793-09 SCREW +PTT 2.6X8 (S)
#2
7-685-791-09 SCREW +PTT 2.6X5 (S)
#3
7-685-792-09 SCREW +PTT 2.6X6 (S)
#4
7-627-553-28 SCREW, PRECISION +P 2X2.5
MG-25F-136
#3
#2
F781
#1
#1
#1
#4
#3
#3
#3
front panel section
main board section
1
22
22
3
2
4
5
6
7
8
19
14
13
11
17
16
15
20
12
18
• Abbreviation
EA : Saudi Arabia model
TW : Taiwan model
TW : Taiwan model
Ver 1.1
Click on the first or last page to see other XR-CA640X service manuals if exist.