Sony XR-CA420N Service Manual ▷ View online
XR-CA420N
17
17
6-5.
SCHEMATIC DIAGRAM – MAIN Board (3/3) –
•
See page 13 for IC Block Diagrams.
(Page 16)
(Page 15)
(Page 19)
XR-CA420N
18
18
6-6.
PRINTED WIRING BOARD – KEY Board –
• Semiconductor
Location
Ref. No.
Location
D902
F-12
D903
F-11
D904
F-11
D981
F-8
IC901
F-7
LED907
D-2
PL901
(LCD BACK LIGHT)
PL902
(LCD BACK LIGHT)
B
C
D
E
F
G
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
IC901
12
(12)
12
(12)
(Page 14)
XR-CA420N
19
19
6-7.
SCHEMATIC DIAGRAM – KEY Board –
•
See page 12 for Waveform.
(Page 17)
XR-CA420N
20
20
6-8.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC501 MN101C49GTG (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) LSW910 to LSW922
(SEEK/AMS + > M, SEEK/AMS – . m, MBP, D-BASS D, DSPL, MTL BTM,
ATA6, BL SKIP 5, SHUF 4, REP3, 2 DISC+, 1 DISC– keys input)
(SEEK/AMS + > M, SEEK/AMS – . m, MBP, D-BASS D, DSPL, MTL BTM,
ATA6, BL SKIP 5, SHUF 4, REP3, 2 DISC+, 1 DISC– keys input)
5
KEYIN0
I
Key input terminal (A/D input) S907, LSW900 to LSW906, LSW908 (ATT, Z, OFF, SRC
COURCE, + (VOLUME), – (VOLUME), MODE o, SEL, SENS keys input)
COURCE, + (VOLUME), – (VOLUME), MODE o, SEL, SENS keys input)
6
RCIN0
I
Rotary remote commander key input terminal (A/D input)
7
NIL
I
Not used (fixed at “L”)
8
NIL
I
Not used (fixed at “L”)
9
DSTSEL
I
Destination setting terminal (A/D input)
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
XI
I
Sub system clock input terminal (32.768 kHz)
16
XO
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 (IC901)
21 to 23
—
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
BU-IN
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 remote control signal input terminal Not used (open)
30, 31
NIL
I
Not used (fixed at “L”)
32
—
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
FM_ON
O
FM power supply on/off control signal output “H”: FM power on
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)
Pin No.
Pin Name
I/O
Description
44
BUSCKO
O
Serial data transfer clock signal output to the SONY bus interface (IC581)
45
VOLSO
O
Serial data output to the electrical volume (IC330)
46
VOLCE
O
Chip enable signal output to the electrical volume (IC330) “H” active
47
VOLCKO
O
Bus clock signal output to the electrical volume (IC330)
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 CXA2509AQ (IC301)
“L”: auto music sensor on
“L”: auto music sensor on
53
F/ROUT
O
Forward/reverse control signal output to the CXA2509AQ (IC301)
“L”: reverse direction, “H”: forward direction
“L”: reverse direction, “H”: forward direction
54
MTLON
O
METAL on/off control signal output to the CXA2509AQ (IC301) “H”: METAL on
55
TAPATT
O
Tape muting on/off control signal output to the CXA2509AQ (IC301) “H”: muting on
Active at ATA, FF/REW mode
Active at ATA, FF/REW mode
56
NCO
O
Not used (open)
57
AMSIN
I
Whether a music is present or not from CXA2509AQ (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
NCO
O
Not used (open)
59
VOLATT
O
Pre amplifier muting on/off control signal output terminal Not used (open)
60 to 64
—
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
ST-IND
I/O
FM stereo broadcasting detection signal input from the FM/AM tuner unit (TU1), or forced
monaural control signal output to the FM/AM tuner unit (TU1)
“L” is input in the FM stereo mode, or “L” is output in the forced monaural mode
monaural control signal output to the FM/AM tuner unit (TU1)
“L” is input in the FM stereo mode, or “L” is output in the forced monaural mode
69
SD
I
Station detector detection signal input from the FM/AM tuner unit (TU1)
Stop level for SEEK, BTM, etc. is determined SD is present at input of “H”
Stop level for SEEK, BTM, etc. is determined SD is present at input of “H”
70
PLLSI
I
PLL serial data input from the FM/AM PLL (IC1)
71
PLLSO
O
PLL serial data output to the FM/AM PLL (IC1)
72
PLLCKO
O
PLL serial data transfer clock signal output to the FM/AM PLL (IC1)
73
PLLCE
O
PLL chip enable signal output to the FM/AM PLL (IC1) “H” active
74, 75
—
O
Not used (open)
76
COLSEL
I
Setting terminal for the illumination color
“L”: amber, “H”: green Fixed at “H” in this set
“L”: amber, “H”: green Fixed at “H” in this set
77 to 81
—
O
Not used (open)
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
(IC901) “H”: power on
(IC901) “H”: power on
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
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”: FF and FWD mode, “H”: others mode
POS2: “L”: REW mode, “H”: others mode
POS0: “L”: EJECT mode, “H”: others mode
POS1: “L”: FF and FWD mode, “H”: others mode
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