Sony XR-L240 Service Manual ▷ View online
25
XR-L240
5-7.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC1 MN101C49KTL (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
VREF –
—
Reference voltage (0V) terminal (for A/D converter)
2
VSM
I
FM and AM signal meter voltage detection input from the FM/AM tuner unit (A/D input)
3 to 6
NC
—
Not used
7
NOISE-DET
I
Noise level detection signal input at SEEK mode (A/D input)
8
MPTH
I
Multi-path detection signal input from the RDS decoder
9
NC
—
Not used
10
VREF +
—
Reference voltage (+5V) terminal (for A/D converter)
11
VDD
—
Power supply terminal (+5V)
12
OSC2
O
Main system clock output terminal (18.432MHz)
13
OSC1
I
Main system clock input terminal (18.432MHz)
14
VSS
—
Ground terminal
15
XI
I
Sub system clock input terminal (32.768kHz)
16
XO
O
Sub system clock output terminal (32.768kHz)
17
GND (MMOD)
—
Setting terminal for the single chip mode “L”: single chip
18
LCD-SO (TX)
O
LCD serial data output to the liquid crystal display driver
19
LCD-SI (RX)
I
LCD serial data input from the liquid crystal display driver
20
LCD-CKO
O
LCD serial transfer clock signal output to the liquid crystal display driver
21
TU-SDA
O
Serial data output to the FM/AM tuner unit
22
TU-SI
I
Serial data input from the FM/AM tuner unit
23
TU-SCL
O
Serial data transfer clock signal output to the FM/AM tuner unit
24
LCD-RES
O
LCD reset signal output to the liquid crystal display driver “L”: reset
25
LCD-CE
O
Chip enable signal output to the liquid crystal display driver “H” active
26
KEYACK
I
Key acknowledge signal detect input from the liquid crystal display driver
27
DAVN-RDS
I
RDS data request signal input from the RDS decoder “H” active
28
B/U-IN
I
Battery detect signal input from the battery detect circuit “L” is input at low voltage
29
NC
—
Not used
30
RAM BU
I
Internal RAM reset detection signal input terminal
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset “L”: RAM reset
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset “L”: RAM reset
31
TEST-IN
I
Setting terminal for the test mode “L”: test mode Normally: fixed at “H”
32
NCI
I
Not used
33
RESET
I
System reset signal input from the reset signal generator or reset switch “L”: reset
“L” is input for several 100 msec after power on, then it changes to “H”
“L” is input for several 100 msec after power on, then it changes to “H”
34
TU-ENABLE
O
Chip enable signal output to the FM/AM tuner unit “H” active
35
BEEP
O
Beep sound drive signal output to the power amp
36
POWER-ON
O
Main system power supply on/off control signal output terminal “H”: power on
37
ILL-IN
I
Not used
38
ACC-IN
I
Accessory detect signal input terminal “L”: accessory on
39
NC
—
Not used (open)
40
TEL-MUTE
I
Telephone muting signal input terminal At input of “H”, the signal is attenuated by –20 dB
Not used
Not used
41
NCI
I
Not used
42
UNI-SO
O
Serial data output to the bus interface Not used
43
UNI-SI
I
Serial data input from the bus interface Not used
44
UNI-CKO
O
Serial data transfer clock signal output to the bus interface Not used
45
SDA
I/O
Two-way data bus with the RDS decoder
26
XR-L240
Pin No.
Pin Name
I/O
Description
46
NC
—
Not used
47
SCL
O
Bus clock signal output to the RDS decoder
48
VOL-SO
O
Serial data output to the electrical volume
49
VOL-CE
O
Chip enable signal output to the electrical volume “H” active
50
VOL-CKO
O
Serial data transfer clock signal output to the electrical volume
51
AMP-ON
O
Standby on/off control signal output to the power amp “L”: standby mode, “H”: amp on
52
AMP-MUTE
O
Muting on/off control signal output to the power amp “L”: muting on
53
MUTE
O
Audio line muting on/off control signal output terminal “H”: muting on
54
TU-MUTE
O
Muting on/off control signal output of the FM and AM tuner signal “H”: muting on
55
PORT2 (ST)
I
FM stereo broadcasting detection signal input from the FM/AM tuner unit
“H”: stereo display lighting
“H”: stereo display lighting
56
NC
—
Not used
57
LO/DX
O
Local/DX control signal output to the FM/AM tuner unit “L”: DX
58
TU-ON
O
Tuner system power supply on/off control signal output terminal “H”: tuner power on
59
FM-ON
O
FM system power supply on/off control signal output terminal
“L”: AM power on, “H”: FM power on Not used
“L”: AM power on, “H”: FM power on Not used
60
AM-ON
O
AM system power supply on/off control signal output terminal
“L”: FM power on, “H”: AM power on Not used
“L”: FM power on, “H”: AM power on Not used
61 to 68
NC
—
Not used
69
NOISE-ON
O
Discharge control signal output for the noise detection circuit “H”: discharge
70 to 82
NC
—
Not used
83
ILL-COLOR
I
Illumination color select input terminal “L”: amber illumination “H”: green illumination
(fixed at “L”)
(fixed at “L”)
84
DEST-SEL0
I
Destination setting terminal (fixed at “H”)
85
DEST-SEL1
I
Destination setting terminal (fixed at “L”)
86
DEST-SEL2
I
Destination setting terminal (fixed at “H”)
87, 88
NC
—
Not used
89
NOSE-SW
I
Front panel block remove/attach detection signal input terminal
“L”: front panel is attached
“L”: front panel is attached
90
FLASH-W
I
Internal flash memory data write mode detection signal input terminal
“L”: data write mode Normally: fixed at “H”
“L”: data write mode Normally: fixed at “H”
91
NC
—
Not used
92
ILL-ON
O
Power on/off control signal output of the illumination LED and LCD back light
“H”: power on
“H”: power on
93
BU-SON
O
Bus on/off control signal output to the bus interface “L”: bus on Not used
94
SYS-RST
O
Reset signal output to the bus interface “L”: reset Not used
95
DAVSS
—
Ground terminal (for D/A converter)
96
TAPE-ON
O
Capstan/reel motor drive signal output terminal “H”: motor on
97
N/R
I
Tape direction switch input terminal “L”: reverse direction “H”: forward direction
98
FF/REW
I
FF/REW detection switch input terminal “L”: FF/REW mode
99
TAPE-IN
I
Tape in detection switch input terminal “L”: tape in
100
DAVDD
—
Power supply terminal (+5V) (for D/A converter)
27
XR-L240
6-1. GENERAL SECTION
SECTION 6
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.
• Hardware (# mark) list and Accessories are
given in the last of the electrical 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
F901
#2
#2
#2
#3
#3
TU100
Front panel section
1
16
2
3
4
5
6
7
8
9
10
11
12
13
14
15
MG-36SZ12-32
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
1
3-224-905-01 PANEL, SUB
2
X-3370-437-2 LOCK ASSY
3
3-041-581-01 DOOR, CASSETTE
4
3-044-125-01 SPRING, TORSION
5
3-376-464-11 SCREW (+PTT 2.6X6), GROUND POINT
6
1-757-662-11 CORD (WITH CONNECTOR) (ISO) (POWER)
* 7
X-3378-167-1 COVER ASSY, TOP
8
A-3340-270-A MAIN BOARD, COMPLETE
9
3-224-921-21 HEAT SINK
* 10
3-041-578-01 BRACKET (IC)
11
3-937-650-01 PLATE (C), GROUND
12
3-046-339-01 CUSHION (U)
13
3-232-738-01 INSULATED PLATE
* 14
3-256-389-01 CHASSIS
15
3-041-599-01 COLLAR
16
3-042-244-01 SCREW (T)
F901
1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) (10A)
TU100
1-693-523-11 FM/AM TUNER UNIT
Ver 1.3
28
XR-L240
6-2. FRONT PANEL SECTION
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
51
3-224-914-01 BUTTON (4-6) (4. 5. 6. TA. PTY. DSPL)
52
3-224-906-01 BUTTON (1-3) (ATT. SENS. AF. 1. 2. 3)
53
3-224-913-11 BUTTON (RELEASE)
54
3-220-522-01 SPRING (RELEASE)
55
3-236-751-01 PANEL, FRONT
56
3-236-753-01 BUTTON (+/-)
57
3-224-908-11 BUTTON (T. MODE. SEL)
58
3-224-917-11 BUTTON (EJECT) (Z)
59
3-029-327-01 SPRING (EJECT)
60
3-224-916-11 BUTTON (REW) (m)
61
3-375-372-01 SPRING (F/R)
62
3-224-915-11 BUTTON (FF) (M)
63
3-224-907-01 BUTTON (D-BASS) (POS. D-BASS. OFF)
64
3-236-752-01 BUTTON (SEEK) (+ SEEK MANU -)
* 65
3-224-927-01 PLATE (LCD), GROUND
66
1-694-696-31 CONDUCTIVE BOARD, CONNECTION
* 67
3-224-926-11 ILLUMINATOR
* 68
3-236-754-01 PLATE, LIGHT GUIDE
* 69
3-224-924-01 HOLDER (LCD)
70
1-786-304-11 SWITCH, SHEET
71
3-224-904-01 PANEL, FRONT BACK
* 72
A-3315-467-A PANEL ASSY, FRONT
73
X-3378-490-2 CASE (PANEL) ASSY
LCD900 1-804-512-11 DISPLAY PANEL, LIQUID CRYSTAL (AMBER)
LCD900 1-804-632-11 DISPLAY PANEL, LIQUID CRYSTAL (GREEN)
LCD900 1-804-632-11 DISPLAY PANEL, LIQUID CRYSTAL (GREEN)
51
52
53
54
55
56
57
58
59
61
61
60
65
66
62
64
63
67
68
69
70
71
not supplied
(CONTROL board)
(CONTROL board)
LCD900
#4
#4
73
72
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