Sony MEX-BT2900 / MEX-BT2950 Service Manual ▷ View online
MEX-BT2900/BT2950
29
1
2
3
4
5
6
5
6
7
8
9
10
14
13
12
11
12
11
BUS ON
SWITCH
RESET
SWITCH
BATTERY
SWITCH
BUS_ON
RST
BATT
CLK
VREF
GND
VCC
RST
BUS_IN
CLK_IN
BU_CHECK
BUS_IN
CLK_IN
BU_CHECK
DATA_IN
DATA_OUT
DATA_I/O
IC402, 1002 TK11133CSCL-G
IC801 BA8271F-E2
CONTROL
CIRCUIT
BANDGAP
REFERENCE
+
–
OVER HEAT &
OVER CURRENT
PROTECTION
1
VCONT
3
NP
2
GND
4
VOUT
5
VIN
– KEY Board –
IC901 LC75829PWH-US-H
48 S48
47 S47
46 S46
45 S45
44 S44
43 S43
42 S42
41 S41
40 S40
39 S39
47 S47
46 S46
45 S45
44 S44
43 S43
42 S42
41 S41
40 S40
39 S39
19
S19
20
S20
17
S17
18
S18
21
S21
22
S22
23
S23
24
S24
25
S25
26
S26
27
S27
28
S28
3
P3/S3
4
P4/S4
1
BACKLIGHT
2
DIMMER
5
S5
6
S6
7
S7
8
S8
9
S9
10
S10
11
S11
12
S12
52
COM3
51
S51/COM4
59
VSS
58
VDD2
57
VDD1
56
VDD
64
DI
63
CL
62
CE
60
S53/OSCI
55
S52
61
INH
COMMON
DRIVER
CLOCK
GENERATOR
CCB INTERFACE
SHIFT REGISTER
CONTROL
REGISTER
SEGMENT DRIVER & LATCH
13
S13
14
S14
15
S15
16
S16
29
S29
30
S30
31
S31
32
S32
38 S38
37 S37
36 S36
35 S35
34 S34
33 S33
37 S37
36 S36
35 S35
34 S34
33 S33
50
S50
49
S49
54
COM1
53
COM2
MEX-BT2900/BT2950
30
• IC Pin Function Description
MAIN BOARD IC401 R5F3650MBDZ99FA (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Description
1
LCD_SO
O
Serial data output to the LCD driver
2
LCD_CLK
O
Serial clock signal output to the LCD driver
3
NOSE_SW
I
Front panel remove/attach detection signal input terminal Fixed at “L” in this set
4
SIRCS
I
Remote control signal input from the remote control signal receiver
5
UNISO
O
SONY bus data output to bus interface (BT2900: US and Canadian models only)
6
UNISI
I
SONY bus data input from the bus interface (BT2900: US and Canadian models only)
7
UNISCK
O
SONY bus clock signal output to the bus interface (BT2900: US and Canadian models only)
8
BYTE
I
External data bus width select signal input Connect to VSS in this set
9
CNVSS
I
Flash write signal input terminal Normally operation: “L”, Flash write: “H”
10
XIN
I
Low speed operation clock signal input terminal (32.768 kHz)
11
XOUT
O
Low speed operation clock signal output terminal (32.768 kHz)
12
RESET
I
System reset signal input from the reset signal generator and reset switch “L”: reset
13
OSCOUT
O
High speed operation clock signal output terminal (7.92 MHz)
14
VSS
―
Ground terminal
15
OSCIN
I
High speed operation clock signal input terminal (7.92 MHz)
16
VCC1
―
Power supply terminal (+3.3V)
17
NMI
I
Non-maskable interrupt signal input terminal Fixed at “H” in this set
18
RC_IN1
I
Rotary remote commander shift key input terminal
19
BUIN
I
Back up power supply detection signal input terminal “L” is input at low voltage
20
SYSRST
O
Reset signal output terminal
21
BUS_ON
O
SONY bus on/off control signal output to the bus interface
(BT2900: US and Canadian models only)
(BT2900: US and Canadian models only)
22
DEC_SI
I
Serial data input from the CD section
23
DEC_SCK
O
Serial clock signal output to the CD section
24
DEC_SO
O
Serial data output to the CD section
25 to 27
NCO
O
Not used
28
BEEP
O
Beep sound drive signal output to the power amplifi er
29
I2C_SCK
O
IIC serial clock signal output terminal
30
I2C_SIO
I/O
IIC two-way serial data bus terminal
31
FW_TXD
O
Flash writer data output terminal
32
FW_RXD
I
Flash writer data input terminal
33
FW_CLK
I
Flash writer clock signal output terminal
34
FW_BUSY
O
Flash writer busy signal output terminal
35
BT_API_TX
O
Not used
36
BT_API_RX
O
Not used
37
DRV_ON
O
Driver control signal output to the CD section
38
MEC_LOAD
O
Motor (Loading) signal output to the CD section
39
MEC_EJECT
O
Motor (Eject) signal output to the CD section
40
CDON_1500MV
O
CD servo power supply control signal output to the CD section
41
EPM
O
EPM signal output terminal Fixed at “L” in this set
42
MEC_INSW
I
Detection signal input from the CD section (in switch)
43
MEC_LIMIT
I
Detection signal input from the CD section (limit switch)
44
MEC_DSW
I
Detection signal input from the CD section (D switch)
45
DEC_INT
I
Request signal input from the CD section
46
CE
O
Chip enable signal output terminal Fixed at “H” in this set
47, 48
NCO
O
Not used
49
DEC_XMUTE
O
Muting on/off control signal output to the CD section “L”: muting on
50
NCO
O
Not used
51
CD_ZDET
I
Zero detection signal input from the CD section
52
CD_XCCE
O
Chip enable signal output to the CD section
53
DEC_SSTBY
O
SRAM standby mode control signal output to the CD section
54
DEC_RST
O
Reset signal output to the CD section
55
BT_ATT_XEN
O
Not used
56
TELATT
I
Telephone attenuator detection signal input terminal
57
ACC_IN
I
Accessory power detection signal input terminal “L”: accessory power on
58
ATT
O
Muting on/off control signal output terminal “H”: muting on
59
DIAG
I
Diagnostic signal input from the power amplifi er
MEX-BT2900/BT2950
31
Pin No.
Pin Name
I/O
Description
60
AMPSTB
O
Standby control signal output to the power amplifi er
61
CYRIL_SEL
I
Cyrillic letter response setting terminal Not used
62
VCC2
―
Power supply terminal (+3.3V)
63
NCO
O
Not used
64
VSS
―
Ground terminal
65
ILLUMI SEL
I
Key illumination voltage setting signal input
66
COLSW SEL
I
Key illumination color change function signal input Not used
67
BT_MUTE
I
Muting on/off control signal to the BT section “H”: muting on
68
B-OUT SEL
I
Blackout setting terminal “H”: blackout effective (BT2950 only), Other models is “L”
69
NCO
O
Not used
70 to 72
AREASEL2 to
AREASEL 0
I
Destination setting terminal
73
DIM SEL
I
Dimmer function selection setting signal input terminal Fixed at “L” in this set
74
NCO
O
Not used
75
MEC_SELFSW
I
Detection signal input from the CD section (self switch)
76
EQ TYPE SEL
I
Not used
77
BT_TX
O
Serial data output to the Bluetooth section
78
BT_RX
I
Serial data input from the Bluetooth section
79, 80
DEBUG_1, DEBUG_2
O
Not used
81, 82
RE-IN1, RE-IN0
I
Jog dial pulse input from the rotary encoder
83
SAIN
O
Not used
84
BT_RTS
O
RTS control signal output to the Bluetooth section
85
BT_CTS
I
CTS control signal input from the Bluetooth section
86
BT_RESET
O
Reset signal output to the Bluetooth section “L”: reset
87
BT_POWER
O
Power on/off control signal output to the Bluetooth section
88
NCO
O
Not used
89
SADATA
O
Spectrum analyzer serial data output to the electronic volume
90
SACLK
O
Spectrum analyzer serial clock signal output to the electronic volume
91
KEYACK0
I
Acknowledge signal (wake up signal) input terminal for the rotary remote commander
92
KEYACK1
I
Acknowledge signal (wake up signal) input terminal for the front panel key
93
VSM
O
Not used
94, 95
KEYIN1, KEYIN0
I
Front panel key input terminal
96
AVSS
―
Ground terminal (for A/D converter)
97
RC_IN0
I
Rotary remote commander shift key input terminal
98
AVRH
I
Reference voltage (+3.3V) input terminal (for A/D converter)
99
AVDD
―
Power supply terminal (+3.3V) (for A/D converter)
100
LCD_CE
O
Chip enable signal output to the LCD driver
32
MEX-BT2900/BT2950
SECTION 6
EXPLODED VIEWS
1
X-2547-884-2 PANEL ASSY, SUB
2
3-042-244-11 SCREW (T)
3
X-2547-583-1 LOCK ASSY (T)
4
2-898-980-01 HOLDER (MIC SLOT)
5
3-042-244-01 SCREW (T)
6
1-838-694-11 LEAD WIRE WITH CONNECTOR
7
2-050-124-02 SCREW +BTT 2.6X5.2
8
A-1793-203-A MAIN BOARD, COMPLETE (Including BT board)
(BT2900: AEP, UK)
8
A-1793-204-A MAIN BOARD, COMPLETE (Including BT board)
(BT2900: US, CND)
8
A-1793-205-A MAIN BOARD, COMPLETE (Including BT board)
(BT2950)
9
A-1794-646-A BT BOARD, COMPLETE (Included in MAIN board)
10
1-831-838-11 CORD (WITH CONNECTOR) (ISO) (POWER)
(BT2900: AEP, UK)
10
1-837-531-21 CONNECTION CORD FOR AUTOMOBILE
(POWER) (BT2900: US, CND/BT2950)
11
X-2580-124-1 PLATE (MIC SLOT) (SV) ASSY
12
3-250-543-21 SCREW (+B P-TITE M2)
FU601
1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) (10A/32V)
MIC201 1-542-689-11 MICROPHONE
#1
#1
7-685-792-09 SCREW +PTT 2.6X6 (S)
#2
7-685-790-01 SCREW +PTT 2.6X4 (S)
#3
7-685-793-09 SCREW +PTT 2.6X8 (S)
#4
7-685-794-09 SCREW +PTT 2.6X10 (S)
#5
7-685-134-19 SCREW +P 2.6X8 TYPE2 NON-SLIT
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
Note:
• -XX and -X mean standardized parts, so
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
original one.
• Items marked “*” are not stocked since
they are seldom required for routine ser-
vice. Some delay should be anticipated
when ordering these items.
vice. Some delay should be anticipated
when ordering these items.
• The mechanical parts with no reference
number in the exploded views are not sup-
plied.
plied.
• Color Indication of Appearance Parts Ex-
ample:
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts Color Cabinet’s Color
• Abbreviation
CND : Canadian model
CND : Canadian model
6-1. MAIN SECTION
The components identifi ed by mark 0
or dotted line with mark 0 are critical for
safety.
Replace only with part number specifi ed.
or dotted line with mark 0 are critical for
safety.
Replace only with part number specifi ed.
Les composants identifi és par une marque
0 sont critiques pour la sécurité.
Ne les remplacer que par une pièce por-
tant le numéro spécifi é.
0 sont critiques pour la sécurité.
Ne les remplacer que par une pièce por-
tant le numéro spécifi é.
not supplied
not supplied
CD mechanism deck section
(MG-101X-188//Q)
front panel section
not supplied
MAIN board
1
#1
#1
#1
#1
#2
#3
#3
#4
#4
#4
#5
#5
#5
FU601
not supplied
not supplied
not supplied
MIC201
2
3
11
5
4
6
7
7
7
8
9
10
12
not supplied
(ANTENNA board)
A
B
B
C
C
A
(BT2900: US, CND)
Note: When the BT board or MAIN board (includ-
ing BT board) is replaced, it is necessary to
confi rm operation. Refer to “BLUETOOTH
FUNCTION CHECKING METHOD US-
ING A CELLULAR PHONE” of the servic-
ing note (See page 6).
confi rm operation. Refer to “BLUETOOTH
FUNCTION CHECKING METHOD US-
ING A CELLULAR PHONE” of the servic-
ing note (See page 6).
Click on the first or last page to see other MEX-BT2900 / MEX-BT2950 service manuals if exist.