Sony MDS-JB940 Service Manual ▷ View online
57
AU BOARD
IC1 M30805SGP
(SYSTEM CONTROL)
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
I/O
O
O
I
I
O
O
O
O
O
O
O
O
O
O
I
I
—
—
I
O
I
I
I
I
I
I
I
I
O
I
O
I
O
I
O
I/O
I/O
O
I
I
I
O
I
O
I
O
O
I
I
O
I
Description
Display tube, serial data (TxD4) for display by microprocessor
Display tube, serial clock (CLC4) for display by microprocessor
Control A1 input
Remote control data input
Not used
Not used
Not used
LINE mute output
AD/DA reset output
AD/DA latch output
Loading motor voltage control output
Loading control output
Loading control output
RF signal superimpose ON/OFF
Data bus selection. Fixed to Low (16-bit width)
Processor mode selection. Fixed to Vcc
Sub clock output (32.768KHz)
Sub clock output (32.768KHz)
System reset
Main clock output (10 MHz)
Power supply ground
Main clock input (10 MHz)
3.3 V power supply
(Fixed to High)
Digital-in sync (DSP)*REC system
Power down detection (Low: Power Down)
SUBQ (pit)/ADIP (MO) SYNC*PLAY system
Keyboard clock input
Laser ON/OFF
Innermost circumference detection by sled
Control A1 output
XINT (DSP)
Not used
XELT (DSP)
Write power ON/OFF
I2 communication clock (open-drain)
I2 communication clock (open-drain)
DSP (AD/DA) serial output
3.3 V power supply
DSP serial input
Power supply ground
DSP/(AD/DA) serial clock
Loading position detection
CLIP serial output
CLIP serial input
CLIP serial clock
Digital board reset (MDM)
SENS terminal
Loading position detection
DSP latch
Loading position detection
Pin Name
FL-DATA
FL-CLK
A1-IN
RMC
NC
FL-REQ
FL-BUSY
MUTE
RESET(AD/DA)
LATCH(AD/DA)
LD-LOW
LD-IN
LD-OUT
MOD
BYTE
CNVSS
X-CIN
X-COUT
RESET
X-OUT
VSS
XIN
VCC
NMI
DQSY
P-DOWN
SQSY
KEYBD-CLK
LDON
LIMIT-IN
A1-OUT
XINT
BUSY
XELT
WRPWR
I2CCLK
I2CDAT
SWDT
VCC
SRDT
VSS
SCLK
REC-SW
TX0(CLIP)
RX0(CLIP)
CLK(CLIP)
DIG-RST
SENS
PLAY-SW
XLATCH
OUT-SW
58
Pin No.
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77 to 85
86 to 89
90
91
92
93
94 to 101
102 to 113
114
115
116
117
118
119 to 122
123
124
125
126
127
128
129
130
131
132
133
134
135
I/O
I
O
I
O
I
I
I
I
O
I/O
O
O
O
O
O
I
I
O
O
O
O
O
I
O
I
O
I
O
I
O
I
O
I/O
O
O
I
I
I
I/O
I
I
O
O
O
O
O
I
O
I
I
I
I
Description
Not used (fixed to High)
Microprocessor mode
Not used (fixed to High)
Microprocessor mode
(DSP)
Power supply ground
(DSP)
3.3 V power supply
EEP-ROM write protect
EEP data
Not used
Read signal output
Not used
Write signal output
EEP CLK
Disc reflection index detection switch
Protect switch
Chip select (Flash ROM)
Not used
Not used
Address bus
Address bus
3.3 V power supply
Address bus
Power supply ground
Address bus
Model identification
Flash ROM write-protect
3.3 V power supply
Address bus
Power supply ground
Address bus
Data bus
Keyboard clock ON/OFF
Not used
Keyboard data
REC VOL (B)
REC VOL (A)
Data bus
JOG (0)
JOG (1)
DA latch
OPT1/OPT2 selection
OPT1/OPT2 selection
Chip select for display
Not used
Power supply ground
DSP driver power control output
3.3 V power supply
OP voltage (current) detection
Not used
Not used
Pin Name
RDY
ALE
HOLD
HLDA
MNT2(XBUSY)
VSS
MNT1(SHCK)
VCC
EEP-WP
SDA(EEP)
BCLK
OE
BHE
WE
SCL(EEP)
REFRECT-SW
PROTECT-SW
CS0(FLASH)
CS1(SRAM)
CS2 (Dictionary ROM)
A20
A19
VCC
A18
VSS
A17 to 9
SEL3 to 0
WP(FLASH)
VCC
A8
VSS
A7 to A0
D15 to D4
KEYBD-CLK-CTRL
I2CBUSY
KEYBD-DAT
REC-VOL-B
REC-VOL-A
D3 to D0
JOG-0
JOG-1
LATCH(DA)
OPT1/OPT2
COAX/OPT
FL-CS
POWER(IIC)
VSS
STB
VCC
OP-LEVEL
NC
NC
59
Pin No.
136
137 to 139
140
141
142
143
144
I/O
I
I
I
I
I
I
O
Description
Timer mode selection (slide switch)
Key input
Power supply ground
Key input
3.3 V power supply
3.3 V power supply
Not used
Pin Name
TIMER
KEY3 to 1
AVSS
KEY0
VREF
AVCC
FL-DATA(IN)
NOTE:
•
-XX, -X mean standardized parts, so they may
have some differences from the original one.
have some differences from the original one.
•
Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.
•
The mechanical parts with no reference number
in the exploded views are not supplied.
in the exploded views are not supplied.
•
Hardware (# mark) list and accessories and
packing materials are given in the last of this
parts list.
packing materials are given in the last of this
parts list.
•
Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
Example:
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts of Color Cabinet’s Color
•
Abbreviation
CND: Canadian model
CND: Canadian model
SECTION 7
EXPLODED VIEWS
60
The components identified by mark
0
or
dotted line with mark
0
are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
0
sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant
le numéro spécifié.
le numéro spécifié.
not
supplied
supplied
not supplied
AEP
UK
US. Canadian
Front panel section
T701
not supplied
not supplied
#1
#1
#1
#1
#1
#2
#2
#1
A
A
6
6
6
7
16
5
4
17
19
16
1
16
16
16
19
16
16
13
15
16
8
20
20
6
9
10
11
14
18
18
18
MDM-7A
not supplied
8
12
not supplied
7-1. CHASSIS SECTION
Ref. No.
Part No.
Description
Remarks
Ref. No.
Part No.
Description
Remarks
1
1-792-926-11 WIRE (FLAT TYPE) (19 CORE)
4
A-4725-113-A AC BOARD,COMPLETE (AEP, UK)
4
A-4725-120-A AC BOARD, COMPLETE (US, CND)
5
4-218-995-01 REINFORCEMENT (CASE) (UK)
6
4-227-843-01 SCREW (TP), FLAT HEAD (BLACK)
(US,CND,AEP)
6
4-227-843-11 SCREW (TP), FLAT HEAD (SILVER) (AEP)
6
4-227-843-21 SCREW (TP), FLAT HEAD (BLACK) (UK)
* 7
4-997-138-02 CASE (4095269) (BLACK)
7
4-997-138-62 CASE (409526) (SILVER)
8
4-228-643-01 SCREW (+BVTTWH M3), STEP
9
1-792-925-11 WIRE (FLAT TYPE) (23 CORE)
10
1-792-810-11 WIRE (FLAT TYPE) (27 CORE)
* 11
4-923-873-01 BRACKET, CORD STOPPER
12
3-703-244-00 BUSHING (2104), CORD
13
1-469-241-11 CORE, FERRITE (RFC-8BK) (US, CND)
14
4-228-507-01 PANEL, BACK (AEP, UK)
14
4-228-507-11 PANEL, BACK (CND)
14
4-228-507-21 PANEL, BACK (US)
15
A-4725-115-A AU BOARD, COMPLETE (AEP, UK)
15
A-4725-122-A AU BOARD, COMPLETE (US, CND)
16
4-951-620-01 SCREW (2.6X8), +BVTP
17
3-703-249-01 SCREW, S TIGHT, +PTTWH 3X6
0 18
1-558-568-21 CORD, POWER (AEP)
0 18
1-696-586-11 CORD, POWER (UK)
0 18
1-790-154-31 CORD, POWER (US, CND)
19
X-4949-523-1 FOOT ASSY (F50180S)
20
4-228-689-01 INSULATOR
0 T701
1-435-581-11 TRANSFORMER, POWER (AEP, UK)
0 T701
1-435-582-11 TRANSFORMER, POWER (US, CND)
Ver. 1.3
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