Sony CDC-R937 / CDC-X937 Service Manual ▷ View online
17
CDC-R937/X937
Pin No.
Pin Name
I/O
Pin Description
60
RFZI
I
RFRP zero-closs signal input
61
RFRP
I
RFRP ripple signal input
62
FEI
I
Focus error signal input
63
SBAD
I
Sub beam addition signal input
64
TEI
I
Tracking error signal input
65
TEZI
I
Tracking error zero-closs signal input
66
FOO
O
Focus equalizer signal output
67
TRO
O
Tracking equalizer signal output
68
VREF
—
Analog reference power supply pin
69
RFGC
O
RF amplitude adjustment control signal output
70
TEBC
O
Tracking balance control signal output
71
FMO
O
Focus equalizer signal output
72
DMO
O
Disc equalizer signal output
73
2VREF
—
Analog reference power supply pin
74
SEL
O
APC circuit on/off signal output
75
VDD2
—
Power supply pin (+5 V)
76, 77
VSS2, XVSS
—
Ground pin
78
XI
I
Crystal oscillator input for CD
79
XO
O
Crystal oscillator output for CD
80
XVDD
—
Power supply pin (+5 V)
81
DVSR
—
Ground pin
82
RO
O
R channel data clock wise signal output
83
DVRR
—
R channel reference voltage pin
84
DVDD
—
Power supply pin
85
DVRL
—
L channel reference voltage pin
86
LO
O
L channel data clock wise signal output
87
DVSL
—
Ground pin
88
TESTM
I
Ground pin
89
IN2/(VPP)
I
Ground pin
90
RESET
I
System reset signal input
91
/HOLD
I
Hold mode control signal input
92
CS
I
External interruption signal input
93
MXO
O
Not used. (Open)
94
MXI
I
Ground pin
95
MVSS2
—
Ground pin
96
MVDD2
—
Power supply pin (+5 V)
97 – 100
COM1 – 4 (OT1 – 4)
O
Not used. (Open)
18
CDC-R937/X937
• IC901 µPD178078GF-588-3BA (SYSTEM CONTROL) (MAIN BOARD) (CDC-R937)
• IC901 µPD178076GF-571-3BA (SYSTEM CONTROL) (MAIN BOARD) (CDC-X937)
• IC901 µPD178076GF-571-3BA (SYSTEM CONTROL) (MAIN BOARD) (CDC-X937)
Pin No.
Pin Name
I/O
Pin Description
1
BATT IN
I
Battery signal input
2
DFP IN
I
Front panel with/without detect signal input
3
LCD DI
I
LCD serial data signal input
4
LCD DO
O
LCD serial data signal output
5
LCD CLO
O
LCD sync clock signal output
6
LCD CE
O
LCD driver CE signal output
7
BBE SW1
O
BBE on/off select signal output
8
CDS DI
I
CDS serial data signal input
9
CDS DO
O
CDS serial data signal output
10
CDS CLO
O
CDS sync clock signal output
11 – 15
NC
O
Not used. (Open)
16
BBE SW2
O
BBE effectiveness select signal output
17
NC
O
Not used. (Open)
18
EVOL CLO
O
Clock signal output to electronic volume
19
EVOL DO
O
Serial data signal output to electronic volume
20
EVOL CE
O
CE signal output to electronic volume
21
LOC/DX
O
LOC/DX select signal output
22
DSSA CONT
O
DSSA control signal output “H”: DSSA L/R
23
ACC DET
I
Power supply overvoltage detect signal input
24
PH MUTE
I
External mute control signal input
25
LEV.IND.
I
Level signal input
26
TEST
—
CDS test mode pin
27
AVDD
—
Power supply pin (+5 V)
28 – 30
KEY1 – KEY3
I
A/D key signal input
31
FM/AM S M
I
CDC-R937: RDS AF signal input CDC-X937: FM/AM S meter signal input
32
AVSS
—
Ground pin
33
REG CPU
—
Regulator for CPU power supply
34
VDD
—
Power supply pin (+5 V)
35
REG OSC
—
Regulator for oscillator circuit
36
X OUT
O
System clock oscillator output (6.3 MHz)
37
X IN
I
System clock oscillator input (6.3 MHz)
38
GND0
—
Ground pin
39
IF REQ
O
IF count signal request output
40
GND2
—
Ground pin
41
AM IF
I
AM IF count signal input
42
FM IF
I
FM IF count signal input
43
VDD PLL
—
Power supply pin for PLL (+5 V)
44
FM OSC
I
FM local oscillator signal input
45
AM OSC
I
AM local oscillator signal input
46
GND PLL
—
Ground pin for PLL
47
EO 0
O
Error out signal output from charge pomp
48
EO 1
O
Error out signal output from charge pomp
49
IC
—
Not used. (Connect to ground.)
50
RESET
I
System reset signal input
51
RDS CL IN
I
CDC-R937: RDS clock signal input CDC-X937: Not used. (Open)
52
ACC IN
I
ACC on/off detect signal input
53
RMT IN
I
Remote control signal input
54
ST IN/SD IN
I
FM receive stereo signal input
55
ST
O
CDC-X937: FM receive forced monaural change over signal output
CDC-R937: Not used. (Open)
56
ST BY MUTE
O
ST-BY mute control signal output to power IC
19
19
CDC-R937/X937
4-2. CIRCUIT BOARDS LOCATION
Pin No.
Pin Name
I/O
Pin Description
57
POWER CONT
O
Power control signal output
58
RDS DI
I
CDC-R937: RDS serial data signal input CDC-X937: Not used. (Open)
59
BEEP
O
Beep signal output
60
MUTE
O
Audio mute control signal output
61
LED
O
LED on/off control signal output (for CD window LED)
62, 63
NC
O
Not used. (Open)
64
RDS MODE
O
RDS mode signal output “H”: RDS AF
65
POWER MUTE
O
Mute control signal output to power IC
66
FM BAND
O
Band (FM) select signal output
67
AM BAND
O
Band (AM) select signal output
68
NC
O
Not used. (Open)
69
ILLUM CONT 1
O
Panel illumination color change over signal output “H”: Blue, “L”: Red
70
ILLUM CONT 2
O
Panel illumination color change over signal output “H”: Red, “L”: Blue
71
MI-1
I
Diode matrix input for initial setting
72
MI-2
I
Diode matrix input for initial setting
73
MI-3
I
Diode matrix input for initial setting Not used. (Open)
74
MO-1
O
Diode matrix output for initial setting Not used. (Open)
75
MO-2
O
Diode matrix output for initial setting
76
MO-3
O
Diode matrix output for initial setting
77
MO-4
O
Diode matrix output for initial setting
78
AUX SW
I
AUX detection signal input
79
CDS SREQ
I
CDS S-REQ signal input
80
LAMP CONT
O
Lamp control signal output
81
TEST CD
O
Not used. (Open)
82
GND1
—
Ground pin
83
TEST MF
O
Not used. (Open)
84, 85
PANCON 1, 2
O
Panel open/close control signal output
86
SW1
I
Disc detection switch 1 signal input
87
SW2
I
Disc detection switch 2 signal input
88
SW3
I
Not used. (Open)
89
PANEL SW
I
M-FLAP DFP open/close control signal input
90
MF CONT
O
Power supply control signal output for panel operation
91
SEN 1
I
Position detection (photo sens) signal input for panel open/close
92
SEN 2
I
Position detection (lilit sw) signal input for panel open/close
93
LMT SW
O
Not used. (Open)
94
CDS RESET
O
CDS reset signal output
95
CDS SLEEP
O
CDS sleep signal output
96
CDS CS
O
CDS CS signal output
97
(CDS STOP)
O
Not used. (Open)
98
RADIO CONT
O
Radio control signal output
99
VDD PORT
—
Power supply pin (+5 V)
100
GND PORT
—
Ground pin
KEY board
LED board
INDICATOR board
SUB board
SENSOR board
SERVO board
MAIN board
AUX board
tuner unit
(TU101)
(TU101)
20
20
CDC-R937/X937
4-3. BLOCK DIAGRAM — CD SECTION —
(Page 21)
25
24
22
20
16
17
15
14
13
11
10
2
26
57
60
59
62
86
82
63
64
65
70
74
69
33
9
8
4
7
6
5
FOCUS
COIL
DRIVE
LD
DRIVE
Q221
TRACKING
COIL
DRIVE
SPINDLE
MOTOR
DRIVE
5V
REG.
8
9
20
M2
(SPINDLE)
M
M1
(SLED/LOADING)
M
-
+
+
-
FOCUS
COIL
TRACKING
COIL
VIN3
VIN3G
VIN4
VIN4G
VIN2
VIN2G
VIN1
REG IN
VIN1G
MUTE
VO3+
VO3-
VO4+
VO4-
VO2+
VO2-
VO1+
VO1-
REG
OUT
OUT
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE/LOADING MOTOR DRIVE,
IC201
6
7
4
5
13
15
25
16
14
19
+5V REG
Q201
24
23
17
18
S3
(CHUCH)
S2
(DISC IN2)
S1
(DISC IN1)
S4
(LIMIT)
CD+5V
VC
1
2
3
4
5
6
7
8
9
10
11
13
12
15
14
FPI
RFI
RFZI
RFZI
FEI
RFCT
61 RFRP
SBAD
TEI
TEI
TEZI
TEBC
TEBC
SEL
RFGC
RFGC
P2-O/EMPH
78 XI
79 XO
66 FOO
67 TRO
28 P3-3(ADIN3)
72 DMO
26 LM CONT
71 FMO
TPI
TNI
FNI
MDI
LDD
19 VRO
RFGO
LO
RO
RFRPIN
RFCT
RFRP
FEO
FEN
FEN
SBAD
TEO
TEN
TEN
TEB
SEL
SEL
RFGC
GVSW
VC
10
11
X241
16.9344MHz
DIGITAL SIGNAL SERVO PROCESSOR
IC241
RF AMP
IC221
23
P1-2(K2)
24
SW3
22
P1-1(K1)
CDS SRQ
SW1
CDS DMSCD
CDS DCDMS
CDS CLO
CDS CS
RESET
CD R
CD L
21
LIMIT SW
CD+5V
CD+8V
OPTICAL PICK-UP
BLOCK
MAIN
SECTION
A
SLED/
LOADING
MOTOR
DRIVE
SPEED
CONTROL
Q202
90
92
RESET
CS
32
31
CLOCK
SRQ
30
25
DATA OUT
DATA IN
SW2
• Signal path
:CD
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