Sony CDC-R237 Service Manual ▷ View online
13
CDC-R237
2-13. PICK-UP SUB ASSY
1
B 1.4x5
2
leaf spring
3
pick-up sub assy
14
CDC-R237
RDS Adjustment
Setting: 98 MHz
31 dBµV (EMF)
1 kHz (Modulation Frequency)
45 kHz DEV
1 kHz (Modulation Frequency)
45 kHz DEV
Check point: S.METER test point
Adjustment location: SFR101
Specification: 2.0±0.1 V
Procedure: Set to FM98.0 MHz and adjust SFR101 so that the test
point is 2.0±0.2 V.
Adjustment Location:
SECTION 3
ELECTRICAL ADJUSTMENT
IC401
TU101
MAIN BOARD (CONDUCTOR SIDE)
IC901
IC151
CON702
TP16 S.METER
SFR101 RDS Adjustment
15
CDC-R237
4-1. IC PIN DESCRIPTIONS
• IC241 TC94A09F-303 (DIGITAL SIGNAL SERVO PROCESSOR) (SERVO BOARD)
Pin No.
Pin Name
I/O
Pin Description
1 – 9
S1 – 9 (OT5 – 13)
O
LCD segment signal output/Output port Not used. (Open)
10
S10 (OT14/ZDET)
O
LCD segment signal output/Output port/CD signal Not used. (Open)
11
S11 (OT15/CLCK)
O
LCD segment signal output/Output port/CD signal Not used. (Open)
12
S12 (OT16/DATA)
O
LCD segment signal output/Output port/CD signal Not used. (Open)
13
S13 (OT17/SFSY)
O
LCD segment signal output/Output port/CD signal Not used. (Open)
14
S14 (DT18/LRCK)
O
LCD segment signal output/Output port/CD signal Not used. (Open)
15
P8-0 (S15/BCK)
I/O
I/O port/LCD segment signal output/CD signal Not used. (Open)
16
P8-1 (S16/AOUT)
I/O
I/O port/LCD segment signal output/CD signal Not used. (Open)
17
P8-2 (S17/MBOV)
I/O
I/O port/LCD segment signal output/CD signal Not used. (Open)
18
P8-3 (S18/IPF)
I/O
I/O port/LCD segment signal output/CD signal Not used. (Open)
19
MVDD1
—
Power supply pin (+5 V)
20
MVSS
—
Ground pin
21
LMT SW
I
Limit switch signal input
22
P1-1 (K1)
I
Key signal input
23
P1-2 (K2)
I
Key signal input
24
SW3
I
Key signal input
25
SRQ
I
CDS SRQ signal input
26
LM CONT
O
Loading motor speed control signal output
27
P3-2 (ADIN2)
I/O
I/O port/AD analog voltage signal input Not used. (Open)
28
P3-3 (ADIN3)
O
Mute signal output
29
P4-0 (BUZR/AD4)
I/O
I/O port/AD analog voltage signal input/buzzer signal output Not used. (Open)
30
DATA IN
I
CDS serial data signal input
31
DATA OUT
O
CDS serial data signal output
32
CLOCK
I/O
CDS serial clock signal input/output
33
P2-0/EMPH
I/O
Emphasis signal input/output
34
P2-1/HSO
I/O
I/O port/1 bit DAC input Not used. (Open)
35
P2-2/LRCK
I/O
I/O port/1 bit DAC input Not used. (Open)
36
P2-3/DATA
I/O
I/O port/1 bit DAC input Not used. (Open)
37
IN1/BCK
I
Input port/1 bit DAC input Connect to ground.
38
TESTC
I
Test mode control input Not used. (Open)
39
DT19 (/HSO)
O
Output port/CD control signal output Not used. (Open)
40
DT20 (SPCK)
O
Output port/CD control signal output Not used. (Open)
41
DT21 (SPDA)
O
Output port/CD control signal output Not used. (Open)
42
DT22 (COFS)
O
Output port/CD control signal output Not used. (Open)
43
DOUT
O
Digital out signal output Not used. (Open)
44
SBSY
O
Sub code block sync signal output Not used. (Open)
45
SBOK
O
Sub code Q data signal output Not used. (Open)
46
VDD1
—
Power supply pin (+5 V)
47
VSS1
—
Ground pin
48
P2VREF
—
PLL 2 voltage reference pin
49
PDO
I
EFM/PLCK signal difference error signal input
50
TMAX
I
TMAX detect signal input
51
LPFN
I
Inversion signal input of amplifier for lowpass filter
52
LPFO
O
Signal output of amplifier for lowpass filter
53
PVREF
I
PLL voltage reference input
54
VCOF
O
VCO filter signal output
55
AVSS
—
Ground pin
56
SLCO
O
DAC signal output
57
RFI
I
RF signal input
58
AVDD
—
Power supply pin
59
RFCT
I
RFRP signal center level input
SECTION 4
DIAGRAMS
16
CDC-R237
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)
Click on the first or last page to see other CDC-R237 service manuals if exist.