Sony CDC-R937 / CDC-X937 Service Manual ▷ View online
13
CDC-R937/X937
2-12. LEVER ASSY (CD HOLDER)
2
special screw
1
torsion spring
4
lever assy (CD holder)
3
2-11. LEVER (CD ROLLER) SUB ASSY
3
lever (CD roller) sub assy
1
2
14
CDC-R937/X937
2-14. PICK-UP SUB ASSY
2
leaf spring
3
pick-up sub assy
1
two screws
(+
B 1.4x5
)
2-13. MOTOR (SLED) SUB ASSY
2
motor (sled) sub assy
1
screw
(+
P 1.7x2
)
15
CDC-R937/X937
RDS Adjustment (CDC-R937 only)
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
TU101
MAIN BOARD (CONDUCTOR SIDE)
IC901
IC151
TP1 S.METER
SFR101
RDS Adjustment
RDS Adjustment
IC501
16
CDC-R937/X937
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 (+5 V)
59
RFCT
I
RFRP signal center level input
SECTION 4
DIAGRAMS
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