Sony CDP-CX50 / CDP-CX571 Service Manual ▷ View online
— 20 —
7-1. CIRCUIT BOARDS LOCATION
SECTION 7
DIAGRAMS
POWER SW board
LED board
DISPLAY board
AUDIO board
DISC SENSOR (S) board
TABLE SENSOR board
BD board
SW board
MOTOR board
DISC SENSOR (R) board
— 38 —
7-8. IC PIN FUNCTIONS
• IC101 FOCUS/TRACKING/SLED SERVO (LA9240M)
Pin No.
Pin Name
I/O
Function
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
FIN2
FIN1
E
F
TB
TE–
TE
TESI
SCI
TH
TA
TD–
TD
JP
TO
FD
FD–
FA
FA–
FE
FE–
AGND
SP
SPI
SPG
SP–
SPD
SLEQ
SLD
SL–
SL+
JP–
JP+
TGL
TOFF
TES
HFL
Connected to the pick-up photodiode
Added with FIN1 to create RF signal, subtracted with FIN1 to create FE signal
Connected to the pick-up photodiode
Connected to the pick-up photodiode Subtracted with F to create TE signal
Connected to the pick-up photodiode
DC component of the TE signal is input
Connects the TE signal gain setting resistor between TE pins
TE signal output
TES (Track Error Sense) comparator input. The TE signal is band-passed and input
Shock detection input
Tracking gain time constant setting
TA amplifier output
Creates a tracking phase compensation constant between TD and VR pins
Tracking phase compensation setting
Tracking jump signal (kick pulse) amplitude setting
Tracking control signal output
Focusing control signal output
Creates a focusing phase compensation constant between FD and FA pins
Creates a focusing phase compensation constant between FD- and FA- pins
Creates a focusing phase compensation constant between FA and FE pins
FE signal output
Connects the FE signal gain setting resistor between TE pins
Analog signal Ground
Single end output of CV+ and CV- pin signal
Spindle amplifier input
Gain setting resistor is connected when the spindle 12cm mode
Works together with the SPD pin to connect to the spindle phase compensation constant
Spindle control signal output
Sled phase compensation constant is connected
Sled control signal output
Sled feeding signal is input from the microprocessor
Sled feeding signal is input from the microprocessor
Tracking jump signal is input from the DSP
Tracking jump signal is input from the DSP
Tracking gain control signal is input from the DSP Gain becomes low when TGL is “H”
Tracking off control signal is input from the DSP
Tracking becomes off when TOFF is “H”
Outputs TES signal to the DSP
HFL (High Frequency Level) is used to determine whether the main beam is positioned
on a pit or a mirror
I
I
I
I
I
I
O
I
I
I
O
I
O
I
O
O
I
O
I
O
I
–
O
I
I
I
O
I
O
I
I
I
I
I
I
O
O
— 39 —
Pin No.
Pin Name
I/O
Function
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
SLOF
CV–
CV+
RFSM
RFS–
SLC
SLI
DGND
FSC
TBC
NC
DEF
CLK
CL
DAT
CE
DRF
FSS
VCC2
RFFI
VR
LF2
PH1
BH1
LDD
LDS
VCC1
Sled servo off control input
CLV error signal is input from the digital signal processor
CLV error signal is input from the digital signal processor
RF output
Works together with the RFSM pin to set the RF gain and the 3T compensation constant
for the EFM signal
SLI (Slice Level Control) is output to control a data slice level of the RF waveform by the
digital signal processor
Input pin for controlling a data slice level by the digital signal processor
Digital Ground
Focus search smoothing capacitor output
TBC (Tracking Balance Control) sets a EF balance variable range
Not used
Defect detection output for a disc
Reference clock input
The 4.23 MHz of the digital signal processor is input
Microprocessor command clock input
Microprocessor command data input
Microprocessor command chip enable input
DRF (Defect RF) outputs a RF level detection
FSS (Focus Search Select) is a switching pin for the focus search mode (±search/+search
for a reference voltage)
Servo system and digital system VCC
Reference voltage bus control is connected
Reference voltage output
Constant setting for a disc defect detection
Connected to the capacitor for the RF signal peak hold
Connected to the capacitor for the RF signal bottom hold
APC circuit output
APC circuit input
RF system VCC
I
I
I
O
I
O
I
–
O
I
–
O
I
I
I
I
O
I
–
I
O
I
I
I
O
I
–
• Abbreviation
EFM : Eight to Fourteen Modulation
APC : Auto Power Control
APC : Auto Power Control
— 40 —
• IC102 DIGITAL SIGNAL PROCESSOR (LC78622E)
Pin No.
Pin Name
I/O
Function
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
DEFI
TAI
PDO
VVSS
ISET
VVDD
FR
VSS
EFMO
EFMIN
TEST2
CLV+
CLV–
V/P
HFL
TES
TOFF
TGL
JP+
JP–
PCK
FSEQ
VDD
CONT1
CONT2
CONT3
CONT4
CONT5
I
I
O
–
I
–
I
–
O
I
I
O
O
O
I
I
O
O
O
O
O
O
–
I/O
I/O
I/O
I/O
I/O
Defect detection signal (DEF) input
(Be sure to connect to 0 when not in use)
PLL
Test input
Incorporates a pull-down resistor
Be sure to connect to 0V
PLL
Phase comparison output for external VCO control
PLL
Ground for the built-in VCO
Be sure to connect to 0 when not in use
Connected to a current adjusting resistor for the PDO output
Built-in VCO power supply
Adjusts the VCO frequency range
Digital Ground
Be sure to connect to 0
Slice level control
EFM signal output
Slice level control
EFM signal input
Test input
Incorporates a pull-down resistor
Be sure to connect to 0V
Disc motor control output
3-value output available depending on the command
Rough servo/phase control automatic switching monitor output
“H”:rough servo, ‘’L”:phase servo
Tracking detection signal input
Schmidt input
Tracking error signal input
Schmidt input
Tracking OFF output
Tracking gain switching output
Raises gain when “L”
Track jump control output
3-value output available depending on the command
EFM data playback clock monitor
4.3218 MHz when phase is locked
Sync signal detection output
“H” when a sync signal detected from the EFM signal and
that generated internally coincide
Digital power supply
General purpose output 1
Performs control using a serial data command from the
microprocessor
When not in use, connect to 0V by setting to an input or set to an open
state by setting to an output
General purpose output 2
Performs control using a serial data command from the
microprocessor
When not in use, connect to 0V by setting to an input or set to an open
state by setting to an output
General purpose output 3
Performs control using a serial data command from the
microprocessor
When not in use, connect to 0V by setting to an input or set to an open
state by setting to an output
General purpose output 4
Performs control using a serial data command from the
microprocessor
When not in use, connect to 0V by setting to an input or set to an open
state by setting to an output
General purpose output 5
Performs control using a serial data command from the
microprocessor
When not in use, connect to 0V by setting to an input or set to an open
state by setting to an output
• Abbreviation
PLL : Phase Locked Loop
EFM : Eight to Fourteen Modulation
EFM : Eight to Fourteen Modulation
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