Sony CDP-CX50 Service Manual page 27

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Pin No. Pin Name I/O
38 SLOF I Sled servo off control input
39 CV– I CLV error signal is input from the digital signal processor
40 CV+ I CLV error signal is input from the digital signal processor
41 RFSM O RF output
Works together with the RFSM pin to set the RF gain and the 3T compensation constant
42 RFS– I
for the EFM signal
SLI (Slice Level Control) is output to control a data slice level of the RF waveform by the
43 SLC O
digital signal processor
44 SLI I Input pin for controlling a data slice level by the digital signal processor
45 DGND – Digital Ground
Focus search smoothing capacitor output
46 FSC O
47 TBC I TBC (Tracking Balance Control) sets a EF balance variable range
48 NC – Not used
49 DEF O Defect detection output for a disc
50 CLK I Reference clock input The 4.23 MHz of the digital signal processor is input
51 CL I Microprocessor command clock input
52 DAT I Microprocessor command data input
Microprocessor command chip enable input
53 CE I
54 DRF O DRF (Defect RF) outputs a RF level detection
FSS (Focus Search Select) is a switching pin for the focus search mode (±search/+search
55 FSS I
for a reference voltage)
56 VCC2 – Servo system and digital system VCC
T E
L 1 3 9 4 2 2 9 6 5 1 3
57 RFFI I Reference voltage bus control is connected
Reference voltage output
58 VR O
59 LF2 I Constant setting for a disc defect detection
60 PH1 I Connected to the capacitor for the RF signal peak hold
Connected to the capacitor for the RF signal bottom hold
61 BH1 I
62 LDD O APC circuit output
63 LDS I APC circuit input
VCC1 – RF system VCC
64
• Abbreviation
EFM : Eight to Fourteen Modulation
APC : Auto Power Control
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Function
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• IC102 DIGITAL SIGNAL PROCESSOR (LC78622E)
Pin No. Pin Name I/O
1 DEFI I
2 TAI I
3 PDO
O
4
VVSS –
5 ISET I
6 VVDD –
7 FR
I
8 VSS –
9 EFMO O
10 EFMIN
I
11 TEST2 I
12 CLV+ O
13 CLV–
O
14 V/P
O
15 HFL
I
16
TES I
17 TOFF O
18 TGL O
19 JP+
O
20 JP– O
Q Q
3 7 6 3 1
21 PCK O
22 FSEQ O
23 VDD –
24 CONT1 I/O
25
CONT2 I/O
26 CONT3
I/O
27 CONT4
I/O
28 CONT5
I/O
• Abbreviation
PLL : Phase Locked Loop
EFM : Eight to Fourteen Modulation
u 1 6 3
.
2 4
9 9 8
Function
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
5 1 5 0 8 9 2 4 9
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
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8 2 9 9