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Pin No.
Symbol
Vo
Description
20
FSCH
0
Time constant external pin to generate focus search waveform
21
VREGI
l
External regulator voltage input pin for VCO
22
ISET
Determing the peak value of focus search, track jump and SLED kick
23
VREG
oO
3.5V Regulator output pin
24
FVC
I
Pin connected external resistor to adjust free running frequency of VCO
25
SMEF
I
Providing an external LPF time constant of CLV SERVO Loop
26
BPF
|
Providing time constant for Loop filter of VCO
27
MCK
|
Clock input pin from micom
28
MLT
I
Latch input pin from micom
29
MDAT
|
Data input pin from micom
30
RESET
|
Reset input pin from micom, reset at "L"
31
LOCK
Pin for operation of the sled runaway prevention function at "L"
32
TRCNT
Track count output pin
33
ISTAT
Internal status output pin
34
AVEE (S)
Analog negative power supply input pin for SERVO part
35
APDI
I
Input pin of DSP phase comparison output (PHAS)
36
F8M
oO
Output pin of analog VCO
Normal speed = 8.64 MHz, Double speed = 17.28MHz
'37
AASC
Auto-Asymmetry control input pin
38
EFMO
oO
EFM comparator output pin
39
SLEN
I
Non-inverting input pin of SLED SERVO amplifier
40
SLEO
oO
Output pin of SLED SERVO amplifier
41
SLEI
| .
Inverting input pin of SLED SERVO amplifer
42
TEST2
Test input pin to change speed mode
Normal speed = "H", Double speed = "L"
43
SPDI
I
Inverting input pin of spindle servo amplifier
44
SPDLO
O
Spindle servo amplifier output pin
45
FCE
|
Invering input pin of focus servo complifier.
46
FSEO
0
Output pin of focus sevoe amplifier
47
TKEI
|
Non-inverting input pin of tracking servo amplifier
48
TKEO
O
Output pin of tracking servo amplifier
49
N/C
No connection
50
ATS
|
Anti-shock input pin
51
TZC
I
Tracking Zero Grossing input
RCD-750
~99 =
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