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Pin No.
Pin Name
VO
Description
32
RF_I
I
Input terminal by capacity combination of RF summing amplifier.
33
RF_O
O
Output terminal of RF summing amplifier. Checkpoint of Eye pattern.
Anti-reverse input terminal for RF summing amplifier.
34
RF_M
I
The gain of RF amplifier is decided by the connection resistance between RF_M and
RFO terminals.
s.
eure
:
This is a pin where the selection time constant is externally connected to control the
RF level.
36
LD
O
APC amplifier output terminal.
37
PD
I
APC amplifier input terminal.
RFI-V amplifier inverted input pin.
38, 39
PD1, PD2
I
These pins are connected to the A+C and B+C pins of the optical pickup, receiving by
currents input.
40
FEBIAS
VO
Bias adjustment pin of the focus error amplifier.
F and EIV amplifier inverted input pins.
41, 42
F,E
I
These pins are connected to the F and E of the optical pickup, receiving by current
input.
iB
7
_
Gain adjustment pin of the I-V amplifier E. (When not in use of BAL automatic
adjustment)
44
VEE
—
GND connection pin.
45
TEO
O
Output terminal for tacking-error amplifier. Output E-F signal.
46
LPFI
I
BAL adjustment comparator input pin. (Input through LPF from TEO)
47
TEI
I
Input terminal for tracking error.
48
ATSC
I
Window-comparator input terminal for detecting ATSC.
49
TZC
I
Input terminal for tracking-zero cross comparator.
50
TDFCT
I
Capacitor connection pin for the time constant used when there is defect.
51
VC
O
Output terminal for DC voltage reduced to half of VCC+VEE.
52
FZC
I
Input terminal for focus-zero cross comparator.
21
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