Aiwa LCX-K117, Service Manual

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RF_O
RF_M
RFTC
LD
PD
PD1, PD2
FEBIAS
F, E
EI
VEE
TEO
LPFI
TEI
ATSC
TZC
TDFCT
VC
FZC
Pin No. Pin Name I/O Description
33
34
35
36
37
38, 39
40
41, 42
43
44
45
46
47
48
49
50
51
52
O
I
I
O
I
I
I/O
I
—
—
O
I
I
I
I
I
O
I
Output terminal of RF summing amplifier. Checkpoint of Eye pattern.
Anti-reverse input terminal for RF summing amplifier.
The gain of RF amplifier is decided by the connection resistance between RF_M and
RFO terminals.
This is a pin where the selection time constant is externally connected to control the
RF level. (Pull down)
APC amplifier output terminal.
APC amplifier input terminal.
RFI-V amplifier inverted input pin.
These pins are connected to the A+C and B+C pins of the optical pickup, receiving by
currents input.
Bias adjustment pin of the focus error amplifier. (Not connected)
F and EIV amplifier inverted input pins.
These pins are connected to the F and E of the optical pickup, receiving by current
input.
Gain adjustment pin of the I-V amplifier E. (When not in use of BAL automatic
adjustment)
GND connection pin.
Output terminal for tacking-error amplifier. Output E-F signal.
BAL adjustment comparator input pin. (Input through LPF from TEO)
Input terminal for tracking error.
Window-comparator input terminal for detecting ATSC. (Pull up)
Input terminal for tracking-zero cross comparator.
Capacitor connection pin for the time constant used when there is defect. (Pull up)
Output terminal for DC voltage reduced to half of VCC+VEE.
Input terminal for focus-zero cross comparator.