Aiwa AZG-1 Service Manual page 13

Pin No. Pin Name
32 RF_I
33 RF_O
34 RF_M
35 RFTC
36 LD
37 PD
38, 39 PD1, PD2
40 FEBIAS
41, 42 F, E
43 EI
44 VEE
45 TEO
46 LPFI
47 TEI
48 ATSC
49 TZC
50 TDFCT
51 VC
52 FZC
I/O
I Input terminal by capacity combination of RF summing amplifier.
O Output terminal of RF summing amplifier. Checkpoint of Eye pattern.
Anti-reverse input terminal for RF summing amplifier.
I 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
I
RF level.
O APC amplifier output terminal.
I APC amplifier input terminal.
RFI-V amplifier inverted input pin.
I These pins are connected to the A+C and B+C pins of the optical pickup, receiving by
currents input.
I/O Bias adjustment pin of the focus error amplifier. (Not connected)
F and EIV amplifier inverted input pins.
I 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.
O Output terminal for tacking-error amplifier. Output E-F signal.
I BAL adjustment comparator input pin. (Input through LPF from TEO)
I Input terminal for tracking error.
I Window-comparator input terminal for detecting ATSC.
I Input terminal for tracking-zero cross comparator.
I Capacitor connection pin for the time constant used when there is defect.
O Output terminal for DC voltage reduced to half of VCC+VEE.
I Input terminal for focus-zero cross comparator.
17
Description