Aiwa XR-MSK3 Service Manual page 31

Pin No. Pin Name
34 RFM
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
Anti-reverse input terminal for RF summing amplifier. The gain of RF amplifier is decided by the
I
connection resistance between RF-M and RF-O terminals.
I This is a pin where the selection time constant is externally connected to control the RF level.
O APC amplifier output terminal.
I APC amplifier input terminal.
RFI-V amplifier inverted input pin. These pins are connected to the A+C and B+C pins of the
I
optical pickup, receiving by currents input.
I/O Bias adjustment pin of the focus error amplifier. (Not used)
F and EIV amplifier inverted input pins. These pins are connected to the F and E of the optical
I
pickup, receiving by current input.
Gain adjustment pin of the I-V amplifier E. (When not in use of BAL automatic adjustment)
–
(Not used)
– 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.
Description
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