Sanyo DC-F320, Service Manual

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BLOCK DIAGRAM DESCRIPTION
(SERVO
SIGNAL PROCESSOR)
connection pin for detect time
Ground this pin through a capacitor when
decreasing the focus
high-frequency gain.
focus servo low frequency.’
drive
1 3 d r i v e o u t p u t .
14 amplifier non-inverted input.
1 5 a m o l i f i e r n e a a t i v e i n p u t .
0 drive
17
Setting pin fo search, Tracking jump and
Sled kick cur
19 CLK data transfer clock inputfro
I I
inoutfrom CPU.
21
DATA
Serial data input from CPU.
XRST
Reset input; resets at Low.
0 Track number count signal output.
24 SENS
0 Outputs FZC, DFCT, TZC, Gain, BAL, and
others according to the command from CPU.
FOK
0 Focus OK comparator output.
lC497
IC231 LA1 832ML
CONTROL
OUTPUT PASS
No. PIN NAME
Function
I
c c 2
Input pin for the DEFECT bottom hold output
capacitance-coupled.
27 c c 1
DEFECT bottom hold output.
CB
Connection pin for DEFECT bottom hold
capacitor.
29
Connection pin for hold capacitor.
comparator non-inverted input.
input pin for the RF summing amplifier output
capacitance-coupled.
31
RF summing amplifier output. Eye pattern check
RF summing amplifier inverted input. The RF
I amplifier gain is determined by the resistance
connected between this pin and
pin.
33 LD 0 Power Controller) amolifier output.
34 PHD I Power Controller) amplifier input.
I-V amolifier inverted Connect these
these pins to the photo diodes F and E.
40 El
I-V amplifier E gain adjustment. (When not using
automatic balance adjustment.)
41 VEE
Ground
42 TEO
Tracking error amplifier output. E-F signal
Comparator input for balance adjustment. (Input
from TEO through LPF.)
44
TEI I Tracking error input.
45 ATSC
I Window comparator input for ATSC detection.
46
Tracking zero-cross comparator input.
47 TDFCT I
Capacitor connection pin for defect time
VC
0 + 2 DC voltaae output.
INPUT
OUTPUT
GND
28