Ic Block Diagram 81 Description - Sanyo DC-F430AV Service Manual

(SERVO SIGNAL PROCESSOR)
Ground this pin through a capacitor when
FGD I
decreas-ing the focus servo high-frequency gain.
External time constant setting pin for increasing
5 F L B
the focus servo low frequency.
6
0 F o c u s dke.outout.
Focus amplifier negative input.
External
focus servo wavefomx
External time constant setting
TGU I
T G 2
I track-ing high frequency gain.
High cut off frequency setting pin for focus and
tracking phase compensation amplifier.
Sled ampltfrer
16
Sled drive output.
Setting pin for Focus search, Tracking jump and
17
Sled kick current.
1 8
I
I
I
19 I C L K I ISerial
X L T Latch input from CPU.
2 1 D A T A Serial data input from CPU.
X R S T I Reset inout: resets at Low.
0
Track number count signal output.
Outputs FZC, DFCT, TZC, Gain, BAL, and
24 S E N S
others according to the command from CPU.
F O K
25 0 Focus OK comparator output.
time constant setting pin
pin for switching
high frequency gain.
time constant setting pin
amolifier neaative inout
non-Inverted Input.
data transfer clock inout from CPU.
.
NAME 1 VO 1
No. PIN
2 6 c c 2
27 cc1
CB
I
RF-M
for generating
for switching
4 1 VEE
T E O
42
1
43
Function
0 Input pin for the 0
capacitance-coupled.
I DEFECT bottom hold output.
,
I
Connection oin for DEFECT bottom hold
c ,
I, pin for MIRR h o l d
non-inverted input. '
ante-c
RF summing amplifier inverted input. The RF
amplifier gain is determined by the resistance
connected between this pin and RF0 pin.
APC(Auto Power Controller) amplifier input.
RF I-V amolifier inverted input. Connect these
pins to the'photo diodes A $ C and B + D pins.
diodes A i C and B + D pins.
I Bias adjustment of focus error amplifier.
, F I-V and E I-V amplifier inverted input. Connect
these pins to the photo diodes F and E.
F I-V and E I-V amplifier inverted input. Connect
these pins to the photo diodes F and E.
I-V amplifier E gain adjustment. (When not usinS
balance adjustment.)
Tracking error amplifier output. E-F signal
Comparator input for balance adjustment. (Input
from TEO through LPF.)
Window comparator input for ATSC detection.
(VCC + VEE) / 2 DC voltage output.
bottom hold output
I