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Special Circuit Descriptions
5-1-4 Tracking Sled Servo System (KA9220) : WIC01
The capacitor between pins 15 and 16 attenuates high frequencies when TG2 is off. The maximum frequency of
tracking phase compensation is inversely proportional to the resistance connected to pin 7 (about 1.2kHz at 470k).
The tracking jump (FWD and REV) is determined when TM3 and TM4 are ON, and the peak voltage induced from
tracking coil is decided by both TM3 and TM4 current values and feedback resistance of pin 47.
Tracking jump max voltage = TM3 (TM4) current x feedback reisistance.
0.022UF
0.047UF
TE 1
20K
0.1UF
0.1UF
FWD or REV sled kick occurs when TM5 or TM6 is ON, and the peak voltage added to sled motor is decided by
TM5 or TM6 current and the feedbadk resistance of pin 41.
Sled jump max voltage= TM5 (TM6) current x feedback resistance
Each SW current is decided by the resistance connected to pin 22 and 23.
When the resistance is about 150½,
TM3 or TM4 = 11µA,
TM5 or TM6 = 22µA,
This current is inversely proportional to the resistor, variable within a range of 5 to 40µA for TM3.
STOP is the ON/OFF detection signal for the limit SW (or the sled motorÕs innermost cirumference).
5-1-5 Motor Drive (LB1649) : UIC4
OUT2
OUT1
10
3
1
VCC1
11
Input Logic
IN 1
Fin
5-2
TZC
51
TZC
100K
1K
50
BPF
1K
ATC
150K
100K
52
TE2
470K
54
DFCT
TDFC1
10K
110K
20K
RTG
16
82K
TGSW
15
470K
TG2
OUT3
4
Input Logic
2
12
6
5
IN 2
VZ1
VZ2
IN3
S STOP
ATS
TM6
TM5
680K
5.5U
TM4
66PF
TM3
5.5U
PHASE
COMPENSATION
10K
TM7
PFSET
7
470K
OUT4
9
7
VCC2
8
IN4
180K
22
23
ISET
VREG
100K
S STOP
8
100K
SLED
1K
40
56K
SLEI
41
SLEN
39
10K
TM2
120K
TKEI
47
100K
TKEO
48
90K
IN 1
2
OUT1
0
0
1
0
0
1
1
1
IN 3
4
OUT3
0
0
1
0
0
1
1
1
Samsung Electronics
SLED
DRIVER
TRACKING
COIL
OUT1
L
L
H
L
L
H
L
L
OUT4
L
L
H
L
L
H
L
L
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