Read Sharp SD-EX100H (serv.man18) Service Manual online
SD-EX100H
– 72 –
Figure 72 BLOCK DIAGRAM OF IC
IC704 VHiLA6558++-1: Focus/Tracking/Spin/Sled/Loading Driver (LA6558)
Thermal shutdown
MUTE(input ON/OFF)
15.4k
15.4k
11k
11k
VCC
MUTE
VIN1
VG1
VO1+
VO1–
GND
GND
GND
VO2–
VO2+
VG2
VIN2
REG-OUT
REG-IN
VCC
VREF
VIN4
VG4
VO4+
VO4–
GND
GND
GND
VO3–
VO3+
VG3
VIN3
CD
RESET
11k
11k
15.4k
15.4k
Level shift
Level shift
Level shift
Level shift
3.3VREG
Reset
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
1
VCC
Power (short-circuited to pin 30).
2
MUTE
All CH output ON/OFF.
3
VIN1
CH1 input terminal.
4
VG1
CH1 input terminal. (for gain adjustment)
5
VO1+
CH1 output terminal. (noninversion side)
6
VO1–
CH1 output terminal. (inversion side)
7-9
GND
GND terminal
10
VO2–
CH2 output terminal. (inversion side)
11
VO2+
CH2 output terminal. (noninversion side)
12
VG2
CH2 input terminal. (for gain adjustment)
13
VIN2
CH2 input terminal.
14
REG-OUT
Connect the collector of externally provided transistor (PNP). 3.3VREG power output.
15
REG-IN
Connect the base of externally provided transistor (PNP).
16
RESET
Reset output.
17
CD
Reset output delay time setting. (capacitor provided externally)
18
VIN3
CH3 input terminal.
19
VG3
CH3 input terminal. (for gain adjustment)
20
VO3+
CH3 output terminal. (noninversion side)
21
VO3–
CH3 output terminal. (inversion side)
22-24
GND
GND terminal
25
VO4–
CH4 output terminal. (inversion side)
26
VO4+
CH4 output terminal. (noninversion side)
27
VG4
CH4 input terminal. (for gain adjustment)
28
VIN4
CH4 input terminal.
29
VREF
Application of standard voltage of level shift circuit.
30
VCC
Power (short-circuited to pin 1).
Pin
No.
No.
Function
Terminal Name
GND (lowest potential) is connected to pins 7-9 and pins 22-24.
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