Sharp XL-30V Service Manual page 55

IC804 VHiLA6548D/-1: Focus/Tracking/Spin/Sled Driver (LA6548D)
Pin No.
Port Name
1 VCC
2 MUTE
3 VIN1
4 VG1
5 VO1+
6 VO1-
7-9 GND
10 VO2-
11 VO2+
12 VG2
13 VIN2
14 REG-OUT
15 REG-IN
16* RESET
17* CD
18 VIN3
19* VG3
20 VO3+
21 VO3-
22-24 GND
25 VO4-
26 VO4+
27 VG4
28 VIN4
29 VREF
30 VCC
*GND should have the lowest potential as connected with pins 7 to 9 and pins 22 to 24.
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
30 29
1 2
Power (short-circuit with pin 30)
All channels output ON/OFF
CH1 input terminal
CH1 input terminal (for gain control)
CH1 output terminal (counter-inversion)
CH1 output terminal (inversion)
GND terminal.
CH2 output terminal (inversion)
CH2 output terminal (counter-inversion)
CH2 input terminal (for gain control)
CH2 input terminal
Connect collector of the external transistor (PNP). 3.3VREG output.
Connect base of external PNP transistor.
Reset output.
Reset output delay time setting (with external capacitor)
CH3 input terminal
CH3 input terminal (for gain control)
CH3 output terminal (counter-inversion)
CH3 output terminal (inversion)
GND terminal.
CH4 output terminal (inversion)
CH4 output terminal (counter-inversion)
CH4 input terminal (for gain control)
CH4 input terminal
Application of the reference voltage.
Power supply (short-circuit with pin 1)
28 27 26 25
Level shift
Level shift
3 4 5 6
Figure 55 BLOCK DIAGRAM OF IC
Function
24 23 22 21
Level shift
Level shift
7 8 9 10
– 55 –
20 19 18 17
11 12 13 14
XL-30V
16
15