Read Sharp XL-3000 (serv.man9) Service Manual online
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XL-3000H
IC804 VHiMM1469XH-1: Focus/Tracking/Spin/Sled Driver (MM1469XH)
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
1
CH1-OUT-A
Driver CH1 negative output
2
CH1-OUT-B
Driver CH1 positive output
3
CH1-IN-A
Driver CH1 input
4
CH1-IN-B
Driver CH1 input, gain adjustment pin
5
Tr-B
Connect to external transistor base
6
VREG-OUT
Constant voltage output, connects to external transistor collector
7
MUTE
Driver mute control input
8
GND
GND
9
CH2-IN-B
Driver CH2 input, gain adjustment pin
10
CH2-IN-A
Driver CH2 input
11
CH2-OUT-B
Driver CH2 positive output
12
CH2-OUT-A
Driver CH2 negative output
13
Substrate GND
Substrate GND
14*
OP-OUT
Operational amplifier output
15*
OP-IN(–)
Operational amplifier input, negative
16*
OP-IN(+)
Operational amplifier input, positive
17
CH3-OUT-A
Driver CH3 negative output
18
CH3-OUT-B
Driver CH3 positive output
19
CH3-IN-A
Driver CH3 input
20*
CH3-IN-B
Driver CH3 input, gain adjustment pin
21
Vcc
Vcc
22
Vcc
Vcc
23
BIAS-IN
Bias amplifier input
24
CH4-IN-B
Driver CH4 input, gain adjustment pin
25
CH4-IN-A
Driver CH4 input
26
CH4-OUT-B
Driver CH4 positive output
27
CH4-OUT-A
Driver CH4 negative output
28
Substrate GND
Substrate GND
Pin No.
Port Name
Function
GND (lowest potential) is connected to the frame of pin center.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
28
27
26
D.BUF
OP-IN(–)
OP-IN(+)
CH3-OUT-A
CH3-OUT-B
CH3-IN-A
CH3-IN-B
Vcc
Vcc
BIAS-IN
CH4-IN-B
CH4-IN-A
CH4-OUT-B
CH4-OUT-A
SUBGND
OP-OUT
SUBGND
CH2-OUT-A
CH2-OUT-B
CH2-IN-A
CH2-IN-B
GND
MUTE
VREG-OUT
Tr-B
CH1-IN-B
CH1-IN-A
CH1-OUT-B
CH1-OUT-A
D.BUF D.BUF
D.BUF D.BUF
D.BUF
VCC
VCC
D.BUF
D.BUF : Driver Buffer
T.S.D : Thermal Shut Down
D.BUF
DRIVER MUTE
Level shift
25
24
23
22
21
20
19
18
17
16
10k
Ω
50k
Ω
50k
Ω
10k
Ω
10k
Ω
10k
Ω
T.S.D
Level shift
10k
Ω
Level shift
10k
Ω
Level shift
Figure 55 BLOCK DIAGRAM OF IC
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