Sharp XL-3000 Service Manual download pdf (Page 52)

XL-3000/3000C

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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

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

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

10 11 12

13 14

D.BUF

OP-IN(–)

OP-IN(+)

CH3-OUT-A

CH3-OUT-B

CH3-IN-A

CH3-IN-B

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

D.BUF

D.BUF : Driver Buffer

T.S.D : Thermal Shut Down

D.BUF

DRIVER MUTE

Level shift

23 22 21

18 17

10kΩ

50kΩ

10kΩ

T.S.D

Level shift

10kΩ

Level shift

10kΩ

Level shift

Figure 52 BLOCK DIAGRAM OF IC

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 63 64

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Sharp XL-3000 Service Manual Page 52

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