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RO1

IC4405

12

6

12

13

8

1

+

R-2ch input

R-2ch output

RA2

R-1ch input

RA1

IC4401

IC4436

LCD

R-1ch output

LCD

RB1

R2BC

RB1

R1BC

RW1

R2WC

VR1

RW1

R1WC

VR1

R-3ch input

R-3ch

RA3

LCD

RB1

R3BC

RW1

R3WC

VR1

R-4ch input

R-4ch output

RA4

LCD

RB1

R4BC

RW1

R4WC

VR1

R-5ch input

R-5ch output

RA5

IC4407

Q4405

LCD

RB1

R5BC

RW1

R5WC

VR1

R-6ch input

R-6ch output

RA6

IC4406

IC4407

Q4406

LCD

RB1

R6BC

RW1

R6WC

VR1

RIP

RIN

14

R signal's black level setting 

R signal's white level setting

Video center voltage setting

Q4401
V/I conversion

IC4402

IC4436

Q4402

RO2

IC4403

IC4436

Q4403

RO3

IC4404

IC4407

Q4404

RO4

RO5

RO6

Feedback voltage 
to correct en error 
from R-1ch black 
level reference

Feedback voltage to correct an error from 
R-1ch white  level voltage

R1BC

IC4415

IC4416

IC4430

IC4429

IC4422

IC4432

IC4434

13

14

11

8

10

14

12

R2BC

R3BC

R4BC

3

5

4

1

3

7

5

R1B1

R1B1

R2B1

R3B1

R4B1

R5B1

R6B1

R1B2

R2B1

R2B2

R3B1

R4B1

R4B2

R3B2

PINV

IC4423

R1B2

R2B2

R3B2

R4B2

R5B2

R6B2

REFBK

-4V

RRW

RRB

IC4417

IC4431

R5BC

R6BC

R5B1

R6B1

R6B2

R5B2

IC4418

RO1

RO2

RO3

RO4

RO5

RO6

NINV

–

+

+

6

5

7

R1WC

IC4412

IC4413

IC4427

IC4426

IC4420

IC4433

IC4434

13

14

11

8

10

14

12

R2WC

R3WC

R4WC

3

5

14

1

3

7

5

R1W1

R1W1

R2W1

R3W1

R4W1

R5W1

R6W1

R1W 2

R2W 1

R2W 2

R3W1

R4W1

R4W2

R3W2

PINV

IC4421

R1W2

REFBK

-4V

RRW

IC4414

IC4428

R5WC

R6WC

R5W1

R6W1

R6W2

R5W2

IC4419

RO1

RO2

RO3

RO4

RO5

RO6

NINV

–

+

+

2

3

1

MUX0

FRP2

MUX1

MUX2

SEL0

SEL1

SEL2

Video center top

Video center bottom

Hall capacitor: charged for 1 field and 

held for 11 fields

Black voltage correction 
gate pulse available during 
V blanking period

Video center 
reference

White reference

Black reference

Black voltage 
error detection

Black voltage correction 
voltage held for 1 field

White side

Black side

White voltage 
correction voltage 
held for 1 field

White voltage correction 
gate pulse available 
during V blanking period

White voltage 
error detection

PINV signal from FRP1 latched 
by REFW, changeable for each 
field, polarity shown at correction: 
NINV signal by inverting the PINV 
signal: IC4422, IC4423, IC4420 
and IC4421 controlled by PINU 
and NINV (one active and the 
other at high impedance) according 
to polarity at correction

Channel select signal changeable for 1 field

Polarity-inverted signal, 
inverted from FRP1, 
changeable for each line, 
to select feedback voltage 
according to signal polarity

R2W2

R3W2

R4W2

R5W2

R6W2

MUX0

MUX1

MUX2

CH 1

0

0

0

2

1

0

0

3

0

1

0

4

1

1

0

5

0

0

1

6

1

0

1

H : +12V
L  :     0V

Channel select signal

Channel select signal 
with levels changed 
from MUX0, MUX1 
and MUX2 signals

0V

FRP1

10, 11

IC4409

RMB1
14

RMB2

15

4

RRB

IC4410

3

2

+

_

RB1

-4V

+5V

1

+5V to be set at center level

13

12

1

2

3

5

9

RBN

RBP

6

7

5 +

_

IC4411

X (-1)

8

IC4411

RB

RW

10

9

+

_

IC4034

18

19

FRP1

IC4408

14

15

4

RRW

IC4410

12

13

+

_

RW1

14

13

12

1

2

3

5

9

RWN

RWP

2

1

3 +

_

IC4411

X (-1)

14

12

13

+

_

RMW1

RMW2

0V

Fixed at H; RRW always as RMW2

Fixed at H; RRB always as RMB2

Set a personal computer’s serial port referring to the table below.

Data transfer rate

SPEED

9600

bps

Data length

DATA LENGTH

8

bit

Parity

PARITY

None

Stop bit

STOP BIT

1

bit

Flow control

FLOW CONTROL

None

The command, parameter and line change code are sent from the computer in this order. The unit processes the
instructions from the computer and sends back the response code to the computer.

C1

Line change code (OD

H

)

Line change code (OD

H

)

Line change code (OD

H

)

C2

C3

C4

P1

P2

P3

P4

0

K

Command,
4 characters

Parameter,
4 characters

OK response

E

R

R

NG response (transfer error or wrong command)

When two or more codes are sent, the OK response code from the unit must be confirmed for each control instruction.
Now transfer the next control instruction.

»

 Note: The existing personal computer control function cannot put the LCD projector’s status on the computer.

Transfer the adjustment menu display command and get the projector’s status displayed on the screen.
When any other control instruction than the menu display command is received, the instruction is carried
out without getting it displayed on the screen.

20

+

C4

+

C2

–10V

19

18

17

+

C4

GND

C4

Vss

16

15

14

13

12

11

STBY

VCHA

DOUT1

DOUT2

RIN1

RIN2

300

Ω

300

Ω

5.5k

Ω

5.5k

Ω

ROUT1

ROUT2

DIN1

DIN2

10

9

8

7

6

5

4

3

2

1

+

–

–

–

C1

VDD

VCC

C1

C5

+

C5

C5

+

+

C1

+

C3

+10V

+3.3V

or

+5V