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9

5V(LUD)

BL

BR

GY

11

LUD/

13

GND2(LUD)

3

2

1

LUD

1

2

3

CN-3

CN-KT 12pin

CN-A

10

5V(LPED)

BL

PL

GY

12

LPED/

14

GND2(LPED)

3

2

1

LPED

4

5

6

CN-4

1

24Vout

RD

RD

2

24V(LLSW)

7

8

LLSW

15

5V(LPFD)

BL

BR

GY

17

LPFD/

19

GND2(LPFD)

1

3

2

LPFD

1

2

3

CN-7

CN-FT 3pin

16

5V(LTOD)

BL

BR

GY

18

LTOD/

20

GND2(LTO)

1

2

3

LTOD

CN-8

5

24V(LPFC)

RD

PK

6

LPFC/

1

2

LPFC

9

10

CN-5

7

24V(LPFS)

RD

LB

8

LPFS/

1

2

LPFS

11

12

CN-1

CN-2

7

U

PL

LB

PK

8

V

9

W

9

8

7

CN-10

4

HV

LB

PK

GY

5

HW

6

GND1

2

1

5

1

5V

BL

BR

PL

2

RE

3

HU

4

6

3

CN-C

LPFM

22 5V(LRE)

BL

BR

GY

24 LRE/

26 GND2(LRE)

1

2

3

LRE

1

2

6

BL

BR

GY

21 5V(LDD)

BL

PL

GY

23 LDD

25 GND2(LDD)

1

2

3

LDD

11

3

7

BL

PL

GY

CN-11

CN-12

CN-DT 12pin

CN-A

28 LCD/

PK

LB

BR

27 LDSW/

29 LLED

TRAY SW

PWB

8

9

10

GY

LB

BR

CN-13

3

2

1

3 LLM+

RD

PK

4 LLM-

4

5

RD

GY

PK

CN-14

1

2

3

12

GY

GY

LIFT

MOTO

7

5V

8

GND

2

3

DTR-LCC

9

24

V

10

GND

1

2

RXD-LCC

BL

GY

PK

RD

GY

PL

LB

BR

4

DSR-LCC

5

RES-LCC

CN-B

9 10

5 11 12

4 6 7

1

TXD-LCC

BR

8 3

1 2

WH

1 2

LHT

WH

CN-RL

CN-HT

WH

WH

G1

LCC

CONTROL

PWB

G8

G4

G3

CN-6

10 – 1

RXD-

TXD-

DSR-

DTR-

RES-

VCC

GND2

+24V

GND1

FG

24V

10V

8MHz

Xtal

CPU(H8/3294)

24V

10V

LLED

Copier

Communication

buff

e

r circuit

Power supply
monitoring unit

Power supply
10 V circuit

Operation unit

Large-capacity tray control PWB

Large-capacity tray

Lift motor drive
circuit

Solenoid drive
circuit

LED lighting circuit

Sensor input
circuit

Transfer motor
drive circuit

Upper limit sw (LLSW)

Lift motor (LLM)

Paper amount detection
sensor (LRE)

Paper feed clutch (LPFC)

Paper feed solenoid (LPFS)

Cassette detection line (LCD)

Transfer motor (LPFM)

Upper limit detection sensor (LUD)

Lower limit detection sensor (LDD)

Paper detection sensor (LPED)

Paper delivery detection sensor
(LPFD)

Copier connection sensor

Door open switch (LDSW)

10 – 2

On the communication buffer circuit, signals are input and output by the transistor array TD62504 (IC02).

The sensor signals used by LCC are connected directly to the input port of the IC02. LPFD is provided with a static electricity noise protective diode
which protects against static electricity from the paper transport section. The other sensors has the same circuit configuration as the LPED.

A limit switch is provided to protect the LCC If it fails to operate normally. If the tray exceeds the upper limit sensor (LUD) position, the switch is
turned on to shut off the power of the lift motor.

2

P51/RXD

6

P46/CLK

1

P50/TXD

3

P52/SCK

3

14

2

15

12

5

10

7

CPU(IC01)

4.7K x 2

4.7K x 4

IC02C

IC02B

IC02E

IC02G

TD62504F

TD62504F

TD62504F

TD62504F

1SS133 x 4

D04

D05

D09

D10

D01

D02

D07

D08

1SS133 x 4

+5V

TXD-LCC

DTR-LCC/

RXD-LCC/

DSR-LCC/

CN-B-1

CN-B-3

CN-B2

CN-B-4

+5V

D23

1SS133

R94
22K

R95
22K

BR04
4.7K

38 LPFD

R79

10K

P21/A9

LPFD

CN-A-17

CPU
(IC01)

37 LDD

R80

10K

P22/A10

LDD

CN-A-23

39 LPED

R78

10K

P20/A8

LPED

CN-A-12

D24

1SS133

C14

C15

C16

1000P x 3

24V

24V(LLSW)

LLM+

LLM-

Upper limit switch

Lift motor

LCC control PWB

Lift motor
drive circuit

Signal name

Logic

DSR-LCC

H: Request for communication

L: No request for communication

DTR-LCC

H: Communication allowed

L: Communication inhibited

TXD-LCC

H: Normal

L: Start bit

RXD-LCC

H: Normal

L: Start bit

11 – 1

The solenoids and clutches are driven by a Darlington transistor array TD62004AP with 7-circuit clamp diode. LPFS is turned on when the CPU’s
port output is at H. LPFC has the same circuit.

The tray height is adjusted according to the size of the paper mounted on the paper feed tray. The lift motor controls the rotational direction
(CW/CCW) with the control signals (LLMU, LLMD) from the CPU. The circuit forms a bridge circuit with STA457C to allow the CW/CCW control.

A fuse (F01) is provided to protect the motor against shorting or overload.

Suppose that both LLMD and LLMU become H level at the above circuit. If LLMU becomes H first, the STA457C pin 3 become H, IC04 pin 13
through IC07 pin 6 become H due to diode D20. Even if LLMU is at H and LLMD at H on the port, STA457C pin 1 is at L and pin 6 at H, thus no
conduction of STA457C is achieved.

The motor drive circuit is composed of IC05 motor ICs (IC12, IC04 and IC06). When the PWM signal output from the CPU made at H level, the
transistor inside the IC06 turns on to supply current to the motor to start the motor. As the motor is started, hole signals (Hu, Hv, Hw) inside the
motor switch the input of IC05, while the output switches the transistor inside IC06. The motor thus starts rotating under non-control state.

When the motor rotates, the speed signal (RE) is output from the motor. The signal is taken into the CPU. If the motor speed is slow, the RWM
signal On duty is increased to increase the speed; if the motor speed is high, the PWM signal On duty is decreased to maintain the required speed.

As the current flowing to the motor becomes large, the input voltage at the minus side of the IC09 rises. If the voltage exceeds the plus-side input
voltage, output voltage at IC09 becomes at L level, leading in the PWM signal to turn off the transistor of IC07 so that the current to the motor is cut
off. (setting: 3A).

+24V

CPU(IC01)

P10/A0

SOL

LPFS/

CN-A-8

10.5K

7.2K

3K

48  LPFS

9A12004B

D21

1SS133x2

R34 1K

R36 1K

IC07

STA457C

1

1

6

6

5

5

10

10

9 9

4 4

8 8

3 3

2

2

7

7

R38
10K

R39

10K

R40
3.9K

C31

0.1uF

CN-A-3

CN-A-4

R37 1K

D20

R35 1K

IC04D

ULN2004A

4

13

IC04C

ULN2004A

3

14

F01

LLM+

LLM-

+24V(LLSW)

LLMU

LLMD

(1/4W)

1-E4

1-E4

1.25A/120V
T1.0A/250V

IC09A

LM393

3

2

1

8

4

+

-

IC04E

ULN2004A

5

12

IC04F

ULN2004A

6

11

IC04G

ULN2004A

7

10

IC06

SLA6012

IA1

2

IB1

8

IC1

9

VCC

1

OA

3

OB

7

OC 10

GND

5

GND

12

IC2

11

IB2

6

IA2

4

C17

C19

C22 C23 C24

C26

0.1U

D17 D18 D19

R16

10K

R17

10K

R18

10K

R26
0.22

R28

200

C25
100U/35V

+

R20

2.2K

R21

2.2K

R22

2.2K

R23

680

R24

680

R25

680

CN-C-3

CN-C-4

CN-C-5

CN-C-7

CN-C-8

CN-C-9

C21

0.1U

R14

2.2K

R15

2.2K

IC05

UPC1246C

IN1

1

IN2

2

IN3

4

IN4

3

IN5

5

IN6

6

VCC

8

VREF

10

OUT1 11

OUT3

12

OUT5 13

OUT6 14

OUT4

15

OUT2 16

REVERSE

7

GND

9

R19

2.7K

D22
RD11EB

C18

C20

C29
0.1U

R32
1K(1/4W)

FR01
100(1/4W)

Q02
2SC1472K

C30
0.1U

CN-C-2

R29

360

R27

2.4K

C27

0.1U

C34

0.1U

R77

10K

IC12D

TD62504F

4

13

IC12A

TD62504F

1

16

IC12B

TD62504F

2

15

IC12C

TD62504F

3

14

R85
2.2K

R88

1.2K

R87

1.2K

R86

1.2K

R76

10K

D25
RD18FB1

R90
1K(1/4W)

BR15

2.2K X 3

2

3

4

BR07

1K x3

2

3

4

BR08

1K x3

4

3

2

U
V

W

RE/

HW

HV

HU

+10V

+24V

+5V

+10V

+24V

+10V

+10V

+5V

+5V

+24V

+5V

DIR

RE

PWM

0.1U X3

1000P X4

ISR124-400 X3

/1W

1-D2

1-D2

1-D2

Lift motor

CPU port

LLMD

LLMU

Forward rotation (UP)

L

H

Forward rotation (DOWN)

H

L

OFF

L

L

11 – 2