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9

1. System Configuration

The SPC PC Board controls all mechanical drivers for the Scanner and Printer.
The 16-bit CPU consist of Gate Array, F-ROM for Programming, SRAM for Work
and IPC PC Board for the Finisher Interface.

2. SC PC Board Interface

The Serial and Parallel Communication Ports used to interface the following devices.

•  Serial Interface

SPCRXD: Sends data to SC PCB
SPCTXD: Receives data from SC PCB
IICSDA: Sends and Receives data for Program Updating
IICSCL: Sends and Receives data clock for Program Updating

•  Parallel Interface for Scanner

pSENTIM: Main Scan Synchronous Signal
pVREQ: Sub Scan Synchronous Signal
nSREQ: Scan Enable Signal
nSACK: Request Shading Signal

•  Parallel Interface for Printer

nPRDY: Print Ready
nVRDY: Request Print Ready
nPACK: Ready for Paper Feed
nATT : Printer Status Signal
nDUPACK: Ready for Duplex Paper Feed 
nPVSYNC: Vertical Synchronous Signal
pPRNT: Print data
pBD_A: Line Synchronous data
pSPCRST: Reset Signal
nPRGDWN: Program Download Signal

CPU
IC2

M30802

GATE ARRAY

IC6

DZAC000293

FLASH ROM

IC3

LH28F400BVE

(512kB)

SRAM

IC4

LC35256

(32kB)

SRAM

IC5

LC35256

(32kB)

IPC BOARD

CNP725

A0~7
18,19

A0~19

D0~15

A1~18

A1~15

A1~15

D0~15

D0~15

D0~7

D8~15

D0~7

A0~7

nRD
nWRL
nWRH
nCS0
nCS1
nCS2

nCS3

nRD
nWRL
nWRH

nCS

nOE
nWE

nCE

nOE
nWE

nCE

nOE
nWE

nCE

nRD
nWR

nCS

10

3. Reset Circuit

This Circuit is controlled by the Reset of IC6 (PST575E) and nPRST Signal from the SC PCB.
If the 5 VDC Power Supply Voltage becomes lower than 3.9 VDC, this circuit generates a Reset Signal.
If the nRST signal from the SC PCB is Low, this Circuit also generates a Reset Signal.

IC9

PST575E

pSPCRST

IC2

M30802

R57

C62

R60

Q7

5V

3. 9V

td

td

td =12.5ms

+5V

11

4. Fuser Control Circuit

The DP-2310/3010 Fuser is controlled by two (2) Thermistors and two (2) Fuser Lamps. One 
Thermistor is located at the center. And the other at the edge to measure the temperature correctly.

CNP721

1

IC2

+

-

R

R

C

D

R

R

IC

CNP721

2

R

C

Q

Q

Q

R

R

R

CNP721

3

+

-

R

D

R

R

C

D

R

R

IC

CNP723

4

R

C

Q

Q

Q

R

R

R

D

D

IC5

CNP704

4

CNP704

6

CNP704

5

R

R

QA

QA

QA

QA

QA

QA

R

R

R

CNP704

7

R

R

R

R

C

R

Q

CNP704

1

2

CNP704

+24V

D

12

5. LSU Control Circuit

Consist of Laser and Polygon Motor Control Circuits.

IC6

GATE ARRAY

CNP701

pSH_A

pLDEN

nHSYNC

BDCNT

IC1
CPU

DA1

+

-

SPC

LSU

Laser Control

L+5V

+24VHL

IC8

L+5V

R

R

Q

Q

R

R

R

IC

C

C

C

R

R

R

Q

R

R

R

D

3

5

4

6

8

1

2

IC6

GATE ARRAY

IC2

CPU

pPMCNT

pPMRDY

nPMCLK

+5V

R

R

Q

Q

CN701

LSU

+24VHL

13

12

10

11

9

PM

Polygon

Motor