DOWNLOAD Panasonic DP-8020E / 8020P* / 8016P (serv.man2) Service Manual ↓ Size: 8.37 MB | Pages: 126 in PDF or view online for FREE

9

DEC 2006

Ver. 1.0

DP-8020E/8020P*/8016P

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 and SRAM for Work area.

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

DZAL000349

FLASH ROM

IC3

MX29F400BTC

(512kB)

SRAM

IC4

LC35256

(32kB)

SRAM

IC5

LC35256

(32kB)

A0~7
18,19

A0~19

D0~15

A1~18

A1~15

A1~15

D0~15

D0~15

D0~7

D8~15

nRD
nWRL
nWRH
nCS0
nCS1
nCS2

nCS3

nRD
nWRL
nWRH

nCS

nOE
nWE

nCE

nOE
nWE

nCE

nOE
nWE

nCE

10

DEC 2006

Ver. 1.0

DP-8020E/8020P*/8016P

3. Reset Circuit

This Circuit is controlled by the Reset of IC9 (PST575E) and pSPCRST Signal from the SC PCB.
If the 5 VDC Power Supply Voltage drops below 3.9 VDC, this circuit generates a Reset Signal. If the 
pSPCRST 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

DEC 2006

Ver. 1.0

DP-8020E/8020P*/8016P

4. Fuser Control Circuit

The DP-8020E/8020P*/8016P Fuser is controlled by the Thermistor and the Fuser Lamp.

CN721

1

IC2

+

-

R

R

C

D

R

R

IC

CN721

2

R

C

Q

Q

Q

R

R

R

D

IC5

CN704

4

R

QA

QA

R

CN702

19

R

R

R

R

C

R

Q

CN702

21

22

CN702

+24V

D

12

DEC 2006

Ver. 1.0

DP-8020E/8020P*/8016P

5. LSU Control Circuit

Consist of Laser and Polygon Motor Control Circuits.

IC6

GATE ARRAY

CN701

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