Ricoh HS2P PLUS Service Manual Download Page 2

Page: 2 / 20

RICOH

echnical

ulletin

PAGE: 2/2

Reissued: 23-Mar-00

Model:

IS450 / IS450DE/V

Date:

17-Feb-00

No.:

RG407001a

Differences in internal components:

HS2P

HS2P+

Page-

Index

Part number

Description

Part number

Description

17-14

G4074039

Platen Cover Sheet

G4134039

Platen Cover Sheet Black

9-4

G4073345

ADF Guide Plate

G4133347

ADF Guide Plate Black

11-17

G4083501

Rear Roller

G4133501

Rear Roller Black

23-6

G4085100

RCU Board

G4135101

ERCU Board

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G4135150

SIMM 8M X 32 BIT 60ns

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-----

G4133590

Shading Calibration Sheet

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-----

G4131056

SCSI I/F Cover

Summary of Contents for HS2P PLUS

Page 1: ...e to the HS2P from the HS2P General differences from the HS2P 1 In order to enable Auto Original Detection as well as Auto Skew Detection the color of the Platen Cover Sheet has been changed from whit...

Page 2: ...rt number Description Part number Description 17 14 G4074039 Platen Cover Sheet G4134039 Platen Cover Sheet Black 9 4 G4073345 ADF Guide Plate G4133347 ADF Guide Plate Black 11 17 G4083501 Rear Roller...

Page 3: ...HS2P PLUS Machine Code G413 Service Manual Issued on February 16 2000 Ricoh Co LTD...

Page 4: ...0 6 Scanning resolution Simplex mode Main scan 100 800 dpi in 1 dpi steps Sub scan 100 800 dpi in 1 dpi steps Duplex mode Main scan 100 600 dpi in 100 dpi steps Sub scan 100 600 dpi in 100 dpi steps G...

Page 5: ...5 x 26 7 x 10 9 1 1 2 ENDORSER Number of printable characters 19 characters max Character set 43 characters 0123456789 AB Z Character size 1 6 W x 2 8 H mm Character pitch 2 4 mm 20 Printable lines 1...

Page 6: ...the video signal during reverse side scanning 10 Video connector For connecting the video cable 11 SCSI ID rotary switch Used to select the SCSI ID and to select diagnostic tests Note that positions 8...

Page 7: ...al on the document table 10 Separation roller Stops the lower pages of the original while allowing the top one to pass 11 Black roller Feed the scanned original 12 Feed out rollers Feed the scanned or...

Page 8: ...vides ac power to the exposure lamp 4 SBU Contains the CCD and outputs a video signal to the SCU 5 Scanner Motor Drives the scanners 6 SOP This contains the scanner indicator lamps 7 PSU Provides dc v...

Page 9: ...the reverse side of the original 18 EDU Controls the mechanical parts of the endorser 19 Endorser solenoid Moves the paper holding plate to hold the original at the endorser s printing position 20 Rel...

Page 10: ...Processing Unit IC on the SCU does the image processing then the image data goes to the computer through the Memory Control IC and the SCSI controller The CIS Contact Image Sensor unit in the duplex...

Page 11: ...Auto shading 2 Magnification 3 Mirror processing 4 Filtering MTF and smoothing 5 gamma correction 6 Grayscale processing 7 Binary picture processing 8 Error diffusion 9 Dithering 10 White black conver...

Page 12: ...enlargement in the main scan direction are done by the IPU Mirror Processing A mirror image of the original must be made for output Filtering There are two software filters the MTF filter and the smoo...

Page 13: ...it and the surrounding pixels The corrected pixels are then compared with a matrix table Binary Picture Processing Each video signal level is converted from 8 bit to 1 bit black and white image data...

Page 14: ...it area scans the reverse side of the document The front side of the document is scanned first Then the document goes to the reverse side scanning area The black roller B pushes the document against t...

Page 15: ...oard The ERCU board contains the IPU and memory controller ICs for image processing The image processing in the IPU is the same as for the IPU in the SCU except for the shading correction After image...

Page 16: ...NCTIONS 2 8 1 BOARD STRUCTURE For the main function of each PCB refer to the Electrical Component Layout section H P Sensor Lamp Stabilizer Operation Panel Cooling Fan Scanner Motor SBU Exposure Lamp...

Page 17: ...the memory DRAM 32 Mbytes x 2 Address control when recalling the data from the memory SCSI controller SCSI interface controller SRAM Work area 32 kbytes EPROM Contains the program Enhanced I O EIO Ext...

Page 18: ...dip switches 5 to 8 Within each test mode tests are selected by turning the SCSI ID rotary switch and the machine s condition is indicated by the four LEDs on the covers Note the position of the SCSI...

Page 19: ...ation of four LEDs LEDs Error Items Power On Green Machine Busy Green Document in Place Green Error Red SCU error Blinking Blinking RCU error Blinking On Blinking Home position error Blinking Blinking...

Page 20: ...No On Off Blinking Off Stand by Scan wait mode Yes On Off Blinking Off No On On Off Off Scanning Normal mode Yes On On On Off ADF cover switch open On Off Off On Document jam On Off Blinking On Docum...

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