Ricoh FAX2700L SPECIFICATIONS fx2700

FX6

RICOH FAX2700L

SERVICE MANUAL

May 29th, 1995 Subject to change

WARNING

THIS MACHINE CONTAINS A LASER BEAM GENERATOR. LASER BEAMS CAN CAUSE PERMANENT EYE DAMAGE. DO NOT OPEN THE LASERUNIT OR LOOK ALONG THE LASER BEAM PATH WHILE THE MAIN POWER IS ON.

Lithium Batteries (Memory Back-up)

CAUTION

The danger of explosion exists if a battery of this type is incorr ec tly replaced. Replace only with the same or an equival ent type recommended by the manufacturer. Discard used batteries in accordance with the manufactur er’s instructions.

May 29th, 1995 OVERALL MACHINE INFORMATION

SPECIFICATIONS

1. OVERALL MACHINE INFORMATION

1.1. SPECIFICATIONS

Type

Desktop type transceiver

Circuit

PSTN, PABX

Connection

Direct couple

Document Size Length:

105 - 420 mm [4.1 - 16.5 ins] Up to 1.2 m [47.2 ins], manually assisted Up to 14 m [46 ft] after adjustment Width: 148 - 304 mm [5.8 - 12.0 ins]

Thickness:

0.05 to 0.2 mm [2 to 8 mils] (equivalent to 50 - 80 g/m

Document Feed

Automatic feed, face down

ADF Capacity

30 sheets (using 20 lb or 80 g/m

Scanning Method

Contact image sensor

Maximum Scan Width

216 mm [8.5 ins] ± 0.25%

Scan Resolutions Main scan: 8 dots/mm [203 dpi] Sub scan:

Standard - 3.85 lines/mm [98 lpi] Detail - 7.7 lines/mm [196 lpi] Fine - 15.4 lines/mm [392 lpi]

Memory Capacity ECM: 64 or 128 kbytes

(depends on the amount of image data) SAF: 244 kbytes (19 pages/Slerexe letter), extra 2 Mbyte (186 pages) or 4 Mbyte (350 pages) memory card available

Compression

MH, MR, EFC, MMR, SSC (MMR only with ECM) SAF storage for memory tx: MMR and raw data

)

paper)

Protocol

Group 3 with ECM

Modulation

V.29 (QAM), V.27ter (PHM), V.21 (FM)

Data Rate (bps)

9600/7200/4800/2400, Automatic fallback

I/O Rate

With ECM: 0 ms/line Without ECM: 2.5, 5, 10, 20, or 40 ms/line

Transmission Time

9 s at 9600 bps; Measured with G3 ECM using memory for a ITU-T #1 test document (Slerexe letter) at standard resolution

Printing System

Laser printing, plain paper, dry toner

Paper Size and Capacity Standard Cassette: 250 sheets

USA: Letter Europe: A4, A5 sideways Asia: A4, A5 sideways, F, F4 100 Sheet Cassette (Optional): 100 sheets USA: Letter, Legal Europe: A4, A5 sideways Asia: A4, A5 sideways, F, F4 Universal Cassette (Optional): 250 sheets Letter , Legal, A4, A5 sideways, F, F4

Maximum Printing Width

208 mm [8.1 ins]

Print Resolutions Fax and Copy Mode:

Main scan: 16 dots per mm [406 dpi] Sub scan: 15.4 lines/mm [392 lpi]

Printer Mode: 300 x 300 dpi Power Supply

USA: 115 ± 20 Vac, 60 ± 1 Hz Europe/Asia: 187 - 276 Vac, 50 ± 3 Hz

Power Consumption (Base Machine Only) Standby: Minimum 2 W; Normal 20 W Transmit: 25 W Receive: 210 W Copying: 270 W

Operating Environment Temperature: 17 - 28 °C [63 - 82 °F] Humidity: 40 - 70 %Rh

1-1

OVERALL MACHINE INFORMATION May 29th, 1995 SPECIFICATIONS

Dimensions (W x D x H)

475 x 459 x 240 mm [18.7 x 18.1 x 9.4 ins] Excluding handset, trays, and optional units

Weight

Approx. 17 kg [37 lbs] Excluding CTM, handset, trays, and optional units

1-2

May 29th, 1995 OVERALL MACHINE INFORMATION

FEATURES

1.2. FEATURES

KEY: O = Used, X = Not Used, A = With optional memory only, B = With optional 100 sheet cassette only C = With optional counter only D = With optional handset only E = PIF

Equipment

ADF O Book scan X Built-in handset X Bypass feed: 1 sheet O Optional cassette: 100 sheets B Optional cassette: Universal O Cabinet X Counter C Cutter X Handset D Hard disk X Manual feed mechanism X Marker (Stamp) O Monitor speaker O Optional printer interface E

Video Processing Features

Contrast O Halftone (Basic & Error Diffusion) O MTF O Reduction X Resolution O Smoothing to 16 x 15.4 l/mm O

Communication Features - Auto

Automatic fallback O Automatic redialing O Confidential reception A Dual Access O Substitute reception O

Communication Features -

User Selectable

Action as a transfer broadcaster X AI Redial (last ten numbers) X Answering machine interface X Authorized Reception O Auto-answer delay time X

Communication Features -

User Selectable

Auto dialing (pulse or DTMF) O Auto Document O Auto image density selection X Auto paper size selection X Automatic Voice Message X Batch Transmission (max 6 files) A Broadcasting O Chain Dialing O Communication Result Display X Confidential ID Override O Confidential Transmission O Direct Fax Number Entry O Economy Transmission X Fax on demand X Forwarding A Free Polling O Groups (7 groups) O Group Transfer Station X Hold X ID Transmission O Immediate Redialing O Immediate transmission O Keystroke Programs O Memory transmission O Multi-step Transfer X Next Transfer Station X OMR X On Hook Dial O Ordering Toner X Page Count O Personal Codes O Personal Codes with Conf. ID A Polling Reception O Polling Transmission O Polling tx file lifetime in the SAF O Quick Dial (32 stations) O Reception modes (Fax, Tel, Length Reduction X Remote control features X Remote Transfer X Restricted Access O Secured Polling O Secured Polling with Stored ID

Override Secure Transmission X

Auto) O

1-3

OVERALL MACHINE INFORMATION May 29th, 1995 FEATURES

Communication Features -

User Selectable

Send Later O Silent ringing detection X Specified Image Area X Speed Dial (90 stations) O Super Fine Resolution

(16 x15.4 l/mm : 400 x 400 dpi) Telephone Directory X Tonal Signal Transmission O Transfer Request O Transmission Deadline (TRD) A Turnaround Polling X Two- step Transfer X Two in one X Voice Request (immed. tx only) X

Communication Features -

Service Selectable

AI Short Protocol O Auto-reduction override option O Busy tone detection O Closed Network (tx and rx) O Continuous Polling Reception X Dedicated tx parameters O ECM O EFC O Inch-mm conversion X Page retransmission times O Page separation mark O Protection against wrong conn. O Resol’n stepdown override option X Short Preamble X Well log O

Other User Features

Area code prefix X Automatic service call Service Center mark O Checkered mark X Clearing a memory file O Clearing a polling file O Clock O Confidential ID A Copy editing (Erase

Center/Margin) Copy mode O

Other User Features

Copy Mode Restriction X Counters O Daylight Saving Time O Destination Check X Direct entry of names O File Retention Time X File Retransmission X Function Programs O ID Code O Label Insertion ("From xxx") O Language Selection O LCD contrast control Service Memory Lock A Memory Lock ID A Modifying a memory file X Multi Sort Document Reception A Multicopy mode O Own telephone number O Power Saver (Night Timer and

standby mode) Print density control O Printing a memory file O RDS on/off O Reception Mode Switching Timer X Reception time printing X Reduction/Enlargement X Remaining memory indicator O Remote ID X Reverse Order Printing A RTI, TTI, CSI O Secure ID X Service Report Transmission O Speaker volume control O Specified Cassette Selection B Substitute reception on/off O Telephone line type O Toner Saving Mode O TTI on/off O User Function Keys X User Parameters O Wild Cards O

1-4

May 29th, 1995 OVERALL MACHINE INFORMATION

FEATURES

Reports - Automat ic

Charge Control Report X Communication Failure Report O Confidential File Report A Error Report O Memory Storage Report O Mode Change Report X Polling Clear Report O Polling Reserve Report O Polling Result Report O Power Failure Report O TCR (Journal) O Toner Cassette Order Form X Transfer Result Report X Transmission Result Report O

Reports - User-initiated

Authorized Reception List O Charge Control Report X File List O Forwarding List A Group List O Personal Code List O Program List O Quick Dial List O Specified Cassette Selection List B Speed Dial List O TCR O Transmission Status Report X User Function List X User Parameter List O

Service Mode Features

File Transfer O LCD contrast adjustment O Line error mark O Memory file printout (all files) O Modem test O NCU parameters O Operation panel test O Periodic service call O PM Call O Printer mechanism test O Printer test patterns O Programmable attenuation X Protocol dump list O RAM display/rewrite O RAM dump O RAM test O Ringer test X Scanner lamp test O Scanner mechanism test O Sensor initialization X Serial number O Service monitor report O Service station number O Software upload/download O SRAM data download O System parameter list O Technical data on the TCR O Thermal head parameters X Transmission Status Report X User data transfer O

Service Mode Features

Auto Paper Select test X Back-to-back test O Bit switch programming O Book mode test X Buzzer test O Cable equalizer O Comm. parameter display O Counter check O Country code O DTMF tone test O Echo countermeasure O Effective term of service calls O Error code display O Excessive jam alarm O

Memory Files

Max. number of files: 100 Max. number of stations/ file : 13 2 Max. number of stations ove rall: 300

1-5

OVERALL MACHINE INFORMATION May 29th, 1995 COMPONENT LAYOUT

1.3. COMPONENT LAYOUT

1.3.1. Mechanical Components

18 19

1014

No. Name Description

R2 Roller Feeds the document through the scanner.

R1 Roller Feeds the document through the scanner.

Document Feed Roller Feeds the document into the scanner.

Separation Pad Allows one page into the scanner.

Pick-up Roller Picks up pages of the document from the document

Pressure Plate This applies pressure against the pick-up roller.

CTM (Cleaning Toner

Magazine) Used Toner Tank This removes and stores excess toner from the master

table one at a time.

This consists of the toner cartridge, cleaning unit, used toner tank, charge corona unit, and quenching lamp.

after image transfer. It is part of the CTM.

H516V501.wmf

1-6

May 29th, 1995 OVERALL MACHINE INFORMATION

COMPONENT LAYOUT

No. Name Description

Charge Corona Unit This applies a charge to the drum at the start of the

Quenching Lamp This removes excess charge from the master at the

Cleaning Blade This wipes toner off the OPC drum.

Used Toner Collection

Roller Hot Roller Heat from this roller fuses the toner to the copy paper.

Cleaning Pad This cleans up and spreads silicone oil on the surface

Hot Roller Strippers These take the paper off the hot roller after fusing.

Paper Feed-out Rollers These feed the paper out of the printer.

Fusing Pressure Roller This applies pressure to the paper during the fusing

OPC Drum The latent image is written to this Organic

Development Unit This consists of the development roller, toner

Transfer Roller This applies a charge to the paper to pull the toner off

Development Roller This roller applies toner to the latent image on the drum.

Toner Application Roller This roller transfers toner to the development roller.

Toner Supply Bar This stirs up and transfers toner to the toner application

Paper Feed Rollers (100 Sheet Cassette)

Paper Feed Pressure

Rollers Registration Roller This carries out the registration process.

Paper Feed Rollers These pick up the top sheet of paper from the stack in

Toner Supply Roller This supplies toner to the development unit. It is part of

Toner Agitator This stirs up toner in the toner tank, so that it does not

Toner Tank This supplies toner to the development unit. It is part of

Laser Unit This consists of the LDDR (Laser Diode Driver),

print cycle. It is part of the CTM.

end of the print cycle. It is part of the CTM.

This catches the used toner and the transfers the toner to the used toner tank. It is part of the CTM.

of the hot roller.

process.

Photoconductor Drum.

application roller, toner supply bar, and transfer roller.

the drum and onto the copy paper.

roller. These pick up the top sheet of paper from the stack in

the optional 100 sheet cassette and feed it into the printer.

These feed paper from the cassette or bypass feed slot into the printer.

the cassette and feed it into the printer.

the toner tank.

collect into lumps.

the CTM.

Focusing lens, Fθ Lenses, Hexagonal mirror motor, and other laser optic components.

1-7

3 22

OVERALL MACHINE INFORMATION May 29th, 1995 COMPONENT LAYOUT

1.3.2. Drive Components

No. Name Description

Tx Motor This stepper motor drives the scanner.

R1/R2 Rollers These feed the document through the scanner.

Document Feed Drive

Gear Document Feed Roller

Drive Gear Pick-up Roller Drive Gear This drives the pick-up roller.

Drum Drive Gear This drives the drum.

Used Toner Collection

Roller Drive Gear Transfer Roller Drive Gear This drives the transfer roller.

Hot Roller Drive Gear This drives the hot roller.

Fusing Pressure Roller

Drive Gear

This drives the document feed and pick-up rollers.

This drives the document feed roller.

This drives the used toner collection roller (magnetic) in the used toner tank.

This drives the pressure roller in the fusing unit.

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H516V502.wmf

May 29th, 1995 OVERALL MACHINE INFORMATION

COMPONENT LAYOUT

No. Name Description

Paper Feed-out Roller This feeds printouts out of the machine.

Development Roller Drive

Gear Toner Application Roller

Drive Gear Paper Feed Roller Drive

Gear (100 Sheet Cassette) Registration Roller Drive

Gear Paper Feed Motor This stepper motor drives the paper feed mechanisms

Paper Feed Roller Drive

Gear Box Paper Feed Roller Drive

Gear Main Motor This brushless dc motor drives the drum, fusing unit,

Toner Supply Gear This ensures the supply of toner from the toner tank in

Toner Agitator Drive Gear This drives the toner agitator.

CTM Drive Gear This drives the CTM.

This drives the development roller.

This drives the toner application roller.

This drives the paper feed roller in the optional 100 sheet cassette.

This drives the registration roller.

and the registration roller. The gears in this box drive the paper feed roller in the

main cassette. This drives the paper feed roller.

development unit, and CTM.

the CTM, and its distribution across the full length of the development unit.

1-9

OVERALL MACHINE INFORMATION May 29th, 1995 COMPONENT LAYOUT

1.3.3. Electrical Components

H516V503.wmf

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May 29th, 1995 OVERALL MACHINE INFORMATION

COMPONENT LAYOUT

1. PCBs No. Name Description

FDU (Facsimile Driver Unit)

FCE (Facsimile Control

Engine) NCU (Network Control

Unit) OPU (Operation Panel

Unit) PSU (Power Supply Unit) This board supplies power to the machine, and

LDDR (Laser Diode

Driver) Power Pack This supplies high voltages to the corona wire, transfer

Contact Image Sensor Assembly

This board contains drivers for the motors, a dc-dc converter, the energy saving mode cpu, and other drive electronics.

This board controls the machine. It contains the main cpu, flash ROM, system RAM, and so on.

This board contains a relay and switches for interfacing the machine to the network and the handset.

This board controls the operation panel.

switches the fusing lamp on/off. This board drives the laser diode.

roller, and development rollers. This sensor reads and converts the light reflected from

the document into an analog video signal. It uses an RLA (Rod Lens Arr ay) sens or unit. An LED array which illuminates the document is contained in this unit.

2. Motors No. Name Description

Tx Motor This stepper motor drives the scanner.

Main Motor This brushless dc motor drives the drum, fusing unit,

Paper Feed Motor This stepper motor drives the registration roller and the

Hexagonal Mirror Motor This high-speed dc motor drives the hexagonal mirror

Ozone Fan Motor This removes ozone-laden air from the vicinity of the

Cooling Fan Motor This cools the interior of the machine.

development unit, and CTM.

paper feed mechanisms in the cassettes.

in the laser printer optics.

drum, and filters out the ozone.

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OVERALL MACHINE INFORMATION May 29th, 1995 COMPONENT LAYOUT

H516V504.wmf

3. Sensors No. Name Description

Document Sensor This detects the presence of a document in the feeder.

Scan Line Sensor This detects when a page is approaching the auto

Toner End Sensor This detects when the toner has run out.

Paper Size Detector This detects the paper size installed in the cassette.

Paper End Sensor This detects when the paper in the cassette has run out.

Registration Sensor This detects when paper has reached the registration

Fusing Exit Sensor This detects when the paper has been fed out of the

Fusing Exit Cover Switch This detects whether the fusing exit cover is open or

Bypass Feed Sensor This detects when a sheet of paper has been inserted

shading position.

The user must install the correct size indicator.

roller.

printer.

closed.

into the bypass feed slot. Then the registration roller feeds the paper a short distance into the machine to prepare for printing, and stops.

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May 29th, 1995 OVERALL MACHINE INFORMATION

COMPONENT LAYOUT

4. Interlock Switches No. Name Description

Interlock Switches If the fusing unit cover and/or top cover are open, these

interlock switches interrupt the +5VLD power supply for the laser diode and the +24VD power supply for the power pack, motors, and other components.

5. Others No. Name Description

Stamper Ass’y This stamps a red circle on each page that is

Quenching Lamp This removes excess charge from the drum at the end

Charge Corona Unit This applies a charge to the drum at the start of the

Thermostat This interrupts the ac power supply to the fusing lamp if

Thermistor This monitors the temperature at the hot roller surface.

Fusing Lamp The heat from this lamp fuses the toner to the paper.

Monitor Speaker This allows the user to listen to the condition of the

Zener Diode This ensures that the charge given to the drum by the

Ozone Filter This removes ozone-laden air from the vicinity of the

successfully fed through the scanner.

of the print cycle. This is a part of CTM.

print cycle. This is a part of CTM.

the temperature of the thermostat surface exceeds 400°C.

telephone line.

charge corona wire does not exceed -750 volts.

drum.

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OVERALL MACHINE INFORMATION May 29th, 1995 COMPONENT LAYOUT

6. Optional Equipment

No. Name Description

Counter This counts the number of prints.

Printer Interface This allows the machine to be connected to a computer

RS232C Interface Board* This allows the machine to be connected to a computer

IC Card This increases the SAF memory capacity. Either a 2

100 Sheet Cassette This increases the paper capacity of the machine, and

Paper Size Detector (100

Sheet Cassette) Paper End Sensor (100

Sheet Cassette) Paper Feed Clutch (100

Sheet Cassette)

as a laser printer.

as an external fax device, for example.

MB or 4 MB card can be used.

allows the machine to have more than one paper size available at the same time.

This detects the paper size installed in the cassette.

This detects when the paper in the cassette has run out.

This transfers drive from the paper feed motor to the paper feed roller in the cassette.

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* This option may not be available in some countries.

1-14

May 29th, 1995 OVERALL MACHINE INFORMATION

OVERALL MACHINE CONTROL

1.4. OVERALL MACHINE CONTROL

Optional

100 Sheet

Cassette

Optional

Printer I/F

PSU

Fusing

Lamp

Optional

IC Card

FDU

Energy

Saver CPU

DC-DC

Converter

Handset

FCE

MDM

FCIP

Hybrid IC

(HIC)

SpeakerNCU

Working

RAM

Control Signals

CPU RU8

Power

Pack

DRAM

ECM/SAF

Memory

Page

Memory

DATA/ADDRESS BUS

DMAC DCR DIP LIF

External I/O (EXIO)

Driver

Optional Counter

Scanner

and

printer

components

and

sensors

System

ROM

(Flash)

Operation

Panel

System

RAM

(SRAM)

Drivers

(FPD)

Optional

RS232C I/F

Sensors

PRIF

Video

SRAM

Amplifier

LDDR

Thermistor

Contact

Image

Sensor

and

paper

feed

motors

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The FCE (Facsimile Control Engine) contains the FCIP (Facsimile Control and Image Processor), DRAM, SRAM, System ROM, and video processing memory, and controls the entire system through the FDU (Facsimile Driver Unit).

There are two cpus in the mach ine : the main cpu (FCIP) on the FCE and th e energy saver cpu on the FDU. In energy saver mod e, the main CPU switches off and the energy saver CPU takes over.

The FCIP consist s of th e following component blocks:

• MDM - Modem• RU8 CPU - Main CPU

• DMAC - DMA Controlle r• LIF- Laser Interface

• DIP - Digital Image Processor• PRIF - Printer Interface

• DCR - Data Compression and Reconstruction

The 1 MB DRAM contains the SAF memory, ECM buffer memory, work area, and page memory. The SAF memory can be extended by 2 or 4 Mbytes with an IC card.

A 512 KB (4 Mbit) flash ROM is used for the system ROM. Software in this ROM can be rewritten from the IC card slot or by RDS.

1-15

OVERALL MACHINE INFORMATION May 29th, 1995 VIDEO DATA PATH

1.5. VIDEO DATA PATH

1.5.1. Transmission

Original

Contact Image Sensor

Assembly

LED Array

Image Sensor

FDU

Amplifier

FCE

DCR

ECM/

SAF

Memory

DIP

FCIP

MDM

Amplifier

Attenuator

HIC

NCU

Video

Processing

Memory

DRAM

SAF IC

Card

DIP: Digital Image Processor

Line Buffer /FIFO

Memory

DATA/ADDRESS BUS

DCR: Data Compression & Reconstruction MDM: Modem

To the network

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Immediate Transmission:

Scanned data form the contact imag e sen sor pa sses to the DI P block in the FCIP. Afte r an alo g/digital video processing, the DCR block compresse s t he data for transmission. The compressed data then passe s either to the FIFO memory or to the ECM memory, before it is sent to the telephone line through the modem.

Memory Transmission:

First, the scanned data is sto red in the SAF memory after compression in the DCR block. At the time for transmission, the DCR block decompre sses th e data from the SAF memory, then compresses it again after handshakin g with the other te rminal is done. The compressed data the n passes eit he r to the FIFO memory or to the ECM memory, before it is sent to the telephone line through th e modem.

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May 29th, 1995 OVERALL MACHINE INFORMATION

VIDEO DATA PATH

1.5.2. Reception

From the Network

LIF: Laser Interface DCR: Data Compression & Reconstruction

NCU

MDM: Modem

FDU

HIC

FCE

Amplifier

MDM

FCIP

LIF

DATA/ADDRESS BUS

ECM/SAF

Memory

Page

Memory

LDDR

Copy Paper

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DRAM

DCR

Line Buffer

/FIFO

Memory

Data from the line p asse s to the modem throu gh th e NCU a nd hyb rid IC. After the modem demod ula tes the data, the decompre ssed dat a pa sses to the DCR block, through either the FIFO or the ECM memory, where the data is decompressed to rast er image data. At the same time , t he compressed data passes to the SAF memory as a backup in case of mechanical problems during printing (substit ute reception).

The raster image data is the n passe d to the page memory for printing. After a page of data has been stored in the page memory, the data is sent to the LDDR through the LIF block.

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OVERALL MACHINE INFORMATION May 29th, 1995 VIDEO DATA PATH

1.5.3. Copying

Original

Contact Image Sensor Assembly

Image Sensor

LED Array

FDU

Amplifier

FCE

LDDR

DRAM

Video

Processing

Memory

Line Buffer

/FIFO

Memory

DCR

DATA/ADDRESS BUS

ECM/SAF

Memory

DIP

FCIP

Page

Memory

LIF

SAF Memory IC Card

LIF: Laser Interface DCR: Data Compression & Reconstruction DIP: Digital Image Processor

Copy Paper

H516V509.wmf

Single copy

The scanned data passe s to th e pa ge me mory af ter video processing in the DIP block. After a page of data ha s be en stored in the page memo ry, the data is sent to the LDDR through the LIF block.

Multi-page copy

The scanned data passe s to th e SAF memory after video processing (DIP) and compression (DCR). After a pa ge of data has been stored in t he SA F memory, the data passes to the DCR block again for de comp ression, then it passes to the page memory for print ing .

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May 29th, 1995 OVERALL MACHINE INFORMATION

VIDEO DATA PATH

1.5.4. Printing from the Optional Printer Inter fac e

Optional Printer

Interface

FDU

FCE

PRIF

FCIP

LIF

LDDR

LIF: Laser Interface PRIF: Printer Interface

Copy

Paper

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The page memory inside the printer inte rfa ce is used to hold the print data. After a page of data has been stored in the printer interface’s page memory,

the data is sent to the LIF through the PRIF (Printer Interfa ce) blo ck.

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OVERALL MACHINE INFORMATION May 29th, 1995 POWER DISTRIBUTION

1.6. POWER DISTRI BUTI O N

1.6.1. Distribution Diagram

AC Switching

Circuit

Fusing Lamp

ON/OFF

Circuit

AC115V or 230V

Fusing

Lamp

Main

Power

Main Switch

PSU

24VIN

Card

+24VM

+24VD

Optional Counter

+12VP

+24V

+5V

+5VD

+12VD

+5VD

+5V

+24VD

FCE

DC-DC

Converter

DC-DC

Converter

Fusing Unit

Interlock Switches

-5V

Optional 100

+5VBAT

Sheet

Cassette

12VP

+5V

+5VE

+5vv

+5VLD

+24VM +5V

LDDR

+5VLD

Printer

I/F

+5VD

DC-DC

Converter

+24V

+5VE

NCU

+24V +5V

RS232C

I/F

+5V

FDU

+24VM

+5V

+5VV

-5V

Image Sensor

+24VM

LED Array

+24VM

+24VD

+5V

+5VE

Motors

Feed Clutch

Stamp

Cooling Fan

Ozone Fan

Power Pack

Thermistor

Printer Sensors

Operation Panel

+5VE

Scanner Sensors

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The PSU supplies +24V dc power to the FDU. The FDU co nve rts t he +24 V dc power supply to the following supplie s.

+5V

+5VE

+5VLD

+5VV

+5VD

+5VBAT

+24V

+24VD

+24VIN

+24VM

-5V

+12VP

This is normally on when the main switch is on. This is used for watching for an activation signal from the NCU, document

feeder, or operation panel when the machine is in energy saving mode. This supplies the laser diode. It is interrupted if the fusing unit cover interlock

switch opens. This is a more stable power supply than +5V. It is used for the Contact Image

Sensor. This supplies the DRAM and the optional IC card on the FCE to back up the

stored data for one hour, if the power is switched off and some data is stored in them. A rechargeable battery on the FDU is used to generate +5VD.

This supplies the system RAM on the FCE to back up the programmed data, if the power is switched off. A lithium battery is used to generate +5VBAT.

This is normally on when the main switch is on. This is interrupted if the fusing unit cover interlock switch opens. This supplies +24V to the fusing unit on/off switching circuit. It is interrupted if

the fusing unit cover interlock switch opens. This is interrupted if the machine enters energy saving mode. This is used for the image sensor. This is supplied to the Flash ROMs on teh FCE and the optional IC card.

1-20

May 29th, 1995 OVERALL MACHINE INFORMATION

POWER DISTRIBUTION

1.6.2. Memory Back-up Circuit

[A]

[B]

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The +5VBAT supply from the lithium bat te ry [ A] backs up the syst em RAM which contains system para met ers an d pro gra mmed telephone numbers, and the real time clock in the main cpu. The 5RTCCS signal tells the main cpu whether the back-up powe r (+5VBAT) is coming from the battery or from the +5V power supply.

A rechargeable lithium batt ery [B] and the dc/dc converter on the FDU back up the DRAM (SAF memory) for one hour, if there is data in the SAF memory and the power is switched off. While the main power is on, the +5 VE supply recharges the battery. The battery recharges in o ne or t wo d ays.

The battery [B] generates ab ou t 3 volt s (max. 3. 2 vo lts). The dc/dc converter (IC12) lifts this voltage to 5 volt s so it can be used as the +5 VD sup ply fo r SAF backup. The CPU monit ors th e voltage of the +5VD sup ply wit h t he 1VDET signal. Whe n th e ba tt ery ha s run do wn, and the volta ge is lower tha n

4.4 volts, the CPU stops the dc/dc converter by dropping 1SAFFG to low and the machine stops backing up th e memory.

There is no battery switch for the battery [B].

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H516D503.wmf

May 29th, 1995 DETAILED SECTION DESCRIPTIONS

SCANNER

2. DETAILED SECTION DESCRIPTIONS

2.1. SCANNER

2.1.1. Mechanisms

1. Document Detection

[A]

[B]

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The document se nso r [A] detects when a do cument is placed in the ADF. The fold-down extension [B] help s to sup port longer documents.

2. Pick-up and Separation

[D]

[A]

[B]

[C]

Plate [A] aligns th e leading edges of the pa ge s of the document. When the machine starts feeding the docu men t, the mecha nical clutch mechanism in the ADF roller unit lifts up the pick-up roller [B ] t o f eed the bott om sheet of the document. Then, the feed roller [C] feeds the sheet into the sca nner. The separation rubbe r plate [D] prevents the feed roller from fe ed ing mo re than one sheet at a time.

Cross reference ADF mechanical clutch mechanism: Group 3 Facsimile Manual, page 2-2-8

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[D]

[E]

DETAILED SECTION DESCRIPTIONS May 29th, 1995 SCANNER

3. Drive Mechanism

[C]

[B]

[A]

H516D502.wmf

The tx motor [A] drives the pick-up roller [B], feed roller [C], R1 roller [D], an d R2 roller [E].

The scanning speed fo r each resolution mode is as follows.

Resolution Scan speed (/A4)

Standard - Storage to SAF (Memory Tx or Multi-copy mode) Standard - Immediate Tx or Single copy mode Detail Fine

2.83 s

5.65 s

11.30 s

The scanner can feed pap er up to 304 mm (1 2. 0" ) wid e, howe ver the actual scan width is 216 mm (8.5").

The maximum acceptable document page length can be adju ste d to 0.6 m (23.6"), 1.2 m (47.2"), or 14 m (46 ft). The default setting is 1.2 m.

Cross reference

Maximum document length: Scanner Switch 00, bits 2 and 3.

2-2

[C]

[G]

[D]

May 29th, 1995 DETAILED SECTION DESCRIPTIONS

SCANNER

4. Image Scanning

[A]

[B]

[F]

[E]

H516D544.wmf

The scanner consists of a sha din g plate [A] and a contact ima ge senso r (CIS) assembly [B]. Insid e the CIS are an exposure glass [C], a rod lens array [D], an image sensor [E], and an LED array [F] .

The image sensor consists of a row of 1728 photo sen sitive elements (Letter width x 8 dots/mm). Light from the LED array is reflected fro m the docu men t and focused onto the image sensor by the rod lens array. Because of the short optical path inside the CIS, the focal depth is much shorter than for a CCD type scanner. Because of this, the spring [G] pushes the shading plate [A] so that the docume nt surface always touches the expo sure glass at the scan line.

The image sensor assembly is adju sted at the factory, so it does not need any adjustment at replacement in the field.

The image sensor scans the origin al on e line at a time , an d ou tputs an analog signal for each line. The voltage from each element depends on the intensity of the light reflect ed from th e orig ina l ont o the ele ment; the intensity of the light depends on th e da rkness of the area of the docu men t it was reflected from.

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[A]

DETAILED SECTION DESCRIPTIONS May 29th, 1995 SCANNER

5. Sub Scan Resolution Conversion

Standard: The machine fe eds t he docu men t in 7.7 line/mm steps, an d sca ns

it in accordance with the set ting of scanner bit switch 00, bit 4. A scanning resolution of 3.85 lines/mm means that the machin e scans once every two motor steps.

Scanner bit switch 00

Bit 4 = 0 Bit 4 = 1

Scan - 7.7 l/mm

Tx/Copy - 3.85 l/mm

(OR processed)

OR processing is always

disabled.

Immediate tx/ Copying

Scanning to memory

Scan - 3.85 l/mm

Tx/Copy - 3.85 l/mm

Scan - 3.85 l/mm

Tx/Copy - 3.85 l/mm

Detail: The machin e fe ed s and scans the document in 7.7 line/ mm st eps. The scanned lines are tra nsmit ted without any conversion.

Fine: The machine feeds and scans the document in 15.4 lin e/ mm st eps. The scanned lines are transmit te d without any conversion. In memory tra nsmission, if the other terminal cannot receive a message at Fine resolution, alternate lines (even-numbered lines) are deleted before transmission.

6. Stamping

FDU

FCE

FCIP EXIO

+24VD

CN18-6

CN18-5

Stamp

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The original always stops at the stamping position after the page was transmitted (immediate transmission) or stored (memory transmission) successfully. If the Stamp LED is turn ed on, the cp u dro ps the voltage at CN18-5 for 50 0 ms to activate the stampe r sole no id [A]. Then the original is fed o ut of the scanner. If the Stamp LED is turn ed off, the machine fee ds ou t th e original without stamping.

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May 29th, 1995 DETAILED SECTION DESCRIPTIONS

SCANNER

2.1.2. Scanner Timing Chart

1. Timing Chart

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The following describes what is happening at points 1 to 6 on the timing chart .

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DETAILED SECTION DESCRIPTIONS May 29th, 1995 SCANNER

1. When the Start key is pressed, the tx moto r f ee ds th e original to the scan line sensor.

2. The tx motor stops for aut o sh ad ing to take place.

3. After auto shading, the tx motor feeds the origina l through the scanner.

4. The tx motor stops when th e original is at the stamping p osition.

5. The tx motor feeds the original out of the scanner.

6. The tx motor reverses so that the pick-up roller un it ret urn s to its home position.

2. Jam Conditions

The main cpu detects a docume nt jam if one of the following con ditions occurs.

Jam Condition Description Error

Code

Non-feed

Incorrect sensor

conditions

Maximum document

length exceeded

Error during feed-out

Cover open

The scan line sensor does not switch on within

3.7 s [T1] of the tx motor starting. The scan line sensor switches on while the

document sensor is off [T2]. The scan line sensor does not turn off after the

maximum document length has been fed since it turned on [T3]. This is after 11 s at standard resolution for memory tx, 23 s at standard resolution for immediate tx or at detail resolution, or 46 s at fine resolution (all these times are for a

1.2 m long document). When the final page of the document has been

fed out of the scanner, or when a jammed document has been removed, the tx motor reverses. This error occurs if a document is placed into the feeder while the motor is rotating.

The ADF cover and/or printer cover are open while the machine is working.

1-00

1-01

No error

code

No error

code

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May 29th, 1995 DETAILED SECTION DESCRIPTIONS

SCANNER

2.1.3. Video Processing

1. Analog Signal Processing

Original

Contact Image SensorAsse mbly

Image

LED Array

Amplifier

Sensor

Analog data

DIP

FCIP

Video SRAM

(VRAM)

FCE

FDU

Binary data

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The analog video signal fro m the cont act image sensor assembly is amplified on the FDU, then transferred to th e DIP (Digital Image Processor) inside the FCIP.

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+ 219 hidden pages

Ricoh FAX2700L SPECIFICATIONS fx2700

Specifications and Main Features

Frequently Asked Questions

User Manual

May 29th, 1995 OVERALL MACHINE INFORMATION