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FX6

RICOH FAX2700L

SERVICE MANUAL




May 29th, 1995
Subject to change
IWARNING
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)

ICAUTION
The danger of explosion exists if a battery of this type is incorrectly
replaced. Replace only with the same or an equivalent type
recommended by the manufacturer. Discard used batteries in
accordance with the manufacturer's instructions.
May 29th, 1995 OVERALL MACHINE INFORMATION
SPECIFICATIONS


1. OVERALL MACHINE INFORMATION
1.1. SPECIFICATIONS Protocol
Group 3 with ECM
Type
Desktop type transceiver Modulation
V.29 (QAM), V.27ter (PHM), V.21 (FM)
Circuit
PSTN, PABX Data Rate (bps)
9600/7200/4800/2400, Automatic fallback
Connection
Direct couple I/O Rate
With ECM: 0 ms/line
Document Size Without ECM: 2.5, 5, 10, 20, or 40 ms/line
Length:
105 - 420 mm [4.1 - 16.5 ins] Transmission Time
Up to 1.2 m [47.2 ins], manually assisted 9 s at 9600 bps; Measured with G3 ECM us-
Up to 14 m [46 ft] after adjustment ing memory for a ITU-T #1 test document
Width: (Slerexe letter) at standard resolution
148 - 304 mm [5.8 - 12.0 ins] Printing System
Thickness: Laser printing, plain paper, dry toner
0.05 to 0.2 mm [2 to 8 mils]
(equivalent to 50 - 80 g/m2) Paper Size and Capacity
Standard Cassette: 250 sheets
Document Feed USA: Letter
Automatic feed, face down Europe: A4, A5 sideways
ADF Capacity Asia: A4, A5 sideways, F, F4
30 sheets (using 20 lb or 80 g/m2 paper) 100 Sheet Cassette (Optional): 100 sheets
USA: Letter, Legal
Scanning Method Europe: A4, A5 sideways
Contact image sensor Asia: A4, A5 sideways, F, F4
Universal Cassette (Optional): 250 sheets
Maximum Scan Width
Letter, Legal, A4, A5 sideways, F, F4
216 mm [8.5 ins] 0.25%
Maximum Printing Width
Scan Resolutions
208 mm [8.1 ins]
Main scan: 8 dots/mm [203 dpi]
Sub scan: Print Resolutions
Standard - 3.85 lines/mm [98 lpi] Fax and Copy Mode:
Detail - 7.7 lines/mm [196 lpi] Main scan: 16 dots per mm [406 dpi]
Fine - 15.4 lines/mm [392 lpi] Sub scan: 15.4 lines/mm [392 lpi]
Printer Mode: 300 x 300 dpi
Memory Capacity
ECM: 64 or 128 kbytes Power Supply
(depends on the amount of image data) USA: 115 20 Vac, 60 1 Hz
SAF: 244 kbytes (19 pages/Slerexe letter), Europe/Asia: 187 - 276 Vac, 50 3 Hz
extra 2 Mbyte (186 pages) or 4 Mbyte (350
pages) memory card available Power Consumption (Base Machine Only)
Standby: Minimum 2 W; Normal 20 W
Compression Transmit: 25 W
MH, MR, EFC, MMR, SSC (MMR only with Receive: 210 W
ECM) Copying: 270 W
SAF storage for memory tx: MMR and raw
data 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 Communication Features -
User Selectable
KEY: O = Used, X = Not Used,
Auto dialing (pulse or DTMF) O
A = With optional memory only,
B = With optional 100 sheet cassette only Auto Document O
C = With optional counter only Auto image density selection X
D = With optional handset only Auto paper size selection X
E = PIF Automatic Voice Message X
Batch Transmission (max 6 files) A
Equipment Broadcasting O
ADF O Chain Dialing O
Book scan X Communication Result Display X
Built-in handset X Confidential ID Override O
Bypass feed: 1 sheet O Confidential Transmission O
Optional cassette: 100 sheets B Direct Fax Number Entry O
Optional cassette: Universal O Economy Transmission X
Cabinet X Fax on demand X
Counter C Forwarding A
Cutter X Free Polling O
Handset D Groups (7 groups) O
Hard disk X Group Transfer Station X
Manual feed mechanism X Hold X
Marker (Stamp) O ID Transmission O
Monitor speaker O Immediate Redialing O
Optional printer interface E Immediate transmission O
Keystroke Programs O
Video Processing Features Memory transmission O
Contrast O Multi-step Transfer X
Halftone (Basic & Error Diffusion) O Next Transfer Station X
MTF O OMR X
Reduction X On Hook Dial O
Resolution O Ordering Toner X
Smoothing to 16 x 15.4 l/mm O Page Count O
Personal Codes O
Personal Codes with Conf. ID A
Communication Features - Auto
Polling Reception O
Automatic fallback O
Polling Transmission O
Automatic redialing O
Polling tx file lifetime in the SAF O
Confidential reception A
Quick Dial (32 stations) O
Dual Access O
Reception modes (Fax, Tel, Auto) O
Substitute reception O
Length Reduction X
Remote control features X
Communication Features -
Remote Transfer X
User Selectable
Restricted Access O
Action as a transfer broadcaster X
Secured Polling O
AI Redial (last ten numbers) X
Secured Polling with Stored ID
Answering machine interface X O
Override
Authorized Reception O
Secure Transmission X
Auto-answer delay time X


1-3
OVERALL MACHINE INFORMATION May 29th, 1995
FEATURES


Communication Features - Other User Features
User Selectable Copy Mode Restriction X
Send Later O Counters O
Silent ringing detection X Daylight Saving Time O
Specified Image Area X Destination Check X
Speed Dial (90 stations) O Direct entry of names O
Super Fine Resolution File Retention Time X
X
(16 x15.4 l/mm : 400 x 400 dpi) File Retransmission X
Telephone Directory X Function Programs O
Tonal Signal Transmission O ID Code O
Transfer Request O Label Insertion ("From xxx") O
Transmission Deadline (TRD) A Language Selection O
Turnaround Polling X LCD contrast control Service
Two-step Transfer X Memory Lock A
Two in one X Memory Lock ID A
Voice Request (immed. tx only) X Modifying a memory file X
Multi Sort Document Reception A
Communication Features - Multicopy mode O
Service Selectable Own telephone number O
AI Short Protocol O Power Saver (Night Timer and
O
Auto-reduction override option O standby mode)
Busy tone detection O Print density control O
Closed Network (tx and rx) O Printing a memory file O
Continuous Polling Reception X RDS on/off O
Dedicated tx parameters O Reception Mode Switching Timer X
ECM O Reception time printing X
EFC O Reduction/Enlargement X
Inch-mm conversion X Remaining memory indicator O
Page retransmission times O Remote ID X
Page separation mark O Reverse Order Printing A
Protection against wrong conn. O RTI, TTI, CSI O
Resol'n stepdown override option X Secure ID X
Short Preamble X Service Report Transmission O
Well log O Speaker volume control O
Specified Cassette Selection B
Other User Features Substitute reception on/off O
Area code prefix X Telephone line type O
Automatic service call Service Toner Saving Mode O
Center mark O TTI on/off O
Checkered mark X User Function Keys X
Clearing a memory file O User Parameters O
Clearing a polling file O Wild Cards O
Clock O
Confidential ID A
Copy editing (Erase
X
Center/Margin)
Copy mode O



1-4
May 29th, 1995 OVERALL MACHINE INFORMATION
FEATURES


Reports - Automatic Service Mode Features
Charge Control Report X File Transfer O
Communication Failure Report O LCD contrast adjustment O
Confidential File Report A Line error mark O
Error Report O Memory file printout (all files) O
Memory Storage Report O Modem test O
Mode Change Report X NCU parameters O
Polling Clear Report O Operation panel test O
Polling Reserve Report O Periodic service call O
Polling Result Report O PM Call O
Power Failure Report O Printer mechanism test O
TCR (Journal) O Printer test patterns O
Toner Cassette Order Form X Programmable attenuation X
Transfer Result Report X Protocol dump list O
Transmission Result Report O RAM display/rewrite O
RAM dump O
Reports - User-initiated RAM test O
Authorized Reception List O Ringer test X
Charge Control Report X Scanner lamp test O
File List O Scanner mechanism test O
Forwarding List A Sensor initialization X
Group List O Serial number O
Personal Code List O Service monitor report O
Program List O Service station number O
Quick Dial List O Software upload/download O
Specified Cassette Selection List B SRAM data download O
Speed Dial List O System parameter list O
TCR O Technical data on the TCR O
Transmission Status Report X Thermal head parameters X
User Function List X Transmission Status Report X
User Parameter List O User data transfer O


Service Mode Features Memory Files
Auto Paper Select test X Max. number of files: 100
Back-to-back test O
Max. number of stations/file: 132
Bit switch programming O
Max. number of stations overall: 300
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


1-5
OVERALL MACHINE INFORMATION May 29th, 1995
COMPONENT LAYOUT


1.3. COMPONENT LAYOUT

1.3.1. Mechanical Components



16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

17




18
19
20



21
22
23



24 25 26 27 28 29 30 31



H516V501.wmf



No. Name Description
1 R2 Roller Feeds the document through the scanner.
2 R1 Roller Feeds the document through the scanner.
3 Document Feed Roller Feeds the document into the scanner.
4 Separation Pad Allows one page into the scanner.
Pick-up Roller Picks up pages of the document from the document
5
table one at a time.
6 Pressure Plate This applies pressure against the pick-up roller.
CTM (Cleaning Toner This consists of the toner cartridge, cleaning unit, used
7
Magazine) toner tank, charge corona unit, and quenching lamp.
Used Toner Tank This removes and stores excess toner from the master
8
after image transfer. It is part of the CTM.



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
9
print cycle. It is part of the CTM.
Quenching Lamp This removes excess charge from the master at the
10
end of the print cycle. It is part of the CTM.
11 Cleaning Blade This wipes toner off the OPC drum.
Used Toner Collection This catches the used toner and the transfers the toner
12
Roller to the used toner tank. It is part of the CTM.
13 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
14
of the hot roller.
15 Hot Roller Strippers These take the paper off the hot roller after fusing.
16 Paper Feed-out Rollers These feed the paper out of the printer.
Fusing Pressure Roller This applies pressure to the paper during the fusing
17
process.
OPC Drum The latent image is written to this Organic
18
Photoconductor Drum.
Development Unit This consists of the development roller, toner
19
application roller, toner supply bar, and transfer roller.
Transfer Roller This applies a charge to the paper to pull the toner off
20
the drum and onto the copy paper.
21 Development Roller This roller applies toner to the latent image on the drum.
22 Toner Application Roller This roller transfers toner to the development roller.
Toner Supply Bar This stirs up and transfers toner to the toner application
23
roller.
Paper Feed Rollers (100 These pick up the top sheet of paper from the stack in
24 Sheet Cassette) the optional 100 sheet cassette and feed it into the
printer.
Paper Feed Pressure These feed paper from the cassette or bypass feed slot
25
Rollers into the printer.
26 Registration Roller This carries out the registration process.
Paper Feed Rollers These pick up the top sheet of paper from the stack in
27
the cassette and feed it into the printer.
Toner Supply Roller This supplies toner to the development unit. It is part of
28
the toner tank.
Toner Agitator This stirs up toner in the toner tank, so that it does not
29
collect into lumps.
Toner Tank This supplies toner to the development unit. It is part of
30
the CTM.
Laser Unit This consists of the LDDR (Laser Diode Driver),
31 Focusing lens, F Lenses, Hexagonal mirror motor, and
other laser optic components.




1-7
OVERALL MACHINE INFORMATION May 29th, 1995
COMPONENT LAYOUT


1.3.2. Drive Components



11 10 9 8 7 6 5 4 3 2 1




12

13




14

15


16 17 18 19 20 21 22


H516V502.wmf



No. Name Description
1 Tx Motor This stepper motor drives the scanner.
2 R1/R2 Rollers These feed the document through the scanner.
Document Feed Drive This drives the document feed and pick-up rollers.
3
Gear
Document Feed Roller This drives the document feed roller.
4
Drive Gear
5 Pick-up Roller Drive Gear This drives the pick-up roller.
6 Drum Drive Gear This drives the drum.
Used Toner Collection This drives the used toner collection roller (magnetic) in
7
Roller Drive Gear the used toner tank.
8 Transfer Roller Drive Gear This drives the transfer roller.
9 Hot Roller Drive Gear This drives the hot roller.
Fusing Pressure Roller This drives the pressure roller in the fusing unit.
10
Drive Gear


1-8
May 29th, 1995 OVERALL MACHINE INFORMATION
COMPONENT LAYOUT


No. Name Description
11 Paper Feed-out Roller This feeds printouts out of the machine.
Development Roller Drive This drives the development roller.
12
Gear
Toner Application Roller This drives the toner application roller.
13
Drive Gear
Paper Feed Roller Drive This drives the paper feed roller in the optional 100
14
Gear (100 Sheet Cassette) sheet cassette.
Registration Roller Drive This drives the registration roller.
15
Gear
Paper Feed Motor This stepper motor drives the paper feed mechanisms
16
and the registration roller.
Paper Feed Roller Drive The gears in this box drive the paper feed roller in the
17
Gear Box main cassette.
Paper Feed Roller Drive This drives the paper feed roller.
18
Gear
Main Motor This brushless dc motor drives the drum, fusing unit,
19
development unit, and CTM.
Toner Supply Gear This ensures the supply of toner from the toner tank in
20 the CTM, and its distribution across the full length of
the development unit.
21 Toner Agitator Drive Gear This drives the toner agitator.
22 CTM Drive Gear This drives the CTM.




1-9
OVERALL MACHINE INFORMATION May 29th, 1995
COMPONENT LAYOUT


1.3.3. Electrical Components
6
7
8 5

9 4
3
2

1




10 14
13

11 12
H516V503.wmf




1-10
May 29th, 1995 OVERALL MACHINE INFORMATION
COMPONENT LAYOUT


1. PCBs

No. Name Description
FDU (Facsimile Driver This board contains drivers for the motors, a dc-dc
3 Unit) converter, the energy saving mode cpu, and other drive
electronics.
FCE (Facsimile Control This board controls the machine. It contains the main
6
Engine) cpu, flash ROM, system RAM, and so on.
NCU (Network Control This board contains a relay and switches for interfacing
2
Unit) the machine to the network and the handset.
OPU (Operation Panel This board controls the operation panel.
7
Unit)
PSU (Power Supply Unit) This board supplies power to the machine, and
1
switches the fusing lamp on/off.
LDDR (Laser Diode This board drives the laser diode.
8
Driver)
Power Pack This supplies high voltages to the corona wire, transfer
10
roller, and development rollers.
Contact Image Sensor This sensor reads and converts the light reflected from
Assembly the document into an analog video signal. It uses an
4 RLA (Rod Lens Array) sensor unit.
An LED array which illuminates the document is
contained in this unit.


2. Motors

No. Name Description
14 Tx Motor This stepper motor drives the scanner.
Main Motor This brushless dc motor drives the drum, fusing unit,
13
development unit, and CTM.
Paper Feed Motor This stepper motor drives the registration roller and the
12
paper feed mechanisms in the cassettes.
Hexagonal Mirror Motor This high-speed dc motor drives the hexagonal mirror
5
in the laser printer optics.
Ozone Fan Motor This removes ozone-laden air from the vicinity of the
9
drum, and filters out the ozone.
11 Cooling Fan Motor This cools the interior of the machine.




1-11
OVERALL MACHINE INFORMATION May 29th, 1995
COMPONENT LAYOUT



17 16
18 15
19




20
21




22 33

23
24 32
25 31
26 30
27 28 29
H516V504.wmf



3. Sensors

No. Name Description
17 Document Sensor This detects the presence of a document in the feeder.
Scan Line Sensor This detects when a page is approaching the auto
15
shading position.
31 Toner End Sensor This detects when the toner has run out.
Paper Size Detector This detects the paper size installed in the cassette.
27
The user must install the correct size indicator.
32 Paper End Sensor This detects when the paper in the cassette has run out.
Registration Sensor This detects when paper has reached the registration
26
roller.
Fusing Exit Sensor This detects when the paper has been fed out of the
29
printer.
Fusing Exit Cover Switch This detects whether the fusing exit cover is open or
28
closed.
Bypass Feed Sensor This detects when a sheet of paper has been inserted
into the bypass feed slot. Then the registration roller
25
feeds the paper a short distance into the machine to
prepare for printing, and stops.




1-12
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
30
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
16
successfully fed through the scanner.
Quenching Lamp This removes excess charge from the drum at the end
20
of the print cycle. This is a part of CTM.
Charge Corona Unit This applies a charge to the drum at the start of the
21
print cycle. This is a part of CTM.
Thermostat This interrupts the ac power supply to the fusing lamp if
23 the temperature of the thermostat surface exceeds
400C.
24 Thermistor This monitors the temperature at the hot roller surface.
22 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
18
telephone line.
Zener Diode This ensures that the charge given to the drum by the
33
charge corona wire does not exceed -750 volts.
Ozone Filter This removes ozone-laden air from the vicinity of the
19
drum.




1-13
OVERALL MACHINE INFORMATION May 29th, 1995
COMPONENT LAYOUT


6. Optional Equipment
35

36
37



38




34

39 41
40
H516V505.wmf




No. Name Description
34 Counter This counts the number of prints.
Printer Interface This allows the machine to be connected to a computer
35
as a laser printer.
RS232C Interface Board* This allows the machine to be connected to a computer
36
as an external fax device, for example.
IC Card This increases the SAF memory capacity. Either a 2
37
MB or 4 MB card can be used.
100 Sheet Cassette This increases the paper capacity of the machine, and
38 allows the machine to have more than one paper size
available at the same time.
Paper Size Detector (100 This detects the paper size installed in the cassette.
39
Sheet Cassette)
Paper End Sensor (100 This detects when the paper in the cassette has run out.
40
Sheet Cassette)
Paper Feed Clutch (100 This transfers drive from the paper feed motor to the
41
Sheet Cassette) paper feed roller in the cassette.


* 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
RS232C I/F




Optional DRAM
IC Card

Working ECM/SAF Page
RAM Memory Memory System System
Optional ROM RAM Video
100 Sheet (Flash) (SRAM) SRAM
Cassette
FDU
DATA/ADDRESS BUS

FCE
Optional
LDDR
Printer I/F
CPU
Energy MDM DMAC DCR DIP LIF PRIF
Saver RU8
CPU
FCIP Thermistor



Control
Signals Contact
Amplifier Image
Sensor

Hybrid IC Drivers
External I/O (EXIO) (FPD)
(HIC)
DC-DC
PSU Tx
Converter
and
paper
Driver feed
motors




Fusing Power Optional Scanner Operation
NCU Speaker Sensors
Lamp Pack Counter and Panel
printer
components
and
Handset
sensors

H516V506.wmf



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 machine: the main cpu (FCIP) on the FCE and the
energy saver cpu on the FDU. In energy saver mode, the main CPU switches
off and the energy saver CPU takes over.
The FCIP consists of the following component blocks:
RU8 CPU - Main CPU MDM - Modem
LIF- Laser Interface DMAC - DMA Controller
PRIF - Printer Interface DIP - Digital Image Processor
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
Image Sensor
LED Array



FDU
Amplifier


FCE
Video DIP
Processing FCIP
Memory DCR MDM Amplifier



DATA/ADDRESS BUS



DRAM

Line Attenuator
SAF IC ECM/
Buffer
Card SAF
/FIFO
Memory Memory

HIC




NCU
DIP: Digital Image Processor
DCR: Data Compression & Reconstruction
MDM: Modem
To the network
H516V507.wmf

Immediate Transmission:
Scanned data form the contact image sensor passes to the DIP block in the
FCIP. After analog/digital video processing, the DCR block compresses the
data for transmission. The compressed data then passes 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 stored in the SAF memory after compression in the
DCR block.
At the time for transmission, the DCR block decompresses the data from the
SAF memory, then compresses it again after handshaking with the other ter-
minal is done. The compressed data then passes either to the FIFO memory
or to the ECM memory, before it is sent to the telephone line through the
modem.


1-16
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

DCR LIF




DATA/ADDRESS BUS



LDDR
DRAM

Line Buffer
ECM/SAF Page
/FIFO
Memory Memory
Memory




Copy Paper



H516V508.wmf



Data from the line passes to the modem through the NCU and hybrid IC. Af-
ter the modem demodulates the data, the decompressed data passes to the
DCR block, through either the FIFO or the ECM memory, where the data is
decompressed to raster image data. At the same time, the compressed data
passes to the SAF memory as a backup in case of mechanical problems dur-
ing printing (substitute reception).
The raster image data is then passed 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.




1-17
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
DIP SAF
Video Memory
Processing FCIP IC Card
Memory
DCR LIF




DATA/ADDRESS BUS




DRAM

Line Buffer
ECM/SAF Page
/FIFO
Memory Memory
Memory

LDDR




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

H516V509.wmf



Single copy
The scanned data passes to the page memory after video processing in the
DIP block. After a page of data has been stored in the page memory, the data
is sent to the LDDR through the LIF block.
Multi-page copy
The scanned data passes to the SAF memory after video processing (DIP)
and compression (DCR). After a page of data has been stored in the SAF
memory, the data passes to the DCR block again for decompression, then it
passes to the page memory for printing.




1-18
May 29th, 1995 OVERALL MACHINE INFORMATION
VIDEO DATA PATH


1.5.4. Printing from the Optional Printer Interface




Optional Printer
Interface



FDU
FCE
PRIF


FCIP LIF




LDDR




LIF: Laser Interface
PRIF: Printer Interface
Copy
Paper

H516V510.wmf


The page memory inside the printer interface 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 Interface) block.




1-19
OVERALL MACHINE INFORMATION May 29th, 1995
POWER DISTRIBUTION


1.6. POWER DISTRIBUTION

1.6.1. Distribution Diagram
IC Optional Optional 100 Printer RS232C
Card Counter Sheet I/F I/F
Cassette
+12VP
+5V +24VM +24V +5V
+24VD
+5VD +5V +5V
+24VM
FDU Motors
+12VD
+5VBAT FCE
+24VD
Feed Clutch
AC +5VD
Main
+24VD
Power Stamp
+5V

+24VD Cooling Fan
Ozone Fan

Main Switch 12VP +24VD
DC-DC Power Pack
Converter +5VD
PSU
+5V
+24V DC-DC +5V Thermistor
AC Switching DC-DC
Circuit Converter Converter
+5V
+5VE Printer Sensors
Fusing Lamp 24VIN +5V
+24VM
ON/OFF +5vv +5VE
Circuit -5V Operation Panel
+24VD




+5VE
+5VLD
AC115V or 230V




+5VLD




+24VM

+5VV
+5VE
+24V




Scanner Sensors
+5V

-5V
Image Sensor
Fusing LDDR NCU
+24VM


Lamp Fusing Unit
Interlock
Switches LED Array



H516V511.wmf


The PSU supplies +24V dc power to the FDU. The FDU converts the +24V
dc power supply to the following supplies.

+5V This is normally on when the main switch is on.
This is used for watching for an activation signal from the NCU, document
+5VE
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
+5VLD
switch opens.
This is a more stable power supply than +5V. It is used for the Contact Image
+5VV
Sensor.
This supplies the DRAM and the optional IC card on the FCE to back up the
+5VD 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
+5VBAT
the power is switched off. A lithium battery is used to generate +5VBAT.
+24V This is normally on when the main switch is on.
+24VD 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
+24VIN
the fusing unit cover interlock switch opens.
+24VM This is interrupted if the machine enters energy saving mode.
-5V This is used for the image sensor.
+12VP 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]




H516V512.wmf


The +5VBAT supply from the lithium battery [A] backs up the system RAM
which contains system parameters and programmed telephone numbers,
and the real time clock in the main cpu. The 5RTCCS signal tells the main
cpu whether the back-up power (+5VBAT) is coming from the battery or from
the +5V power supply.
A rechargeable lithium battery [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 +5VE supply
recharges the battery. The battery recharges in one or two days.

The battery [B] generates about 3 volts (max. 3.2 volts). The dc/dc converter
(IC12) lifts this voltage to 5 volts so it can be used as the +5VD supply for
SAF backup. The CPU monitors the voltage of the +5VD supply with the
1VDET signal. When the battery has run down, and the voltage is lower than
4.4 volts, the CPU stops the dc/dc converter by dropping 1SAFFG to low and
the machine stops backing up the memory.
There is no battery switch for the battery [B].




1-21
May 29th, 1995 DETAILED SECTION DESCRIPTIONS
SCANNER


2. DETAILED SECTION DESCRIPTIONS
2.1. SCANNER

2.1.1. Mechanisms

1. Document Detection
[A] [B]




H516D501.wmf H516D500.wmf


The document sensor [A] detects when a document is placed in the ADF. The
fold-down extension [B] helps to support longer documents.
2. Pick-up and Separation
H516D503.wmf
[D]
[A]




[B]
[C]



Plate [A] aligns the leading edges of the pages of the document. When the
machine starts feeding the document, the mechanical clutch mechanism in
the ADF roller unit lifts up the pick-up roller [B] to feed the bottom sheet of the
document. Then, the feed roller [C] feeds the sheet into the scanner.
The separation rubber plate [D] prevents the feed roller from feeding more
than one sheet at a time.
Cross reference
ADF mechanical clutch mechanism: Group 3 Facsimile Manual, page 2-2-8




2-1
DETAILED SECTION DESCRIPTIONS May 29th, 1995
SCANNER


3. Drive Mechanism
[B] [C] [E]

[D]


[A]




H516D502.wmf


The tx motor [A] drives the pick-up roller [B], feed roller [C], R1 roller [D], and
R2 roller [E].
The scanning speed for each resolution mode is as follows.

Resolution Scan speed (/A4)
Standard - Storage to SAF (Memory Tx or Multi-copy mode) 2.83 s
Standard - Immediate Tx or Single copy mode 5.65 s
Detail 5.65 s
Fine 11.30 s


The scanner can feed paper up to 304 mm (12.0") wide, however the actual
scan width is 216 mm (8.5").
The maximum acceptable document page length can be adjusted 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
May 29th, 1995 DETAILED SECTION DESCRIPTIONS
SCANNER


4. Image Scanning
[G]
[A]


[B]




[F]
[C]
[D]
[E]

H516D544.wmf



The scanner consists of a shading plate [A] and a contact image sensor
(CIS) assembly [B]. Inside the CIS are an exposure glass [C], a rod lens ar-
ray [D], an image sensor [E], and an LED array [F].
The image sensor consists of a row of 1728 photosensitive elements (Letter
width x 8 dots/mm). Light from the LED array is reflected from the document
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 document surface always touches the exposure glass at the
scan line.
The image sensor assembly is adjusted at the factory, so it does not need
any adjustment at replacement in the field.
The image sensor scans the original one line at a time, and outputs an ana-
log signal for each line. The voltage from each element depends on the
intensity of the light reflected from the original onto the element; the intensity
of the light depends on the darkness of the area of the document it was re-
flected from.




2-3
DETAILED SECTION DESCRIPTIONS May 29th, 1995
SCANNER


5. Sub Scan Resolution Conversion

Standard: The machine feeds the document in 7.7 line/mm steps, and scans
it in accordance with the setting of scanner bit switch 00, bit 4. A scanning
resolution of 3.85 lines/mm means that the machine scans once every two
motor steps.

Scanner bit switch 00
Bit 4 = 0 Bit 4 = 1
Scan - 7.7 l/mm
Scan - 3.85 l/mm
Immediate tx/ Copying Tx/Copy - 3.85 l/mm
Tx/Copy - 3.85 l/mm
(OR processed)
Scan - 3.85 l/mm OR processing is always
Scanning to memory
Tx/Copy - 3.85 l/mm disabled.

Detail: The machine feeds and scans the document in 7.7 line/mm steps.
The scanned lines are transmitted without any conversion.
Fine: The machine feeds and scans the document in 15.4 line/mm steps.
The scanned lines are transmitted without any conversion. In memory trans-
mission, if the other terminal cannot receive a message at Fine resolution,
alternate lines (even-numbered lines) are deleted before transmission.
6. Stamping

[A]

FDU Stamp

+24VD
FCE CN18-6


FCIP EXIO 24
CN18-5




H516D542.wmf


The original always stops at the stamping position after the page was trans-
mitted (immediate transmission) or stored (memory transmission)
successfully.
If the Stamp LED is turned on, the cpu drops the voltage at CN18-5 for 500
ms to activate the stamper solenoid [A]. Then the original is fed out of the
scanner.
If the Stamp LED is turned off, the machine feeds