Ricoh fax2000l User manual

SCHMIDT 1 TAIWAN
RICOH FAX2000L
SERVICE MANUAL
30 November, 1999
Subject to change

Important Safety Notices
Laser Safety
øWARNING FOR LASER UNIT
This machine contains a laser beam generator. Laser beams can cause
permanent eye damage. Do not open the laser unit or look along the laser
beam path while the main power is on.
Lithium Batteries (Memory Back-up)
øCAUTION
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.
H545R500.WMF

i
TABLE OF CONTENTS
1. OVERALL MACHINE INFORMATION........................................1-1
1.1 SPECIFICATIONS.................................................................................... 1-1
1.2 FEATURES............................................................................................... 1-3
1.3 COMPONENT LAYOUT........................................................................... 1-7
1.3.1 MECHANICAL COMPONENTS....................................................... 1-7
1.3.2 ELECTRICAL COMPONENTS........................................................ 1-9
1.4 OVERALL MACHINE CONTROL ........................................................... 1-13
1.5 VIDEO DATA PATH ............................................................................... 1-14
1.5.1 TRANSMISSION............................................................................ 1-14
1.5.2 RECEPTION.................................................................................. 1-15
1.5.3 COPYING ...................................................................................... 1-16
1.6 POWER DISTRIBUTION........................................................................ 1-17
1.6.1 DISTRIBUTION DIAGRAM............................................................ 1-17
1.6.2 MEMORY BACK-UP CIRCUIT ...................................................... 1-18
2. DETAILED SECTION DESCRIPTIONS.......................................2-1
2.1 SCANNER................................................................................................ 2-1
2.1.1 MECHANISMS................................................................................. 2-1
2.1.2 JAM CONDITIONS.......................................................................... 2-3
2.2 PRINTING................................................................................................. 2-4
2.2.1 PRINTING PROCESS - OVERVIEW............................................... 2-4
2.2.2 OPC DRUM ..................................................................................... 2-5
2.2.3 CHARGE ......................................................................................... 2-5
2.2.4 LASER EXPOSURE........................................................................ 2-6
2.2.5 TONER SUPPLY............................................................................. 2-8
2.2.6 DEVELOPMENT............................................................................ 2-10
2.2.7 PAPER FEED................................................................................ 2-14
2.2.8 REGISTRATION............................................................................ 2-19
2.2.9 TRANSFER AND SEPARATION................................................... 2-21
2.2.10 CLEANING................................................................................... 2-22
2.2.11 FUSING ....................................................................................... 2-23
2.3 SYSTEM FEATURES............................................................................. 2-27
2.3.1 ENERGY SAVER MODES ............................................................ 2-27
2.3.2 AUTOMATIC SERVICE CALLS..................................................... 2-29
2.3.3 SEP/SUB CODING........................................................................ 2-30
2.3.4 PAGE SEPARATION AND DATA REDUCTION............................ 2-33
2.3.5 MEMORY RECEPTION CONDITIONS ......................................... 2-35
2.3.6 V.8/V.34 PROTOCOL.................................................................... 2-36
2.3.7 BLANK SHEET DETECTION......................................................... 2-38
2.4 PCBS...................................................................................................... 2-39
2.4.1 FCU ............................................................................................... 2-39
2.4.2 PSU ............................................................................................... 2-41
2.4.3 NCU (USA/TAIWAN) ..................................................................... 2-42

ii
3. INSTALLATION...........................................................................3-1
3.1 INSTALLING THE MACHINE................................................................... 3-1
3.2 INITIAL PROGRAMMING......................................................................... 3-1
3.3 INSTALLING OPTIONAL UNITS.............................................................. 3-1
4. SERVICE TABLES AND PROCEDURES ...................................4-1
4.1 SERVICE LEVEL FUNCTIONS................................................................ 4-1
4.1.1 BIT SWITCH PROGRAMMING (FUNCTION 01)............................. 4-1
4.1.2 SYSTEM PARAMETER LIST (FUNCTION 02)................................ 4-2
4.1.3 ERROR CODE DISPLAY (FUNCTION 03)...................................... 4-2
4.1.4 SERVICE MONITOR REPORT (FUNCTION 04)............................. 4-2
4.1.5 GROUP 3 PROTOCOL DUMP (FUNCTION 05) ............................. 4-2
4.1.6 PC PROTOCOL DUMP (FUNCTION 05) ........................................ 4-3
4.1.7 RAM DISPLAY/REWRITE (FUNCTION 06)..................................... 4-3
4.1.8 RAM DUMP (FUNCTION 06)........................................................... 4-3
4.1.9 COUNTER DISPLAY/REWRITE (FUNCTION 07)........................... 4-4
4.1.10 NCU PARAMETERS (FUNCTION 08)........................................... 4-5
4.1.11 MODEM TEST (FUNCTION 08).................................................... 4-5
4.1.12 DTMF TONE TEST (FUNCTION 08)............................................. 4-5
4.1.13 V.8 MODEM TEST (FUNCTION 08).............................................. 4-6
4.1.14 V.34 MODEM TEST (FUNCTION 08)............................................ 4-6
4.1.15 RINGER TEST (FUNCTION 08).................................................... 4-7
4.1.16 OPERATION PANEL TEST (FUNCTION 09)................................ 4-7
4.1.17 LED ARRAY TEST (FUNCTION 10).............................................. 4-7
4.1.18 ADF TEST (FUNCTION 10)........................................................... 4-8
4.1.19 PRINTER TEST PATTERNS (FUNCTION 11).............................. 4-8
4.1.20 PRINTER MECHANISM TEST - FREE RUN (FUNCTION 11)...... 4-8
4.1.21 RAM TESTS (FUNCTION 12)........................................................ 4-9
4.1.22 SOFTWARE DOWNLOAD (FUNCTION 12).................................. 4-9
4.1.23 SOFTWARE UPLOAD (FUNCTION 12)...................................... 4-10
4.1.24 SRAM DATA DOWNLOAD (FUNCTION 12)............................... 4-11
4.1.25 SERVICE STATION FAX NUMBER (FUNCTION 13) ................. 4-12
4.1.26 SERIAL NUMBER (FUNCTION 14)............................................. 4-12
4.2 BIT SWITCHES...................................................................................... 4-13
4.2.1 SYSTEM SWITCHES.................................................................... 4-13
4.2.2 SCANNER SWITCHES ................................................................. 4-21
4.2.3 PRINTER SWITCHES................................................................... 4-22
4.2.4 COMMUNICATION SWITCHES.................................................... 4-25
4.2.5 G3 SWITCHES.............................................................................. 4-30
4.3 NCU PARAMETERS .............................................................................. 4-37
4.4 DEDICATED TRANSMISSION PARAMETERS..................................... 4-46
4.4.1 PROGRAMMING PROCEDURE................................................... 4-46
4.4.2 PARAMETERS.............................................................................. 4-47
4.5 SERVICE RAM ADDRESSES................................................................ 4-49

iii
5. PREVENTIVE MAINTENANCE...................................................5-1
5.1 SPECIAL TOOLS AND LUBRICANTS ..................................................... 5-1
5.2 PM TABLE................................................................................................ 5-1
6. REPLACEMENT AND ADJUSTMENT........................................6-1
6.1 EXTERIOR ............................................................................................... 6-1
6.1.1 TOP COVER.................................................................................... 6-1
6.1.2 OPERATION PANEL....................................................................... 6-2
6.2 ADF........................................................................................................... 6-2
6.2.1 FEED ROLLER ASSEMBLY............................................................ 6-2
6.2.2 SEPARATION ROLLER .................................................................. 6-3
6.3 SCANNER................................................................................................ 6-3
6.3.1 SCANNER UNIT DISASSEMBLY.................................................... 6-3
6.3.2 SCANNER MOTOR......................................................................... 6-4
6.3.3 R1/R2 ROLLERS............................................................................. 6-5
6.3.4 CONTACT IMAGE SENSOR ASSEMBLY....................................... 6-5
6.3.5 SCANNER UNIT.............................................................................. 6-6
6.4 LASER PRINTING COMPONENTS ......................................................... 6-7
6.4.1 LASER UNIT.................................................................................... 6-7
6.5 DEVELOPMENT....................................................................................... 6-9
6.5.1 TRANSFER ROLLER...................................................................... 6-9
6.6 FUSING.................................................................................................. 6-10
6.6.1 FUSING UNIT................................................................................ 6-10
6.6.2 THERMISTOR............................................................................... 6-11
6.6.3 HOT ROLLER STRIPPERS........................................................... 6-11
6.6.4 FUSING LAMP AND HOT ROLLER.............................................. 6-12
6.6.5 PRESSURE ROLLER.................................................................... 6-13
6.6.6 THERMOSTAT AND THERMOFUSE............................................ 6-13
6.7 PCBS...................................................................................................... 6-14
6.7.1 NCU............................................................................................... 6-14
6.7.2 PSU ............................................................................................... 6-14
6.7.3 POWER PACK............................................................................... 6-15
6.7.4 FCU ............................................................................................... 6-15
6.8 PAPER FEED......................................................................................... 6-16
6.8.1 SEPARATION PAD ....................................................................... 6-16
6.8.2 PAPER FEED UNIT ASSEMBLY AND PAPER FEED MOTOR.... 6-17
6.8.3 PAPER END SENSOR AND REGISTRATION SENSOR.............. 6-18
6.8.4 PAPER FEED ROLLER/CLUTCH AND TRANSPORT ROLLER... 6-18
6.9 OTHERS................................................................................................. 6-19
6.9.1 INTERLOCK SWITCHES .............................................................. 6-19
6.9.2 MAIN MOTOR................................................................................ 6-20
6.9.3 REGISTRATION ROLLER............................................................. 6-21
6.9.4 TONER END SENSOR.................................................................. 6-22
6.10 PAPER FEED UNIT (OPTIONAL)........................................................ 6-23
6.10.1 TRANSPORT ROLLER ............................................................... 6-23
6.10.2 PAPER FEED ROLLER AND PAPER FEED CLUTCH............... 6-23
6.10.3 CONNECTOR.............................................................................. 6-24
6.11 IMAGE ADJUSTMENT......................................................................... 6-25

iv
6.11.1 OVERVIEW ................................................................................. 6-25
6.11.2 SCANNER PARAMETERS.......................................................... 6-26
6.11.3 PRINTER PARAMETERS............................................................ 6-27
6.11.4 SCANNER VIDEO PROCESSING PARAMETERS..................... 6-29
7. TROUBLESHOOTING.................................................................7-1
7.1 COPY QUALITY TROUBLESHOOTING .................................................. 7-1
7.1.1 BLANK COPIES............................................................................... 7-2
7.1.2 BLACK COPIES............................................................................... 7-2
7.1.3 DIRTY BACKGROUND ................................................................... 7-3
7.1.4 UNEVEN IMAGE DENSITY............................................................. 7-4
7.1.5 VERTICAL BLACK LINES ............................................................... 7-5
7.1.6 HORIZONTAL BLACK LINES.......................................................... 7-6
7.1.7 VERTICAL WHITE LINES ............................................................... 7-7
7.1.8 HORIZONTAL WHITE LINES.......................................................... 7-8
7.1.9 BLACK DOTS/SPOTS..................................................................... 7-9
7.1.10 WHITE SPOTS IN BLACK IMAGE AREAS ................................. 7-10
7.1.11 FAINT COPIES............................................................................ 7-11
7.1.12 VERTICAL BLACK BAND............................................................ 7-13
7.1.13 UNFUSED COPIES..................................................................... 7-14
7.1.14 GHOST IMAGE............................................................................ 7-14
7.1.15 TONER ON THE BACK OF THE PRINTER PAPER................... 7-15
7.1.16 INCORRECTLY ALIGNED OUTPUT (DATA SHIFTED TO
THE RIGHT OR LEFT)................................................................ 7-15
7.1.17 INCORRECTLY ALIGNED OUTPUT (IMAGE SHIFTED
VERTICALLY)/REDUCED IMAGE .............................................. 7-16
7.2 MECHANICAL PROBLEMS ................................................................... 7-17
7.2.1 ADF/SCANNER............................................................................. 7-17
7.2.2 PRINTER....................................................................................... 7-20
7.3 SERVICE CALL CONDITIONS............................................................... 7-24
7.4 ERROR CODES..................................................................................... 7-26
7.5 ELECTRICAL COMPONENT DEFECTS................................................ 7-34
7.5.1 DEFECTIVE SENSOR TABLE ...................................................... 7-34
7.5.2 BLOWN FUSE TABLE................................................................... 7-34

30 November, 1999 SPECIFICATIONS
1-1
Overall
Information
1. OVERALL MACHINE INFORMATION
1.1 SPECIFICATIONS
Type
Desktop transceiver
Circuit
PSTN, PABX
Connection
Direct couple
Document Size
Length:
105 - 364 mm
Up to 1.2 m, manually assisted
Width:
148 - 257 mm
Thickness:
0.05 to 0.2 mm
(equivalent to 50 - 80 g/m2)
Document Feed
Automatic feed, face down
ADF Capacity
30 sheets (using A4 size 70 g/m2 paper)
15 sheets (using B4 size 70 g/m2paper)
Scanning Method
Contact image sensor, with xenon lamp
Maximum Scan Width
256 mm ±0.25%
(Effective scan width: 250 mm)
Scan Resolutions
Main scan: 8 dots/mm [203 dpi]
Sub scan:
Standard - 3.85 lines/mm [98 dpi]
Detail - 7.7 lines/mm [196 dpi]
Fine - 15.4 lines/mm [392 dpi]
Memory Capacity
ECM: 128 Kbytes
SAF:
Standard: 512 KB (40 pages/ITU-T #1)
With 1 MB option: 120 pages
With 2 MB option: 200 pages
Compression
MH, MR, MMR, and SSC
SAF storage for memory TX: MMR
and/or raw data
Protocol
Group 3 with ECM
Modulation
V.34, V.33 (Ricoh mode only),
V.17 (TCM), V.29 (QAM), V.27ter
(PHM), V.21 (FM)
Data Rate (BPS)
33,600/31,200/28,800/26,400/24,000/
21,600/19,200/16,800/14,400/12,000/
9600/7200/4800/2400
I/O Rate
With ECM: 0 ms/line
Without ECM: 2.5, 5, 10, 20, or 40
ms/line
Transmission Time
3 seconds at 28,800 bps: Measured
with G3 ECM using memory for an ITU-
T #1 test document (Slerexe letter) at
standard resolution
Printing System
Laser printing, plain paper, dry toner
Printing Time
6 ppm for letter-size paper
Paper Size and Capacity
Standard Cassette: 250 sheets
Letter, Legal, A4, A5 sideways, F4
Paper Feed Unit (Optional):
500 sheets: Letter, Legal, A4,
A5 sideways, F4
Maximum Printing Width
208 mm [8.1 ins]
Print Resolutions
Main scan: 16 dots/mm [406 dpi]
Sub scan: 15.4 lines/mm [392 lpi]

SPECIFICATIONS 30 November, 1999
1-2
Power Supply
110 ±20 Vac, 60 ±1 Hz
Power Consumption (Max)
Standby: Minimum 2 W; Normal 10 W
Transmit: 31 W
Receive: 889 W
Copying: 898 W
Operating Environment
Temperature: 15 - 25 °C
Humidity: 30 - 70 %Rh
Dimensions (W x D x H)
399 x 730 x 323 mm
Including trays (Maximum dimensions)
Weight
Approx. 12.5 kg [27.6 lbs.]
Including cartridge and trays.

30 November, 1999 FEATURES
1-3
Overall
Information
1.2 FEATURES
KEY: O = Used, X = Not Used,
A = With optional memory only
B = With optional paper feed unit only
Equipment
ADF O
Book scan X
Bypass feed: 1 sheet X
Optional cassette: 100
sheets X
Optional cassette: Universal O
Optional paper feed unit B
Cabinet X
Mechanical counter X
Cutter X
Handset X
Hard disk X
Manual feed mechanism X
Marker (Stamp) X
Monitor speaker O
Optional memory O
Optional printer interface X
Video Processing Features
Automatic image density
selection X
Contrast O
Halftone (Basic & Error
diffusion) O
JBIG compression X
MTF O
Reduction before TX X
Scanning resolution O
Smoothing to 16 x 15.4 l/mm O
Communication Features - Auto
AI short protocol O
Automatic fallback O
Automatic redialing O
Confidential reception O
Dual access O
Communication Features - Auto
Resolutions available for
reception
Fine
Super fine X X
Substitute reception O
V.34 communication O
Communication Features -
User Selectable
Action as a transfer
broadcaster X
AI Redial (last ten numbers) O
Answering machine interface O
Authorized Reception O
Auto dialing (pulse or DTMF) O
Auto document X
Automatic voice message X
Batch transmission (max 35
files) O
Broadcasting O
Chain dialing O
Communication result
display X
Confidential ID override X
Confidential transmission X
Direct fax number entry O
Economy transmission X
Fax on demand X
Forwarding O
Groups (5 groups) O
Hold X
ID transmission X
Immediate redialing O
Immediate transmission O
ISDN X
Keystroke programs O
Memory transmission O
Multi-step transfer X
OMR X
On hook dial O
Ordering toner X
Page count O
Page separation mark O

FEATURES 30 November, 1999
1-4
Communication Features -
User Selectable
Parallel memory
transmission X
Personal codes O
Personal codes with conf. ID O
Partial image area scanning X
Polling reception O
Polling transmission X
Polling tx file lifetime in the
SAF X
PWD (tx only) O
Quick dial (30 stations) O
Reception modes (Fax, Tel,
Auto) O
Remote control features X
Remote transfer X
Restricted access X
Secured polling reception X
Secured polling reception
with Stored ID override X
Send later O
SEP (tx only) O
SID (tx only) O
Silent ringing detection X
Specified Image area X
Speed dial (50 stations) O
SUB (tx only) O
Telephone directory O
Tonal signal transmission O
Transfer request X
Transmission deadline
(TRD) X
Turnaround polling X
Two-step transfer X
Two in one X
Voice request (immediate TX
only) X
Communication Features -
Service Selectable
AI short protocol O
Auto-reduction override
option O
Busy tone detection O
Cable equalizer O
Closed network (TX and RX) X
Communication Features -
Service Selectable
Continuous polling reception X
Dedicated TX parameters O
ECM O
EFC X
Inch-mm conversion X
Page retransmission times O
Protection against bad
connections O
Short preamble X
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 O
Copy mode O
Copy mode restriction X
Counters O
Daylight saving time O
Destination check X
Direct entry of names O
Energy saver (Night timer
and standby mode) O
File retention time X
File retransmission X
Function programs O
ID code X
Label insertion ("From xxx") O
Language selection O
LCD contrast control X
Memory lock X
Modifying a memory file X
Multi-sort document
reception X
Multi-copy mode (up to 99) O
Own telephone number O
PC scanner X
PC fax X
PC print X
Print density control X

30 November, 1999 FEATURES
1-5
Overall
Information
Other User Features
Printing a memory file O
Quick dial label printing O
RDS on/off O
Reception mode switching
timer X
Reception time printing X
Remaining memory indicator O
Remote ID X
Reverse order printing O
RTI, TTI, CSI O
Service report transmission X
Speaker volume control O
Specified cassette selection B
Substitute reception on/off O
Telephone line type O
Toner saving mode X
User function keys O
User parameters O
Wild cards O
Reports - Automatic
Charge control report X
Communication failure report O
Communication result report O
Confidential file report O
Error report O
File clear report X
File reserve report X
Journal O
Power failure report O
Toner cassette order form X
Transfer result report X
Transmission result report O
Reports – User-initiated
Charge control report X
File list O
Group list O
Journal O
Personal code list O
Program list O
Programmed special
numbers list O
Quick dial / User function list O
Reports – User-initiated
Speed dial list O
Transmission status report X
User parameter list O
Service Mode Features
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
File transfer (all files) O
LCD contrast adjustment X
Line error mark O
Memory file printout (all files) O
Modem software download X
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
RDS 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 upload/download O

FEATURES 30 November, 1999
1-6
Service Mode Features
System parameter list O
Technical data on the
Journal O
Thermal head parameters X
Memory Files
Maximum number of files: 100
Maximum number of stations/file: 100
Maximum number of stations: 200

30 November, 1999 COMPONENT LAYOUT
1-7
Overall
Information
1.3 COMPONENT LAYOUT
1.3.1 MECHANICAL COMPONENTS
No Name Description
1 R2 Roller Feeds the document through the scanner.
2 R1 Roller Feeds the document through the scanner.
3 Separation Roller Allows one page into the scanner.
4 Document Feed Belt Feeds the document into the scanner.
5 Pick-up Roller Picks up document pages from the document table
one at a time.
6 Pressure Plate Applies pressure against the pick-up roller.
7 All-in-One Cartridge Consists of the toner cartridge, cleaning unit, used
toner tank, charge brush roller, application roller,
development roller and OPC drum.
8 Laser Unit Consists of the LDDR (Laser Diode Driver), focusing
lens, hexagonal mirror motor, and other laser optic
components.
9 Paper Feed Roller Picks up the top sheet of paper from the stack in the
cassette, and feeds it into the printer.
10 Separation Pad Allows one sheet of paper into the printer.
11 Registration Roller Carries out the registration process.
12 OPC Drum The latent image is written to this organic
photoconductor drum.
H545V501.WMF
1 52 3 4 6 8
9
11131415
16
17
18
10
7
12

COMPONENT LAYOUT 30 November, 1999
1-8
No Name Description
13 Transfer Roller Applies a charge to the paper to pull the toner off the
drum and onto the copy paper.
14 Hot Roller Heat from this roller fuses the toner to the copy paper.
15 Fusing Pressure Roller Applies pressure to the paper during the fusing
process.
16 Paper Feed-out Rollers Feed the paper out of the printer.
17 Hot Roller Strippers Take the paper off the hot roller after fusing.
18 Cleaning Pad Cleans up and spreads silicone oil on the surface of
the hot roller.

30 November, 1999 COMPONENT LAYOUT
1-9
Overall
Information
1.3.2 ELECTRICAL COMPONENTS
H545V502.WMF
H545V509.WMF
1 2 3 4 56
9
11
12
141618
20
19
21
13
23
24
25
26
27
15
22 7
8
17
10

COMPONENT LAYOUT 30 November, 1999
1-10
1. PCBs
No Name Description
2CIS (Contact Image
Sensor) This sensor reads and converts the light reflected from the document into an analog video signal.
5 LDDR (Laser Diode
Driver) This board drives the laser diode.
23 NCU (Network Control
Unit) This board contains relays and switches for interfacing the machine with the network and the handset.
24 OPU (Operation Panel
Unit) This board controls the operation panel.
25 FCU (Facsimile Control
Unit) This board controls the machine. It contains the main CPU, flash ROM, system RAM, etc.
26 Power Pack Supplies high voltage to the charge brush roller,
transfer roller and development rollers.
27 PSU
(Power Supply Unit) This board supplies power to the machine, and switches the fusing lamp on/off.
2. Motors
No Name Description
4 Polygon Mirror Motor This high-speed dc motor drives the hexagonal mirror
in the laser printer optics.
7 Main Motor This stepper motor drives the All-in-One cartridge and
the fusing unit.
11 Paper Feed Motor This stepper motor drives the registration roller and
the paper feed mechanisms in the cassettes.
15 Scanner Motor This stepper motor drives the scanner.
21 Cooling Fan Motor Cools the interior of the machine.
3. Sensors
No Name Description
1 Document Sensor Detects the presence of a document in the feeder.
3 Paper End Sensor Detects when the paper in the cassette has run out.
6 Paper Edge Sensor Detects when the paper has passed the paper feed
components.
8 Rear Upper Cover Switch Detects whether the rear upper cover is open or
closed.
9 Rear Lower Cover Switch Detects whether the rear lower cover is open or
closed.
16 Registration Sensor Detects when paper reaches the registration roller.
19 Fusing Exit Sensor Detects when the paper feeds out of the printer.
22 Toner End Sensor Detects when the toner has run out.

30 November, 1999 COMPONENT LAYOUT
1-11
Overall
Information
4. Interlock Switches
No Name Description
12
13
Interlock Switches If the fusing unit cover and/or top cover are open,
these 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
10 Paper Feed Clutch Transfers drive from the paper feed motor to the paper
feed roller.
14 Monitor Speaker Allows the user to hear the telephone line condition.
17 Fusing Lamp The heat from this lamp fuses the toner to the paper.
18 Thermistor Monitors the temperature on the hot roller surface.
20 Thermostat Interrupts the ac power supply for the fusing lamp if
the thermostat temperature exceeds 400°C.

COMPONENT LAYOUT 30 November, 1999
1-12
6. Optional Paper Feed Unit
No Name Description
1 Paper End Sensor
(Paper Feed Unit) This detects when the paper in the cassette has run out.
2Paper Feed Roller
(Paper Feed Unit) Picks up the top sheet of paper from the stack in the cassette, and feeds it into the printer.
3 Paper Feed Clutch
(Paper Feed Unit) Transfers drive from the paper feed motor in the mainframe to the paper feed roller in the cassette.
4Cassette Switch
(Paper Feed Unit) This detects whether the cassette is installed or not.
5 Rear Cover Switch
(Paper Feed Unit) This detects whether the rear cover is open or close.
H545V504.WMF
12
4
3
5

30 November, 1999 OVERALL MACHINE CONTROL
1-13
Overall
Information
1.4 OVERALL MACHINE CONTROL
The FCU (Facsimile Control Unit) contains most of the logical components for
overall system control.
There are two CPUs in the machine: the main CPU (FCIP2) and the energy saver
CPU. Both of these are on the FCU. In energy saver mode, the main CPU switches
off and the energy saver CPU takes over.
NCU
Printer
Scanner
Operation
Panel
AFE
DRAM Flash
ROM
SRAM
Modem
FCIP2
Data &
Control
SYSTEM BUS
FCU
Energy
Saver
CPU
Control
IC Card
Interface
H545V530.WMF

VIDEO DATA PATH 30 November, 1999
1-14
1.5 VIDEO DATA PATH
1.5.1 TRANSMISSION
Immediate Transmission:
Scanned data from the contact image sensor passes to the DIP block in the FCIP2.
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 entering 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 of transmission, the DCR block decompresses the data from the
SAF memory, then compresses it again after handshaking with the other terminal is
complete. The compressed data then passes either to the FIFO memory or to the
ECM memory, before entering the telephone line through the modem.
Contact Image Sensor Assembly
FCU
To the network
LED
Original
Video
Processing
Memory FCIP2
DIP
DCR
Amplifier
MDM Amplifier
DATA/ADDRESS BUS
DRAM
Line Buffer
/FIFO
Memory
ECM/SAF
Memory
Attenuator
HIC
NCU
Image Sensor
H545V506.WMF