Ricoh fax2000 SPECIFICATIONS f2000t
SCHMIDT 1 TAIWAN
RICOH FAX2000L
SERVICE MANUAL
30 November, 1999
Subject to change
Important Safety Notices
H545R500.WMF
Laser Safety
WARNING FOR LASER UNIT
ø
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)
CAUTION
ø
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.
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
i
3. INSTALLA T ION...........................................................................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
ii
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
iii
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
iv
30 November, 1999 SPECIFICATIONS
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/m
Document Feed
Automatic feed, face down
ADF Capacity
30 sheets (using A4 size 70 g/m2 paper)
15 sheets (using B4 size 70 g/m2 paper)
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
2
)
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 ITUT #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]
Overall
Information
1-1
SPECIFICATIONS 30 November, 1999
Power Supply
110 ± 20 Vac, 60 ± 1 Hz
Power Consumption (Max)
Standby:
Transmit:
Receive:
Copying
Minimum 2 W; Normal 10 W
31 W
889 W
: 898 W
Operating Environment
Temperature:
Humidity:
15 - 25 °C
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.
1-2
30 November, 1999 FEATURES
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
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
Contrast O
Halftone (Basic & Error
diffusion)
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
O
Communication Features - Auto
Resolutions available for
reception
Fine
Super fine
Substitute reception O
V.34 communication O
Communication Features -
X
Action as a transfer
broadcaster
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)
Broadcasting O
Chain dialing O
Communication result
display
Confidential ID override X
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
User Selectable
X
X
X
O
X
Overall
Information
1-3
FEATURES 30 November, 1999
Communication Features -
User Selectable
Parallel memory
transmission
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
PWD (tx only) O
Quick dial (30 stations) O
Reception modes (Fax, Tel,
O
Auto)
Remote control features X
Remote transfer X
Restricted access X
Secured polling reception X
Secured polling reception
with Stored ID override
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)
Turnaround polling X
Two-step transfer X
Two in one X
Voice request (immediate TX
only)
Communication Features -
Service Selectable
AI short protocol O
Auto-reduction override
O
option
Busy tone detection O
Cable equalizer O
Closed network (TX and RX) X
Communication Features -
Service Selectable
X
Continuous polling reception X
Dedicated TX parameters O
ECM O
EFC X
Inch-mm conversion X
Page retransmissi o n ti me s O
Protection against bad
X
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
X
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
O
and standby mode)
File retention time X
X
File retransmission X
Function programs O
ID code X
Label insertion ("From xxx") O
Language selection O
X
LCD contrast control
X
Memory lock X
Modifying a memory file X
Multi-sort document
X
reception
Multi-copy mode (up to 99) O
Own telephone number O
PC scanner X
PC fax X
PC print X
Print density control X
1-4
30 November, 1999 FEATURES
Other User Features
Printing a memory file O
Quick dial label printing O
RDS on/off O
Reception mode switching
X
timer
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 - Auto ma tic
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
O
numbers list
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
Overall
Information
1-5
FEATURES 30 November, 1999
Service Mode Features
System parameter list O
Technical data on the
Journal
Thermal head parameters X
O
Memory Files
Maximum number of files: 100
Maximum number of stations/file: 100
Maximum number of stations: 200
1-6
30 November, 1999 COMPONENT LAYOUT
1.3 COMPONENT LAYOUT
1.3.1 MECHANICAL COMPONENTS
1 52 3 4 6 8
18
17
7
Overall
Information
16
H545V501.WMF
12
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
6 Pressure Plate Applies pressure against the pick-up roller.
7 All-in-One Cartridge Consists of the toner cartridge, cleaning unit, used
8 Laser Unit
9 Paper Feed Roller
10 Separation Pad Allows one sheet of paper into the printer.
11 Registration Roller Car r ies out the registration process.
12 OPC Drum The latent image is written to this organic
Picks up document pages from the document table
one at a time.
toner tank, charge brush roller, application roller,
development roller and OPC drum.
Consists of the LDDR (Laser Diode Driver), focusing
lens, hexagonal mirror motor, and other laser optic
components.
Picks up the top sheet of paper from the stack in the
cassette, and feeds it into the printer.
photoconductor drum.
11131415
9
10
1-7
COMPONENT LAYOUT 30 November, 1999
No Name Description
13 Transfer Roller
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
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
Applies a charge to the paper to pull the toner off the
drum and onto the copy paper.
process.
the hot roller.
1-8
30 November, 1999 COMPONENT LAYOUT
1.3.2 ELECTRICAL COMPONENTS
22
21
20
19
1 2 3 4
H545V502.WMF
141618
17
15
23
5
6
Overall
Information
7
8
9
10
11
12
13
26
27
24
25
H545V509.WMF
1-9
COMPONENT LAYOUT 30 November, 1999
1. PCBs
No Name Description
CIS (Contact Image
2
Sensor)
5 LDDR (Laser Diode
Driver)
23 NCU (Network Control
Unit)
24 OPU (Operation Panel
Unit)
25 FCU (Facsimile Control
Unit)
26 Power Pack
27 PSU
(Power Supply Unit)
This sensor reads and converts the light reflected from
the document into an analog video signal.
This board drives the laser diode.
This board contains relays and switches for interfacing
the machine with the network and the handset.
This board controls the operation panel.
This board controls the machine. It contains the main
CPU, flash ROM, system RAM, etc.
Supplies high voltage to the charge brush roller,
transfer roller and development rollers.
This board supplies power to the machine, and
switches the fusing lamp on/off.
2. Motors
No Name Description
4 Polygon Mirror Motor
7 Main Motor This stepper motor drives the All-in-One cartridge and
11 Paper Feed Motor This stepper motor drives the registration roller and
15 Scanner Motor This stepper motor drives the scanner.
21 Cooling Fan Motor Cools the interior of the machine.
This high-speed dc motor drives the hexagonal mirror
in the laser printer optics.
the fusing unit.
the paper feed mechanisms in the cassettes.
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.
1-10
30 November, 1999 COMPONENT LAYOUT
4. Interlock Switches
No Name Description
Interlock Switches
12
13
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.
Overall
Information
1-11
COMPONENT LAYOUT 30 November, 1999
6. Optional Paper Feed Unit
1
2
5
H545V504.WMF
4
No Name Description
1 Paper End Sensor
(Paper Feed Unit)
Paper Feed Roller
2
(Paper Feed Unit)
3 Paper Feed Clutch
(Paper Feed Unit)
Cassette Switch
4
(Paper Feed Unit)
5 Rear Cover Switch
(Paper Feed Unit)
This detects when the paper in the cassette has run
out.
Picks up the top sheet of paper from the stack in the
cassette, and feeds it into the printer.
Transfers drive from the paper feed motor in the
mainframe to the paper feed roller in the cassette.
This detects whether the cassette is installed or not.
This detects whether the rear cover is open or close.
3
1-12
30 November, 1999 OVERALL MACHINE CONTROL
1.4 OVERALL MACHINE CONTROL
IC Card
Interface
SYSTEM BUS
Printer
Scanner
H545V530.WMF
FCU
DRAM
SRAM
AFE
NCU
Flash
ROM
Modem
Energy
Saver
CPU
Control
FCIP2
Data &
Control
Operation
Panel
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.
Overall
Information
1-13
VIDEO DATA PATH 30 November, 1999
1.5 VIDEO DATA PATH
1.5.1 TRANSMISSION
Original
Contact Image Sensor Assembly
LED
Image Sensor
Amplifier
Video
Processing
Memory
DATA/ADDRESS BUS
Line Buffer
/FIFO
Memory
DIP
FCIP2
DCR
DRAM
ECM/SAF
Memory
MDM Amplifier
Attenuator
HIC
NCU
To the network
H545V506.WMF
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.
FCU
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.
1-14
30 November, 1999 VIDEO DATA PATH
1.5.2 RECEPTION
From the Network
NCU
HIC
Amplifier
MDM
FCIP2
DCR LIF
MDM: Modem
DCR: Data Compression and Reduction
LIF: Laser Interface
FCU
Overall
Information
Data/ Address Bus
LDDR
Line Buffer
/FIFO
Memory
ECM/SAF
Memory
DRAM
Page
Memory
Copy Paper
H545V507.WMF
Data from the line passes to the modem through the NCU and hybrid integra ted
circuit (HIC). After the modem demodulates the data, it passes through either the
FIFO or the ECM memory to the DCR block, which decompresses it into raster
image data. At the same time, the compressed data passes to the SAF memory as
a backup in case of mechanical problems during printing (this is known as
substitute reception).
The raster image data then passes 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.
1-15
VIDEO DATA PATH 30 November, 1999
1.5.3 COPYING
Original
Contact Image Sensor Assembly
Video
Processing
Memory
Line Buffer
/FIFO
Memory
LED
Amplifier
FCIP2
DCR LIF
DATA/ADDRESS BUS
ECM/SAF
Memory
DRAM
Image Sensor
DIP
Memory
Page
FCU
LDDR
Copy Paper
H545V508.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 decomp ression, and then it passes to the
page memory for printing.
1-16
30 November, 1999 POWER DISTRIBUTION
1.6 POWER DISTRIBUTION
1.6.1 DISTRIBUTION DIAGRAM
Paper Feed
AC
Main
Power
AC Switching
Circuit
Fusing Lamp
ON/OFF
Switching
Circuit
AC115V or
Fusing Lamp
230V
Main Switch
PSU
24VIN
+24V
-9V
24VM
24VD
IC
Card
+5VD
+5V
+5VP
DC-DC
Converter
DC-DC
Converter
Interlock
Switch
Unit
+5V
Polygon
Motor
+24VM
+24VM
-9V
+12V
+5V
+5VE
+5VLD+5V
+5VLD
+24V
+5V
LDDR Image Sensor
Main
Motor
+24VMM
DC-DC
Converter
+5VEE
NCU
+5V
Paper Feed
Clutch
+24VMS
+24VM
-9VV
+5VV
FCU
+24VMM
+24VM
+24VPP
+5VT
+5V
+5VOPP
+5VE
+24VMM
+24V
Paper Feed
Motor
Fusing Fan
Power Pack
Thermistor
Sensors
Operation Panel
Scanner Motor
Toner End
Sensor
+5V
-9V
Overall
Information
H545V531.WMF
The PSU supplies +24V dc power to the FCU. The FCU converts the +24V into the
following supplies:
+5V Normally on when the main switch is.
+5VE Detects an activation signal from the NCU, document feeder, or operation panel
when the machine is in energy saving mode.
+5VT For the thermistor.
+5VLD
+5VV This is a more stable power supply than +5V. It is used for the contact image
+5VD Supplies back up power for the DRAM and the optional IC card on the FCU. It can
+5VBAT Supplies back up power to the system RAM on the FCU to back up the
+24V Normally on when the main switch is.
+24VD This is interrupted if the fusing unit cover interlock switch opens.
+24VIN Supplies +24V to the fusing unit on/off switching circuit. It is interrupted if the fusing
+24VMM For the scanner, paper feed, and main motors.
+24VPP For the power pack.
-9V For the image sensor.
+5VP For the optional IC card.
Supplies the laser diode. It is interrupted if the fusing unit cover interlock switch
opens.
sensor.
back up stored data for one hour after the power is switched off. A rechargeable
battery on the FCU generates +5VD.
programmed data. A lithium battery generates +5VBAT.
unit cover interlock switch opens.
1-17
POWER DISTRIBUTION 30 November, 1999
1.6.2 MEMORY BACK-UP CIRCUIT
FCU
+5V
POWERS
+5VD
5RTCCS
FCIP2
1VDET
1SAFFG
DRAM
[A]
IC Card
+
-
Switching
Circuit
+5VBAT
System
RAM
+5VBAT+5VD
H545V513.WMF
[B]
+5VE
DC/DC
Converter
+5V
Q29
The +5VBAT supply from the lithium battery [A] backs up the system RAM, which
contains system parameters, programmed telephone numbers, and the real time
clock in the main CPU. The 5RTCCS signal tells the main CPU whether the backup 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 FCU 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 5 or 6 days.
The battery [B] generates about 3 volts (max. 3.2 volts). The DC/DC converter
raises this voltage to 5 volts so it can be used as the +5VD supply for the SAF
backup. The CPU monitors the voltage of the +5VD supply with the 1VDET signal.
When the ba ttery 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.
NOTE:
There is no battery switch for the battery [B].
1-18
30 November, 1999 SCANNER
2. DETAILED SECTION DESCRIPTIONS
2.1 SCANNER
2.1.1 MECHANISMS
1. Document Detection
[A]
[B]
H545D002.WMF
The document sensor [A] detects a document when it is placed in the ADF.
The document width sensor [B] detects if the document is A4 or B4 width.
2. Pick-up and Separation and Drive Mechanism
[A]
[B]
[D]
[C]
Detailed
Descriptions
[F]
[G]
[E]
H545D502.WMF
The pressure plate [A] aligns the leading edges of the pages of the document.
When the machine starts feeding the document, the mechanical clutch in the ADF
roller unit lifts up the pick-up rollers [B] to feed the bottom sheet of the document.
Then, the feed belt [C] feeds the sheet into the scanner.
The separation roller [D] prevents the feed belt from feeding more than one sheet
at a time.
The scanner motor [E] drives the pick-up rollers [B], feed belt [C], R1 roller [F], and
R2 roller [G].
Cross Reference
ADF mechanical clutch mechanism: Group 3 Facsimile Manual, page 2-2-8.
Maximum document length: Scanner Switch 00, bits 2 and 3.
2-1
SCANNER 30 November, 1999
4. Image Scanning
[A]
[B]
[C]
H545D503.WMF
The image sensor [B] consists of a row of photosensitive elements (B4 width x 8
dots/mm). The document reflects light from the LED array and the rod lens array
focuses it onto the image sensor. Because of the short optical path inside the CIS,
the focal depth is much shorter than for a CCD type scanner. Consequently, the
spring plates [C] push the white roller [A] so that the document surface always
touches the exposure glass at the scan line.
The image sensor assembly is factory adjusted, so it does not require adjustment
or replacement in the field.
The image sensor scans the original one line at a time, and outputs an analog
signal for each line. The voltage from each element depends on the intensity of the
light reflected from the original onto the element; the light intensity depends on the
darkness of the document area it was reflected from.
The white roller [A] must be kept clean, because the machine scans it every page
to calibrate the white level (auto shading).
2-2
30 November, 1999 SCANNER
2.1.2 JAM CONDITIONS
The main CPU detects a document jam if one of the following conditions occurs.
Jam Condition Description
Non-feed The feed mechanism attempts to feed the
paper once every second for a maximum of
6 seconds. If the scan line sensor does not
detect the document within 6 seconds, the
monitor displays an error message.
Incorrect sensor
conditions
Maximum document length
exceeded
Cover open While the ADF is working, the ADF cover is
Error during feed-out
The scan line sensor turns on while the
document sensor is off.
The scan line sensor does not turn off after
the maximum document length has fed
through it. This occurs after 11 seconds at
standard resolution for memory TX; 23
seconds at standard resolution for
immediate TX or detail resolution; or 46
seconds at fine resolution (all these times
are for a 1.2-m long document).
opened.
The scanner motor reverses when the final
page of the document feeds out of the
scanner and/or when removing a jammed
document. This error occurs when placing a
document into the feeder while the motor is
rotating.
Error
Code
1-00
Detailed
Descriptions
1-01
No error
code
No error
code
2-3
PRINTING 30 November, 1999
2.2 PRINTING
2.2.1 PRINTING PROCESS - OVERVIEW
-1.2kV
-200V
µµµµ
A
+4.3
-650V
(0V)
H545D521.WMF
This machine uses a “write-to-black” system, with negative toner.
•
The charge-brush roller gives the drum surface an approximate negative
charge of -750 V.
•
The exposed area on the drum drops to about -200 V.
•
The development roller carries toner to the latent image on the drum surface.
The bias voltages during printing:
Toner application roller : -650 V
Development roller: -400 V
•
The transfer roller pulls the toner from the drum onto the paper.
A constant current of +4.3 µA is applied. The anti-static brush helps to
separate the paper from the drum.
•
The cleaning blade removes any toner remaining on the drum after the image
transfers to the paper.
•
This machine does not use quenching lamp.
2-4
30 November, 1999 PRINTING
2.2.2 OPC DRUM
[C]
[D]
[B]
[A]
[E]
H545D504.WMF
The cartridge contains an organic photo-conductor drum [A]. The diameter of the
drum is 24 mm. The main motor [B] drives it through a gear train. The same gear
train also drives the toner application roller [C], development roller [D], and transfer
roller [E].
The drum, development roller, fresh and used toner tanks, and cleaning
mechanism are all included in the cartridge, which is known as the “All-in-One”
cartridge.
Detailed
Descriptions
2.2.3 CHARGE
[A]
H545D517.WMF
The cartridge contains a charge brush roller [A]. The diameter of the roller is 12
mm. The charge brush roller does not generate ozone. The power pack applies a
constant voltage of about –1.2 kV. The charge brush roller gives the drum surface
a negative charge (-750V).
2-5
PRINTING 30 November, 1999
2.2.4 LASER EXPOSURE
Overview
[C]
[E]
[A]
[B]
H545D505.WMF
•
The focusing lens [A] is a double toroidal lens that has a barrel toroidal
[D]
[F]
surface on both sides.
•
The shield glass [B] prevents toner and dust from entering the laser optics
area.
•
The speed of the hexagonal mirror motor [C] is 5793.88 rpm
(16 x 15.4 dots/mm).
•
The strength of the beam emitted from the LD unit [D] is 0.2 mW with a
wavelength of 780 nm. The photo transistor [E] inside the LD unit
synchronizes the laser main scan.
•
The mirror [F] reflects the laser beam onto the drum.
The charge on the exposed areas of the drum drops to about -200V while nonexposed areas remain at around -750V.
As a mechanical safety feature, a shutter slides to block the laser beam path
whenever the upper unit is opened.
Cross Reference
Group 3 Facsimile Manual: section 4-3-3
2-6
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