Ricoh Fx880 User manual

IFO
RICOH FAX880 MP
MV 74
SERVICE MANUAL
November 28th, 1995
Subject to change
Printed in Japan

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.
Important:
Before servicing this machine, please read the following notes.
•Do not touch the nozzle section in the ink cartridge. This helps prevent
the nozzles from clogging.
•Do not touch the wiper blade on the purge unit. This also helps prevent
the nozzles from clogging. (Please refer to section 2.2 for details.)
•Do not touch the aluminum plate on the ink cartridge. The aluminum
plate heats up during printing. It becomes quite hot during continuous
high duty printing.
•After repairs or maintenance, excessive ink may remain on the contact
section of the cartridge, covers, and TIJ unit. Remove this ink with a dry
cloth. The ink is electrically conductive and it may short an electrical
component.
•Always store an extra cartridge (if unpacked) in the cartridge box in-
cluded with the machine.
•Ensure that the TIJ unit has completed its cleaning operation before un-
plugging the machine.
•Ensure that the carriage is at the head capping position (home position)
before leaving the machine unplugged for long periods.

Table of Contents
1. OVERALL MACHINE INFORMATION
1.1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . 1-1
1.2. FEATURES . . . . . . . . . . . . . . . . . . . . . 1-2
1.3. COMPONENT LAYOUT . . . . . . . . . . . . . . . . 1-5
1.3.1. Mechanical Components . . . . . . . . . . . . . . 1-5
1.3.2. Electrical Components . . . . . . . . . . . . . . . 1-6
1. PCBs . . . . . . . . . . . . . . . . . . . . . . 1-6
2. Motors . . . . . . . . . . . . . . . . . . . . . . 1-7
3. Sensors . . . . . . . . . . . . . . . . . . . . . 1-7
1.4. OVERALL MACHINE CONTROL . . . . . . . . . . . . 1-8
1.5. VIDEO DATA PATH . . . . . . . . . . . . . . . . . . 1-10
1.5.1. Transmission . . . . . . . . . . . . . . . . . . . 1-10
1.5.2. Reception . . . . . . . . . . . . . . . . . . . . 1-11
1.5.3. Copying . . . . . . . . . . . . . . . . . . . . . 1-12
1.5.4. Printing from the Centronics Interface . . . . . . . . . 1-13
1.6. POWER DISTRIBUTION . . . . . . . . . . . . . . . . 1-14
1.6.1. Distribution Diagram . . . . . . . . . . . . . . . . 1-14
1.6.2. Memory Back-up Circuit . . . . . . . . . . . . . . 1-15
2. DETAILED SECTION DESCRIPTIONS
2.1. SCANNER . . . . . . . . . . . . . . . . . . . . . 2-1
2.1.1. Mechanisms . . . . . . . . . . . . . . . . . . . 2-1
1. Document Detection, Pick-up and Separation and
Drive Mechanism . . . . . . . . . . . . . . . . . 2-1
2.1.2. Image Scanning . . . . . . . . . . . . . . . . . 2-2
2.2. PRINTER . . . . . . . . . . . . . . . . . . . . . . 2-4
2.2.1. Printer Configuration . . . . . . . . . . . . . . . . 2-4
2.2.2. Ink Cartridge (Black and Color) . . . . . . . . . . . . 2-5
2.2.3. Printer Head . . . . . . . . . . . . . . . . . . . 2-6
1. Mechanism . . . . . . . . . . . . . . . . . . . . 2-6
2. Drive Circuitry . . . . . . . . . . . . . . . . . . . 2-7
3. Print Signals . . . . . . . . . . . . . . . . . . . 2-8
2.2.4. Purge Unit . . . . . . . . . . . . . . . . . . . . 2-9
1. Components . . . . . . . . . . . . . . . . . . . 2-9
2. Purge Unit Functions . . . . . . . . . . . . . . . . 2-10
2.2.5. Paper Feed . . . . . . . . . . . . . . . . . . . 2-11
1. Overview . . . . . . . . . . . . . . . . . . . . . 2-11
2. Drive Mechanism . . . . . . . . . . . . . . . . . 2-12
2.2.6. Ink End Detection . . . . . . . . . . . . . . . . . 2-13
2.2.7. Maximum Print Lengths . . . . . . . . . . . . . . 2-14

2.2.8. Data Reduction and Page Separation . . . . . . . . . 2-15
2.3. PCBs . . . . . . . . . . . . . . . . . . . . . . . 2-16
2.3.1. FCE . . . . . . . . . . . . . . . . . . . . . . 2-16
1. FCIP (Facsimile Controller and Image Processor) . . . . . 2-16
2. ROM . . . . . . . . . . . . . . . . . . . . . . 2-16
3. DRAM . . . . . . . . . . . . . . . . . . . . . . 2-17
4. SRAM . . . . . . . . . . . . . . . . . . . . . . 2-17
5. Video SRAM . . . . . . . . . . . . . . . . . . . 2-17
6. Oscillators . . . . . . . . . . . . . . . . . . . . 2-17
7. Jumpers, Switches, and Test Points . . . . . . . . . . 2-17
2.3.2. FDU . . . . . . . . . . . . . . . . . . . . . . 2-18
1. Printer Head Drive Circuit . . . . . . . . . . . . . . 2-18
2. Drivers . . . . . . . . . . . . . . . . . . . . . . 2-18
3. Sensors . . . . . . . . . . . . . . . . . . . . . 2-18
4. DC/DC Converter . . . . . . . . . . . . . . . . . 2-19
5. Battery . . . . . . . . . . . . . . . . . . . . . . 2-19
6. Jumpers, Switches, and Test Points . . . . . . . . . . 2-19
2.3.3. IJC . . . . . . . . . . . . . . . . . . . . . . . 2-20
1. CPU (MPU) . . . . . . . . . . . . . . . . . . . . 2-20
2. Printer controller . . . . . . . . . . . . . . . . . . 2-20
3. ROM . . . . . . . . . . . . . . . . . . . . . . 2-20
4. DRAM . . . . . . . . . . . . . . . . . . . . . . 2-20
5. Oscillators . . . . . . . . . . . . . . . . . . . . 2-21
6. Raster Image Data Controller (RIDC2) . . . . . . . . . 2-21
7. SRAM . . . . . . . . . . . . . . . . . . . . . . 2-21
8. HIC (Hybrid IC) . . . . . . . . . . . . . . . . . . 2-21
9. EEPROM . . . . . . . . . . . . . . . . . . . . . 2-21
10. Centronics Interface . . . . . . . . . . . . . . . . 2-21
11. Jumpers, Switches, and Test Points . . . . . . . . . . 2-21
2.3.4. PSU . . . . . . . . . . . . . . . . . . . . . . 2-22
2.3.5. NCU (USA) . . . . . . . . . . . . . . . . . . . 2-23
1. Jumpers . . . . . . . . . . . . . . . . . . . . . 2-23
2.3.6. NCU (Europe/Asia) . . . . . . . . . . . . . . . . 2-24
1. Control Signals and Jumpers . . . . . . . . . . . . . 2-24
3. INSTALLATION
3.1. INSTALLING THE MACHINE . . . . . . . . . . . . . . 3-1
3.2. INITIAL PROGRAMMING . . . . . . . . . . . . . . . 3-1
4. SERVICE TABLES AND PROCEDURES
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. Protocol Dump (Function 05) . . . . . . . . . . . . 4-3
4.1.6. RAM Display/Rewrite (Function 06) . . . . . . . . . . 4-3
4.1.7. RAM Dump (Function 06) . . . . . . . . . . . . . . 4-4
4.1.8. Counter Display/Rewrite (Function 07) . . . . . . . . . 4-4
4.1.9. NCU Parameters (Function 08) . . . . . . . . . . . . 4-5
4.1.10. Modem Test (Function 08) . . . . . . . . . . . . . 4-5
4.1.11. DTMF Tone Test (Function 08) . . . . . . . . . . . 4-6
4.1.12. Modem Detection Test (Function 08) . . . . . . . . . 4-7
4.1.13. Operation Panel Test (Function 09) . . . . . . . . . 4-7
4.1.14. LED Array Test (Function 10) . . . . . . . . . . . . 4-8
4.1.15. ADF Test (Function 10) . . . . . . . . . . . . . . 4-8
4.1.16. Printer Test Patterns (Function 11) . . . . . . . . . . 4-9
4.1.17. Printing the EEPROM Information Sheet and Initializing
the EEPROM (Function 11) . . . . . . . . . . . . . 4-10
4.1.18. Printer Mechanism Test - Free Run (Function 11) . . . . 4-11
4.1.19. Ink End Sensor Initialization (Function 11) . . . . . . . 4-12
4.1.20. RAM Tests (Function 12) . . . . . . . . . . . . . . 4-12
4.1.21. Software Download (Function 12) . . . . . . . . . . 4-13
4.1.22. Software Upload (Function 12) . . . . . . . . . . . 4-14
4.1.23. SRAM Data Download (Function 12) . . . . . . . . . 4-15
4.1.24. Serial Number (Function 14) . . . . . . . . . . . . 4-16
4.1.25. Service Station Fax Number (Function 13) . . . . . . . 4-16
4.2. BIT SWITCHES . . . . . . . . . . . . . . . . . . . 4-17
4.2.1. System Switches . . . . . . . . . . . . . . . . . 4-17
4.2.2. Scanner Switches . . . . . . . . . . . . . . . . 4-25
4.2.3. Printer Switches . . . . . . . . . . . . . . . . . 4-27
4.2.4. Communication Switches . . . . . . . . . . . . . . 4-28
4.2.5. G3 Switches . . . . . . . . . . . . . . . . . . . 4-34
4.3. NCU PARAMETERS . . . . . . . . . . . . . . . . . 4-39
4.4. DEDICATED TRANSMISSION PARAMETERS . . . . . . . 4-65
4.4.1. Programming Procedure . . . . . . . . . . . . . . 4-65
4.4.2. Parameters . . . . . . . . . . . . . . . . . . . 4-66
4.5. SERVICE RAM ADDRESSES . . . . . . . . . . . . . . 4-68
4.6. SPECIAL TOOLS AND LUBRICANTS . . . . . . . . . . 4-79
5. REMOVAL AND ADJUSTMENT
5.1. COVERS . . . . . . . . . . . . . . . . . . . . . . 5-1
5.1.1. Operation Panel Assembly [A and B] . . . . . . . . . 5-1
5.1.2. Upper Cover [A] and IC Card Cover [B] . . . . . . . . 5-2
5.2. Paper Feed Unit and Roller Assembly . . . . . . . . . . 5-2
5.2.1. Paper Feed Unit [A] . . . . . . . . . . . . . . . . 5-2
5.2.2. Paper Feed Roller Assembly [A] . . . . . . . . . . . 5-3
5.3. PCBs . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.3.1. PSU [A] . . . . . . . . . . . . . . . . . . . . . 5-3
5.3.2. IJC [A] . . . . . . . . . . . . . . . . . . . . . 5-4
5.3.3. FDU [A] . . . . . . . . . . . . . . . . . . . . . 5-5
5.3.4. NCU [A] . . . . . . . . . . . . . . . . . . . . . 5-5
5.4. SCANNER . . . . . . . . . . . . . . . . . . . . . 5-6
5.4.1. Contact Image Sensor [A] . . . . . . . . . . . . . . 5-6
5.4.2. Scanner Rollers [A, B, C] . . . . . . . . . . . . . . 5-6
5.5. PRINTER . . . . . . . . . . . . . . . . . . . . . . 5-7
5.5.1. Chassis [C] . . . . . . . . . . . . . . . . . . . 5-7
5.5.2. Thermal Ink Jet (TIJ) Unit [A] and Paper Output Guide [B] . 5-8
5.5.3. Purge Unit . . . . . . . . . . . . . . . . . . . . 5-8
5.5.4. Ink Absorbers . . . . . . . . . . . . . . . . . . 5-9
6. TROUBLESHOOTING
6.1. COPY QUALITY TROUBLESHOOTING . . . . . . . . . . 6-1
6.1.1. Blank Copies . . . . . . . . . . . . . . . . . . . 6-2
6.1.2. Black Copies . . . . . . . . . . . . . . . . . . . 6-3
6.1.3. Dirty Background . . . . . . . . . . . . . . . . . 6-3
6.1.4. Uneven Image Density . . . . . . . . . . . . . . . 6-3
6.1.5. Vertical Black Lines . . . . . . . . . . . . . . . . 6-4
6.1.6. Vertical White Lines . . . . . . . . . . . . . . . . 6-5
6.1.7. Horizontal White Lines . . . . . . . . . . . . . . . 6-6
6.1.8. Faint Copies . . . . . . . . . . . . . . . . . . . 6-7
6.1.9. Misaligned Output (Data shifted to the right or left) . . . . 6-8
6.1.10. Replace Cartridge Still Displayed
After Cartridge Replacement . . . . . . . . . . . . 6-8
6.2. MECHANICAL PROBLEMS . . . . . . . . . . . . . . 6-9
6.2.1. ADF/Scanner . . . . . . . . . . . . . . . . . . . 6-9
1. Non-feed . . . . . . . . . . . . . . . . . . . . . 6-9
2. Jam . . . . . . . . . . . . . . . . . . . . . . . 6-10
3. Skew . . . . . . . . . . . . . . . . . . . . . . 6-11
4. Multi-feed . . . . . . . . . . . . . . . . . . . . 6-11
6.2.2. Printer . . . . . . . . . . . . . . . . . . . . . 6-12
1. Non-feed . . . . . . . . . . . . . . . . . . . . . 6-12
2. Paper Jam . . . . . . . . . . . . . . . . . . . . 6-12
3. Skew . . . . . . . . . . . . . . . . . . . . . . 6-13
4. Multi-feed . . . . . . . . . . . . . . . . . . . . 6-13
6.3. SERVICE CALL CONDITIONS . . . . . . . . . . . . . 6-14
6.4. ERROR CODES . . . . . . . . . . . . . . . . . . . 6-15
6.5. ELECTRICAL COMPONENT DEFECTS . . . . . . . . . 6-21
6.5.1. Defective Sensor Table . . . . . . . . . . . . . . . 6-21
6.5.2. Blown Fuse Table . . . . . . . . . . . . . . . . . 6-21

1. OVERALL MACHINE INFORMATION
1.1. SPECIFICATIONS
Type
Desktop type transceiver
Circuit
PSTN, PABX
Connection
Direct couple
Document Size
Length: 105 - 600 mm [4.1 - 23.6 ins]
Width: 148 - 220 mm [5.8 - 8.7 ins]
Thickness: 0.05 to 0.15 mm [2 to 6 mils]
(equivalent to 50 - 80 g/m2)
Document Feed
Automatic feed, face down
ADF Capacity
15 sheets (using 20 lb. or 80 g/m2paper)
Scanning Method
Contact image sensor
Maximum Scan Width
216 mm [8.5 ins]
Scan Resolutions
Main scan: 8 dots/mm [203 dpi]
Sub scan:
Standard - 3.85 lines/mm [98 lpi]
Detail - 7.7 lines/mm [196 lpi]
Fine - 15.4 lines/mm [391 lpi]
Memory Capacity
ECM: 64 kbytes (single buffer) for tx
SAF: 400 kbytes
(272 kbytes for tx)
Compression
MH, MR, EFC, MMR, SSC (MMR only with
ECM)
Protocol
Group 3 with ECM
Modulation
V.29 (QAM), V.27ter (PHM), V.21 (FM)
Data Rate (bps)
9600/7200/4800/2400, Automatic fallback
Transmission Time
9 s at 9600 bps; Measured with G3 ECM us-
ing memory for a ITU-T #1 test document
(Slerexe letter) at standard resolution
Printing System
Ink jet printing
Paper Size
Europe/Asia: A4
USA: Letter, Legal
Paper Capacity
150 sheets
Maximum Printing Width
203 mm [8.0 ins]
Maximum Printer Resolutions
Main scan: 360 dpi
(720 dpi in the printer mode)
Sub scan: 360 dpi
Power Supply
Europe/Asia: 220 - 240 Vac, 50 ±3 Hz
USA: 115 ±20 Vac, 60 ±3 Hz
Power Consumption
Standby: 5 W Transmit: 12 W
Receive: 14 W Copying: 24 W
Printer: 19 W
Operating Environment
Temperature: 17 - 28 °C [63 - 82 °F]
Humidity: 40 - 70 %Rh
Dimensions (W x D x H)
370 x 280 x 235 mm [14.6 x 11.0 x 9.3 ins]
Excluding handset, trays, and tables
Weight
Approx. 7 kg [15 lbs]
November 28th, 1995 OVERALL MACHINE INFORMATION
SPECIFICATIONS
1-1

1.2. FEATURES
KEY: O = Used, X = Not Used,
A = With optional memory only
B = With optional handset only
C = With color cartridge only
Equipment
ADF O
Book scan X
Built-in handset X
Bypass feed X
Optional cassette X
Cabinet X
Counter X
Cutter X
Handset (option) B
Hard disk X
Manual feed mechanism X
Marker (Stamp) X
Monitor speaker O
PC printer interface (IBM) O
Video Processing Features
Contrast X
Halftone (Basic & Error Diffusion) O
MTF O
Reduction X
Resolution O
Communication Features - Auto
Automatic fallback O
Automatic redialing O
Confidential reception A
Dual Access O
Substitute reception O
Communication Features -
User Selectable
Action as a transfer broadcaster X
AI Redial (last ten numbers) X
Answering machine interface O
Authorized Reception O
Auto-answer delay time X
Auto dialing (pulse or DTMF) O
Auto Document X
Communication Features -
User Selectable
Auto image density selection X
Auto paper size selection X
Automatic Voice Message X
Batch Transmission
(max 35 files) A
Broadcasting O
Chain Dialing O
Communication Result Display X
Confidential ID Override O
Confidential Transmission O
Direct Fax Number Entry O
Economy Transmission X
Fax on demand X
Forwarding A
Free Polling O
Groups (3 groups) O
Group Transfer Station X
Hold X
ID Transmission O
Immediate Redialing O
Immediate transmission O
Keystroke Programs O
Memory transmission O
Multi-step Transfer X
Next Transfer Station X
OMR X
On Hook Dial O
Ordering Toner X
Page Count O
Personal Codes X
Personal Codes with Conf. ID X
Polling Reception O
Polling Transmission O
Polling tx file lifetime in the SAF O
Quick Dial (10 stations) O
Reception modes (Auto, Tel,
TAM) O
Length Reduction (in Rx mode,
called Auto Reduction) O
Remote control features X
Remote Transfer X
Restricted Access X
Secured Polling O
OVERALL MACHINE INFORMATION November 28th, 1995
FEATURES
1-2

Communication Features -
User Selectable
Secured Polling with Stored ID
Override O
Secure Transmission X
Send Later O
Silent ringing detection X
Specified Image Area X
Speed Dial (50 stations) O
Super Fine Resolution
(16 x15.4 l/mm : 400 x 400 dpi) X
Telephone Directory X
Tonal Signal Transmission O
Transfer Request X
Transmission Deadline (TRD) A
Turnaround Polling X
Two-step Transfer X
Two in one X
Voice Request (immed. tx only) X
Communication Features -
Service Selectable
AI Short Protocol O
Auto-reduction override option O
Busy tone detection O
Closed Network (tx and rx) O
Continuous Polling Reception X
Dedicated tx parameters O
ECM O
EFC O
Inch-mm conversion X
Page retransmission: no. of
times O
Page separation mark O
Protection against wrong conn. O
Resol’n stepdown override option X
Short Preamble X
Well log X
Other User Features
Area code prefix X
Automatic service call X
Center mark X
Checkered mark X
Clearing a memory file O
Clearing a polling file O
Clock O
Other User Features
Confidential ID O
Copy editing (Erase Center/Mar-
gin) X
Copy mode O
Copy Mode Restriction X
Counters O
Daylight Saving Time X
Destination Check X
Direct entry of names O
File Retention Time X
File Retransmission X
Function Programs X
ID Code O
Label Insertion ("From xxx") X
Language Selection O
LCD contrast control X
Memory Lock A
Memory Lock ID A
Modifying a memory file X
Multi Sort Document Reception A
Multicopy mode O
Own telephone number X
Power Saver X
Print density control X
Printing a memory file O
RDS on/off O
Reception Mode Switching Timer X
Reception time printing X
Reduction/Enlargement X
Remaining memory indicator O
Remote ID X
Reverse Order Printing A
RTI, TTI, CSI O
Secure ID X
Service Report Transmission X
Speaker volume control O
Specified Cassette Selection X
Substitute reception on/off O
Telephone line type O
Toner Saving Mode X
TTI on/off O
User Function Keys X
User Parameters O
Wild Cards O
November 28th, 1995 OVERALL MACHINE INFORMATION
FEATURES
1-3

Reports - Automatic
Charge Control Report X
Communication Failure Report O
Confidential File Report A
Error Report O
Memory Storage Report O
Mode Change Report X
Polling Clear Report X
Polling Reserve Report O
Polling Result Report O
Power Failure Report O
TCR (Journal) O
Toner Cassette Order Form X
Transfer Result Report X
Transmission Result Report O
Reports - User-initiated
Authorized Reception List O
Charge Control Report X
File List O
Forwarding List A
Group List O
Personal Code List X
Program List O
Quick Dial List O
Specified Cassette Selection List X
Speed Dial List O
TCR O
Transmission Status Report X
User Function List X
User Parameter List O
Service Mode Features
Auto Paper Select test X
Back-to-back test O
Bit switch programming O
Book mode test X
Buzzer test O
Cable equalizer O
Comm. parameter display O
Counter check O
Country code O
DTMF tone test O
Echo countermeasure O
Effective term of service calls X
Error code display O
Excessive jam alarm X
Service Mode Features
File Transfer O
LCD contrast adjustment X
Line error mark O
Memory file printout
(substitute reception only) O
Modem test O
NCU parameters O
Operation panel test O
Periodic service call X
PM Call X
Printer mechanism test O
Printer test patterns O
Programmable attenuation X
Protocol dump list O
RAM display/rewrite O
RAM dump O
RAM test O
Ringer test X
Scanner lamp test O
Scanner mechanism test O
Sensor initialization X
Serial number O
Service monitor report O
Service station number O
Software upload/download
(Available only in machines with
the FLASH ROM.) O
SRAM data download O
System parameter list O
Technical data on the TCR O
Thermal head parameters X
Transmission Status Report X
User data transfer O
Memory Files
Max. number of files: 100
Max. number of stations/file: 100
OVERALL MACHINE INFORMATION November 28th, 1995
FEATURES
1-4

1.3. COMPONENT LAYOUT
1.3.1. Mechanical Components
No. Name Description
1TIJ Thermal ink jet printer unit.
2Document Feed Roller This roller feeds the document into the scanner.
3Paper Feed Unit This unit can hold up to 150 sheets.
4Paper Feed Roller This roller picks up the top sheet of paper, and feeds it
into the printer.
5Registration Roller This roller carries out the registration process.
6Carriage Unit / Ink
Cartridge The carriage unit holds the ink cartridge. The cartridge contains the ink jet printer head and the ink.
7R2 Roller This roller feeds the document through the scanner.
8R1 Roller This roller feeds the document through the scanner.
12
3
4
5
6
7
8
H505V501.wmf
November 28th, 1995 OVERALL MACHINE INFORMATION
COMPONENT LAYOUT
1-5

1.3.2. Electrical Components
1. PCBs
No. Name Description
1FDU (Facsimile Driver
Unit) This board contains drivers for the motors, a dc-dc converter, and the DRAM backup circuit.
2OPU (Operation Panel
Unit) This board controls the operation panel.
6IJC (Ink Jet Controller) This board controls the ink jet printer.
7FCE (Facsimile Control
Engine) This board controls the machine. It contains the main cpu, ROM, system RAM, and other control components.
9PSU (Power Supply Unit) This board supplies power to the machine.
10 NCU (Network Control
Unit) This board contains a relay and switches to interface the machine to the network.
15 Contact Image Sensor
Assembly This sensor reads and converts the light reflected from the document into an analog video signal. It uses an
RLA (Rod Lens Array) sensor unit.
1
2
567
8
9
10
11
12
13
14
15
18
19
34
16
17
H505V502.wmf
OVERALL MACHINE INFORMATION November 28th, 1995
COMPONENT LAYOUT
1-6

2. Motors
No. Name Description
8Tx Motor This stepper motor drives the scanner rollers.
12 Carriage Motor This motor drives the printer’s carriage mechanism.
18 Paper Feed Motor This motor drives the paper feed roller and the
registration roller.
3. Sensors
No. Name Description
3Scan Line Sensor This sensor detects when the document approaches
the scanning position.
4Document Sensor This sensor detects the presence of a document in the
feeder.
5Top Cover Sensor This sensor detects whether the top cover is opened or
closed.
11 Paper Release Lever
Sensor This sensor detects when the paper release lever is released. (The paper release lever is also known as the
paper feed lever.)
13 Carriage Home Position
Sensor This sensor detects when the carriage is at the home position.
14 Ink End Sensor This sensor detects when the ink in the cartridge has
run out.
16 Paper Feed Roller Sensor This sensor detects the initial rotation position of the
paper feed roller.
17 Paper End Sensor This sensor detects the presence of paper in the printer.
19 Front Cover Sensor This sensor detects whether the front cover is opened
or closed.
November 28th, 1995 OVERALL MACHINE INFORMATION
COMPONENT LAYOUT
1-7

1.4. OVERALL MACHINE CONTROL
The FCE (Facsimile Control Engine) contains the FCIP (Facsimile Control
and Image Processor), DRAM, SRAM, System ROM, and video processing
memory. It controls the entire system through the IJC (Ink Jet Controller) and
the FDU (Facsimile Driver Unit).
There are two cpus in the machine: the main cpu (FCIP) on the FCE and the
ink jet control cpu on the IJC.
The FCIP consists of the following component blocks:
•MDM - Modem•RU8 CPU - Main CPU •PRIF - Printer Interface•DMAC - DMAController •DCR - Data Compression and Recon-
struction
•DIP - Digital Image Processor
System
ROM
System
RAM
(SRAM)
DATA/ADDRESS BUS
Optional
RS232C I/F
Video
SRAM
CPU
RU8 DMAC DCR DIP LIF
Optional
IC Card
PRIF
RIDC SRAM
CPU
NCU
Ink End
Sensor
Contact Image
Sensor
Speaker
HIC
Cover
Sensors
Paper Feed
Roller Sensor
DRAM
MDM
FCIP
I/F
Controller
Print
Controller ROM
PSU
Tx Motor
Paper
Feed
Motor
Carriage
Motor
Heater
Drivers
Drivers Driver
DC-DC
Converter
DRAM
Paper End
Sensor
Home Position
Sensor
Printer Head
FDU
Carriage
FCE
IJC
DRAM
Working
RAM
ECM/
SAF
Memory
EEPROM
Operation
Panel
Thermistor
Cartridge
Type/
Color
Detection
LED
Driver
Centronics
Interface
H505V504.wmf
OVERALL MACHINE INFORMATION November 28th, 1995
OVERALL MACHINE CONTROL
1-8

The 512 KB DRAM contains the SAF memory, ECM buffer memory, and work
area. The SAF memory can be extended by 2 or 4 Mbytes with an IC card.
A 512 KB (4 Mbit) ROM is used for the system ROM.
For the USA and some Europe models, the software in this ROM can be re-
written from the IC card slot or by RDS (because a Flash ROM is used).
The IJC consists of the following components:
•CPU - 16-bit CPU with 16-MHz external clock input
•Printer Controller - Gate Array
•RIDC - Raster Image Data Controller, interface between FCE and IJC
•ROM - The inkjet printer control program and the bitmap font data
•DRAM - Receive buffer, download buffer, and working area for printing
•I/F Controller - Centronics Interface Controller
•SRAM - Working area
•HIC - Hybrid IC, Tx/Rx Amplifier
•Thermistor - Detects the temperature in the printer
•LED Driver - LED on/off control
•EEPROM - Contains the following data:
•Total amount of waste ink
•Total number of pages that have passed through the printer
mechanism
November 28th, 1995 OVERALL MACHINE INFORMATION
OVERALL MACHINE CONTROL
1-9

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
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 terminal 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.
IJC
FCE
DRAM
Video
Processing
Memory Amplifier
Line
Buffer/
FIFO
Memory
ECM/SAF
Memory
NCU
HIC
MDM
FCIP
DATA/ADDRESS BUS
HIC
To the network
Original
Image Sensor
LED Array
Contact Image Sensor Assembly
DCR
SAF IC
Card
DIP
H505V505.wmf
OVERALL MACHINE INFORMATION November 28th, 1995
VIDEO DATA PATH
1-10

1.5.2. Reception
Data from the line passes to the modem through the NCU and hybrid IC. Af-
ter the modem demodulates the data, the data (which is compressed) passes
to the SAF memory. After the data has been stored in the SAF memory, it
passes through either the FIFO or the ECM memory to the DCR block, where
the data is decompressed to raster image data.
The image data is then passed to the Print Controller for printing, through the
RIDC.
After the data has been stored in the DRAM (which acts as a print buffer), the
data is sent to the printer head through the printer head control block.
FDU
DCR
IJC
RIDC SRAM
CPU
DRAM ROM
Print Head
Controller
Printer Head
Print
Controller
Carriage
Copy Paper
H505V506.wmf
November 28th, 1995 OVERALL MACHINE INFORMATION
VIDEO DATA PATH
1-11

1.5.3. Copying
Single copy
The scanned data is processed in the DIP block. After the data has been
stored in the DRAM for printing through the RIDC, the data is sent to the
printer head through the Print Controller.
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 print controller for printing through the RIDC.
HIC
DCR
IJC
RIDC SRAM
CPU
DRAM ROM
FDU
Copy Paper
Print Head
Controller
Printer Head
Print
Controller
Carriage
Original
Image Sensor
Contact Image Sensor Assembly
LED Array
DIP
H505V507.wmf
OVERALL MACHINE INFORMATION November 28th, 1995
VIDEO DATA PATH
1-12

1.5.4. Printing from the Centronics Interface
The print data passes from the Centronics interface to the print controller
through the I/F controller and the RIDC.
The print data is stored in the DRAM, which acts as a print buffer. At the
same time, font data from the ROM is stored in the DRAM, which also acts as
a downloaded font buffer if necessary.
After the print data has been stored with the font data in the print buffer, the
print data passes through the printer head control block to the print controller
for printing.
RIDC
CPU
DRAM
Copy Paper
Printer Head
Controller
Printer Head
Print Controller
Carriage
Centronics
I/F
ROM
Printer Control
Program
Bit Map Font
Data
I/F
Controller
FDU
H505V508.wmf
November 28th, 1995 OVERALL MACHINE INFORMATION
VIDEO DATA PATH
1-13

1.6. POWER DISTRIBUTION
1.6.1. Distribution Diagram
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 power is supplied.
+5VD This supplies the DRAM and the optional IC card on the FCE to back up the
stored data for one hour. A rechargeable battery on the FDU is used to
generate +5VD.
+5VBAT This supplies the system RAM on the FCE to back up the programmed data. A
lithium battery is used to generate +5VBAT.
+24VM This is normally on when the power code is plugged in.
-5V This is used for the image sensor.
+24VH/
HVH This is supplied to the temperature control heater on the printer head.
HVDD This is supplied to the drive circuit on the printer head.
The FDU supplies + 24V and ±5V dc power to the IJC. The IJC converts the
+24V and +5V dc power supplies to the following supplies.
+5VCIS This is a more stable power supply than +5V. It is used for the Contact Image
Sensor.
+12VP This is supplied to the Flash ROMs on the FCE and the optional IC card.
PSU
Carriage
DRAM Backup
Circuit
DC-DC
Converter
+5V
-5V
+5V
+5V
HVDD
HVH
-5V
+5V
DC-DC
Comverter
Contact Image
Sensor
Ink End
Sensor
Operation
Panel
NCU
Drivers
(for Stepping Motors)
Driver
+24VM
Tx Motor Carriage
Motor Paper Feed Motor
+24VM
+24VM
-5V
+5VCIS
+5V
+5V
+5V
+24VM
FDU
IJC
+12VP
+24VM
+24VH
+24VM
+24VH
+24VM
BAT
+5V
+5VBAT
+5V
+5VBAT
FCE
+24VM
H505V509.wmf
OVERALL MACHINE INFORMATION November 28th, 1995
POWER DISTRIBUTION
1-14