Ricoh FAX2700L SPECIFICATIONS fx3700

FAX3700L

SERVICE MANUAL

September 21st, 1995
Subject to change

WARNING

I

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

Lithium Batteries (Memory Back-up)

CAUTION

I

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

Table of Contents

1. OVERALL MACHINE INFORMATION

1.1. SPECIFICATIONS * . . . . . . . . . . . . . . . . . . 1-1

1.2. FEATURES * . . . . . . . . . . . . . . . . . . . . 1-3

1.3. COMPONENT LAYOUT . . . . . . . . . . . . . . . . 1-6

1.3.1. Mechanical Components . . . . . . . . . . . . . . 1-6

1.3.2. Drive Components . . . . . . . . . . . . . . . . 1-8

1.3.3. Electrical Components . . . . . . . . . . . . . . . 1-10

1. PCBs . . . . . . . . . . . . . . . . . . . . . . 1-11

2. Motors . . . . . . . . . . . . . . . . . . . . . . 1-11

3. Sensors . . . . . . . . . . . . . . . . . . . . . 1-12

4. Interlock Switches . . . . . . . . . . . . . . . . . 1-13

5. Others . . . . . . . . . . . . . . . . . . . . . . 1-13

6. Optional Equipment . . . . . . . . . . . . . . . . 1-14

1.4. OVERALL MACHINE CONTROL * . . . . . . . . . . . . 1-15

1.5. VIDEO DATA PATH . . . . . . . . . . . . . . . . . . 1-16

1.5.1. Transmission * . . . . . . . . . . . . . . . . . . 1-16

1.5.2. Reception * . . . . . . . . . . . . . . . . . . . 1-17

1.5.3. Copying . . . . . . . . . . . . . . . . . . . . 1-18

1.5.4. Printing from the Optional Printer Interface . . . . . . . 1-19

1.6. POWER DISTRIBUTION . . . . . . . . . . . . . . . . 1-20

1.6.1. Distribution Diagram * . . . . . . . . . . . . . . . 1-20

1.6.2. Memory Back-up Circuit . . . . . . . . . . . . . . 1-21

2. DETAILED SECTION DESCRIPTIONS

2.1. SCANNER . . . . . . . . . . . . . . . . . . . . . 2-1

2.1.1. Mechanisms . . . . . . . . . . . . . . . . . . . 2-1

1. Document Detection . . . . . . . . . . . . . . . . 2-1

2. Pick-up and Separation . . . . . . . . . . . . . . . 2-1

3. Drive Mechanism * . . . . . . . . . . . . . . . . . 2-2

4. Image Scanning * . . . . . . . . . . . . . . . . . 2-3

5. Sub Scan Resolution Conversion . . . . . . . . . . . 2-4

6. Stamping . . . . . . . . . . . . . . . . . . . . . 2-4

2.1.2. Scanner Timing Chart . . . . . . . . . . . . . . . 2-5

1. Timing Chart . . . . . . . . . . . . . . . . . . . 2-5

2. Jam Conditions . . . . . . . . . . . . . . . . . . 2-6

2.1.3. Video Processing . . . . . . . . . . . . . . . . . 2-7

1. Analog Signal Processing . . . . . . . . . . . . . . 2-7

2. Digital Video Processing Steps . . . . . . . . . . . . 2-8

3. Video Processing Parameters . . . . . . . . . . . . 2-11

2.2. PRINTING . . . . . . . . . . . . . . . . . . . . . . 2-12

2.2.1. Printing Process - Overview . . . . . . . . . . . . . 2-12

2.2.2. OPC Drum . . . . . . . . . . . . . . . . . . . . 2-13

2.2.3. Charge . . . . . . . . . . . . . . . . . . . . . 2-13

2.2.4. Laser Exposure . . . . . . . . . . . . . . . . . . 2-15

1. Overview . . . . . . . . . . . . . . . . . . . . . 2-15

2. Block Diagram . . . . . . . . . . . . . . . . . . 2-16

3. Error Conditions . . . . . . . . . . . . . . . . . . 2-16

4. Print Density Adjustment . . . . . . . . . . . . . . . 2-17

5. Toner Saving Mode . . . . . . . . . . . . . . . . . 2-17

2.2.5. Toner Supply . . . . . . . . . . . . . . . . . . . 2-18

2.2.6. Development . . . . . . . . . . . . . . . . . . . 2-21

2.2.7. Paper Feed . . . . . . . . . . . . . . . . . . . 2-26

1. Overview * . . . . . . . . . . . . . . . . . . . . 2-26

2. Paper Lift Mechanism . . . . . . . . . . . . . . . . 2-27

3. Paper Size and Paper End Detection . . . . . . . . . . 2-28

4. Pick-up and Separation . . . . . . . . . . . . . . . 2-30

5. Drive Mechanism . . . . . . . . . . . . . . . . . 2-30

2.2.8. Registration . . . . . . . . . . . . . . . . . . . 2-33

2.2.9. Transfer and Separation . . . . . . . . . . . . . . 2-35

2.2.10. Cleaning . . . . . . . . . . . . . . . . . . . . 2-38

2.2.11. Fusing . . . . . . . . . . . . . . . . . . . . . 2-39

2.2.12. Page Separation and Data Reduction . . . . . . . . 2-43

2.2.13. Paper Size Selection * . . . . . . . . . . . . . . 2-45

2.3. SYSTEM FEATURES . . . . . . . . . . . . . . . . . 2-46

2.3.1. Power Saver Modes * . . . . . . . . . . . . . . . 2-46

1. Going into a Power Saver Mode . . . . . . . . . . . . 2-47

2. Going into Level 2 Mode from Level 1 Mode * . . . . . . 2-49

3. Receiving a Fax Message in Power Saver Mode . . . . . 2-51

4. Sending a Fax Message or Copying in Power Saver Mode . 2-53

2.3.2. Automatic Service Calls . . . . . . . . . . . . . . 2-55

1. Service Call Conditions . . . . . . . . . . . . . . . 2-55

2. Excessive Jam Alarms . . . . . . . . . . . . . . . 2-56

3. Periodic Service Call . . . . . . . . . . . . . . . . 2-57

4. PM Call . . . . . . . . . . . . . . . . . . . . . 2-58

5. Effective Term of Service Calls . . . . . . . . . . . . 2-58

2.4. PCBs . . . . . . . . . . . . . . . . . . . . . . . 2-59

2.4.1. FCE2 * . . . . . . . . . . . . . . . . . . . . . 2-59

1. FCIP (Facsimile Controller and Image Processor) . . . . . 2-59

2. Modem (Rockwell R144EFXL) * . . . . . . . . . . . . 2-59

3. ROM * . . . . . . . . . . . . . . . . . . . . . . 2-60

4. DRAM * . . . . . . . . . . . . . . . . . . . . . 2-60

5. SRAM . . . . . . . . . . . . . . . . . . . . . . 2-60

6. Video SRAM . . . . . . . . . . . . . . . . . . . 2-60

7. Oscillators * . . . . . . . . . . . . . . . . . . . . 2-60

8. Jumpers, Switches, and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . 2-60

2.4.2. FDU * . . . . . . . . . . . . . . . . . . . . . . 2-61

1. Power Saver CPU . . . . . . . . . . . . . . . . . 2-61

2. FPD (Facsimile Power Driver) . . . . . . . . . . . . 2-61

3. EXIO (External I/O) * . . . . . . . . . . . . . . . . 2-61

4. HIC (Hybrid IC) . . . . . . . . . . . . . . . . . . 2-61

5. DC/DC Converters . . . . . . . . . . . . . . . . . 2-61

6. Interlock Switches . . . . . . . . . . . . . . . . . 2-62

7. Jumpers, Switches, and Test Points . . . . . . . . . . 2-62

2.4.3. PSU . . . . . . . . . . . . . . . . . . . . . . 2-62

2.4.4. NCU (USA) . . . . . . . . . . . . . . . . . . . 2-63

1. Jumpers . . . . . . . . . . . . . . . . . . . . . 2-63

2.4.5. NCU (Europe/Asia) . . . . . . . . . . . . . . . . 2-64

1. Control Signals and Jumpers . . . . . . . . . . . . . 2-64

3. INSTALLATION

3.1. INSTALLING THE MACHINE . . . . . . . . . . . . . . 3-1

3.2. INITIAL PROGRAMMING . . . . . . . . . . . . . . . 3-1

3.3. INSTALLING OPTIONAL UNITS . . . . . . . . . . . . . 3-2

3.3.1. Printer Interface . . . . . . . . . . . . . . . . . . 3-2

3.3.2. Counter . . . . . . . . . . . . . . . . . . . . . 3-3

3.3.3. Handset . . . . . . . . . . . . . . . . . . . . . 3-3

3.3.4. RS232C Interface . . . . . . . . . . . . . . . . . 3-4

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) . . . . . . . . . . . 4-3

4.1.4. Service Monitor Report (Function 04) . . . . . . . . . 4-3

4.1.5. Protocol Dump (Function 05) . . . . . . . . . . . . 4-4

4.1.6. RAM Display/Rewrite (Function 06) . . . . . . . . . . 4-4

4.1.7. RAM Dump (Function 06) . . . . . . . . . . . . . . 4-5

4.1.8. Counter Display/Rewrite (Function 07) . . . . . . . . . 4-5

4.1.9. NCU Parameters (Function 08) . . . . . . . . . . . . 4-6

4.1.10. Modem Test (Function 08) . . . . . . . . . . . . . 4-7

4.1.11. DTMF Tone Test (Function 08) . . . . . . . . . . . 4-7

4.1.12. Modem Detection Test (Function 08) . . . . . . . . . 4-8

4.1.13. Ringer Test (Function 08) . . . . . . . . . . . . . 4-8

4.1.14. Operation Panel Test (Function 09) . . . . . . . . . 4-9

4.1.15. LED Array Test (Function 10) . . . . . . . . . . . . 4-9

4.1.16. ADF Test (Function 10) . . . . . . . . . . . . . . 4-10

4.1.17. Printer Test Patterns (Function 11) . . . . . . . . . . 4-10

4.1.18. Printer Mechanism Test - Free Run (Function 11) . . . . 4-11

4.1.19. RAM Tests (Function 12) . . . . . . . . . . . . . . 4-11

4.1.20. Software Download (Function 12) . . . . . . . . . . 4-12

4.1.21. Software Upload (Function 12) . . . . . . . . . . . 4-13

4.1.22. SRAM Data Download (Function 12) . . . . . . . . . 4-14

4.1.23. Serial Number (Function 14) . . . . . . . . . . . . 4-15

4.1.24. Service Station Fax Number (Function 13) . . . . . . . 4-15

4.2. BIT SWITCHES . . . . . . . . . . . . . . . . . . . 4-16

4.2.1. System Switches . . . . . . . . . . . . . . . . . 4-16

4.2.2. Scanner Switches . . . . . . . . . . . . . . . . 4-25

4.2.3. Printer Switches . . . . . . . . . . . . . . . . . 4-27

4.2.4. Communication Switches . . . . . . . . . . . . . . 4-30

4.2.5. G3 Switches . . . . . . . . . . . . . . . . . . . 4-36

4.3. NCU PARAMETERS * . . . . . . . . . . . . . . . . . 4-42

4.4. DEDICATED TRANSMISSION PARAMETERS . . . . . . . 4-70

4.4.1. Programming Procedure . . . . . . . . . . . . . . 4-70

4.4.2. Parameters . . . . . . . . . . . . . . . . . . . 4-71

4.5. SERVICE RAM ADDRESSES * . . . . . . . . . . . . . 4-73

4.6. SPECIAL TOOLS AND LUBRICANTS . . . . . . . . . . 4-86

4.7. PM TABLE . . . . . . . . . . . . . . . . . . . . . 4-86

5. REPLACEMENT AND ADJUSTMENT

5.1. COVERS . . . . . . . . . . . . . . . . . . . . . . 5-1

5.1.1. Document Table and Tray . . . . . . . . . . . . . . 5-1

5.1.2. Rear Cover Assembly . . . . . . . . . . . . . . . 5-2

5.1.3. Left Cover . . . . . . . . . . . . . . . . . . . . 5-2

5.1.4. Right Cover . . . . . . . . . . . . . . . . . . . 5-3

5.1.5. Operation Panel Assembly . . . . . . . . . . . . . 5-3

5.1.6. Operation Panel and ADF Upper Unit . . . . . . . . . 5-4

5.1.7. Top Cover . . . . . . . . . . . . . . . . . . . . 5-4

5.2. OPERATION PANEL . . . . . . . . . . . . . . . . . 5-5

5.2.1. Operation Panel and OPU . . . . . . . . . . . . . 5-5

5.3. ADF . . . . . . . . . . . . . . . . . . . . . . . . 5-5

5.3.1. ADF Roller Assembly . . . . . . . . . . . . . . . . 5-5

5.3.2. Separation Rubber Plate . . . . . . . . . . . . . . 5-6

5.3.3. Separation Pressure Adjustment . . . . . . . . . . . 5-6

5.3.4. ADF Sensors . . . . . . . . . . . . . . . . . . . 5-7

5.3.5. Scanner Shading Plate . . . . . . . . . . . . . . . 5-7

5.4. SCANNER . . . . . . . . . . . . . . . . . . . . . 5-8

5.4.1. Scanner Unit Disassembly . . . . . . . . . . . . . 5-8

5.4.2. Tx Motor and Drive Components . . . . . . . . . . . 5-8

5.4.3. R1/R2 Rollers . . . . . . . . . . . . . . . . . . 5-9

5.4.4. Contact Image Sensor . . . . . . . . . . . . . . . 5-10

5.5. LASER PRINTING COMPONENTS . . . . . . . . . . . 5-11

5.5.1. Laser Unit . . . . . . . . . . . . . . . . . . . . 5-11

5.5.2. Laser Diode Unit and Hexagonal Mirror Motor . . . . . . 5-12

5.6. DEVELOPMENT . . . . . . . . . . . . . . . . . . . 5-13

5.6.1. Development Unit . . . . . . . . . . . . . . . . . 5-13

5.6.2. Transfer Roller . . . . . . . . . . . . . . . . . . 5-14

5.6.3. Main Motor and Gears . . . . . . . . . . . . . . . 5-14

5.6.4. Replacing the Development Unit . . . . . . . . . . . 5-15

5.7. FUSING . . . . . . . . . . . . . . . . . . . . . . 5-18

5.7.1. Thermistor . . . . . . . . . . . . . . . . . . . . 5-18

5.7.2. Fusing Unit . . . . . . . . . . . . . . . . . . . 5-18

5.7.3. Hot Roller Strippers . . . . . . . . . . . . . . . . 5-20

5.7.4. Fusing Lamp . . . . . . . . . . . . . . . . . . . 5-20

5.7.5. Hot Roller . . . . . . . . . . . . . . . . . . . . 5-21

5.7.6. Pressure Roller . . . . . . . . . . . . . . . . . . 5-23

5.7.7. Thermostat and Thermofuse . . . . . . . . . . . . . 5-23

5.8. PAPER FEED . . . . . . . . . . . . . . . . . . . . 5-24

5.8.1. Paper Feed Motor and Clutch Box . . . . . . . . . . 5-24

5.8.2. Paper End Sensor . . . . . . . . . . . . . . . . . 5-24

5.8.3. Paper Feed Rollers, Paper Size Sensor, and Relay Connector 5-25

5.8.4. Registration Roller and Bypass Feed Sensor . . . . . . 5-26

5.9. PCBs . . . . . . . . . . . . . . . . . . . . . . . 5-27

5.9.1. PSU and NCU . . . . . . . . . . . . . . . . . . 5-27

5.9.2. NCU, FDU, and FCE . . . . . . . . . . . . . . . . 5-27

5.9.3. Power Pack . . . . . . . . . . . . . . . . . . . 5-28

5.10. OTHERS . . . . . . . . . . . . . . . . . . . . . . 5-29

5.10.1. Ozone Filter and Fan Motor . . . . . . . . . . . . 5-29

5.11. 100 SHEET PAPER CASSETTE (OPTIONAL) . . . . . . . 5-29

5.11.1. Relay Connector and Gear Cover . . . . . . . . . . 5-29

5.11.2. Paper End Sensor and Drive Components . . . . . . . 5-30

5.11.3. Paper Size Sensor . . . . . . . . . . . . . . . . 5-31

5.12. IMAGE ADJUSTMENT . . . . . . . . . . . . . . . . 5-32

5.12.1. Overview . . . . . . . . . . . . . . . . . . . . 5-32

5.12.2. Scanner Parameters . . . . . . . . . . . . . . . 5-33

1. Contrast . . . . . . . . . . . . . . . . . . . . . 5-33

2. Margins . . . . . . . . . . . . . . . . . . . . . 5-33

5.12.3. Printer Parameters . . . . . . . . . . . . . . . . 5-34

1. Margins (Main Scan Direction) * . . . . . . . . . . . . 5-34

2. Margins (Sub Scan Direction) * . . . . . . . . . . . . 5-35

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 . . . . . . . . . . . . . . . . . 6-4

6.1.4. Uneven Image Density . . . . . . . . . . . . . . . 6-5

6.1.5. Vertical Black Lines . . . . . . . . . . . . . . . . 6-6

6.1.6. Horizontal Black Lines . . . . . . . . . . . . . . . 6-7

6.1.7. Vertical White Lines . . . . . . . . . . . . . . . . 6-8

6.1.8. Horizontal White Lines . . . . . . . . . . . . . . . 6-9

6.1.9. Black Dots/Spots . . . . . . . . . . . . . . . . . 6-10

6.1.10. White Spots in Black Image Areas . . . . . . . . . . 6-11

6.1.11. Faint Copies . . . . . . . . . . . . . . . . . . 6-12

6.1.12. Vertical Black Band . . . . . . . . . . . . . . . . 6-14

6.1.13. Unfused Copies . . . . . . . . . . . . . . . . . 6-15

6.1.14. Ghost Image . . . . . . . . . . . . . . . . . . 6-15

6.1.15. Toner on the Back of the Printer Paper . . . . . . . . 6-16

6.1.16. Misaligned Output (Data shifted to the right or left) . . . 6-17

6.1.17. Misaligned Output (Image shifted vertically)/Reduced Image 6-17

6.2. MECHANICAL PROBLEMS . . . . . . . . . . . . . . 6-18

6.2.1. ADF/Scanner . . . . . . . . . . . . . . . . . . . 6-18

1. Non Feed . . . . . . . . . . . . . . . . . . . . 6-18

2. Jam . . . . . . . . . . . . . . . . . . . . . . . 6-19

3. Skew . . . . . . . . . . . . . . . . . . . . . . 6-20

4. Multi-feed . . . . . . . . . . . . . . . . . . . . 6-20

6.2.2. Printer . . . . . . . . . . . . . . . . . . . . . 6-21

1. Non-feed . . . . . . . . . . . . . . . . . . . . . 6-21

2. Paper Jam - Inside Printer . . . . . . . . . . . . . . 6-22

3. Jam - Fusing Exit . . . . . . . . . . . . . . . . . 6-23

4. Skew . . . . . . . . . . . . . . . . . . . . . . 6-24

5. Multi-feed . . . . . . . . . . . . . . . . . . . . 6-25

6.3. SERVICE CALL CONDITIONS . . . . . . . . . . . . . 6-26

6.4. ERROR CODES . . . . . . . . . . . . . . . . . . . 6-30

6.5. ELECTRICAL COMPONENT DEFECTS . . . . . . . . . 6-37

6.5.1. Defective Sensor Table . . . . . . . . . . . . . . . 6-37

6.5.2. Blown Fuse Table . . . . . . . . . . . . . . . . . 6-37

August 2nd, 1995 OVERALL MACHINE INFORMATION

SPECIFICATIONS *

1. OVERALL MACHINE INFORMATION

1.1. SPECIFICATIONS *

Type

Desktop type transceiver

Circuit

PSTN, PABX

Connection

Direct couple

Document Size
Length:

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

Thickness:

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

Document Feed

Automatic feed, face down

ADF Capacity

30 sheets (using 20 lb or 80 g/m

Scanning Method

Contact image sensor

Maximum Scan Width

256 mm [10.1 ins] ± 0.25%

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

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

Memory Capacity
ECM: 64 or 128 kbytes

(depends on the amount of image data)
SAF: 512 kbytes (38 pages/Slerexe letter),
extra 2 Mbyte (186 pages) or 4 Mbyte (350
pages) memory card available

Compression

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

2

)

2

paper)

Protocol

Group 3 with ECM

Modulation

V.33/ V.17(TCM), V.29 (QAM), V.27ter
(PHM), V.21 (FM)

Data Rate (bps)

14,400/12,000/9600/7200/4800/2400
Automatic fallback

I/O Rate

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

Transmission Time

6 s at 14,400 bps; Measured with G3 ECM
using memory for a ITU-T #1 test document
(Slerexe letter) at standard resolution

Printing System

Laser printing, plain paper, dry toner

Paper Size and Capacity
Standard Cassette: 250 sheets

USA: Letter, Legal
Europe: A4, A5 sideways
Asia: A4, A5 sideways, F, F4
100 Sheet Cassette (Optional): 100 sheets
USA: Letter, Legal
Europe: A4, A5 sideways
Asia: A4, A5 sideways, F, F4
Paper Feed Unit (Optional): 500 sheets
USA: Letter, Legal
Europe: A4, A5 sideways
Asia: A4, A5 sideways, F/F4

Maximum Printing Width

208 mm [8.1 ins]

Print Resolutions
Fax and Copy Mode:

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

Printer Mode: 300 x 300 dpi
Power Supply

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

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

1-1

OVERALL MACHINE INFORMATION August 2nd, 1995
SPECIFICATIONS *

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

Dimensions (W x D x H)

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

Weight

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

1-2

August 2nd, 1995 OVERALL MACHINE INFORMATION

FEATURES *

1.2. FEATURES *

KEY: O = Used, X = Not Used,
A = With optional memory only,
B = With optional 100 sheet cassette only
C = With optional counter only
D = With optional handset only
E = With optional printer interface only
F = With optional paper feed unit only

Equipment

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

Video Processing Features

Contrast O
Halftone (Basic & Error Diffusion) O
MTF O
Reduction (B4 -> A4) O
Resolution O
Smoothing to 16 x 15.4 l/mm O

Communication Features - Auto

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

Communication Features -

User Selectable

Action as a transfer broadcaster X
AI Redial (last ten numbers) O
Answering machine interface X

Communication Features -

User Selectable

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

Auto) O

1-3

OVERALL MACHINE INFORMATION August 2nd, 1995
FEATURES *

Communication Features -

User Selectable

Secured Polling with Stored ID
Override

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

(16 x15.4 l/mm : 400 x 400 dpi)
Telephone Directory O
Tonal Signal Transmission O
Transfer Request O
Transmission Deadline (TRD) A
Turnaround Polling X
Two- step Transfer X
Two in one O
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 O
Dedicated tx parameters O
ECM O
EFC O
Inch-mm conversion X
Page retransmission times O
Page separation mark O
Protection against wrong conn. O
Resol’n stepdown override option X
Short Preamble X
Well log O

Other User Features

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

O

X

Other User Features

Copy editing (Erase Center/Mar­gin)

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

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

X

O

1-4

August 2nd, 1995 OVERALL MACHINE INFORMATION

FEATURES *

Reports - Automat ic

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

Reports - User-initiated

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

Service Mode Features

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

Service Mode Features

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

Memory Files

Max. number of files: 100
Max. number of stations/file: 132
Max. number of stations overall: 300

1-5

2

3

31

OVERALL MACHINE INFORMATION August 2nd, 1995
COMPONENT LAYOUT

1.3. COMPONENT LAYOUT

1.3.1. Mechanical Components

9

16

17

18
19

20

15

13

12

11

1014

87

5

6

4

1

21
22
23

24

25

26

27

28

29

30

No. Name Description

R2 Roller Feeds the document through the scanner.

1

R1 Roller Feeds the document through the scanner.

2

Document Feed Roller Feeds the document into the scanner.

3

Separation Pad Allows one page into the scanner.

4

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

5

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

6

CTM (Cleaning Toner

7

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

8

table one at a time.

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

after image transfer. It is part of the CTM.

H516V501.wmf

1-6

August 2nd, 1995 OVERALL MACHINE INFORMATION

COMPONENT LAYOUT

No. Name Description

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

9

Quenching Lamp This removes excess charge from the master at the

10

Cleaning Blade This wipes toner off the OPC drum.

11

Used Toner Collection

12

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

13

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

14

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

15

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

16

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

17

OPC Drum The latent image is written to this Organic

18

Development Unit This consists of the development roller, toner

19

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

20

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

21

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

22

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

23

Paper Feed Rollers (100
Sheet Cassette)

24

Paper Feed Pressure

25

Rollers
Registration Roller This carries out the registration process.

26

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

27

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

28

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

29

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

30

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

31

print cycle. It is part of the CTM.

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

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

of the hot roller.

process.

Photoconductor Drum.

application roller, toner supply bar, and transfer roller.

the drum and onto the copy paper.

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

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

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

the cassette and feed it into the printer.

the toner tank.

collect into lumps.

the CTM.

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

1-7

2

3
22

OVERALL MACHINE INFORMATION August 2nd, 1995
COMPONENT LAYOUT

1.3.2. Drive Components

12

13

14

15

11

10

9

8

7

56

4

1

21

16

17

18

19

20

No. Name Description

Tx Motor This stepper motor drives the scanner.

1

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

2

Document Feed Drive

3

Gear
Document Feed Roller

4

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

5

Drum Drive Gear This drives the drum.

6

Used Toner Collection

7

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

8

Hot Roller Drive Gear This drives the hot roller.

9

Fusing Pressure Roller

10

Drive Gear

This drives the document feed and pick-up rollers.

This drives the document feed roller.

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

This drives the pressure roller in the fusing unit.

H516V502.wmf

1-8

August 2nd, 1995 OVERALL MACHINE INFORMATION

COMPONENT LAYOUT

No. Name Description

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

11

Development Roller Drive

12

Gear
Toner Application Roller

13

Drive Gear
Paper Feed Roller Drive

14

Gear (100 Sheet Cassette)
Registration Roller Drive

15

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

16

Paper Feed Roller Drive

17

Gear Box
Paper Feed Roller Drive

18

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

19

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

20

Toner Agitator Drive Gear This drives the toner agitator.

21

CTM Drive Gear This drives the CTM.

22

This drives the development roller.

This drives the toner application roller.

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

This drives the registration roller.

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

main cassette.
This drives the paper feed roller.

development unit, and CTM.

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

1-9

5

6

OVERALL MACHINE INFORMATION August 2nd, 1995
COMPONENT LAYOUT

1.3.3. Electrical Components

7

8

10

9

4

3

2

1

14

13

11

12

H516V503.wmf

1-10

August 2nd, 1995 OVERALL MACHINE INFORMATION

COMPONENT LAYOUT

1. PCBs
No. Name Description

FDU (Facsimile Driver
Unit)

3

FCE (Facsimile Control

6

Engine)
NCU (Network Control

2

Unit)
OPU (Operation Panel

7

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

1

LDDR (Laser Diode

8

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

10

Contact Image Sensor
Assembly

4

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

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

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

This board controls the operation panel.

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

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

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

2. Motors
No. Name Description

Tx Motor This stepper motor drives the scanner.

14

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

13

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

12

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

5

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

9

Cooling Fan Motor This cools the interior of the machine.

11

development unit, and CTM.

paper feed mechanisms in the cassettes.

in the laser printer optics.

drum, and filters out the ozone.

1-11

15

28

21

OVERALL MACHINE INFORMATION August 2nd, 1995
COMPONENT LAYOUT

20

22

19

23

24

18

25

17

26

27

16

29

33

32

31

30

H516V504.wmf

3. Sensors
No. Name Description

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

17

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

15

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

31

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

27

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

32

Registration Sensor This detects when paper has reached the registration

26

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

29

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

28

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

25

shading position.

The user must install the correct size indicator.

roller.

printer.

closed.

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

1-12

August 2nd, 1995 OVERALL MACHINE INFORMATION

COMPONENT LAYOUT

4. Interlock Switches
No. Name Description

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

30

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

5. Others
No. Name Description

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

16

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

20

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

21

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

23

Thermistor This monitors the temperature at the hot roller surface.

24

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

22

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

18

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

33

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

19

succe ssfully fed through the scanner.

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

print cycle. This is a part of CTM.

the temperature of the thermostat surface exceeds
400°C.

telephone line.

charge corona wire does not exceed -750 volts.

drum.

1-13

OVERALL MACHINE INFORMATION August 2nd, 1995
COMPONENT LAYOUT

6. Optional Equipment

35

36

37

38

39

40

41

No. Name Description

Counter This counts the number of prints.

34

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

35

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

36

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

37

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

38

Paper Size Detector (100

39

Sheet Cassette)
Paper End Sensor (100

40

Sheet Cassette)
Paper Feed Clutch (100

41

Sheet Cassette)

as a laser printer.

as an external fax device, for example.

MB or 4 MB card can be used.

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

This detects the paper size installed in the cassette.

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

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

34

H516V505.wmf

* This option may not be available in some countries.

1-14

August 2nd, 1995 OVERALL MACHINE INFORMATION

OVERALL MACHINE CONTROL *

1.4. OVERALL MACHINE CONTROL *

Optional

RS232C I/F

Optional

Optional

100 Sheet

Cassette

Optional

Printer I/F

PSU

Fusing

Lamp

IC Card

FDU

Energy

Saver

CPU

DC-DC

Converter

FCE2

Handset

Hybrid IC

(HIC)

SpeakerNCU

Working

Control Signals

The FCE2 (Facsimile Control Engine) contains the FCIP (Facsimile Control
and Image Processor), DRAM, SRAM, System RO M, R14 4EF XL modem,
and video processing memory, and controls the entire system thro ugh the
FDU (Facsimile Driver Unit).

RAM

R144EFXL

Modem

Power

Pack

DRAM

ECM/SAF

Memory

DATA/ADDRESS BUS

External I/O (EXIO)

Driver

Optional

Counter

Page

Memory

components

Scanner

and

printer

and

sensors

System

ROM

(Flash)

Operation

Panel

System

RAM

(SRAM)

FCIP

Drivers

(FPD)

Sensors

Video

SRAM

Amplifier

LDDR

Thermistor

Contact

Image

Sensor

Tx

and

paper

feed

motors

H516V506.wmf

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

The FCIP consists of the following component blo cks:

• MDM - Modem• RU8 CPU - Main CPU

• DMAC - DMA Controller• LIF- Laser Interface

• DIP - Digital Image Processor• PRIF - Printer Interface

• DCR - Data Compression and Reconstruction

The modem inside the FCIP is used for V.29, V27.ter, and V.21 communica­tions. In addition, the Ro c k well R144E F XL modem is used for V.17 and V.33
communications.

The 1.5 MB DRAM contains the SAF memory, ECM buffer memory, work
area, and page memory. The SAF memory can be extended by 2 or 4 Mbytes
with an IC card.

A 512 kB (4 Mbit) flash ROM is used for the syste m ROM. So ft ware in this
ROM can be rewritten from the IC card slot or by RDS. Another 128 kB mask
ROM contains LCD wording data.

1-15

OVERALL MACHINE INFORMATION August 2nd, 1995
VIDEO DATA PATH

1.5. VIDEO DATA PATH

1.5.1. Transmission *

Original

Contact Image Sensor

Assembly

LED Array

Image Sensor

FDU

Amplifier

FCE

Attenuator

HIC

NCU

Video

Processing

Memory

DRAM

SAF IC

Card

DIP: Digital Image Processor

Line

Buffer

/FIFO

Memory

FCIP

DCR

DATA/ADDRESS BUS

ECM/

SAF

Memory

DIP

MDM

Amp

E144EFL

Modem

DCR: Data Compression & Reconstruction
MDM: Modem

To the network

H516V507.wmf

Immediate Transmission:

Scanned data from th e contact image sensor passes to the DIP block in the
FCIP. Af te r an alo g/ 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 sto red in the SAF mem o ry after compression in th e
DCR block.
At the time for transmission, the DCR block d eco mpre sses th e data from th e
SAF memory, then compresses it again after handsh aking with the other ter­minal is done. The compressed da ta the n passes eit he r to the FIFO memory
or to the ECM memory, before it is sent to the telephone line thro ugh th e
modem.

1-16

August 2nd, 1995 OVERALL MACHINE INFORMATION

VIDEO DATA PATH

1.5.2. Reception *

From the Network

NCU

HIC

Amplifier

E144EFXL

DRAM

Line Buffer

Modem

/FIFO

Memory

DATA/ADDRESS BUS

ECM/SAF

Memory

MDM

FCIP

DCR LIF

Page

Memory

LDDR

LIF: Laser Interface
DCR: Data Compression & Reconstruction
MDM: Modem

Copy Paper

H516V508.wmf

Data from the lin e p asses to the modem through the NCU and hybrid IC. Af­ter the modem de mod ulates the data, the decompressed data pa sses to the
DCR block, through either the FIFO or the ECM memory, where the data is
decompressed to raster image data. At the same time, the compressed data
passes to the SAF memo ry as a backup in case of mechanical problems dur­ing printing (substit ute reception).

The raster image data is then p asse d t o t he pa ge memo ry for printing. Afte r a
page of data has been stored in the page memory, the data is sent to the
LDDR through the LIF block.

1-17

OVERALL MACHINE INFORMATION August 2nd, 1995
VIDEO DATA PATH

1.5.3. Copying

Original

Contact Image Sensor Assembly

Image Sensor

LED Array

FDU

Amplifier

FCE

LDDR

DRAM

Video

Processing

Memory

Line Buffer

/FIFO

Memory

DCR

DATA/ADDRESS BUS

ECM/SAF

Memory

DIP

FCIP

Page

Memory

LIF

SAF
Memory
IC Card

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

Copy Paper

H516V509.wmf

Single copy

The scanned data passe s to th e pa ge memory after video processing in the
DIP block. After a page of data ha s be en sto red in the page memory, the data
is sent to the LDDR through the LIF block.

Multi-page copy

The scanned data passe s to th e SAF memory after vid eo proce ssing (DI P)
and compression (DCR). After a pa ge of da ta ha s be en stored in the SAF
memory, the data passes to the DCR block again for de compression, then it
passes to the page memory for print ing.

1-18

August 2nd, 1995 OVERALL MACHINE INFORMATION

VIDEO DATA PATH

1.5.4. Printing from the Optional Printer Inter face

Optional Printer

Interface

FDU

FCE

PRIF

FCIP

LIF

LDDR

LIF: Laser Interface
PRIF: Printer Interface

Copy

Paper

H516V510.wmf

The page memory inside the printer interface is used to hold the print data.
After a page of data has be en stored in the printer interface’s page memory,

the data is sent to the LIF through the PRIF (Printer Interf ace) block.

1-19

OVERALL MACHINE INFORMATION August 2nd, 1995
POWER DISTRIBUTION

1.6. POWER DISTRIBUTION

1.6.1. Distribution Diagram *

AC Switching

Circuit

Fusing Lamp

ON/OFF

Circuit

AC

Main

Power

Main Switch

PSU

24VIN

IC

Card

+24VM

+24VD

Optional

Counter

+12VP

+24V

+5V

+5VD

+12VD

+5VD

+5V

+24VD

FCE

DC-DC

Converter

DC-DC

Converter

-5V

Optional 100

Cassette

+5VBAT

Sheet

+24VM
+5V

12VP

+5V

+5VE

+5vv

+5VLD

Printer

I/F

+5VD

DC-DC

Converter

+24V
+5V

RS232C

I/F

+5V

FDU

+24VM

+24VM

+24VD

+24VD

+24VD

+24VD

+5V

+5V

+5V

+5VE

+5V

Optional PFU

Motors

Feed Clutch

Stamp

Cooling Fan

Ozone Fan

Power Pack

Thermistor

Printer Sensors

Operation Panel

AC115V or 230V

Fusing

Lamp

Fusing Unit

Interlock

Switches

LDDR

+5VLD

+24V

NCU

+5VE

+24VM

+5V

+5VV

-5V

Image Sensor

+24VM

LED Array

+5VE

Scanner Sensors

H516V511.wmf

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

+5V

+5VE

+5VLD

+5VV

+5VD

+5VBAT

+24V

+24VD

+24VIN

+24VM

-5V

+12VP

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

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

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

Sensor.
This supplies back up power for the DRAM and the optional IC card on the

FCE. It can back up stored data for one hour after the power is switched off.
A rechargeable battery on the FDU is used to generate +5VD.

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

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

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

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August 2nd, 1995 OVERALL MACHINE INFORMATION

POWER DISTRIBUTION

1.6.2. Memory Back-up Circuit

[A]

[B]

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The +5VBAT supply from the lithium battery [A] backs up the system RAM
which contains system paramet ers an d pro gra mmed tele ph one nu mbe rs,
and the real time clock in the main cpu. The 5RTCCS signa l tells th e main
cpu whether the back-up po wer (+5 VB AT) is coming from the bat te ry or from
the +5V power suppl y.

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

The battery [B] generates about 3 volts (max. 3.2 volts). The dc/ dc co nverter
(IC12) lifts this voltage to 5 volts so it can be used as the +5VD supply for
SAF backup. The CPU monitors th e volt age of the +5V D supply with the
1VDET signal. When the battery has run down, and the voltage is lower than

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

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

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[A]

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August 2nd, 1995 DETAILED SECTION DESCRIPTIONS

SCANNER

2. DET AILED SECTION DESCRIPTIONS

2.1. SCANNER

2.1.1. Mechanisms

1. Document Detection

[A]

[B]

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H516D500.wmf

The document sensor [A] detects when a document is pla ced in the ADF. The
fold-down extension [B] help s to sup po rt lon ge r documents.

2. Pick-up and Separation

[D]

[B]

[C]

Plate [A] aligns the leading edges of the pages of the document. When the
machine starts feeding the docu men t, the mechanical clutch mechanism in
the ADF roller unit lifts up the p ick-up roller [B] to feed the bottom sheet of the
document. Then, the feed roller [C] feeds th e sh ee t in to th e sca nner.
The separation rubber plate [D] prevents the feed rolle r from fe ed ing more
than one sheet at a time.

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

2-1