Ricoh FT2212, FT2012 Service Manual

A183/A184

SERVICE MANUAL

RICOH GROUP COMPANIES

PN: RCSM2012

SERVICE MANUAL

A183/A184

RICOH GROUP COMPANIES

A183/A184

SERVICE MANUAL

PN: RCSM2012

WARNING

The Service Manual contains information regarding service techniques, procedures, processes and spare parts of office equipment distributed by Ricoh Corporation. Users of this manual should be either service trained or certified by successfully completing a Ricoh Technical Training Program.

Untrained and uncertified users utilizing information contained in this service manual to repair or modify Ricoh equipment risk personal injury, damage to property or loss of warranty protection.

Ricoh Corporation

LEGEND

PRODUCT CODE COMPANY

GESTETNER RICOH SAVIN

A183 FT2012 A184 FT2212

DOCUMENTATION HISTORY

REV. NO. DATE COMMENTS

9/97 Original Printing

OVERALL INFORMATION

1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

2. COPY PROCESS AROUND THE DRUM. . . . . . . . . . . . . . . . . . . . . 1-4

3. MECHANICAL COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . 1-6

4. ELECTRICAL COMPONENT DESCRIPTIONS. . . . . . . . . . . . . . . . 1-7

DETAILED DESCRIPTIONS

1. DRUM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

1.1 OPC DRUM CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

1.2 DRIVE MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2. CHARGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.1 OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.2 CHARGE CORONA CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

3. OPTICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

3.1 OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

3.2 SCANNER DRIVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

3.3 LENS AND 4TH/5TH MIRROR DRIVE (A184 copier only). . . . . . . . . . . . . . . . 2-7

3.4 AUTOMATIC IMAGE DENSITY SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

3.5 EXPOSURE LAMP VOLTAGE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

4. ERASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

4.1 OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

4.2 LEAD EDGE ERASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

4.3 SIDE ERASE (A184 copier only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

4.4 TRAILING EDGE ERASE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

5. DEVELOPMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

5.1 OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

5.2 DRIVE MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

SM i A183/A184

5.3 CROSS-MIXING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

5.4 DEVELOPMENT BIAS FOR IMAGE DENSITY CONTROL. . . . . . . . . . . . . . 2-17

5.4.1 Base Bias Voltage Factor In Manual Image Density Mode. . . . . . . . . . . 2-17

5.4.2 Base Bias Voltage Factor In Automatic Image Density (ADS) Mode . . . 2-18

5.4.3 Image Bias Voltage Adjustment Factor. . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

5.4.4 Drum Residual Voltage (V

5.5 DEVELOPMENT BIAS CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

) Correction Factor. . . . . . . . . . . . . . . . . . . . 2-19

6. TONER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

6.1 TONER SUPPLY MECHANISM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

6.2 TONER DENSITY DETECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

6.3 TONER SUPPLY CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

6.3.1 Detect Supply Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

6.3.2 Fixed Supply Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26

6.3.3 TD Sensor Check and Toner Supply Timing. . . . . . . . . . . . . . . . . . . . . . 2-26

6.3.4 Abnormal Condition in Toner Density Detection . . . . . . . . . . . . . . . . . . . 2-26

6.4 TONER END CONDITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27

6.4.1 Toner Near End. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27

6.4.2 Toner End . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27

6.4.3 Toner End Recovery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27

7. IMAGE TRANSFER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28

7.1 OVERALL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28

7.2 TRANSFER CORONA CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29

8. DRUM CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30

8.1 OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30

8.2 TONER RECYCLING MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31

9. QUENCHING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32

10. PAPER FEED AND REGISTRATION . . . . . . . . . . . . . . . . . . . . . 2-33

10.1 OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33

10.2 PAPER FEED MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34

10.3 REGISTRATION MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35

10.4 BY-PASS FEED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36

A183/A184 ii SM

10.5 PAPER FEED AND MISFEED DETECTION TIMING . . . . . . . . . . . . . . . . . 2-37

11. IMAGE FUSING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38

11.1 OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38

11.2 FUSING DRIVE MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39

11.3 FUSING LAMP CONTROL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40

11.4 FUSING LAMP CONTROL CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42

11.4.1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42

11.4.2 On/Off Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-43

11.4.3 Phase Control Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-43

11.4.4 Overheat Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44

INSTALLATION

1. INSTALLATION REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

1.1 ENVIRONMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

1.2 MACHINE LEVEL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

1.3 MINIMUM SPACE REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

1.4 POWER REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

2. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

2.1 ACCESSORY CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

2.2 INSTALLATION PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

SERVICE TABLES

1. SERVICE REMARKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

1.1 GENERAL CAUTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

1.2 IMAGING UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

1.3 OPTICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

1.4 TRANSFER CORONA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

1.5 FUSING UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

1.6 PAPER FEED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

1.7 OTHERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

SM iii A183/A184

2. PROGRAM MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

2.1 BASIC OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

2.2 SP MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

2.3 SP MODE QUICK REFERENCE TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

2.4 UP MODE AND SP MODE CROSS REFERENCE TABLE . . . . . . . . . . . . . . . 4-9

2.5 SERVICE PROGRAM MODE TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

2.6 CLEAR ALL MEMORY PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21

3. SERVICE TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23

3.1 TEST POINTS (Main Control Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23

3.2 VARIABLE RESISTORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23

PREVENTIVE MAINTENANCE

1. PREVENTIVE MAINTENANCE SCHEDULE. . . . . . . . . . . . . . . . . . 5-1

1.1 PM TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

1.2 REGULAR PM PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

2. SPECIAL TOOLS AND LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . 5-5

REPLACEMENT ADJUSTMENT

1. EXTERIOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

1.1 OPERATION PANEL POSITION CHANGE. . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

1.2 PLATEN COVER POSITION CHANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

1.3 EXTERIOR COVER/EXPOSURE GLASS REMOVAL. . . . . . . . . . . . . . . . . . . 6-3

1.4 UPPER UNIT STOPPER RELEASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

2. OPTICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

2.1 1ST SCANNER REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

2.2 2ND MIRROR REPLACEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

2.3 3RD MIRROR REPLACEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

2.4 LENS AND 4TH/5TH MIRROR POSITION ADJUSTMENT

(A184 model only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

2.5 4TH MIRROR REMOVAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

A183/A184 iv SM

2.6 5TH MIRROR REMOVAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

2.7 LENS AND MIRROR MOTOR REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

3. IMAGING UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

3.1 IMAGING UNIT REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

3.2 CHARGE CORONA UNIT REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13

3.3 CLEANING BLADE REPLACEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14

4. PAPER FEED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

4.1 PAPER FEED CLUTCH REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

4.2 PAPER FEED ROLLER REMOVAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16

4.3 REGISTRAION SOLENOID REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . 6-17

5. FUSING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18

5.1 FUSING UNIT REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18

5.2 PRESSURE ROLLER REPLACEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19

5.3 FUSING LAMP REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

5.4 FUSING EXIT PAWL REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21

5.5 HOT ROLLER REPLACEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22

5.6 FUSING THERMISTOR REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23

5.7 FUSING THERMOFUSE REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23

6. OTHERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24

6.1 TRANSFER CORONA UNIT REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24

6.2 MAIN DRIVE UNIT REMOVAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25

6.3 MAIN MOTOR REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26

6.4 TONER SUPPLY CLUTCH REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27

6.5 ERASE LAMP REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28

6.6 QUENCHING LAMP REMOVAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-29

6.7 OZONE FILTER REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-30

6.8 AC DRIVE/DC POWER SUPPLY BOARD/TRANSFORMER

REPLACEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31

6.9 MAIN CONTROL BOARD REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . 6-32

7. COPY QUALITY ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . 6-33

7.1 LIGHT INTENSITY ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34

7.1.1 Base Exposure Lamp Voltage Adjustment . . . . . . . . . . . . . . . . . . . . . . . 6-34

SM v A183/A184

7.1.2 SP Image Density Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-35

7.2 DEVELOPMENT BIAS VOLTAGE ADJUSTMENT . . . . . . . . . . . . . . . . . . . . 6-36

7.2.1 Base Bias Voltage Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36

7.2.2 SP Bias Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-37

7.3 TONER DENSITY ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-37

7.4 GRID VOLTAGE ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-38

7.5 DRUM CURRENT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-39

7.6 ADS ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-41

7.7 VERTICAL MAGNIFICATION ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . 6-41

7.8 HORIZONTAL MAGNIFICATION ADJUSTMENT (A184 only). . . . . . . . . . . . 6-41

7.9 REGISTRATION ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-42

7.10 ERASE MARGIN ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-42

7.11 FOCUS ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-43

TROUBLESHOOTING

1. COPY QUALITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

1.1 BLANK COPY (WHITE COPY). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

1.2 DIRTY BACKGROUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

1.3 UNEVEN IMAGE DENSITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

1.4 VERTICAL BLACK BANDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

1.5 VERTICAL BLACK LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

1.6 VERTICAL WHITE LINES OR BANDS-1 (DULL OR BLURRED) . . . . . . . . . . 7-8

1.7 VERTICAL WHITE LINES OR BANDS-2 (THIN, DISTINCT). . . . . . . . . . . . . . 7-9

1.8 HORIZONTAL BLACK/WHITE LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10

1.9 JITTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11

1.10 BLACK SPOTS ON THE COPY IMAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12

1.11 SKEWED (OPTICAL) COPY IMAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13

1.12 TONER DENSITY TOO HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14

1.13 TONER DENSITY TOO LOW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-16

1.14 UNFUSED COPY IMAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18

1.15 CREASING PAPER AFTER FUSING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18

A183/A184 vi SM

1.16 PAPER MISFEED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-19

1.17 ABNORMAL CONDITION IN TONER DENSITY DETECTION . . . . . . . . . . 7-20

1.18 OPTICS OVERHEAT PROTECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-22

2. SERVICE CALL CONDITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-23

3. ELECTRICAL COMPONENT DEFECTS . . . . . . . . . . . . . . . . . . . . 7-28

3.1 SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-28

3.2 SWITCHES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-28

4. BLOWN FUSE CONDITIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-29

5. USER CODES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-29

SM vii A183/A184

IMPORTANT SAFETY NOTICES

PREVENTION OF PHYSICAL INJURY

1. Before disassembling or assembling any parts of the copier, make sure that the power cord is unplugged.

2. The wall outlet should be near the copier and easily accessible.

3. If any adjustment or operation check has to be made with exterior covers off or open while the main switch is turned on, keep hands away from electrified or mechanically driven components.

4. The inside and the metal parts of the fusing unit become extremely hot while the copier is operating. Be careful to avoid touching those components with your bare hands.

HEALTH SAFETY CONDITIONS

1. Toner and developer are non-toxic, but if you get either of them in your eyes by accident, it may cause temporary eye discomfort. Try to remove with eye drops or flush with water as first aid. If unsuccessful, get medical attention.

OBSERVANCE OF ELECTRICAL SAFETY STANDARDS

1. The copier must be maintained by a customer service representative who has completed the training course on the model.

SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL

1. Do not incinerate toner cartridges or used toner. Toner dust may ignite suddenly when exposed to open flame.

2. Dispose of imaging units in accordance with local regulations. (These are non-toxic supplies.)

3. Dispose of replaced parts in accordance with local regulations.

TAB INDEX FOR A183/A184

OVERALL MACHINE INFORMATION

DETAILED DESCRIPTIONS

INSTALLATION

TAB POSITION 1

TAB POSITION 2TAB POSITION 3TAB POSITION 4

SERVICE TABLES

PREVENTIVE MAINTENANCE

REPLACEMENT AND ADJUSTMENT

TROUBLESHOOTING

TAB POSITION 5TAB POSITION 6

TAB POSITION 7TAB POSITION 8

OVERALL

MACHINE INFORMATION

SPECIFICATIONS

1. SPECIFICATIONS

Configuration: Desk Top Copy Process: Dry electrostatic transfer system Originals: Sheet/Book Original Size: Maximum: A4/8.5" x 14" (A183 copier)

B4/10" x 14" (A184 copier)

Copy Paper Size: Paper tray feed:

A4, 8.5" x 11", 8.5" x 13", 8.5" x 14"

Bypass feed:

Maximum: A4/8.5" x 14" Minimum: A5/5.5" x 8.5"

Copy Paper Weight: Paper tray feed: 64 to 86 g/m2, 17 to 23 lb

Bypass feed: 60 to 105 g/m2, 16 to 27 lb

Overall

Information

Reproduction Ratios (A184 model only):

Enlargement

Full Size 100% 100%

Reduction

Metric Version Inch Version

141% 122%

93% 82% 71%

129%

93% 85% 78%

Zoom (A184 model only): From 70% to 141% in 1% steps Copying Speed: 12 copies/minute (A4/8.5" x 11") Warm-up Time:

Less than 30 seconds (at 23°C) First Copy Time: Less than 9 seconds (A4/8.5" x 11") Copy Number Input: Up/Down key, 1 to 50 Manual Image Density

4 steps; can also be set to 5 steps Selection:

Automatic Reset: 1 minute standard setting; can also be set to

3 minutes or no auto reset Paper Capacity: Paper Tray:

250 sheets (A4/8.5" x 11", 80 g/m2/20 lb) 100 sheets (8.5" x 14", 80 g/m2/20 lb)

Bypass feed entrance: 1 sheet Toner Replenishment: Bottle exchange (91 g/bottle)

SM 1-1 A183/A184

SPECIFICATIONS

Copy Tray Capacity:

A4/8.5" x 11" 20 sheets 50 sheets

8.5" x 14" 10 sheets 50 sheets OHP — 1 sheet

Power Source: 120 V/60 Hz:

More than 10 A (for North America)

220 ~ 240 V/50 Hz:

More than 6 A (for Europe)

220 V/50 Hz:

More than 6 A (for Asia)

220 V/60 Hz:

More than 6 A (for Middle East/Asia)

110 V/60 Hz:

More than 10 A (for Taiwan)

127 V/60 Hz:

More than 10 A (for Middle East)

Power Consumption:

Maximum Copy cycle condition Warm-up condiiton Stand-by condition

Copy tray in the

closed position

Copy tray in the

open position

0.9 kW

0.5 kW

0.6 kW

0.1 kW

Dimensions:

Copier

Width Depth Height

400 mm

(15.8")

550 mm

(21.7")

220 mm

(8.7")

Noise Emissions: Sound pressure level (the measurements are

made according to ISO 7779 at the operator position.)

Less than 55 dB Sound power level (the measurements are made

according to ISO 7779)

Stand-by condition Less than 40 dB Copy cycle condition Less than 63 dB

Weight: Less than 18 kg, 39.7 Ib

A183/A184 1-2 SM

MEMO

SPECIFICATIONS

Overall

Information

SM 1-3 A183/A184

COPY PROCESS AROUND THE DRUM

2. COPY PROCESS AROUND THE DRUM

A184V501.wmf

A183/A184 1-4 SM

COPY PROCESS AROUND THE DRUM

1. DRUM CHARGE

In the dark, the charge corona unit gives a uniform negative charge to the organic photoconductive (OPC) drum. The charge remains on the surface of the drum because the OPC drum has a high electrical resistance in the dark.

2. EXPOSURE

An image of the original is reflected to the drum surface via the optics assembly. The charge on the drum surface is dissipated in direct proportion to the intensity of the reflected light, thus producing an electrical latent image on the drum surface.

3. ERASE

The erase lamp illuminates the area of the charged drum surface that will not be used for the copy image. The resistance of the drum in the illuminated areas drops and the charge on those areas dissipates.

4. DEVELOPMENT

Positively charged toner is attached to the negatively charged areas of the drum, thus developing the latent image. (The positive triboelectric charge is caused by friction between the carrier and toner particles.)

Overall

Information

5. IMAGE TRANSFER

Paper is fed to the drum surface at the proper time so as to align the copy paper and the developed image on the drum surface. Then, a strong negative charge is applied to the back side of the copy paper, producing an electrical force which pulls the toner particles from the drum surface to the copy paper. At the same time, the copy paper is electrically attracted to the drum surface.

6. CLEANING

The cleaning blade scrapes the toner off the drum. The collected toner is recycled.

7. QUENCHING

Light from the quenching lamp electrically neutralizes the drum surface.

SM 1-5 A183/A184

MECHANICAL COMPONENT LAYOUT

3. MECHANICAL COMPONENT LAYOUT

1 1098765432

21 20 16171819 1415

1. 2nd Mirror

2. 1st Mirror

3. Exposure Lamp

A184V500.wmf

13. Relay Rollers

14. Paper Feed Roller

15. Toner Bottle Holder

4. Quenching Lamp

5. Charge Corona Unit

6. 6th Mirror

7. Lens

8. Erase Lamp

9. Development Roller

10. 4th Mirror

11. 5th Mirror

12. By-pass Feed Table

A183/A184 1-6 SM

16. Registration Rollers

17. Transfer Corona Unit

18. Drum

19. Cleaning Blade

20. Pressure Roller

21. Hot Roller

22. Exit Rollers

23. Copy Tray

24. 3rd Mirror

ELECTRICAL COMPONENT DESCRIPTIONS

4. ELECTRICAL COMPONENT DESCRIPTIONS

Refer to the electrical component layout and the point-to-point diagram on the waterproof paper in the pocket for symbols and index numbers.

Symbol Name Function Index No.

Motors

M3 Scanner Drive Motor Drives the scanners (1st and 2nd). 10

Main Motor Drives all the main unit components except

for the optics unit and fans.

Exhaust Fan Motor Removes heat from around the fusing unit

and blows the ozone built up around the charge corona unit to the ozone filter.

Lens and Mirror Motor (A184 machines only)

Optics Cooling Fan Motor (220 ~ 240 V machines only)

Moves the lens and 4th/5th mirror positions in accordance with the selected magnification.

Prevents build-up of hot air in the optics cavity.

Overall

Information

Clutches

CL1

CL2

Switches

SW1 Main Switch Supplies power to the copier. 28 SW2 Interlock Switch Cuts all power when the upper unit is opened. 29

Sensors

S5 S6 Exit Sensor Detects misfeeds. 30

Toner Supply Clutch Transfers main motor drive to the toner bottle

gear.

Paper Feed Clutch Transfers main motor drive to the paper feed

roller.

ADS Sensor Detects the background density of the

original.

Registration Sensor Detects paper end conditions. Checks if

paper is set on the by-pass feed table.

Lens and Mirror H. P. Sensor (A184 machines only)

Scanner H. P. Sensor Informs the CPU when the 1st scanner is at

Toner Density (TD) Sensor

Informs the CPU when the lens and 4th/5th mirror assembly are at the home position (full size position).

the home position. Detects the ratio of toner to carrier in the

developer.

Solenoid

SOL 1

SM 1-7 A183/A184

Registration Solenoid Releases the stopper, synchronizing the

paper-feed timing with the original scan.

ELECTRICAL COMPONENT DESCRIPTIONS

Symbol Name Function Index No.

Printed Circuit Boards

PCB1 Main Control Board Controls all copier functions. 5 PCB2 Scanner Drive Board Controls the scanner drive motor. 9

PCB3

PCB4

High Voltage Supply Board - CT/B/G

AC Drive / DC Power Supply Board

Provides high voltage for the charge corona, transfer corona and development bias.

Drives the exposure lamp, fusing lamp and main motor. Rectifies 30 Vac and 8 Vac input

and outputs 5 Vdc and 24 Vdc.

PCB5

Operation Panel Board

Informs the CPU of the selected modes and displays the situation on the panel.

Lamps

Exposure Lamp Applies high intensity light to the original for

exposure.

L2 Fusing Lamp Provides heat to the hot roller. 22 L3

Quenching Lamp (QL) Neutralizes any charge remaining on the

drum surface after cleaning.

Erase Lamp Discharges the drum outside of the image

area. (Provides leading/trailing edge and

side erases.)

Others

TH1

Total Counter (except for -17 machines)

Optics Thermistor Monitors the temperature around the

Keeps track of the total number of copies made.

exposure lamp for overheat protection.

TH2 Fusing Thermistor Monitors the fusing temperature. 21 TF1

TF2

Exposure Lamp Thermofuse

Fusing Thermofuse Provide back-up overheat protection in the

Transformer Steps down the wall voltage to 30 Vac and 8

Provide back-up overheat protection around the exposure lamp.

fusing unit.

Vac.

A183/A184 1-8 SM

+ 191 hidden pages

Ricoh FT2212, FT2012 Service Manual

Table of Contents

SPECIFICATIONS

COPY PROCESS AROUND THE DRUM

MECHANICAL COMPONENT LAYOUT

ELECTRICAL COMPONENT DESCRIPTIONS