Toshiba FC-22 (18) Uneven image density

FC-22 TROUBLESHOOTING 4 - 74 January 2000 © TOSHIBA TEC

Cause/Defect area

Step

Check items Measures

Main charger

Transfer belt

Laser optical unit

Discharge LED array

Developer unit

Scanner section

1 Main charger dirty?

2 Transfer belt dirty?

3 Transfer belt in defective contact with

drum?

4 Any abnormalities or deformation on belt?

5 Foreign matter or dust on slit glass?

6 Discharge LED array dirty?

7 Any lamp of discharge LED array gone out?

8 Magnetic brush in defective contact with

drum?

9 Developer unit pressure mechanism mal-

functioning?

10 Defective transport of developer material?

11 1. Platen cover open?

2. Glass, mirrors, or lens filter dirty?

Clean it or replace charger wire.

Clean belt.

Adjust belt.

Replace belt.

Clean slit glass.

Clean it.

Replace it.

Adjust doctor-sleeve gap.

Check mechanism.

Remove foreign matter if any.

1. Close platen cover.

2. Clean them.

(18) Uneven image density

Feeding direction

Contents

Main GENERAL PRECAUTIONS REGARDING THE INSTALLATION AND SERVICE FOR THE COPIER FC-22 Page Page Page Page Page EB7 Restart time out error 1. ADJUSTMENT ITEMS 1.1 Error Code List Second original not reaching the aligning sensor in 2-in-1 mode E79 Original pre-feeding jam C28 Scanner related service call C27 Carriage home position sensor not turning OFF within a fixed time Carriage home position sensor not turning ON within a fixed time Page Page Page Page Page 1. 2 Self Diagnostic Mode Page Page Page Table 1. Relation between bypass paper-width sensor status and paper width size. [FULL COLOR]key: OFF, [AUTO COLOR]key: OFF, [ENERGY SAVER]key: ON [FULL COLOR]key: OFF, [AUTO COLOR]key: ON, [ENERGY SAVER]key: OFF [FULL COLOR]key: OFF, [AUTO COLOR]key: ON, [ENERGY SAVER]key: ON [FULL COLOR]key: ON, [AUTO COLOR]key: OFF, [ENERGY SAVER]key: OFF Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page <Procedure> Group 1 Group 2 Group 4 Group 5 Group 6 Group 10 Group 15 Group 13 1. 2. 5 Setting mode (08) The following items can be set or changed in this mode 08. Page Page Page Page Page Page Page 805 Full-color print counter (Copier) 0 0-999999 Display of counter value (Code 08-802 is 806 Black print counter (Copier) 0 0-999999 Display of counter value (Code 08-802 is Mono-color print counter (Copier) 807 0 0-999999 Display of counter value (Code 08-802 is Page Page Refer to "Counter function and maintenance check list" Refer to "Counter function and maintenance check list" FC-22 ADJUSTMENT 1 - 42 January 2000 TOSHIBA TEC Group 1 Group 2 Group 3 Page Page January 2000 TOSHIBA TEC 1 - 45 FC-22 ADJUSTMENT 1.3 Adjustment Order (Copy Image Related Adjustment) 1. 4 Automatic Adjustment of the Auto-Toner Circuit Page Page Page 1.5 Automatic Initialization of Image Quality Control 1. 6 Copy Image Dimensional Adjustment FC-22 ADJUSTMENT 1 - 52 January 2000 TOSHIBA TEC [Procedure for inputting adjustment values] XXX A3 Page Page Page Page Page Page Page B A Page Page Page B G [Chart TCC-1] E D F Page 1. 7 Automatic Adjustment of Gamma Correction Page 1. 8 Density Adjustment 1. 9 Color Balance Adjustment 1. 10 Offset Amount for Processing Background Page 1. 12 AI Mode Setting 1. 13 Sharpness Adjustment 1.14 High-Voltage Transformer Settings Page 1.15 Adjusting Doctor-to-Sleeve Gap 1.16 Adjusting the Scanner Section Page Note : <Relationship between wound turns and wire holder jigs> Page Page Page Page Page 1.18 Key Copy Counter (MU-8, MU-10) Page 2. PREVENTIVE MAINTENANCE (PM) 2. 1 Types of Preventive Maintenance 2. 3 Preventive Maintenance Checklist Symbols used in the checklist (For FC-22) Symbols used in the checklist (For FC-15) General Maintenance Checklist FC-22 FC-22 Color Maintenance Checklist FC-22 General Maintenance Checklist FC-15 FC-15 Color Maintenance Checklist FC-15 53 60 59 52 51 54 56 57 49 58 58 55 [Processing unit (EPU)] Developer unit K Developer unit C Developer unit M Developer unit Y January 2000 TOSHIBA TEC 2 - 7 FC-22 PREVENTIVE MAINTENANCE Page Page Page Page 2. 4 PM Kit FC-22 PM Kit FC-15 Page 2. 5 List of Adjustment Tools Test chart (No. TCC-1) 100 9 Scanner carriage jig 100 10 3. PRECAUTIONS FOR STORING & HANDLING SUPPLIES 3.1 Precautions for Storing TOSHIBA Supplies 3.2 Checking and Cleaning of the Photoconductive Drum 3.3 Checking and Cleaning of the Drum Cleaning Blade and Transfer Belt Clean- ing Blade 3.4 Checking and Replacing the Oil Roller and Cleaning Roller of Fuser Section 3.5 Checking and Cleaning of the Fuser Rollers Page 4. TROUBLESHOOTING 4.1 Troubleshooting Based on Error Code Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page FC-22 TROUBLESHOOTING 4 - 54 January 2000 TOSHIBA TEC 4.2 Troubleshooting of Image (1) Color deviation <Symptoms> January 2000 TOSHIBA TEC 4 - 55 FC-22 TROUBLESHOOTING FC-22 TROUBLESHOOTING 4 - 56 January 2000 TOSHIBA TEC (2) Uneven pitch and blur <Symptoms> January 2000 TOSHIBA TEC 4 - 57 FC-22 TROUBLESHOOTING Page January 2000 TOSHIBA TEC 4 - 59 FC-22 TROUBLESHOOTING (3) Defect of image density, color reproduction and gray balance FC-22 TROUBLESHOOTING 4 - 60 January 2000 TOSHIBA TEC (4) Background Fogging AB January 2000 TOSHIBA TEC 4 - 61 FC-22 TROUBLESHOOTING Moire Lack of sharpness (5) Moire/lack of sharpness (6) Toner offset Page FC-22 TROUBLESHOOTING 4 - 64 January 2000 TOSHIBA TEC (8) Poor fusing January 2000 TOSHIBA TEC 4 - 65 FC-22 TROUBLESHOOTING (9) Blank copy FC-22 TROUBLESHOOTING 4 - 66 January 2000 TOSHIBA TEC (10) Solid copy January 2000 TOSHIBA TEC 4 - 67 FC-22 TROUBLESHOOTING (11) White banding (in feeding direction) FC-22 TROUBLESHOOTING 4 - 68 January 2000 TOSHIBA TEC (12) White banding (at right angles to feeding direction) January 2000 TOSHIBA TEC 4 - 69 FC-22 TROUBLESHOOTING (13) Skew (slantwise copying) FC-22 TROUBLESHOOTING 4 - 70 January 2000 TOSHIBA TEC (14) Color banding (in feeding direction) January 2000 TOSHIBA TEC 4 - 71 FC-22 TROUBLESHOOTING (15) Color banding (at right angles to feeding direction) FC-22 TROUBLESHOOTING 4 - 72 January 2000 TOSHIBA TEC (16) White spots Feeding direaction January 2000 TOSHIBA TEC 4 - 73 FC-22 TROUBLESHOOTING (17) Poor image transfer FC-22 TROUBLESHOOTING 4 - 74 January 2000 TOSHIBA TEC (18) Uneven image density January 2000 TOSHIBA TEC 4 - 75 FC-22 TROUBLESHOOTING (19) Faded image (low density, color reproduction defect, gray balance defect) FC-22 TROUBLESHOOTING 4 - 76 January 2000 TOSHIBA TEC (20) Image dislocation in feeding direction January 2000 TOSHIBA TEC 4 - 77 FC-22 TROUBLESHOOTING (21) Image jittering FC-22 TROUBLESHOOTING 4 - 78 January 2000 TOSHIBA TEC (22) Poor cleaning January 2000 TOSHIBA TEC 4 - 79 FC-22 TROUBLESHOOTING (23) Uneven light distribution FC-22 TROUBLESHOOTING 4 - 80 January 2000 TOSHIBA TEC (24) Blotched image 5. FIRMWARE UPDATING 5.1 [ 3 ][ 9 ] Mode Operation Page Page Page Page Page Page Page Page 1 1 2 FC-22 FIRMWARE UPDATING 5 - 10 January 2000 TOSHIBA TEC 2 5.1.4 Screen details The following screen will be displayed in [ 3 ][ 9 ] mode. January 2000 TOSHIBA TEC 5 - 11 FC-22 FIRMWARE UPDATING In the case of 1 - 6: 1 1 2 3 4 2 3 2 In the case of #1- #3: 1 3 4 2 3 2 4 January 2000 TOSHIBA TEC 5 - 13 FC-22 FIRMWARE UPDATING In the case of 1 - 6: In the case of #1 - #3: 4 5.2 Installation Instructions for Firmware Update through PC Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page 6. WIRE HARNESS CONNECTION DIAGRAMS 6.1 AC Wire Harness 200V series SW-PWR SCNTBU