Toshiba E-Studio 5540c - Uneven Image Density 2

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8.5.20 Uneven image density 2

Fig.8-28

Fig.8-29

Feeding direction

Main Page

Service Manual1
Cautionary Labels5
Precautions for Transporting Equipment Once Unpacked7
General Description7
Precautions and Procedures for Transporting Equipment8
Checking Gaskets in the RADF8
Fixing the Scanning Section8
Installing a Drum Protection Sheet10
Installing the Sealing Material in Toner Supply Opening11
Contents17
Main Feature of E-STUDIO5540C/6540C/6550C33
Main Feature of E-STUDIO5560C/6560C/6570C33
Specifications35
General35
Copy Specifications38
First Copy Time38
Copy Speed39
System Copy Speed42
Print43
Scan43
E-Filing43
Network Fax44
Internet FAX Transmission44
Internet FAX Receiving44
Accessories45
System List (E-STUDIO5540C/6540C/6550C)46
System List (E-STUDIO5560C/6560C/6570C)47
Supplies48
Outline of the Machine49
Sectional View49
Front Side49
Rear Side51
Electric Parts Layout52
Reversing Automatic Document Feeder (RADF)52
Scanner Unit54
Bridge Unit/Paper Exit55
Fuser Related Section56
Developer Unit58
Transfer Belt Unit61
Transfer Unit62
Laser Unit63
Toner Cartridge/Waste Toner Box64
Automatic Duplexing Unit65
Cover Switches/Cover Sensor/Tru Waste Toner Box66
Bypass Feed Unit67
Paper Feeding Section68
Tandem LCF70
PC Boards71
Power Supply72
Fans73
Damp Heater74
Control Panel75
Symbols and Functions of Various Components76
Motors76
Sensors79
Switches84
Electromagnetic Spring Clutches84
Solenoids85
Lamps, Coils, and Heaters87
Thermistors, Thermopiles, and Thermostats87
Transformer88
Others88
Copy Process89
Comparison with E-STUDIO5520C/6520C/6530C90
Comparison with E-STUDIO5540C/6540C/6550C92
General Operation94
Overview of Operation94
Description of Operation95
Warming-Up95
Ready96
Drawer Feed Copying96
Bypass Feed Copying99
Interruption Copying99
Detection of Abnormality100
Types of Abnormality100
Description of Abnormality100
Add Paper100
Paper Misfeed in Bypass102
No Toner in the Cartridge102
Misfeed in Equipment103
Waste Toner Box Replacement104
Call for Service104
Hibernation Function105
Control Panel: E-STUDIO5540C/6540C/6550C106
Control Panel: E-STUDIO5560C/6560C/6570C107
Dot Matrix LCD Circuit108
Structure108
Scanner109
Construction110
Functions111
CCD Driving PC Board111
Scanning Section Control PC Board111
Automatic Original Detection Sensor111
Scanning Operation112
Principle of Original Size Detection113
Sensor Detection Points113
Laser Optical Unit114
Laser Precautions115
Slit Glass Cleaning Mechanism116
Paper Feeding System117
Tandem LCF Model118
Composition119
Drive of Rollers122
Operation of Bypass Pickup Roller123
Operation of Drawer Pickup Roller124
Paper Size Detection125
From Power-ON to Ready Status126
Ready Status126
Bypass Feeding126
Drawer Feeding127
Process Unit Related Section128
Electric Circuit Description135
Drum Surface Potential Sensor Control Circuit135
Configuration135
Self Steering Mechanism138
Operation Flow138
Image Quality Control139
Fuser Unit140
Difference of Fuser Units142
Difference for Destination of Fuser Unit143
Heat Pipe Roller144
Fuser Unit Control Circuit145
Temperature Detection Section148
Fuser Unit Error Status Counter Control148
Temperature Detection Circuit148
Abnormality Detection by the Thermistors and Thermopiles149
Exit / Reverse / Duplex Section154
Bridge Unit155
Duplexing Bridge Unit / Duplexing Unit156
Description of Operations158
Paper Transport Paths159
Upper Exit Section159
Lower Exit Section160
Drive163
Original Size Detection164
Outline164
Original Tray Width Sensor164
Original Width Detection Sensors-1,-2,-3/Original Registration Sensor164
A4 Series (Width Sizes Mixed at A3 / A4 Standard)165
A4 Series (Width Sizes Mixed at B4 / B5 Standard)165
A4 Series (Width Sizes Mixed at A4-R Standard)165
A4 Series (Width Sizes Mixed at B5-R Standard)165
LT Series (Width Sizes Mixed at LD / LT Standard)166
LT Series (Width Sizes Mixed at COMP Standard)166
LT Series (Width Sizes Mixed at LG / LT-R Standard)166
Power Supply Unit167
Operation of DC Output Circuits168
Output Channel170
Output Voltage by the Type of Connector171
Main Power Switch Line171
Cover Switch Line171
AC Line171
Fuse172
Disassembly and Replacement of Covers175
Front Lower Cover175
Front Cover175
Top Right Cover176
Right Top Cover176
Top Front Cover176
Top Left Cover177
FAX Cover177
Receiving Tray177
Left Middle Cover178
Left Top Cover178
Left Lower Cover178
Bypass Tray Unit (Removing Tray Arm)179
Duplexing Unit Front Cover179
Duplexing Unit Rear Cover179
Paper Feed Cover180
RADF Connector Cover180
Right Rear Cover180
Upper Exhaust Fan Cover181
Top Rear Cover181
Left Corner Cover182
Right Corner Cover182
Control Panel Unit183
Control Panel Rear Cover184
Display PC Board184
Shielding Plate185
Key PC Board-1187
Key PC Board-2187
Touch Panel187
Control Panel Cover188
Original Glass189
Lens Cover190
SLG Board Cooling Fan190
Automatic Original Detection Sensor191
A4 Series (APS-1, -2, -3, -C, -R)191
LT Series (APS-2, -3, -C, -R)191
Exposure Lamp192
Exposure Lamp Cooling Fan-1194
Scanner Unit Cooling Fan-1195
Exposure Lamp Cooling Fan-2196
Upper Exhaust Fan (Left)197
Upper Exhaust Fan (Right)199
Lens Unit200
Scan Motor201
Installation of Lens Unit201
Carriage-1202
Inverter Board204
Carriage Wire / Carriage-2204
Installing Carriage Wires206
Winding the Wires Around the Wire Pulley207
Carriage Home Position Sensor (S6)208
Platen Sensor (S7)208
SLG Board (SLG)208
Laser Optical Unit Cooling Fan (Front)212
Laser Optical Unit Cooling Fan (Rear)214
Shutter Motor215
Shutter Sensor (Home Position)216
Shutter Sensor (End Position)217
Disassembly and Replacement of the Polygonal Motor217
Bypass Feed Tray219
Bypass Pickup Solenoid220
Bypass Paper Sensor220
Bypass Pickup Roller221
Bypass Upper Unit222
Bypass Feed Roller223
Bypass Transport Roller223
Bypass Motor224
1St Drawer Idling Roller225
Bypass Separation Roller226
Bypass Feed Sensor228
Bypass Paper Size Detection Sensor228
Drawer Feeding Unit229
Feed Roller230
Pickup Roller230
Separation Roller231
Transport Roller231
Drawer Detection Sensor233
Drawer Feed Sensor234
Drawer Transport Sensor234
Drawer Empty Sensor235
Drawer Tray-Up Sensor235
Drawer Bottom Sensor236
Registration Roller236
Paper Dust Cleaning Brush (Registration Roller)237
Registration Guide237
Registration Sensor238
Registration Roller (Metal)239
2Nd Transfer Side Paper Clinging Detection Sensor239
Media Sensor240
Feed Cover Sensor242
Drawer242
Drawer Paper Size Detection Sensor-1/2243
Registration Motor243
Feed/Transport Drive Unit244
Transport Motor-1244
Transport Motor-2245
Feed Motor245
Feed/Transport Motor245
Paper Feed Drive Unit246
3Rd Drawer Transport Clutch/3Rd Drawer Feed Clutch246
4Th Drawer Transport Clutch/4Th Drawer Feed Clutch248
Tray-Up Motor-1249
Tray-Up Motor-2251
Transfer Belt Paper Clinging Detection Sensor252
Tandem LCF Tray-Up Motor253
Tandem LCF End Fence Motor254
Tandem LCF Standby Unit255
Tandem LCF Feeding Unit256
Stopper Opening/Closing Solenoid256
Stopper Opening/Closing Detection Sensor256
Tandem LCF Bottom Sensor259
Standby Side Tray Paper Amount Detection Sensor259
End Fence Home Position Sensor261
End Fence Stop Position Sensor262
Standby Side Empty Sensor263
Standby Side Tray Detection Sensor263
Tandem LCF Solenoid264
Pulling out the Process Unit265
Drum Cleaner Unit269
Drum Cleaning Blade271
Blade Side Seal272
Main Charger Unit273
Main Charger Grid273
Needle Electrode Cleaner273
Needle Electrode274
Discharge LED274
Sub-Hopper274
Sub-Hopper Toner Sensor275
EPU Cover275
Sub-Hopper Toner Motor276
EPU PC Board277
Drum Surface Potential Sensors Control PC Board278
Auger Lock Detection Sensor278
Main Charger Ozone Exhaust Fan-K/-C/-M/-Y279
Needle Electrode Cleaner Detection Sensor-K/C/M/Y280
Needle Electrode Cleaner Motor-K/-C/-M/-Y280
V0 Sensor Shutter Solenoid (K) (SOL)281
Drum Surface Potential Sensor (K) (S34)283
Drum Thermistor (K/Y)284
Developer Unit284
Developer Material286
Developer Sleeve288
Doctor Blade290
Auto-Toner Sensor-K/C/M/Y290
Drum Drive Unit291
Drum Motor-K292
Drum Motor-YMC292
K Drum Phase Sensor293
Color Drum Phase Sensor294
Developer Unit Motor-K/YMC295
Developer Unit Mixer Motor-K/YMC295
Developer Drive Unit295
Waste Toner Box296
Waste Toner Amount Detection Sensor297
Waste Toner Box Full Detection Sensor298
Waste Toner Box Detection Sensor299
Ozone Filter-1299
Ozone Filter-2300
Toner Filter300
Toner Motor (K/C/M/Y)302
Toner Cartridge Paddle Rotation Detection Sensor-K/C/M/Y304
Waste Toner Transport Motor304
Waste Toner Transport Unit305
Ozone Suctioning Fan306
Toner Cartridge Heat Insulation Fan307
Toner Cooling Exhaust Fan308
Temperature/Humidity Sensor309
Toner Motor Interlock Switch309
EPU Cooling Fan311
Scattered Toner Suctioning Fan311
Pulling out the Transfer Belt Unit313
2Nd Transfer Facing Roller Cleaning Pad315
Transfer Belt Cleaning Unit315
Transfer Belt Cleaning Blade317
Transfer Belt Cleaner Side Seal317
Transfer Belt Unit (TBU)318
Transfer Belt320
Transfer Belt Cam Motor322
Transfer Belt Contact/Release Detection Sensor322
1St Transfer Roller323
Cleanable Facing Roller323
Tension Roller325
2Nd Transfer Facing Roller325
2Nd Transfer Unit (TRU)328
2Nd Transfer Roller330
2Nd Transfer Roller Lubricant Unit330
2Nd Transfer Roller Cleaning Blade331
2Nd Transfer Roller Side Seal331
TRU Waste Toner Box333
TRU Waste Toner Amount Detection Sensor333
TRU Waste Toner Auger Drive Section334
TRU Waste Toner Transport Motor335
TRU Waste Toner Motor336
Transfer Belt Motor336
2Nd Transfer Roller Contact/Release Detection Sensor337
2Nd Transfer Cam Motor338
2Nd Transfer Cam Drive Unit338
Image Quality Control Unit339
Image Position Aligning Sensor (Front)339
Image Position Aligning Sensor (Center)339
Image Position Aligning Sensor (Rear)340
Image Quality Sensor340
Image Quality Shutter Solenoid341
Pressure Roller Cover347
Transport Guide-1348
Transport Guide-2348
Entrance Guide Cover349
Separation Finger349
Separation Plate350
Pressure Roller/Pressure Roller Heater Lamp (LAMP)352
Fuser Belt/ Fuser Roller/ Fuser Belt Guide/ Heat Pipe Roller356
Fuser Belt Rotation Detection Sensor362
Fuser Belt Thermostat363
Fuser Belt Edge Thermistor364
Pressure Roller Center Thermistor/ Pressure Roller Side Thermistor366
Pressure Roller Edge Thermistor366
Pressure Roller Contact/Release Sensor368
Pressure Roller Center Thermostat/ Pressure Roller Side Thermostat369
IH Coil371
Fuser Belt Thermopile373
Fuser Motor373
Pressure Roller Contact/Release Clutch374
Exit Paper Cooling Fan (Rear)376
IH Cooling Fan-1 / IH Cooling Fan-2377
IH Board378
Fuser Unit Jam Releasing LED378
VOC Filter 1379
VOC Filter 2379
Upper Exit Section Cooling Fan-1/2380
Lower Exit Section Cooling Fan-1/2380
Lower Exit Section Cooling Fan-3381
Exit Motor381
Upper Paper Exit Sensor/Upper Exit Tray Paper Full Detection Sensor382
Lower Paper Exit Sensor383
Reverse Section Stationary Jam Detection Sensor384
Reverse Path Cover Switch385
Upper Paper Exit Roller386
Lower Paper Exit Roller387
Bridge Unit Front Cover388
Bridge Unit Lower Cover389
Bridge Unit Transport Entrance Motor/ Reverse Motor390
Bridge Unit Transport Exit Motor391
Bridge Unit Upper Cover393
Bridge Unit Transport Roller-1394
Bridge Unit Transport Roller-2396
Bridge Unit Transport Roller-3397
Reverse Roller399
Bridge Unit Exit Roller-1399
Bridge Unit Exit Roller-2401
Transport Path Switching Solenoid-1401
Transport Path Switching Solenoid-2402
Bridge Unit Path Entrance Sensor403
Bridge Unit Path Exit Sensor404
Reverse Sensor405
Exit Paper Cooling Fan (Front)407
Bridge Unit Cooling Fan (Front)409
Bridge Unit Cooling Fan (Rear)410
Front Cover Opening/Closing Detection Switch411
Bridge Unit Connecting Detection Switch411
Duplexing Bridge Unit412
Duplexing Unit Opening/Closing Detection Sensor412
Reverse Path Sensor413
Duplexing Bridge Unit Transport Roller414
Duplexing Unit Upper Cover415
Duplexing Unit Front Side Cover416
Duplexing Unit Rear Side Cover416
Reversed Paper Cooling Fan416
ADU Motor-1417
ADU Motor-2418
ADU Board419
ADU Transport Roller-1419
ADU Transport Roller-2421
ADU Transport Roller-3423
Duplexing Unit Path Exit Sensor423
Fuser Transport Sensor424
Duplexing Unit Path Entrance Sensor425
Duplexing Unit Cover Opening/Closing Detection Switch426
Duplexing Unit Interlock Switch427
Interlock Switch428
Reversing Automatic Document Feeder430
Radf430
RADF Front Cover431
RADF Rear Cover432
Original Jam Access Cover433
RADF Left Cover434
Original Tray434
Original Reverse Tray435
Platen Sheet Unit435
RADF Exit Tray436
Reading Start Guide Unit437
Exit Guide / Exit/Reverse Guide / Reading End Guide438
Paper Feeder Unit440
Original Registration Roller444
Intermediate Transport Roller445
Reading Start Roller446
Reading End Roller448
Exit Roller449
Exit/Reverse Roller450
Exit Intermediate Roller451
Original Feed Motor (MR1)454
Original Feed Motor Bracket454
Read Motor455
Read Motor Bracket456
Original Reverse Motor457
Original Exit Motor457
RADF Cooling Fan459
Original Pickup Solenoid460
Original Reverse Solenoid461
Original Exit Solenoid462
Original Jam Access Cover Opening/Closing Switch463
RADF Opening/Closing Switch463
RADF Opening/Closing Sensor465
Original Empty Sensor465
Original Jam Access Cover Opening/Closing Sensor466
Feeder Lower Guide Unit466
Original Width Detection Sensor-3467
Original Width Detection Sensor-2467
Original Width Detection Sensor-1468
Original Registration Sensor468
Original Exit Sensor468
Original Tray Sensor469
Original Exit/Reverse Sensor471
Original Reverse Unit Opening/Closing Sensor472
Original Reading End Sensor473
Original Intermediate Transport Sensor473
Original Reading Start Sensor473
RADF Board475
RADF Board Bracket475
Harness Guide476
Removal and Installation of Options477
MP-2501L/A (Large Capacity Feeder)477
MJ-1103/1104 (Finisher)479
MJ-6102 (Hole Punch Unit)481
Self-Diagnistic Mode485
Overview485
Starting each Mode485
Exiting from each Mode485
State Transition Diagram of Self-Diagnosis Modes486
About each Mode486
Service UI489
Login Procedure489
In the Normal Mode489
In the Security Mode490
Service Mode Screen491
Setting/Changing Password491
Input Check (Test Mode 03)492
Example of Display During Input Check492
Output Check (Test Mode 03)493
Test Print Mode (Test Mode 04)494
Operation Procedure in Adjustment Mode (05)495
Test Print Pattern in Adjustment Mode497
Operation Procedure in Setting Mode501
Assist Mode503
Operating Procedure505
HDD Assist Mode506
Operation Procedure506
Revert Factory Initial Status HDD507
Remove Key508
File System Recovery Mode510
Check of the File System511
Recovery of the File System511
Initialize the File System512
Initialize the DB513
Displaying Various Data in the HDD513
Displaying Usage Rate of each Partition514
Initialization of Log File514
SRAM Clear Mode515
Set Serial Number516
Clear SRAM516
Reset Date and Time516
SRAM Re-Initialize Support516
List Print Mode517
Print out517
CSV Output517
List Printing518
Adjustment Mode519
Setting Mode520
PM Support Mode521
Stored Information of Pixel Counter522
Stored Information of Pixel Counter (Service Technician Reference)523
Error History524
Firmware Update Log525
Power-ON/OFF Log526
Version List527
Engine Firmware Log528
Total Counter List529
Adjustment Value/Setting Value Difference530
Pixel Counter531
Factors Affecting Toner Consumption531
Details of Pixel Counter532
Type of Calculated Data534
Relation between Pixel Count and Toner Consumption535
Pixel Counter Confirmation535
Reference Selection Screen536
Information Screen of Toner Cartridge Reference537
Information Screen of Service Technician Reference537
Data List of Toner Cartridge Reference539
Data List of Service Technician Reference540
Pixel Count Code Table (Toner Cartridge Reference)541
Pixel Count Code Table (Service Technician Reference)541
Pixel Count Code Table542
Default Setting / Restore Setting of the EFI Printer Board544
Batch Setting for Self-Diagnostic Codes545
Applicable Codes545
Setting Files545
Example545
Result Files546
Setting Adjustment549
Image Related Adjustment549
Adjustment Order549
Adjustment of the Auto-Toner Sensor550
Performing Image Quality Control552
Adjustment of Color Registration Control555
Image Dimensional Adjustment (General Description)556
Procedure to Key in Adjustment Values557
Paper Alignment at the Registration Roller558
Adjustment with Touch Panel558
Select the Drawer558
Select the Paper Size558
Adjustment by Direct Code Entry561
Printer-Related Image Dimensional Adjustment564
Reproduction Ratio of Primary Scanning Direction565
Primary Scanning Data Laser Writing Start Position566
Reproduction Ratio of Secondary Scanning Direction567
Confirmation of 05-4526-0567
Adjustment of 05-4526-0567
Image Position of Secondary Scanning Direction568
Primary Scanning Data Laser Writing Start Position at Duplexing569
Adjustment for Long-Sized Paper569
Adjustment for Short-Sized Paper569
Adjustment for Medium-Sized Paper570
Scanner-Related Image Dimensional Adjustment571
Image Distortion571
Reproduction Ratio Adjustment of Primary Scanning Direction572
Image Location of Primary Scanning Direction573
Image Location of Secondary Scanning Direction573
Top Margin574
Right Margin575
Bottom Margin576
Adjustments and Checks Using Test Chart No. TCC-1577
Points to be Measured in the Chart577
Checking Areas of the Chart and Their Descriptions578
Image Quality Adjustment (Copying Function)579
Automatic Gamma Adjustment579
Density Adjustment581
Color Balance Adjustment582
Range of the Density Area583
Gamma Balance Adjustment584
Background Adjustment585
Judgment Threshold for ACS586
Sharpness Adjustment586
Setting Range Correction587
Adjustment of Smudged/Faint Text587
Color Adjustment of Marker588
Beam Level Conversion Setting589
Maximum Toner Density Adjustment to Paper Type590
Maximum Text Density Adjustment590
Text/Photo Reproduction Level Adjustment591
Black Header Density Level Adjustment592
Black Area Adjustment in Twin Color Copy Mode592
Judgment Threshold Adjustment for Blank Original593
Background Offsetting Adjustment for RADF593
Twin Color Copy / Mono Color Copy Adjustment594
Maximum Density Adjustment for each Paper Type595
ADF Noise Reduction595
Image Quality Adjustment (Printing Function)597
Gamma Balance Adjustment (Black Mode)600
For Color Printing603
Twin Color Print (600 Dpi)604
Adjustment of Faint Text606
Upper Limit Value at Toner Saving Mode606
Maximum Toner Density Adjustment (OHP)607
Fine Line Enhancement Switchover608
“Pureblack/Puregray” Threshold Adjustment (PS)608
“Pureblack/Puregray” Threshold Adjustment (PCL)609
“Pureblack/Puregray” Threshold Adjustment (XPS)609
“Pureblack/Puregray” Threshold Adjustment (Twin Color Print)609
Toner Limit Threshold Adjustment610
Screen Switchover611
Adjustment of Smudged Text614
Thin Line Width Lower Limit Adjustment614
Color/Black Judgment Setting for Twin Color Printing Images614
Density Adjustment of Graphic Lines616
Image Quality Adjustment (Scanning Function)618
Background Adjustment (Color Mode)620
Judgment Threshold for ACS (Common for Copy and Scan)620
Fine Adjustment of Black Density622
RGB Conversion Method Selection623
Adjustment of Saturation623
Background Processing Offset Adjustment624
Adjustment of the Capacity and Image Quality of Slimpdf625
Surrounding Void Amount Adjustment625
Scanning Function626
Image Quality Adjustment (FAX Function)627
Adjustment Carriages-1 and -2 Positions629
Belt Tension Adjustment of the Scan Motor630
Adjustment of the Media Sensor Position631
Separation Roller Pressure Force Adjustment632
Adjustment Procedure of the Drawer Feeding Unit632
Adjustment Procedure of the Bypass Feed Unit633
Sheet Sideways Deviation Caused by Paper Transporting Adjustment636
Removal of the Drawer Paper Tray636
Adjustment of the Gear Holder637
Adjustment of the Rear Side Guide637
In the Case of Bypass Feeding638
Adjusting the Clearance of the Paper and Side Guides639
High-Voltage Transformer Setting640
Adjustment of the Doctor-Sleeve Gap641
Adjustment of the Degree of the Transfer Belt Unit Parallelization643
Gap Adjustment for Fuser Belt Thermostats644
Gap to be Confirmed645
Gap Confirmation Jig645
Adjustment Procedure646
Gap Adjustment for Pressure Roller Thermistors648
Gap Adjustment for Pressure Roller Thermostats651
Gap Adjustment for Separation Plate654
RADF Position Adjustment660
RADF Height Adjustment665
Adjustment665
RADF Image Skew Adjustment667
Simplex Copying667
Duplex Copying668
RADF Leading Edge Position Adjustment669
RADF Horizontal Position Adjustment671
RADF Copy Ratio Adjustment672
RADF Opening/Closing Switch Adjustment673
Original Reading Start Sensor Adjustment674
Automatic Adjustment674
Manual Adjustment674
Platen Sheet677
Preventive Maintenance679
PM Display679
PM Display Conditions679
PM Display Contents680
Counter Clearing681
General Descriptions for PM Procedure682
Operational Flow683
Operational Screen684
Main Screen684
Sub Screen (for Other than the Developer Unit)685
Sub Screen (for the Developer Unit)686
Sub Unit Detail Screen (for the Developer Material)687
Clear Screen688
Access Tree689
Preventive Maintenance Checklist693
Feed Unit695
Duplexing Unit697
Main Charger699
Drum / Cleaner Unit / Filter700
F1: Whole Cleaner Unit701
F2: Drum701
F3: Drum Cleaning Blade702
F4: Blade Side Seal702
F5: Recovery Blade703
F7:Drum Surface Sensor/G8:Drum Surface Potential Sensor Shutter703
F13: Toner Filter703
Developer Unit (K, Y, M, and C)704
G3: Developer Material706
Transfer Belt Unit / Transfer Belt Cleaning Unit708
I1: Transfer Belt708
I2: 1St Transfer Roller709
I3: Cleaning Facing Roller, I4: 2Nd Transfer Facing Roller709
I6: Tension Roller, I7: Idling Roller709
I8: Transfer Belt Cleaning Blade709
L10: Transfer Belt Cleaner Side Seal710
J1:Image Quality Sensor, J2:Sensor Shutter711
J3:Image Position Aligning Sensor711
2Nd Transfer Roller Unit712
K1: 2Nd Transfer Roller713
K3: 2Nd Transfer Roller Side Seal713
K8: Grounding Plate714
K9: Paper Dust Cleaning Brush (Registration Roller)714
K12: TRU Waste Toner Auger Drive Gear714
L1: Pressure Roller, M6: Fuser Belt715
L2: Pressure Roller Separation Finger716
L3, L4: Pressure Roller Thermistor716
L11: Separation Plate717
L13: Fuser Unit Gear717
L14: Fuser Belt Thermopile717
L15: Rotor717
Paper Exit Unit718
Lcf (Mp-2501)720
P5: Brush Unit721
P6: Paper Path Section721
Symbols/Value Used in the Checklist722
A1: Original Glass, A2: RADF Original Glass723
B6: Drive Gear725
D3: Separation Roller727
E1: Main Charger Case728
Storage of Supplies and Replacement Parts751
Pm Kit752
Maintenance Part List753
Grease List755
Operational Items in Overhauling755
Machine Refreshing Checklist756
Error Code and Troubleshooting757
If a Problem Continues Even after Performing All Troubleshooting757
Collection of Debug Logs with a USB Device758
Traceability Label760
Management No.760
Applicable Units760
Label Attachment Position761
Error Code List762
Jam762
Service Call772
Error in Internet FAX / Scanning Function782
Internet FAX Related Error782
RFC Related Error782
Electronic Filing Related Error783
Remote Scanning Related Error784
E-Mail Related Error784
File Sharing Related Error785
E-Mail Reception Related Error787
Printer Function Error789
Topaccess Related Error/Communication Error with External Application790
MFP Access Error792
Maintenance Error792
Network Error793
Diagnosis and Prescription for each Error Code798
Check Item798
Paper Transport Jam798
Paper Misfeeding801
Paper Transport Jam806
Other Paper Jam822
Cover Open Jam831
RADF Jam834
Jam in Bridge Unit842
Paper Jam in Finisher Section844
Paper Jam in Saddle Stitcher Section851
Paper Jam in Puncher Unit854
Paper Feeding System Related Service Call868
Scanning System Related Service Call871
Fuser Unit Related Service Call874
Communication Related Service Call883
RADF Related Service Call887
Circuit Related Service Call889
Laser Optical Unit Related Service Call894
Finisher Related Service Call897
Image Control Related Service Call913
Copy Process Related Service Call930
Other Service Call941
Other Errors1037
Drum Surface Potential Sensor Control Related Troubleshooting1037
Troubleshooting at Unpacking1041
Equipment Operation Disabled after Installation of Option(S)1044
Wireless LAN Connection Disabled1044
“Start Page” Printing Disabled1045
When the Duplexing Unit Cover Open Display Cannot be Released1045
Operation of Control Panel Locked at Power-ON and Cannot be Canceled1045
Troubleshooting for One-Time Dongle1045
Countermeasure for Stain on Paper Back Side1046
Measures against Exit Paper Side Deviation1046
Troubleshooting for Abnormal Sound from Fuser Unit1048
“Authentication Failed” Is Displayed1048
Hard Disk Full Error “H04” Is Displayed1048
When the First Copy Time/Print Output Time in MFP1048
Error Code “M00” Is Displayed While Updating Firmware1049
Troubleshooting for the Image1050
Color Deviation1050
Uneven Pitch and Jitter Image1052
Black Spot / Color Point1054
Poor Image Density, Color Reproduction and Gray Balance1055
Background Fogging1057
Moire/Lack of Sharpness1059
Toner Offset1061
Blurred Image1063
Poor Fusing1064
Blank Print1065
Solid Print1067
White Banding or White Void (in Feeding Direction)1068
White Banding (at Right Angles to Feeding Direction)1070
Skew (Slantwise Copying)1072
Color Banding (in Feeding Direction)1073
Color Banding (at Right Angles to Feeding Direction)1075
White Spots1076
Poor Transfer1078
Uneven Image Density 11080
Uneven Image Density 21082
Faded Image (Low Density)1084
Image Dislocation in Feeding Direction1086
Image Jittering1087
Poor Cleaning1089
Uneven Light Distribution1090
Blotched Image1091
Stain on the Paper Back Side1092
White Void in the Halftone1095
Paper Wrinkle1096
Residual Image1097
Feathered Image1099
Low Density Image (Rear Side)1101
Roughness1103
Image Tilting on Leading Edge1104
Removal and Installation of PC Boards/Hdd1107
SYS Board Cover1107
SYS Board (SYS)1107
SYS Board Case1108
SYS Board Cooling Fan1109
IMG Board (IMG)1110
LGC Board (LGC)1111
LGC Board Case1112
PFC Board (PFC)1113
PFC Board Case1114
Hard Disk (HDD)1115
Normal Hard Disk (SATA-HDD)1115
Security Hard Disk (ADI-HDD)1116
HDD Cooling Fan1119
SRAM Board for LGC Board1121
SRAM Board for SYS Board1122
Switching Regulator (PS)1124
High-Voltage Transformer-1 (HVT1)1125
High-Voltage Transformer-2 (HVT2)1126
FIL Board1127
Precautions, Procedures and Settings for Replacing PC Boards and HDD1128
Precautions When Replacing PC Boards1128
HDD Fault Diagnosis1129
Precautions and Procedures When Replacing the HDD1131
Back up in HDD1132
Print out “Function List for Maintenance”1132
Print out “Function” List1132
Erase HDD1133
Reset User’s Setting Items and Restore Data/Information1134
Reset “Function List for Maintenance”1134
Reset “Function” List1134
Adjust Image Quality1135
Precautions and Procedures When Replacing the SYS Board1136
Return License1136
Replace the SYS Board1137
Update System ROM Version (Jig)1137
Update System ROM Version1137
Restore ADI Key1137
Restore Encryption Key1138
Restore License1138
Reinstall License1138
Check ROM Versions1139
Procedures and Settings When Replacing the SLG Board1140
Precautions and Procedures When Replacing SRAM Board1141
Backup SRAM1142
Replace SRAM Board1142
Initialize SRAM System Storage Area1143
Restore SRAM1143
Clear SRAM Update Error Flags1143
Backup ADI Key1144
Backup Encryption Key1144
Backup License1144
Initialize SRAM Board1145
Enable HDD Encryption1146
Initialize Settings When FAX Unit Is Installed1146
Set Date and Time1146
Set EFI Printer Board1147
Lgc Board1148
Firmware Confirmation after the PC Board/Hdd Replacement1153
Set Line Adjustment Mode1153
License Re-Registration Using the One-Time Dongle1154
Re-Registration When the Board Is Replaced1154
Re-Registration When the Equipment Is Replaced Due to Malfunction1154
Precautions for Installation of GP-10701156
Precautions When Disposing of the HDD1156
Precautions When Disposing of the SYS Board1156
Precautions When Disposing of the SRAM Board1156
Precautions When Disposing of the SRAM Board (for LGC Board)1157
Remote Service1159
Auto Supply Order1159
Setting Item1160
Setting Procedure1162
Order Sheet Format1172
Fax1172
E-Mail1173
Result List1174
Service Notification1176
Setting1176
Preparation1176
Items to be Notified1183
Total Counter Notification / PM Counter Notification by E-Mail1183
Total Counter Notification / PM Counter Notification by FAX1186
Toner Near-Empty Notification by E-Mail1190
Toner Near-Empty Notification by FAX1193
Service Call Notification1197
Firmware Updating1199
Equipment1199
Options1199
Firmware Updating with a USB Device1204
Updating Methods1204
Firmware Type and Data File Name for Updating1204
Standard Update1204
Differential Items Update1205
Patch Update1205
Folder Configuration of a USB Device1206
Update Procedure1210
Updating Firmware1210
Confirmation of the Updated Data1217
Display During the Update1217
System ROM1218
Examples1219
Firmware Updating with PWA-DWNLD-350-JIG11220
Writing the Data to the Download Jig1222
Precautions When Writing the System ROM Data1223
Precautions When Writing the Engine/Pfc ROM Data1224
Engine ROM1224
Pfc Rom1224
Firmware Updating with K-PWA-DLM-3201231
Scanner ROM1232
RADF Firmware1235
Finisher Firmware1237
Saddle Stitcher Firmware1239
Hole Punch Unit Firmware1241
Checking the Hole Punch Position1241
Firmware Update1242
Converter Firmware1244
Fax Unit Firmware1246
When Firmware Updating Fails1250
Procedure1250
Flow Chart for Correcting USB Update Failure1251
When the Update of the System ROM (os Data) Failed1251
When the Update of Master Data (HDD Program Data) Failed1252
When Update of Engine ROM/PFC ROM Failed/Scanner ROM/RADF ROM Failed1253
Backup Function1255
Data Cloning1255
Backup Files1256
Cloning Procedure1256
Restore Procedure1257
Confirmation of the Error1258
AES Data Encryption Function Setting1260
Enable Data Encryption Function1262
Procedure for Disabling Data Encryption Function1263
Procedure for Discarding HDD When Data Encryption Function Is Enabled1263
Check Actuation of Data Encryption Function Setting1263
High Security Mode1264
Prior Confirmation1264
Procedure for Entering the High Security Mode1264
Precautions1265
External Counters1267
Signal1267
Pin Layout1267
Details of the Signals1269
Notices1271
Setting Code1271
Setting Value Change and Restrictions When Using the Card Controller1271
Setting Value Change and Restrictions When Using the Coin Controller1271
Restrictions When Using the External Counter1272
Wire Harness Connection1273
AC Wire Harness1273
DC Wire Harness (E-STUDIO5540C/6540C/6550C)1275
DC Wire Harness (E-STUDIO5560C/6560C/6570C)1276
Relation of Shutter Motor End Position Signals and Home Position D1280
Relation between IH Error Signals and IH Interlock Switch1280
Relation of Signals of Duplexing Unit Cover Opening/Closing Detection1280
Relation between IH Board Destination Detection Signals-1 and -01283
Relation between Status of Original Tray Width Sensor and Paper Size1283
Relation between Status of Bypass Paper Width Sensor and Paper Size1286

Toshiba E-Studio 5540c - Uneven Image Density 2

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