Toshiba e-STUDIO656 - Page 19

© 2012 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO556/656/756/856(Ver03)
CONTENTS
9
8.3.4 Cover open jam ............................................................................................... 8-63
8.3.5 RADF jam ........................................................................................................ 8-66
8.3.6 Finisher jam ..................................................................................................... 8-70
8.3.7 Paper feeding system related service call ....................................................... 8-85
8.3.8 Scanning system related service call............................................................... 8-89
8.3.9 Fuser unit related service call .......................................................................... 8-91
8.3.10 Communication related service call ................................................................. 8-95
8.3.11 RADF related service call ................................................................................ 8-97
8.3.12 Laser optical unit related service call............................................................... 8-98
8.3.13 Finisher related service call ........................................................................... 8-102
8.3.14 Service call for others .................................................................................... 8-120
8.3.15 Error in Internet FAX / Scanning Function ..................................................... 8-143
8.3.16 Error in Printer Function................................................................................. 8-167
8.3.17 TopAccess related error/Communication error with external application ......8-173
8.3.18 MFP access error .......................................................................................... 8-178
8.3.19 Maintenance error.......................................................................................... 8-186
8.3.20 Network error ................................................................................................. 8-197
8.3.21 Troubleshooting for image quality control...................................................... 8-209
8.3.22 Troubleshooting for surface potential control................................................. 8-214
8.3.23 Troubleshooting for remaining toner detection sensor .................................. 8-217
8.4 Troubleshooting for the Image ...................................................................................... 8-218
8.4.1 Abnormality of image density / Gray balance ................................................ 8-218
8.4.2 Background fogging....................................................................................... 8-219
8.4.3 Moire/lack of sharpness................................................................................. 8-221
8.4.4 Toner offset.................................................................................................... 8-222
8.4.5 Blurred image ................................................................................................ 8-224
8.4.6 Poor fusing..................................................................................................... 8-225
8.4.7 Blank copy ..................................................................................................... 8-226
8.4.8 Solid copy ...................................................................................................... 8-227
8.4.9 White banding or white void (in the feeding direction) ................................... 8-228
8.4.10 White banding (at right angle with the feeding direction)............................... 8-229
8.4.11 Skew (inclined image).................................................................................... 8-230
8.4.12 Black banding (in the feeding direction)......................................................... 8-231
8.4.13 Black banding (at right angle with the feeding direction) ............................... 8-232
8.4.14 White spots .................................................................................................... 8-233
8.4.15 Poor image transfer ....................................................................................... 8-235
8.4.16 Uneven image density ................................................................................... 8-236
8.4.17 Faded image (low density, abnormal gray balance) ...................................... 8-237
8.4.18 Image dislocation in feeding direction............................................................ 8-239
8.4.19 Jittering image ............................................................................................... 8-240
8.4.20 Poor cleaning................................................................................................. 8-241
8.4.21 Uneven light distribution ................................................................................ 8-242
8.4.22 Blotched image .............................................................................................. 8-243
8.4.23 Black banding at the leading edge of scanned images ................................. 8-244
8.5 Other errors................................................................................................................... 8-245
9. REPLACEMENT OF PC BOARDS / HDD .................................................................... 9-1
9.1 Installation and Separation of PC Boards / HDD .............................................................. 9-1
9.1.1 SYS board cover................................................................................................ 9-1
9.1.2 System control PC board (SYS board) .............................................................. 9-2
9.1.3 SYS board case................................................................................................. 9-3
9.1.4 Logic PC board (LGC board) ............................................................................. 9-3
9.1.5 Hard disk (HDD) ................................................................................................ 9-4
9.1.6 LGC board case................................................................................................. 9-5
9.1.7 High-voltage transformer (HVT) / LGC board case ........................................... 9-6
9.1.8 Switching regulator (PS) .................................................................................... 9-6
9.1.9 SRAM board (RAM-S) ...................................................................................... 9-6
9.2 Precautions, Procedures and Settings for Replacing PC Boards and HDD ..................... 9-8
9.2.1 Precautions when replacing PC boards............................................................. 9-8