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3.19.2 ARDF..........................................................................................3-179
ARDF side-to-side and leading edge registration..............................3-179
3.19.3 REGISTRATION.........................................................................3-180
Image Area .......................................................................................3-180
Leading Edge....................................................................................3-180
Side to Side.......................................................................................3-180
Adjustment Standards.......................................................................3-180
Paper Registration Standard.............................................................3-180
Adjustment Procedure.......................................................................3-181
3.19.4 COLOR REGISTRATION ...........................................................3-182
Forced MUSIC Adjustment ...............................................................3-182
Adjustment of Line Speed for Thick Paper........................................3-182
Color Registration Test and Error Adjustment...................................3-182
3.19.5 SKEW ADJUSTMENT AFTER LASER UNIT REPLACEMENT..3-183
3.19.6 PRINTER GAMMA CORRECTION.............................................3-185
Copy Mode........................................................................................3-185
Printer Mode .....................................................................................3-189
Adjustment Reference For Gamma Correction .................................3-190
3.20 TOUCH SCREEN CALIBRATION .......................................................3-191
4. TROUBLESHOOTING.................................................................4-1
4.1 PROGRAM DOWNLOAD ..........................................................................4-1
4.1.1 OVERVIEW ......................................................................................4-1
4.1.2 RECOVERY METHODS...................................................................4-1
4.1.3 DOWNLOAD ERROR CODES .........................................................4-2
4.1.4 IMPORTANT SP CODES .................................................................4-5
4.2 SPECIAL PROCEDURES .........................................................................4-6
4.2.1 SP2181 030 (ALIGNMENT RESULT) ERRORS...............................4-6
4.2.2 COLOR REGISTRATION ERROR ADJUSTMENT ........................4-10
Color Registration Error Correction.....................................................4-10
Color Skew Error Correction ...............................................................4-12
Overall Check .....................................................................................4-13
Color Registration at the Left and Right Folds of the Test Pattern ......4-13
4.2.3 SP3812 001 (DevSetup Execute) ERRORS...................................4-15
4.2.4 PROCESS CONTROL TROUBLESHOOTING...............................4-16
Summary of Process Control SC Codes.............................................4-16
Process Control Self-Check: SP3821 .................................................4-17
4.2.5 COLOR ADJUSTMENT FOR CONNECTED COPIERS.................4-23
4.3 SERVICE CALL CONDITIONS................................................................4-25
4.3.1 SERVICE MODE LOCK/UNLOCK..................................................4-25
4.3.2 SERIES SERVICE CALL CONDITIONS.........................................4-26