Oki B721 Maintenance Manual page 6

Oki Data CONFIDENTIAL
6.5.2.(18) Wiring diagram .................................................................6-65
6.5.3 Troubleshooting the abnormal images...............................................6-66
6.5.3.(1) Color has faded-out and blurred entirely.
(Refer to Figure 6-2 A.) .....................................................6-67
6.5.3.(2) Stain on white print. (Refer to Figure 6-2 B.) ....................6-68
6.5.3.(3) White print (Refer to Figure 6-2 C.) ..................................6-69
6.5.3.(4) Black banding/black streaking in vertical direction ...........6-70
6.5.3.(5) Periodic abnormalities (Refer to Figure 6-2 E.) ................6-70
6.5.3.(6) Solid black printing. ...........................................................6-71
6.5.4 Image Quality Issues .........................................................................6-72
6.5.5 Network troubleshooting ....................................................................6-73
6.5.5.1 Connection error occurs with the Web browser ....................6-73
6.5.5.2 Print operation is not possible ..............................................6-77
6.5.5.3 Cannot create Certificate .......................................................6-78
6.5.5.4 Installation of Certificate is not possible ................................6-78
6.5.5.5 Other questions ...................................................................6-80
6.5.5.6 Restrictions when using Internet Explore 7 ..........................6-82
6.5.6 Wireless Troubleshooting ...................................................................6-83
6.6 Paper cassette switches and paper size correlation table .............................6-84
7. Connection diagrams ..........................................................7-1
7.1 Resistance value check ...................................................................................7-2
7.2 Parts location ...................................................................................................7-5
7.3 F/W version number .......................................................................................7-12
7.3.1 Maintenance board indication stamp .................................................7-12
45487001TH Rev.1
CONTENTS
vi /