502
TSM Océ 3121
Functional description
Switching the charging roller ON and OFF
The charging roller is switched ON and OFF by the charging roller ON/OFF
signal (HVPDC) from the DC control PBA.
The primary side of the main transformer (T101) on the power supply PBA is
controlled by the CPU (Q605). When the HVPDC signal is sent to the power
supply PBA, the CPU (Q605) generates the DC control signal (PPWM) to
switch ON the secondary side of T101. A DC bias is applied to the charging
roller.
Then, the CPU generates the AC control signal (PAPWM) following the com-
mands created via the serial communications with the DC control PBA. As a
result, the transformer T300 applies AC to the charging roller.
Controlling the charging bias
The output values of the DC and the AC applied to the charging roller are con-
trolled by:
■
the DC control signal (PDPWM)
■
the AC control signal (PAPWM)
These are pulse signals, generated by the CPU (Q605).
For the DC bias, the output voltage value is returned to the CPU (Q605). This
continuously varies the duty ratio of the DC control signal. Thereby controlling
it to a specific voltage (constant voltage control).
For the AC bias, the current value of the AC output is sent to the AC drive cir-
cuit.
The AC drive circuit uses the reference signal (AC control signal PAPWM) and
the value of the AC current to generate signals to drive the transformer T300.
These limit the AC bias to a constant current.
Correcting the Apparent Surface Voltage on the Drum
The apparent surface voltage of the drum fluctuates in relation to changes in
the ambient temperature inside the machine. This is corrected by varying the
charge voltage. The temperature is measured by the thermistor, positioned on
the rear frame of the copier. The data is sent to the CPU on the DC control
PBA.
The CPU and the DC control PBA compute the data, and the results are sent to
the power supply PBA in serial communication mode.
The power supply PBA, in response, uses the data to determine the DC charge
level.
Содержание 3121
Страница 1: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 3121 3122...
Страница 6: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc INSTALLATION...
Страница 72: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc IMAGE QUALITY...
Страница 76: ...Confidential 1998 Oc Technologies B V ed 1 Image quality 3 2 Image adjustment basic procedure...
Страница 93: ...20 TSM Oc 3121 Image quality Isolating a PBA printer image fault...
Страница 94: ...Confidential 1998 Oc Technologies B V ed 1 Image quality 21 5 Isolating a PBA FAX image fault...
Страница 105: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc TROUBLE SHOOTING...
Страница 108: ...Confidential 2000 Oc Technologies B V ed 2 Trouble shooting RDF Self Diagnosis FAX related error codes...
Страница 188: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc GENERAL...
Страница 201: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 01 PHOTOCONDUCTOR...
Страница 205: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 02 CHARGING...
Страница 210: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 04 EXPOSURE...
Страница 214: ...Confidential 1998 Oc Technologies B V ed 1 04 Exposure 403 4 Loosen the set screw 4 and remove the cable front and rear...
Страница 239: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 05 DEVELOPING...
Страница 242: ...302 TSM Oc 3121 Adjustments...
Страница 251: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 06 TRANSFER...
Страница 260: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 07 CLEANING...
Страница 261: ...Confidential 1998 Oc Technologies B V ed 1 07 Cleaning Contents Functional description 1 Waste Toner 501...
Страница 263: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 08 IMAGE PROCESSING...
Страница 299: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 10 RDF...
Страница 391: ...510 TSM Oc 3121 Functional description 7 Inputs to the RDF Control PBA 1 Inputs to the RDF Control PBA...
Страница 392: ...Confidential 1998 Oc Technologies B V ed 1 10 RDF 511 2 Inputs to the RDF Control PBA...
Страница 393: ...512 TSM Oc 3121 Functional description 8 Outputs from the RDF Control PBA 1 Outputs from the RDF Control PBA...
Страница 398: ...Confidential 1998 Oc Technologies B V ed 1 10 RDF 517 A4 A B configured RDF INCH configured RDF...
Страница 423: ...542 TSM Oc 3121 Functional description delivery roller 2nd document 3rd document Feeding belt 2nd document 1st document...
Страница 427: ...546 TSM Oc 3121 Functional description e Sequence of operations page composition fax mode...
Страница 432: ...Confidential 1998 Oc Technologies B V ed 1 10 RDF 551 Sequence of Operations small sizes continuous pick up and return...
Страница 433: ...552 TSM Oc 3121 Functional description Sequence of Operations small sizes return...
Страница 450: ...Confidential 1998 Oc Technologies B V ed 1 10 RDF 701 Electrical diagrams...
Страница 451: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 11 DIGITAL DOCUMENT HANDLING...
Страница 462: ...510 TSM Oc 3121 Functional description Inputs to and Outputs from the FAX Board...
Страница 465: ...Confidential 1998 Oc Technologies B V ed 1 11 Digital document handling 513...
Страница 468: ...516 TSM Oc 3121 Functional description CORE IP Board...
Страница 469: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 12 PAPER...
Страница 487: ...506 TSM Oc 3121 Functional description The upper cassette The upper cassette cassette pick up PBA...
Страница 509: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 13 SPECIALITY INPUT...
Страница 519: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 16 DUPLEX...
Страница 537: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 17 FIXING...
Страница 542: ...402 TSM Oc 3121 Dis assembly 8 Remove the two screws 7 Take out the fuser drive 6...
Страница 569: ...512 TSM Oc 3121 Functional description Brush Hinge arm...
Страница 570: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 19 DELIVERY...
Страница 606: ...Confidential 1998 Oc Technologies B V ed 1 19 DELIVERY 701 Electrical diagrams...
Страница 607: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 21 SORTER...
Страница 721: ...Confidential 1998 Oc Technologies B V ed 1 21 SORTER 701 Electrical diagrams...
Страница 722: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 22 POWER CONTROL...
Страница 733: ...Confidential 1998 Oc Technologies B V ed 1 22 Power Control 507 Image processor PBA 2 3 inputs and outputs...
Страница 734: ...508 TSM Oc 3121 Functional description Image processor PBA 3 3 inputs and outputs...
Страница 735: ...Confidential 1998 Oc Technologies B V ed 1 22 Power Control 509 DC Control PBA 1 3 inputs...
Страница 736: ...510 TSM Oc 3121 Functional description DC Control PBA 2 3 inputs...
Страница 737: ...Confidential 1998 Oc Technologies B V ed 1 22 Power Control 511 DC Control PBA 3 3 inputs...
Страница 740: ...514 TSM Oc 3121 Functional description DC control PBA 3 3 outputs...
Страница 752: ...526 TSM Oc 3121 Functional description Cycle of SLEEP Mode States SLEEP 1 SLEEP 2 Top SLEEP 1 Bottom SLEEP 2...
Страница 768: ...Confidential 1998 Oc Technologies B V ed 1 22 Power Control 613 13 CORE IP PBA J503 J504 J510 J501 J502...
Страница 769: ...Confidential 1998 Oc Technologies B V ed 1 22 POWER CONTROL 1 701 Electrical diagrams...
Страница 770: ...Confidential 1998 Oc Technologies B V ed 1 22 POWER CONTROL 2 702...
Страница 771: ...Confidential 1998 Oc Technologies B V ed 1 22 POWER CONTROL 3 703...
Страница 772: ...Confidential 1998 Oc Technologies B V ed 1 22 POWER CONTROL 4 704...
Страница 773: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc 23 DRIVE...
Страница 778: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc MISCELLANEOUS...
Страница 785: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc PREVENTIVE MAINTENANCE...
Страница 793: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc TECHNICAL DATA...
Страница 809: ...Technical Service Manual Oc 3121 3122 Oc Oc Oc Oc SDS DESCRIPTION...