41309401TH Rev.4
380 /
Image drum unit
Agitation bar (iron)
Magnet
Toner sensor lever
Photointerrupter
Hardware Configuration of Toner Sensor
t1
T
Magnet draw-in
Toner sensor
4.
Toner Low Detection
• Hardware configuration of toner sensor
The figure below shows the hardware configuration of the toner sensor.
• Toner detection method
(1) Toner sensor monitoring conditions are shown in the figure below.
Caution: The toner sensor is not monitored when the drum is inactive.
(a)
When the toner-low state continues twice, Toner Low occurs. (This state is monitored
at a cycle of 40 milliseconds.)
(b)
When the toner-full state continues twice, Toner Low is released. (This state is
monitored at a cycle of 40 milliseconds.)
(c)
When the toner sensor does not change over two cycles (T
×
2), the toner sensor alarm
state occurs.
(d)
After the EP unit has been replaced (after the drum counter has been reset), Toner Low
is not detected when the drum counter indicates 1 to 100 counts.
(2) The basic rotation cycle of the toner sensor is as follows:
Basic rotation cycle of toner sensor
T time
4.9 sec.
t1 > 1.2 sec.
1.2 sec. > t1 >
Toner low time
Toner full time
Summary of Contents for OKIFAX4550
Page 156: ...41309401TH Rev 4 156 Figure 4 2 Appearance of the OKIFAX4550 OKIOFFICE87...
Page 428: ...41309401TH Rev 4 428 SECTION 1 CABINET ASSEMBLY OKIFAX4550 OKIOFFICE87...
Page 431: ...41309401TH Rev 4 431 SECTION 2 UNIT PRINTER...
Page 433: ...41309401TH Rev 4 433 SECTION 3 UNIT 051 OPE PANEL...
Page 435: ...41309401TH Rev 4 435 SECTION 4 OPEPANEL OPERATION PANEL ASSEMBLY...
Page 437: ...41309401TH Rev 4 437 SECTION 5 FRAME ASSEMBLY SCANNER L...
Page 439: ...41309401TH Rev 4 439 SECTION 6 PLATE ASSEMBLY SCANNER B...
Page 441: ...41309401TH Rev 4 441 SECTION 7 PLATE ASSEMBLY SCANNER R...
Page 443: ...41309401TH Rev 4 443 SECTION 8 FRAME ASSEMBLY SCANNER U...
Page 445: ...41309401TH Rev 4 445 SECTION 9 COVER ASSEMBLY TOP...
Page 447: ...41309401TH Rev 4 447 SECTION 10 PLATE ASSEMBLY BASE...
Page 449: ...41309401TH Rev 4 449 SECTION 11 PRINTER BASE FRAME UNIT Heat assy...
Page 452: ...41309401TH Rev 4 452 SECTION 12 PRINTER HEAT ASSY...
Page 454: ...41309401TH Rev 4 454 SECTION 13 CABLES...
Page 457: ...41309401TH Rev 4 457 46F PCB Assy 1 9 41196601...
Page 466: ...41309401TH Rev 4 466 R46 PCB Assy 1 10 41033201...
Page 476: ...41309401TH Rev 4 476 04W PCB Assy 1 3 40071401...
Page 479: ...41309401TH Rev 4 479 EN9 PCB Assy 1 6 41144301...
Page 485: ...41309401TH Rev 4 485 INU PCB Assy 41144501 US 1 4 41144502 INT 1 5...
Page 493: ...41309401TH Rev 4 493 MPW1546 120V PCB Assy 1 5 SIPS1303...
Page 498: ...41309401TH Rev 4 498 MPW1446 230V PCB Assy 1 6 SIPS1302...
Page 504: ...41309401TH Rev 4 504 P2H PCB Assy 1 4 40599101...
Page 508: ...41309401TH Rev 4 508 P6L PCB Assy 1 3 40386701...
Page 511: ...41309401TH Rev 4 511 G4N PCB Assy 1 5 41033701...
Page 585: ...41309401TH Rev 4 585 Figure H 7 1 2 RTC Time Read Figure H 7 2 2 RTC Time Set...
Page 587: ...41309401TH Rev 4 587 Figure H 9 Figure H 10 1 3...
Page 588: ...41309401TH Rev 4 588 Figure H 10 2 3 Figure H 10 3 3...
Page 589: ...41309401TH Rev 4 589 Figure H 11 1 3 Figure H 11 2 3...
Page 590: ...41309401TH Rev 4 590 Figure H 12 Figure H 11 3 3...
Page 591: ...41309401TH Rev 4 591 Figure H 13 1 2 Figure H 13 2 2...
Page 592: ...41309401TH Rev 3 592 592 Figure H 14 1 2 Figure H 14 2 2...
