Development
D017/D018/D019/D020 6-44
SM
Mode
Sensor control 3 (SP921, "4".
DFU
Toner supply amount
Varies
Toner end detection
Performed.
Toner Density Sensor Initial Setting
The TD sensor initial setting procedure is done by SP2801. During TD sensor initial setting,
the TD sensor is set so that the TD sensor output to the value of SP2-926 (default: 2.5V).
This value will be used as the standard reference voltage (Vts) of the TD sensor.
Toner Density Measurement
Toner density in the developer is detected once every copy cycle. The sensor output
voltage (Vt) during the detection cycle is compared with the standard reference voltage
(Vts) or the toner supply reference voltage (Vref).
Vsp/Vsg Detection
The ID sensor detects the following voltages.
Vsg: The ID sensor output when checking the drum surface
Vsp: The ID sensor output when checking the ID sensor pattern
In this way, the reflectivity of both the drum surface and the pattern on the drum are
checked. This compensates for any variations in the reflectivity of the pattern on the drum
or the reflectivity of the drum surface.
The ID sensor pattern is made on the drum by the charge roller and laser diode.
Vsp/Vsg is not detected every page or job; it is detected at the following times to decide
Vref:
When the machine is turned on or returns from the energy save mode and the hot
roller temperature is less than 30 °C. The temperature threshold can be adjusted with
SP2995 001
After the total number of prints exceeds 300 pages. If this total is exceeded during a
job, the pattern is created at the completion of the job. This total can be changed with
SP2995 002.
SP 2995 003 determines whether the job is interrupted to make the ID sensor pattern.
If it is set to 1, the job will be interrupted.
Toner Supply Reference Voltage (Vref) Determination
The toner supply reference voltage (Vref) is the threshold voltage for the toner supply
determination. Vref is determined using the following data:
Содержание Aficio MP 2550B
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Страница 33: ...INSTALLATION ...
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Страница 90: ...Platen Cover B406 D017 D018 D019 D020 1 56 SM 1 15 PLATEN COVER B406 1 Install the platen cover A x 2 ...
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Страница 121: ...PREVENTIVE MAINTENANCE ...
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Страница 131: ...REPLACEMENT AND ADJUSTMENT ...
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Страница 150: ...Laser Unit D017 D018 D019 D020 3 18 SM 3 Remove A Copy tray Hook x1 1 Remove A Toner bottle B Laser unit x2 x2 ...
Страница 201: ...TROUBLESHOOTING ...
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Страница 238: ...Self Diagnostic Mode D017 D018 D019 D020 4 36 SM Self Diagnostic Test Flow Chart ...
Страница 242: ...Skewed Image D017 D018 D019 D020 4 40 SM 4 4 SKEWED IMAGE Do the following to fix a skewed image problem ...
Страница 246: ...Image Problems D017 D018 D019 D020 4 44 SM 4 5 2 CHECKING IMAGES WITH THE TRIMMING PATTERN ...
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Страница 263: ...SERVICE TABLES ...
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Страница 304: ...SP3xxx D017 D018 D019 D020 5 40 SM 5 4 SP3XXX There are no Group 3 SP codes for this machine ...
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Страница 489: ...DETAILED SECTION DESCRIPTIONS ...
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Страница 569: ...SPECIFICATIONS ...
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Страница 635: ...BOOKLET FINISHER SR3000 B793 ...
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Страница 643: ...Covers SM 3 B793 Booklet Finisher B793 3 Remove the upper left cover C ...
Страница 657: ...Folder SM 17 B793 Booklet Finisher B793 6 Remove a connector 7 7 Remove 2 screws 8 ...
Страница 658: ...Folder B793 18 SM 8 Remove the staple tray 9 9 Remove the guide 10 2 screws ...
Страница 664: ...Folder B793 24 SM 3 Set the special tool in the long hole 4 on both units 4 Secure the special tool 5 with the knob 6 ...
Страница 665: ...Folder SM 25 B793 Booklet Finisher B793 5 Tighten the screws 7 for the stapler folder unit 6 Reassemble the machine ...
Страница 666: ...Others B793 26 SM 1 4 OTHERS 1 4 1 MAIN BOARD 1 Remove the rear cover 2 Remove the main board A x 5 ...
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Страница 708: ...Covers and Roller D331 2 SM 1 1 2 FEED ROLLER 1 Pull out the tray A 2 Release the lock lever B 3 Feed roller C ...
Страница 714: ...Electrical Components D331 8 SM 1 3 4 TRAY MAIN BOARD 1 Rear cover Covers 2 Tray main board A x 4 all s ...
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Страница 729: ...FAX OPTION TYPE 3350 D361 ...
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Страница 917: ...Fax Communication Features SM 183 D361 Fax Option Type 3350 D361 ...
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Страница 979: ...DUPLEX UNIT AD3000 D369 ...
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Страница 994: ...Electrical Component D369 8 SM 4 Duplex transport motor B x 2 ...
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Страница 1010: ...Tray D370 2 SM 2 Remove the pins A x 1 each 3 By pass tray B x 1 ...
Страница 1015: ...Feed SM 7 D370 Bypass Tray BY3000 D370 6 Separation pad D spring x 1 ...
Страница 1019: ...INTERCHANGE UNIT TYPE 3350 D371 ...
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Страница 1031: ...500 SHEET FINISHER SR3050 D372 ...
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Страница 1050: ...Motors D372 12 SM B 1st bracket x2 C 2nd bracket x2 D 3rd bracket 3 Remove the rear fence motor E x2 x1 ...
Страница 1058: ...Overview D372 20 SM No What Happens sure that the stapler is at its home position ...
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Страница 1103: ...PRINTER SCANNER OPTION D383 ...
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Страница 1136: ...Scanner Service Tables D383 6 SM Compression Notch Assignment ...
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Страница 1143: ...INTERNAL SHIFT TRAY SH3010 D385 ...
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