05/2014
2-131
DC SC2020
Troubleshooting
2.2.4 Common FIP
Version 1.1
Replacement parts list
Procedure
NOTE: To prevent light-induced fatigue, cover the Drum with a black sheet when removing the Drum. In
addition, do not touch the Drum surface.
Perform Procon Print of CE Mode and check from 755-003 to 755-006, 752-078 to 752-081, 755-023 to
755-026. Are the results all 0?
YN
Perform Procon Print of CE Mode and check from 755-003 to 755-006, 752-078 to 752-081, 755-
023 to 755-026. Run Test Pattern>Prccon ON Print. Check the number of Fail occurrences by using
NVM Read/Write again. Did the number of Fail occurrences increase for either color?
YN
No need to take measures if Fail does not occur after running Procon ON Print a few times.
Check to see if the density of the whole image that was printout from ProCon ON Print is light or the
Front side of FS direction (ADC Patch position) of full surface half-tone of the corresponding color of
Service Mode Test Pattern Print. Is White extremely light?
YN
There is a possibility that only ADC Patch is light. Check to see if there is no uncleanness,
adhering substance, scratch on the Front side (ADC Parch position) of IBT Belt and 1st BTR.
Is IBT Belt, 1st BTR normal?
YN
There is a possibility of ADC Sensor abnormality. Turn OFF the power and check the fol-
lowing connections for open circuits, short circuits, and poor contacts.
• Between MOB ADC Sensor (R-RAD) J112 and DRIVE PWB J414
• Between MOB ADC Sensor (R-RAD LOW) J113 and DRIVE PWB J414
Is the conduction normal?
YN
Check MOB ADC Sensor Assembly installation and if there is no uncleanness and
no foreign substance contamination to the detecting element, replace the MOB ADC
Sensor Assembly. (PL 6.1)
• Connect the connector.
• Replace broken wire, parts that went short (such as PWB).
Replace the following parts.
• Replace the IBT Belt. (PL 6.3)
NOTE: Perform Auto Registration from UI-Diag if IBT Belt is replaced.
• IBT Belt Cleaner (PL 6.2)
•1st BTR Roll (PL 6.3)
• Perform processing of troubleshooting that corresponds to the image quality trouble that
should be handled first.
• Replace if there is no Toner in the Toner Cartridge of the corresponding color. (PL 5.1)
• Replace if there is any uncleanness, adhering substance, scratch on the Front side of Drum FS
direction of Drum Cartridge of the corresponding color. (PL 8.1)
• Replace if there is any uncleanness, adhering substance, scratch on the Front side of Drum FS
direction of BCR of the corresponding color. (PL 8.3)
• Replace if the Toner close to the Front of SF direction on Deve Roll of the corresponding color,
or if the Toner seems low after turning the Gear clockwise. (PL 5.1)
• If the Dispense is not driven after running Digital Output [093-001] (Toner Dispense Motor Y)/
[093-002] (Toner Dispense Motor M) / [093-003] (Toner Dispense Motor C) / [093-004] (Toner
Dispense Motor K), replace the Toner Dispense Motor. (PL 5.3)
• Turn the Power OFF, check the corresponding color LPH, and clean or replace the LPS if it is
dirty. (PL 2.1)
• Turn the Power OFF, check for break of wire, short, half-connection between each HVPS and
each parts. If there is any conduction failure, replace the connector connection, parts that was
broken or short.
View the corresponding FIP and repair. Replace the parts of "Replacement Parts List" if the cause cannot
be specified and restoration process cannot be completed.
Table 1 Table 1
No. Component
Possibilit
y Reason
1 MOB ADC Sensor Assembly H Unable to detect Patch due to abnormality in ADC
Sensor.
2 IBT Belt L Patch is light due to deterioration and contamina-
tion of the IBT Belt.
3 IBT Cleaner L Patch is light due to contamination of the IBT Belt.
4 Toner Cartridge L Patch is light due to shortage in the Toner.
5 Drum Cartridge L Patch is light due to contamination of BCR and
deterioration of the Drum.(When the exchange dis-
play comes out in UI, exchange.)
6 LPH Unit L Patch is light due to contamination of LPH and poor
light intensity.
7 1st BTR Unit L The image is light due to 1st BTR Retract malfunc-
tion or the Patch is light due to contamination of 1st
BTR Roll.
8 Deve Housing Assembly L Patch is light due to eccentric rotation and MOS
malfunction.(When the exchange display comes
out in UI, exchange.)
9 HVPS (BCR) L Patch is light due to application malfunction.
10 HVPS (Deve) L Patch is light due to application malfunction.
11 HVPS (1st/2nd BTR) L Patch is light due to application malfunction.
12 IBT Cleaner Unit L Patch is light due to tearing of the blade.
13 Dispense Unit L Patch is light due to Toner supply malfunction.
14 LPH FFC L Patch is light due to LPH signal malfunction.
15 DRIVE PWB L Patch is light due to MCU abnormality.
A
A
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