2-48
Service Manual
Black page
Note:
Incorrect laser exposure or incorrect charging of the photoconductor causes an all black page. Always
verify the same results from a different print cartridge assembly and developer before proceeding.
Heavy background
Poor development or poorly charged toner particles cause excessive background. This is more noticeable as the
toner cartridge nears end-of-life.
FRU
Action
Toner electrodes (not a
FRU)
Check the three rearward electrodes below the toner cartridge assembly for contamination,
damage, or a short to ground. Correct as necessary.
Check continuity between the cable (DEV, TAR, and doctor blade) connection PCN3 and on
the contact tips below the toner cartridge assembly.
• If continuity fails, then call the next level of service.
LVPS/HVPS board
Controller board
Miscellaneous cables
With the printer off, disconnect the LVPS/HVPS cable from J502 on the engine board.
Turn the printer on, and 24 V dc on pins 17 and 19 of the cable.
5 V dc on pins 1, 3-5, 11, 13, and 15.
Verify ground on pins 10, 12,14, 16, and 18.
• If any of the values are incorrect, then replace LVPS/HVPS board.
• If the grounds are incorrect, then check ground paths.
• Check continuity in the cable. If the cable is bad, then call the next level of support.
• If the values are correct and the toner electrodes are good, then replace the controller
board.
• See the
“LVPS/HVPS service check” on page 2-39
and the
“Engine board service
check” on page 2-36
, if necessary.
FRU
Action
Toner cartridge (not a
FRU)
PC Kit (not a FRU)
Check the toner darkness setting in the driver. Try a lower setting.
Make sure the toner cartridge and PC Kit are correctly installed and the high voltage
contacts are clean.
If the toner cartridge and PC Kit are installed correctly, then try a new PC Kit first and then
toner cartridge.
LVPS/HVPS
Engine board
Check the contacts for correct installation and contamination where contact is made
between the print cartridge assembly and spring contacts which connect to the LVPS/HVPS
board at CN203. Clean as necessary.
If this does not correct the problem, then replace the following FRUs one at a time in the
order shown:
• LVPS/HVPS board (See
“Black page” on page 2-48
for pin values.)
• Engine board
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Страница 1: ... 02 Nov 2009 ...
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Страница 10: ...x Service Manual ...
Страница 15: ...Notices and safety information xv ...
Страница 16: ...xvi Service Manual ...
Страница 28: ...1 8 Service Manual ...
Страница 31: ...General information 1 11 Reduce Enlarge 25 to 400 Copy only ...
Страница 151: ...Diagnostic aids 3 47 3 Remove the jam 4 Close the rear door 5 Close the front door 6 Touch Continue ...
Страница 157: ...Diagnostic aids 3 53 4 Remove the ADF separator roll 5 Remove the jammed media 6 Reinstall the ADF separator roll ...
Страница 160: ...3 56 Service Manual ...
Страница 172: ...4 12 2 Remove the three screws B securing the top of the controller shield B ...
Страница 180: ...4 20 5 Lift the duplex slightly push to the left and tilt to clear the right side of the printer 6 Remove the duplex ...
Страница 182: ...4 22 6 Remove the screw D from the gear E 7 Remove the plastic bushing F ...
Страница 183: ...Repair information 4 23 8 Use a screwdriver to pop the retainer clip G loose from the gear 9 Remove the gear H ...
Страница 186: ...4 26 6 Disconnect the MPF from the lower front cover 7 Disconnect the fuser link A from the front access door A ...
Страница 192: ...4 32 2 Carefully pull the scanner front cover away from the tub assembly ...
Страница 205: ...Repair information 4 45 5 Remove the three screws B from the left door mount B ...
Страница 208: ...4 48 8 Use a screwdriver to pop the inner shaft lock B loose 9 Remove the inner shaft lock C ...
Страница 211: ...Repair information 4 51 5 Remove the e clip B 6 Remove the media feed clutch with cable C ...
Страница 217: ...Repair information 4 57 7 Open the front access door and remove the lower paper guide B ...
Страница 219: ...Repair information 4 59 5 Remove the three screws B from the left side of the printer B ...
Страница 250: ...4 90 12 Disconnect LSU HSYNC extension cable at the connector in the middle of the cable ...
Страница 251: ...Repair information 4 91 13 Remove the three screws A from the left rear frame assembly A A A ...
Страница 252: ...4 92 14 Remove the three screws B from the right rear frame assembly B B B ...
Страница 272: ...4 112 6 Insert the fax card interface cable into the system board connector 7 Lower and lock the scanner assembly ...
Страница 282: ...6 2 Service Manual ...
Страница 284: ...7 2 Service Manual Assembly 1 Covers 3 11 7 13 5 16 9 15 2 10 6 17 4 12 8 14 1 17 18 ...
Страница 286: ...7 4 Service Manual Assembly 2 Imaging 3 11 7 13 5 16 9 15 2 10 6 4 12 8 14 1 ...
Страница 288: ...7 6 Service Manual Assembly 3 Tray assemblies 3 2 1 5 4 ...
Страница 290: ...7 8 Service Manual Assembly 4 Electronics 11 12 7 13 6 14 8 1 2 3 4 5 9 10 17 20 18 19 22 21 16 15 ...
Страница 292: ...7 10 Service Manual Assembly 5 Frame 7 1 2 5 6 7 12 8 See instruction sheet in the FRU 9 10 11 3 4 3 ...
Страница 296: ...7 14 Service Manual ...
Страница 304: ...I 8 Service Manual ...