{"id":29519,"date":"2018-05-29T14:09:16","date_gmt":"2018-05-29T21:09:16","guid":{"rendered":"http:\/\/www.enxmag.com\/twii\/?p=29519"},"modified":"2018-05-30T11:49:08","modified_gmt":"2018-05-30T18:49:08","slug":"a-deeper-dive-into-xerox-workcentre-7120-series-wc-7120-7125-7220-7225","status":"publish","type":"post","link":"https:\/\/www.enxmag.com\/twii\/tech-tip\/2018\/05\/a-deeper-dive-into-xerox-workcentre-7120-series-wc-7120-7125-7220-7225\/","title":{"rendered":"A Deeper Dive into Xerox WorkCentre 7120 Series WC 7120, 7125, 7220, 7225"},"content":{"rendered":"

In prior articles, we\u2019ve covered the drum cartridges and fusers for this series of full-color MFP copiers. Now let\u2019s see what makes these machines tick\u2014we\u2019ll cover the Fault Code meanings and take a first stab at how to get around in diagnostic mode.<\/strong><\/p>\n

As a refresher, these machines are designed for office use with a duty cycle of around 50K impressions per month. They\u2019re price at around $7,000 new, which is roughly half the cost of a WC-7855. Although they\u2019re not as heavy of a machine, they\u2019re capable of producing fine-looking full-color copies and prints, and are substantial machines in their own right.<\/p>\n

This series has a duty cycle of around 50,000 impressions per month, with toner cartridges expected to run about $15,000 (for c\/m\/y) and $22,000 (for black) assuming 5% coverage. One thing to note is that there is more than one region or \u201cplan.\u201d If you install the wrong version, the machine will reject it because the Customer Replaceable Unit Monitor (CRUM) chip is wrong. There are 4 drum cartridges (R1-R4) which are color specific, as each includes the developer station underneath it. These have a stated yield of around 50-60,000 each (part numbers: 013R00657(K), 013R00658(Y), 013R00659(M), 013R00660(C)). Replacement parts for the drum cartridges and drum count reset CRUM chips are available to repair, rebuild or otherwise extend the yield on these cartridges.<\/p>\n

The 2nd BTR (Transfer Roll Assembly) on the left door is R5, good for just under 200,000. There\u2019s also a Transfer Belt Unit (R6) which is fairly easy to replace; it\u2019s considered to be customer replaceable, and has a stated yield of 200,000. Finally, there\u2019s the Toner Waste Container (R7), which comes with a new wand (stored in the front door) for cleaning the ROS windows (the laser-slit glasses). To clean the ROS windows, remove the Waste Container first, and behind there you\u2019ll see the slots where you can slide the wand in and out. Push the wand in slowly until it stops, then retract it slowly for best results.<\/p>\n

Next, let\u2019s have a look at some of the fault codes. This list is by no means complete, but should send you in the right direction for most of the common faults. In the list below, some of the hints tell you to \u201cpower off completely,\u201d which means turning off the outer power switch first (that one on top of where the front door opens on the right). After the machine is fully powered down, you then need to open the front door to turn off the Inner Main Power Switch on the inside of it.<\/p>\n

For reference, here are some acronyms used repeatedly in the fault list:<\/p>\n

ATC<\/strong> = Automatic Toner Concentration
\nADC<\/strong> = Automatic Density Correction
\nCRUM<\/strong> = Customer Replaceable Unit Monitory (drum or toner chip)
\nESS<\/strong> = Electronic Switching System (the print controller board on the machine)
\nMCU<\/strong> = Main Control Unit (main board)
\nNVM<\/strong> = Non-Volatile Memory (machine settings)
\nROS<\/strong> = Raster Output Scanner (laser unit)<\/p>\n

Note<\/strong>: a handful of fault codes require you to reset NVM settings back to zero before the machine will run again. See the asterisks at the bottom of the table for more info about resetting the fault codes which require the extra step.<\/p>\n

FAULT CODE LIST<\/strong><\/p>\n

For 7220\/7225<\/strong>, the fault codes will all start with \u201c3\u201d instead of \u201c0.\u201d(e.g. 310-319 = 010-319)<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Fault Code<\/th>\nFault Meaning<\/th>\n<\/tr>\n<\/thead>\n
002-500<\/td>\nController-to-user interface (UI) communication problem<\/td>\n<\/tr>\n
003-xxx faults<\/td>\nController (ESS) problems<\/td>\n<\/tr>\n
005-xxx faults<\/td>\nDocument feeder (DADF) problems<\/td>\n<\/tr>\n
010-xxx faults<\/td>\nFuser problems<\/td>\n<\/tr>\n
010-319*<\/td>\nFuser heat control failure (*must reset from NVM Read\/Write, see below)<\/td>\n<\/tr>\n
010-320\/333\/*<\/td>\nFuser overheat (*must reset from NVM Read\/Write, see below)<\/td>\n<\/tr>\n
010-328<\/td>\nFuser did not warm up in time (this can happen if the room is cold; power off completely<\/td>\n<\/tr>\n
010-329<\/td>\nFuser reset fuse failed to blow (hen a new fuser is installed, the machine sees it and attempts to blow the fuse)<\/td>\n<\/tr>\n
010-330<\/td>\nFuser motor stopped turning (if something is seized up in the fuser or the drives to the fuser, the machine sees that the motor can\u2019t turn)<\/td>\n<\/tr>\n
010-337*<\/td>\nFuser heat roll paper wrap detected (*must reset from NVM Read\/Write,see below)<\/td>\n<\/tr>\n
010-420<\/td>\nFuser near-end-of-life warning<\/td>\n<\/tr>\n
010-421**<\/td>\nFuser end of life (**HFSI counter reset recommended)<\/td>\n<\/tr>\n
012-xxx<\/td>\nFinisher faults (too many to list here)<\/td>\n<\/tr>\n
013-xxx<\/td>\nFinisher faults (too many to list here)<\/td>\n<\/tr>\n
016-xxx<\/td>\nController problems<\/td>\n<\/tr>\n
018-xxx<\/td>\nNetwork problems<\/td>\n<\/tr>\n
021-xxx<\/td>\nForeign device interface (FDI) problems<\/td>\n<\/tr>\n
024-xxx<\/td>\nController problems<\/td>\n<\/tr>\n
025-xxx<\/td>\nHard-drive problems<\/td>\n<\/tr>\n
026-xxx<\/td>\nScan\/controller problems<\/td>\n<\/tr>\n
027-xxx<\/td>\nNetwork problems<\/td>\n<\/tr>\n
033-xxx,
\n034-xxx 035-xxx,
\n036-xxx<\/td>\n		Fax problems<\/td>\n<\/tr>\n
041-xxx<\/td>\nMain Control Unit (MCU) problems<\/td>\n<\/tr>\n
042-313<\/td>\nLV rear intake fan failure (127K61770)<\/td>\n<\/tr>\n
042-323<\/td>\nDrum motor failure (check for a bound-up drum cartridge or IBT transfer-belt assembly, which can stall the motor)<\/td>\n<\/tr>\n
042-325<\/td>\nMain motor failure (this motor drives the black developer unit and the paper transport; look for anything which might be binding up)<\/td>\n<\/tr>\n
042-330<\/td>\nFuser exhaust fan failure<\/td>\n<\/tr>\n
042-337<\/td>\nNOHAD logic failure (ESS to MCU communication problem). Try first to power off completely. If that doesn\u2019t solve the problem, the service manual says to reload the machine software.<\/td>\n<\/tr>\n
042-345<\/td>\nDrum coupling contact failure. Check to see if one of the drum drive couplings in the back of the machine is \u201cstuck\u201d behind the frame; all 4 should be out a bit and spring loaded to mate with the couplings on the rear of the drum cartridges.<\/td>\n<\/tr>\n
042-346<\/td>\nDrive logic failure (ESS to MCU communication problem). Try first to power off completely. If that doesn\u2019t solve the problem, the service manual says to reload the machine software.<\/td>\n<\/tr>\n
045-322<\/td>\nImage processing errors<\/td>\n<\/tr>\n
061-xxx<\/td>\nROS (laser unit) problems<\/td>\n<\/tr>\n
062-xxx<\/td>\nGenerally IIT (scanner) problems<\/td>\n<\/tr>\n
062-277<\/td>\nESS to DADF (document feeder) communication failure<\/td>\n<\/tr>\n
062-300<\/td>\nPlaten interlock switch open; check the DADF hinge for breakage<\/td>\n<\/tr>\n
071-105 = T1 072-105 = T2 073-105 = T3 074-105 = T4<\/td>\nTray 1, 2, 3 or 4 paper jam (paper from tray 1, 2, 3 or 4 failed to reach registration sensor)<\/td>\n<\/tr>\n
071\/072\/073\/ 074-210<\/td>\nTray 1, 2, 3 or 4 lift failure<\/td>\n<\/tr>\n
071\/072\/073\/ 074-212<\/td>\nTray 1, 2, 3 or 4 paper-size sensing problem<\/td>\n<\/tr>\n
072\/073\/
\n074-101<\/td>\n		Tray 2, 3, or 4 misfeed<\/td>\n<\/tr>\n
072\/073\/
\n074-900<\/td>\n		Tray 2, 3 or 4 feed out sensor static jam (paper remaining on feed sensor)<\/td>\n<\/tr>\n
075-135<\/td>\nTray 5 (bypass\/MSI) paper jam (failed to reach registration sensor)<\/td>\n<\/tr>\n
077-101<\/td>\nRegistration jam (paper never left the registration sensor)<\/td>\n<\/tr>\n
077-103 or 106<\/td>\nExit sensor 1 jam (paper never left sensor OR never reached sensor)<\/td>\n<\/tr>\n
077-105 or 109<\/td>\nExit sensor 2 jam (paper never left sensor OR never reached sensor)<\/td>\n<\/tr>\n
077-110<\/td>\nPOB (paper on belt) sensor sensed paper on the transfer belt<\/td>\n<\/tr>\n
077-123\/130<\/td>\nRegistration sensor (duplexed page did not reach registration sensor)<\/td>\n<\/tr>\n
077-131<\/td>\nDuplex jam (paper never reached the duplex wait sensor)<\/td>\n<\/tr>\n
077-211<\/td>\nTray 3\/4 module mismatch (two-tray module vs. tandem tray module)<\/td>\n<\/tr>\n
077-212 or 214<\/td>\nTray 3\/4 module reset fail OR logic fail<\/td>\n<\/tr>\n
077-215<\/td>\nTray module communication failure<\/td>\n<\/tr>\n
077-300<\/td>\nFront cover interlock open<\/td>\n<\/tr>\n
077-301<\/td>\nLeft cover interlock open (main left cover)<\/td>\n<\/tr>\n
077-305<\/td>\nTray module left cover interlock open<\/td>\n<\/tr>\n
077-307<\/td>\nDuplex cover interlock open<\/td>\n<\/tr>\n
077-308\/077-309<\/td>\nLeft-upper cover open\/ left-lower cover open<\/td>\n<\/tr>\n
077-314<\/td>\nPaper handler module logic failure<\/td>\n<\/tr>\n
077-900<\/td>\nPaper detected on registration sensor after jam clearance<\/td>\n<\/tr>\n
077-901\/902<\/td>\nExit sensor 1\/ 2 static jam (paper detected on sensor after jam clearance)<\/td>\n<\/tr>\n
077-903<\/td>\nPOB (paper-on-belt) sensor jam (paper detected after jam clearance)<\/td>\n<\/tr>\n
077-907<\/td>\nDuplex wait jam (paper detected on sensor after jam clearance)<\/td>\n<\/tr>\n
089-xxx<\/td>\nColor registration control failures<\/td>\n<\/tr>\n
091-313<\/td>\nCRUM chip ASIC communication failure<\/td>\n<\/tr>\n
091-400\/911<\/td>\nToner waste bottle nearly full\/ waste bottle full<\/td>\n<\/tr>\n
091-401\/402<\/td>\nBlack drum cartridge, near end of life \/ end of life<\/td>\n<\/tr>\n
091-407<\/td>\nBlack drum CRUM chip problem<\/td>\n<\/tr>\n
091-411 or 417<\/td>\nYellow drum cartridge, near end of life OR drum CRUM chip problem<\/td>\n<\/tr>\n
091-421 or 427<\/td>\nMagenta drum cartridge, near end of life OR drum CRUM chip problem<\/td>\n<\/tr>\n
091-431 or 437<\/td>\nCyan drum cartridge, near end of life OR drum CRUM chip problem<\/td>\n<\/tr>\n
091-480\/481\/482<\/td>\nYellow\/Magenta\/Cyan drum cartridge, end of Life<\/td>\n<\/tr>\n
091-910<\/td>\nWaste toner bottle not in correct position (or not installed)<\/td>\n<\/tr>\n
091-913<\/td>\nBlack drum cartridge, end of life<\/td>\n<\/tr>\n
091-914\/
\n915\/916<\/td>\n		Black drum CRUM failure\/broken data\/wrong CRUM version<\/td>\n<\/tr>\n
091-917\/
\n918\/919<\/td>\n		Yellow\/Magenta\/Cyan drum CRUM chip \u2013 communication failure<\/td>\n<\/tr>\n
091-921\/927\/
\n928\/929<\/td>\n		Black\/Yellow\/Magenta\/Cyan drum CRUM, out of position or missing<\/td>\n<\/tr>\n
091-936\/937\/
\n938\/939<\/td>\n		Yellow\/Magenta\/Cyan drum CRUM, wrong CRUM version (data mismatch)<\/td>\n<\/tr>\n
091-940\/941\/
\n942\/943<\/td>\n		Yellow\/Magenta\/Cyan drum CRUM chip, broken data failure<\/td>\n<\/tr>\n
092-312*<\/td>\nYellow ATC sensor failure (auto toner concentration); toner dispense problem for yellow, requires reset from diagnostics*<\/td>\n<\/tr>\n
092-313*<\/td>\nMagenta ATC sensor failure (automatic toner concentration); toner dispense problem for magenta, requires reset from diagnostics*<\/td>\n<\/tr>\n
092-314*<\/td>\nCyan ATC sensor failure (automatic toner concentration); toner dispense problem for cyan, requires reset from diagnostics*<\/td>\n<\/tr>\n
092-315*<\/td>\nBlack ATC sensor failure (automatic toner concentration; toner dispense problem for black, requires reset from diagnostics*<\/td>\n<\/tr>\n
092-649<\/td>\nADC shutter open failure (automatic density concentration)<\/td>\n<\/tr>\n
092-650<\/td>\nADC shutter close failure<\/td>\n<\/tr>\n
092-661<\/td>\nTemperature sensor failure (internal machine temperature too high)<\/td>\n<\/tr>\n
092-662<\/td>\nHumidity temperature sensor failure<\/td>\n<\/tr>\n
093-314\/315\/
\n316\/317<\/td>\n		Yellow\/Magenta\/Cyan\/Black toner dispense motor problems<\/td>\n<\/tr>\n
093-320<\/td>\nDeveloper drive motor failure (Y\/M\/C)<\/td>\n<\/tr>\n
093-426\/427\/
\n428\/429<\/td>\n		Black\/Yellow\/Magenta\/Cyan toner ctg. CRUM chip error<\/td>\n<\/tr>\n
093-912<\/td>\nBlack toner cartridge empty<\/td>\n<\/tr>\n
093-916<\/td>\nBlack Toner CRUM chip – out of position \/ communication failure \/ data broken failure \/ wrong CRUM version (data mismatch)<\/td>\n<\/tr>\n
093-941\/
\n942\/943<\/td>\n		Magenta\/Cyan\/Yellow toner CRUM chip communication failure<\/td>\n<\/tr>\n
093-948<\/td>\nYellow developer install time failure (drum ctg. failed to initialize developer)<\/td>\n<\/tr>\n
093-950\/
\n951\/952<\/td>\n		Yellow\/Magenta\/Cyan toner CRUM chip data broken failure<\/td>\n<\/tr>\n
093-953\/954\/
\n955\/956<\/td>\n		Yellow\/Magenta\/Cyan\/Black developer install fail (pull seal from yellow drum ctg.)<\/td>\n<\/tr>\n
093-957\/
\n958\/959<\/td>\n		Magenta\/Cyan\/Black developer install time failure (pull seal from magenta drum ctg.)<\/td>\n<\/tr>\n
093-960\/
\n961\/962<\/td>\n		Yellow\/Magenta\/Cyan toner cartridge CRUM chip, wrong CRUM chip (data mismatch)<\/td>\n<\/tr>\n
093-970\/
\n971\/972<\/td>\n		Yellow\/Magenta\/Cyan toner CRUM chip out of position or missing<\/td>\n<\/tr>\n
094-417<\/td>\nIBT belt (transfer belt) unit is nearing end of life<\/td>\n<\/tr>\n
094-419<\/td>\n2nd BTR (transfer roll) is nearing end of life<\/td>\n<\/tr>\n
094-420**<\/td>\nIBT Belt (transfer belt) unit, end of life (**HFSI reset required)<\/td>\n<\/tr>\n
094-422**<\/td>\n2nd BTR (transfer roll) unit, end of life (**HFSI reset required)<\/td>\n<\/tr>\n
094-910<\/td>\nIBT belt unit, OR 2nd BTR unit out of position or not installed<\/td>\n<\/tr>\n
102-xxx<\/td>\nGenerally UI (user interface\/control panel) problems<\/td>\n<\/tr>\n
116-xxx<\/td>\nGenerally controller problems<\/td>\n<\/tr>\n
117-xxx<\/td>\nGenerally controller problems (UI\/EWS)<\/td>\n<\/tr>\n
118-310<\/td>\nIPSEC failed to initialize<\/td>\n<\/tr>\n
121-xxx<\/td>\nGenerally FDI (foreign device interface) problems<\/td>\n<\/tr>\n
123-xxx<\/td>\nGenerally UI (user interface\/control panel) problems<\/td>\n<\/tr>\n
124-xxx<\/td>\nGenerally billing & serial number errors<\/td>\n<\/tr>\n
125-311<\/td>\nController problem with PSW cont. software (UI\/EWS)<\/td>\n<\/tr>\n
127-xxx<\/td>\nGenerally external communications<\/td>\n<\/tr>\n
133-xxx &
\n134-xxx<\/td>\n		Fax problems<\/td>\n<\/tr>\n
202-xxx<\/td>\nTimer failures<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

*Faults requiring reset from NVM Read\/Write<\/strong><\/p>\n

Some codes require setting a particular NVM code back to \u201c0\u201d to clear the fault. Enter diagnostic mode and choose \u201cNVM Read\/Write\u201d reset the value of the specified code back to \u201c0\u201d (read more below).
\n*010-319\/010-320\/010-333\/010-337 fuser faults\u2014reset NVM code 744-248 back to \u201c0\u201d
\n*092-312 Yellow toner dispense fault\u2014reset NVM codes 752-365 & 752-369 back to \u201c0\u201d
\n*092-313 Magenta toner dispense fault\u2014reset NVM codes 752-366 & 752-370 back to \u201c0\u201d
\n*092-314 Cyan toner dispense fault\u2014reset NVM codes 752-367 & 752-371 back to \u201c0\u201d
\n*092-315 Black toner dispense fault\u2014reset NVM code 752-368 & 752-372 back to \u201c0\u201d<\/p>\n

**Faults requiring reset from dC135 HFSI (high-frequency service items)<\/strong><\/p>\n

1. Entering Diagnostics Mode
\nHold down \u201c0\u201d for at least 5 seconds
\n2. While holding \u201c0,\u201d press \u201cStart\u201d
\nA passcode screen shows up, enter \u201c6789\u201d and touch \u201cConfirm\u201d
\nPress \u201cMachine Status\u201d and choose the \u201cTools\u201d tab
\n3. Choose \u201cSystem Settings,\u201d
\n4. In the center \u201dgroup\u201d column, choose \u201cCommon Service Settings\u201d
\n5. In the right column (features), scroll down to \u201cMaintenance\/Diagnostics\u201d and choose \u201cNVM Read\/Write\u201d<\/p>\n

*NVM Read \/ Write (Memory Settings)<\/strong><\/p>\n

To reset some fault codes:
\nEnter diagnostics mode and touch \u201cNVM Read\/Write\u201d
\nEnter the NVM code (chain-link code) and touch \u201cConfirm\/Change\u201d (t will show you the \u201cCurrent Value\u201d)
\nEnter a \u201c0\u201d in the \u201cNew Value\u201d column and touch \u201cSave\u201d
\nSelect \u201cClose\u201d and finally \u201cExit\u201d diagnostics
\nThe machine will need to reboot for the NVM changes to take place and for the machine to attempt to come to ready again, now that the fault code has been cleared.<\/p>\n

**HFSI Counter Resets<\/strong><\/p>\n

The CRUs should automatically reset when the customer installs the assembly, but the product manual also presents a way to access HFSI counters from diagnostic mode. This may be helpful if a new module fails to reset properly. After you enter Diagnostics Mode (read above):<\/p>\n

    \n
  • For the 7220\/7225<\/strong>: press \u201cService Info\u201d or the \u201cMaintenance\u201d tab and choose \u201cDc135 CRU\/HFSI Counters.\u201d Scroll through the list, choose the HFSI item and touch \u201cReset Counter.\u201d<\/li>\n
  • For the 7120\/7125<\/strong>: enter diagnostics mode, choose \u201cAdjustment\/Others,\u201d then select \u201cHFSI Counter.\u201d Select the HFSI from the list and press \u201cDetails,\u201d followed by \u201cReset Current Value.\u201d<\/li>\n<\/ul>\n

    Special Boot Modes<\/strong><\/p>\n

    This is helpful for clearing jobs when they get stuck in the queue. Hold down the buttons specified below while turning on the power, and keep holding them until the boot screen (progress bar) appears.<\/p>\n

    Job Log Initialize<\/strong>: hold down \u201c1,\u201d \u201cStop,\u201d and \u201cEnergy Saver\u201d buttons while powering on.<\/p>\n

    Spool Log Initialize<\/strong>: hold down \u201c6\u201d, \u201cStop,\u201d and \u201cEnergy Saver\u201d buttons while powering on.<\/p>\n

    HDD (hard drive) Initialize<\/strong>: Hold down \u201c4,\u201d \u201cStop,\u201d and \u201cEnergy Saver\u201d buttons while powering on (WARNING: all customer data will be deleted if you do this. Make sure to create backups of all data set before you initialize the HDD)<\/p>\n

    Now that we\u2019ve scratched the surface on this series of machines, hopefully they will be more approachable for everyone. Happy repairs.<\/p>\n","protected":false},"excerpt":{"rendered":"

    In prior articles, we\u2019ve covered the drum cartridges and fusers for this series of full-color MFP copiers. Now let\u2019s see what makes these machines tick\u2014we\u2019ll cover the Fault Code meanings and take a first stab at how to get around in diagnostic mode. As a refresher, these machines are designed for office use with a duty cycle of around 50K impressions per month. They\u2019re price at around $7,000 new, which is roughly half the cost of a WC-7855. Although they\u2019re not as heavy of a machine, they\u2019re capable of producing fine-looking full-color copies and prints, and are substantial machines in their own right. This series has a duty cycle of around 50,000 impressions per month, with toner cartridges expected to run about $15,000 (for c\/m\/y) and $22,000 (for black) assuming 5% coverage. One thing to note is that there is more than one region or \u201cplan.\u201d If you install the wrong version, the machine will reject it because the Customer Replaceable Unit Monitor (CRUM) chip is wrong. There are 4 drum cartridges (R1-R4) which are color specific, as each includes the developer station underneath it. These have a stated yield of around 50-60,000 each (part numbers: 013R00657(K), 013R00658(Y), 013R00659(M), 013R00660(C)). Replacement parts for the drum cartridges and drum count reset CRUM chips are available to repair, rebuild or otherwise extend the yield on these cartridges. The 2nd BTR (Transfer Roll Assembly) on the left door is R5, good for just under 200,000. There\u2019s also a Transfer Belt Unit (R6) which is fairly easy to replace; it\u2019s considered to be customer replaceable, and has a stated yield of 200,000. Finally, there\u2019s the Toner Waste Container (R7), which comes with a new wand (stored in the front door) for cleaning the ROS windows (the laser-slit glasses). To clean the ROS windows, remove the Waste Container first, and behind there you\u2019ll see the slots where you can slide the wand in and out. Push the wand in slowly until it stops, then retract it slowly for best results. Next, let\u2019s have a look at some of the fault codes. This list is by no means complete, but should send you in the right direction for most of the common faults. In the list below, some of the hints tell you to \u201cpower off completely,\u201d which means turning off the outer power switch first (that one on top of where the front door opens on the right). After the machine is fully powered down, you then need to open the front door to turn off the Inner Main Power Switch on the inside of it. For reference, here are some acronyms used repeatedly in the fault list: ATC = Automatic Toner Concentration ADC = Automatic Density Correction CRUM = Customer Replaceable Unit Monitory (drum or toner chip) ESS = Electronic Switching System (the print controller board on the machine) MCU = Main Control Unit (main board) NVM = Non-Volatile Memory (machine settings) ROS = Raster Output Scanner (laser unit) Note: a handful of fault codes require you to reset NVM settings back to zero before the machine will run again. See the asterisks at the bottom of the table for more info about resetting the fault codes which require the extra step. FAULT CODE LIST For 7220\/7225, the fault codes will all start with \u201c3\u201d instead of \u201c0.\u201d(e.g. 310-319 = 010-319) Fault Code Fault Meaning 002-500 Controller-to-user interface (UI) communication problem 003-xxx faults Controller (ESS) problems 005-xxx faults Document feeder (DADF) problems 010-xxx faults Fuser problems 010-319* Fuser heat control failure (*must reset from NVM Read\/Write, see below) 010-320\/333\/* Fuser overheat (*must reset from NVM Read\/Write, see below) 010-328 Fuser did not warm up in time (this can happen if the room is cold; power off completely 010-329 Fuser reset fuse failed to blow (hen a new fuser is installed, the machine sees it and attempts to blow the fuse) 010-330 Fuser motor stopped turning (if something is seized up in the fuser or the drives to the fuser, the machine sees that the motor can\u2019t turn) 010-337* Fuser heat roll paper wrap detected (*must reset from NVM Read\/Write,see below) 010-420 Fuser near-end-of-life warning 010-421** Fuser end of life (**HFSI counter reset recommended) 012-xxx Finisher faults (too many to list here) 013-xxx Finisher faults (too many to list here) 016-xxx Controller problems 018-xxx Network problems 021-xxx Foreign device interface (FDI) problems 024-xxx Controller problems 025-xxx Hard-drive problems 026-xxx Scan\/controller problems 027-xxx Network problems 033-xxx, 034-xxx 035-xxx, 036-xxx Fax problems 041-xxx Main Control Unit (MCU) problems 042-313 LV rear intake fan failure (127K61770) 042-323 Drum motor failure (check for a bound-up drum cartridge or IBT transfer-belt assembly, which can stall the motor) 042-325 Main motor failure (this motor drives the black developer unit and the paper transport; look for anything which might be binding up) 042-330 Fuser exhaust fan failure 042-337 NOHAD logic failure (ESS to MCU communication problem). Try first to power off completely. If that doesn\u2019t solve the problem, the service manual says to reload the machine software. 042-345 Drum coupling contact failure. Check to see if one of the drum drive couplings in the back of the machine is \u201cstuck\u201d behind the frame; all 4 should be out a bit and spring loaded to mate with the couplings on the rear of the drum cartridges. 042-346 Drive logic failure (ESS to MCU communication problem). Try first to power off completely. If that doesn\u2019t solve the problem, the service manual says to reload the machine software. 045-322 Image processing errors 061-xxx ROS (laser unit) problems 062-xxx Generally IIT (scanner) problems 062-277 ESS to DADF (document feeder) communication failure 062-300 Platen interlock switch open; check the DADF hinge for breakage 071-105 = T1 072-105 = T2 073-105 = T3 074-105 = T4 Tray 1, 2, 3 or 4 paper jam (paper from tray 1, 2, 3 or 4 failed to reach registration sensor) 071\/072\/073\/ 074-210 Tray 1, 2, 3 or 4 lift failure 071\/072\/073\/ 074-212 Tray 1, 2, 3 or 4 paper-size sensing problem […]<\/p>\n","protected":false},"author":64,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1648],"tags":[],"_links":{"self":[{"href":"https:\/\/www.enxmag.com\/twii\/wp-json\/wp\/v2\/posts\/29519"}],"collection":[{"href":"https:\/\/www.enxmag.com\/twii\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.enxmag.com\/twii\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.enxmag.com\/twii\/wp-json\/wp\/v2\/users\/64"}],"replies":[{"embeddable":true,"href":"https:\/\/www.enxmag.com\/twii\/wp-json\/wp\/v2\/comments?post=29519"}],"version-history":[{"count":7,"href":"https:\/\/www.enxmag.com\/twii\/wp-json\/wp\/v2\/posts\/29519\/revisions"}],"predecessor-version":[{"id":29526,"href":"https:\/\/www.enxmag.com\/twii\/wp-json\/wp\/v2\/posts\/29519\/revisions\/29526"}],"wp:attachment":[{"href":"https:\/\/www.enxmag.com\/twii\/wp-json\/wp\/v2\/media?parent=29519"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.enxmag.com\/twii\/wp-json\/wp\/v2\/categories?post=29519"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.enxmag.com\/twii\/wp-json\/wp\/v2\/tags?post=29519"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}