Introduction.... Measurements.... 2-3 2-3 2-5 2-11 2-12 2-13 2-14 2-15 2-16 2-16 2-17 2-18 2-18 2-19 2-20 2-21 2-21 2-22 2-22 2-23 2-23 2-24 2-24 2-25 2-25 2-26 2-27 2-28 2-29 2-29 2-30 2-31 2-32 2-33 2-34 2-34 2-35 2-36 2-37 2-38 2-39 2-40 2-41 2-41

Error Code Table

Error Code Table....

Base Printer

RAP 1 AC Power.... RAP 2 DC Power... RAP 3 DC Power Loading.... RAP 4 C3: Tray Error / Insert Tray 1,2,3... RAP 5 C5: Add Paper To MBF, Tray 1, 2 or 3)... RAP 6 C5: Top Tray Full.... RAP 7 E1: Paper Jam / Tray To Registration... RAP 8 E2-1: Paper Jam / Misfeed.... RAP 9 E2-2: Paper Jam/ Misfeed Duplex... RAP 10 E3: Paper Jam / Registration To Fuser... RAP 11 E4: Paper Jam / Exit... RAP 12 System Controller Isolation... RAP 13 J3: Print Cartridge Not In Position - Install/reset Print Cartridge. RAP 14 J5: Toner Low.... RAP 15 P1: Fuser Pause... RAP 16 U1: Motor Fail / Power Off Then On... RAP 17 U2: ROS Fail / Power Off Then On... RAP 18 U4: Fuser Failure / Power Off / On... RAP 19 U6: NVM Fail / Power Off Then On.. RAP 20 Fan Abnormal.... RAP 21 Low Paper Tray 1/2/3... RAP 22 Paper Size Error... RAP 23 J5 Toner Low.... RAP 24 Inoperative Printer... RAP 25 Malfunctioning LCD/LED... RAP 26 Inoperative Keypad.... RAP 27 Erratic Printer Operation... RAP 28 Power Supply.... RAP 29 Main Motor Assembly... RAP 30 Laser Assembly.... RAP 31 Fuser Assembly.... RAP 32 Registration Sensor... RAP 33 MBF No Paper Sensor.... RAP 34 Tray 1 No Paper Sensor... RAP 35 Stack Full Sensor.... RAP 36 E5: MBF Extended / Insert MBF.. RAP 37 Size Switch.... RAP 38 Registration Clutch.... RAP 39 Turn Roll Clutch Assembly... RAP 40 Tray 1 Feed Solenoid... RAP 41 MBF Feed Solenoid...
RAP 42 Toner Sensor Assembly... RAP 43 HVPS Assembly.... RAP 44 Electrical Noise... RAP - DIMM 1.... RAP - DIMM 2.... RAP - DIMM 3....
2-42 2-42 2-43 2-44 2-45 2-45 2-47 2-47 2-48 2-49 2-50 2-51 2-52 2-52 2-53 2-55 2-56 2-56 2-57 2-59 2-59 2-60 2-60 2-61 2-61 2-62 2-63 2-64 2-64 2-65 2-65 2-66

500 Sheet Feeder

RAP 48 Exit Sensor.... RAP 49 E2-1: Paper Jam / Misfeed 500 Sheet Feeder... RAP 50 Low Paper Tray 2 (or Tray 3) 500 Sheet Feeder.. RAP Sheet Feeder Feed Solenoid... RAP Sheet Feeder Assembly Not Recognized... RAP Sheet Feeder Feed Motor... RAP 54 C3: Tray Out / Install Tray 2 (or Tray 3)... RAP 55 Pre-Registration Sensor... RAP 56 C5: Add Paper To Tray 2 (or Tray 3)...

Duplex Unit

RAP 57 E7: Duplex Jam... RAP 58 E5: Top/R Cover... RAP 59 C5: Output Tray Full... RAP 60 Duplex Fail....

02/2000 2-26
RAP 24 Inoperative Printer
The main power cannot be switched on.
Ensure the power cord is properly connected to the wall outlet and to the back of the printer. The problem still exists. Y N Problem solved. Perform RAP 1, then return here. RAP 1 indicated that correct AC voltage is being supplied to the printer. Y N Notify customer that the power is out of specification. Perform RAP 2, then return here. RAP 2 indicated that correct DC voltage is being supplied to the printer. Y N Rap 2 instructed you to replace a component. Y N Perform RAP 3. Replace component as necessary. On the System Controller PWB, check the voltage on P/J3 between pins 1 and 2. The voltage is 3.3VDC. Y N Switch the printer power off. Disconnect P/J3 from the System Controller PWB. Switch the printer power on. Check the voltage between pins 1 and 2 on the disconnected plug. The voltage is 3.3VDC. Y N On the LVPS, check the voltage on P/J163 between pins 1 and 2. The voltage is 3.3VDC. Y N Replace the LVPS (REP 8.6). Repair or replace the harness between the LVPS and the System Controller (PL 9.2). Switch the printer power off. Remove any options connected to the System Controller PWB. Reconnect P/J3 to the System Controller PWB. Switch the printer power on. Check the voltage on P/J3 between pins 1 and 2 (if there are no options installed, follow the No path). The voltage is 3.3VDC. Y N Replace the System Controller PWB (REP 8.1). Switch the printer power off. Reinstall the removed options one at a time, switching on the power and checking for 3.3VDC on P/J3 between pins 1 and 2 after each one is installed. Replace the option just installed when the voltage fails. On the System Controller PWB, check the voltage on P/J13 between pins 1 and 2. The age is 5.0VDC. Initial Issue DocuPrint N2025/N2825 volt-
N Switch the printer power off. Disconnect P/J13 from the System Controller PWB. Switch the printer power on. Check the voltage between pins 1 and 2 on the disconnected plug. The voltage is 5.0VDC. Y N On the LVPS, check the voltage between P/J168 pins 1 and 2. The voltage is 24.0VDC. Y N Replace the LVPS (REP 8.6). Replace the System Controller +5.0VDC Power Supply (REP 8.9). Switch the printer power off. Remove any options connected to the System Controller PWB. Reconnect P/J3 to the System Controller PWB. Switch the printer power on. Check the voltage on P/J3 between pins 1 and 2 (if there are no options installed, follow the No path). The voltage is 3.3VDC. Y N Replace the System Controller PWB (REP 8.1). Switch the printer power off. Reinstall the removed options one at a time, switching on the power and checking for 3.3VDC on P/J3 between pins 1 and 2 after each one is installed. Replace the option just installed when the voltage fails.

Enter diagnostics and select Component Test. Scroll to Sensor Input test and press Enter. Manually actuate the Print Cartridge Sensor Assembly Actuator. The number on the LCD increments each time you press and release the actuator. Y N Replace the Print Cartridge Sensor Assembly together with the harness (REP 7.4). Replace the Print Engine Controller PWB (REP 8.5). Replace the Print Engine Controller PWB (REP 8.5). Run a test print. On the Print Engine Controller PWB, measure the voltage between P/J11 pin 5 and frame ground and between P/J11 pin 6 and frame ground. The voltage on both pins change from 0.0VDC to +1.1VDC then back to 0.0VDC. Y N Replace the Print Engine Controller PWB (REP 8.5). Replace the Laser Assembly (REP 7.1). The problem still appears. Y N Problem solved. Go to RAP 44.
A B Status Indicator Repair Analysis Procedures

RAP 30

02/2000 2-32

RAP 31 Fuser Assembly

Procedure WARNING
If the printer has been switched on, the fuser may be hot. Switch the printer power off. Remove the Fuser Assembly (REP 5.1). Measure the resistance between pins A1 & A2 and between pins 2 and 4 or 1 and 4 of P174 on the Fuser Assembly (Figure 1). The resistance between A1 and A2 reads between 10K and 350K ohms (depending on the temperature of the fuser) and the resistance between pins 1 and 4 reads less than 5 ohms. Y N Replace the Fuser Assembly (REP 5.1).
A Disconnect P/J171 from the Fuser PWB. Check for continuity between P17 pin 3 and P171 pin 1, P17 pin 2 and P171 pin 2 and P17 pin 1 and P171 pin 3. There is continuity between all pins measured. Y N Replace the Fuser Harness Assembly (PL 9.2). Reconnect P/J171, P/J172, and P/J17. Switch the printer power on. Measure the voltage between J17 pin 2 on the Print Engine Controller PWB and frame ground. The voltage in 3.3 VDC. Y N Measure the voltage between P/J16 pin 4 on the Print Engine Controller PWB and frame ground. The voltage in 3.3 VDC. Y N Replace the LVPS (REP 8.6). Replace the Print Engine Controller PWB (REP 8.5). Replace the Fuser PWB (REP 8.8). If the problem persists, replace the Print Engine Controller PWB (REP 8.5).
Figure 1 Fuser Connector (P174) Reinstall the Fuser Assembly. Remove the Lower Rear Cover (REP 1.7). Disconnect P/J172 from the Fuser PWB. Ensure that the Rear Cover is closed. Check the continuity between P172 pin 1 and P172 pin 3. There is continuity between P172 pin 1 and P172 pin 3. Y N Remove the Right Side Cover (REP 1.2). Ensure that the Rear Cover is closed. Check continuity between P/J172 pin 3 and both sides of the Rear Cover Interlock Switch. There is continuity between P/J172 pin 3 and both sides of the Rear Cover Interlock Switch. Y N Repair or replace the Fuser Wiring Harness (PL 9.2) or replace the Rear Cover Interlock Switch as necessary (PL 9.2). Replace the Fuser Harness Assembly (PL 9.2). Remove the Left Side Cover (REP 1.1) and the Print Engine Controller PWB Cover (REP 8.5). Disconnect P/J17 from the Print Engine Controller PWB. Check for continuity between P17 pin 7 and P17 pin 8. There is continuity between P17 pin 7 and P17 pin 8. Y N Replace the Fuser Harness Assembly (PL 9.2).

D Switch the printer power off. Remove the printer Left Side Cover (REP 1.1) and the Print Engine Controller PWB Cover (REP 8.5). Switch the printer power on. Measure the voltages on P/J13 pin 5 as you actuate the switches (see Table 1). All voltages are correct. Y N Check for continuity between P/J13 pin 5 (Print Engine Controller PWB) and P/J131 pin 5 and between P/J131 pin 5 and P/J132 pin 5 (Feeder PWB). (P/J131 is the connector between the printer and the 500 sheet feeder). Repair or replace the harness as necessary. Replace the Print Engine Controller PWB (REP 8.5).
Switch the printer power off. Remove the Left Side Cover (REP 1.1) from the printer. Disconnect P/J20 from the Print Engine Controller PWB. Check the continuity between the following pins, of the disconnected plug, while pressing the switches: P20-7 and P138-3 when pressing SW1 Bottom P20-6 and P138-3 when pressing SW2 P20-4 and P138-3 when pressing SW3 P20-3 and P138-3 when pressing SW4 Top
There is continuity in each case. Y N Check for pin to pin continuity of the Size Sensor Harness. Repair or replace as necessary. If the harness is OK, replace the Size Sensor Switch (PL 3.1). Replace the Print Engine Controller PWB (REP 8.5). The size sensors appear to be working correctly. If the problem persists, replace the Print Engine Controller PWB (REP 8.5). Enter Diagnostics and select Component Test. Scroll to Sensor Input test and press Enter [4]. Press and release the 2000 Sheet Feeder A4 Paper Sensor. The number on the LCD increments each time you press and release the sensor actuator. Y N Switch the printer power off. Disconnect P/J604 from the 2000 Sheet Feeder PWB. Check the resistance between pins 5 and 6 as you actuate and deactuate the Paper Size Sensor. The resistance is zero when the sensor is actuated and infinite when deactuated. Y N Replace the 2000 Sheet Feeder A4 Paper Sensor (PL 12.2). Replace the 2000 Sheet Feeder PWB (REP 12.10). Replace the Print Engine Controller PWB (REP 8.5).
There is continuity in each case. Y N Check for pin to pin continuity of the Size Sensor Harness. Repair or replace as necessary. If the harness is OK, replace the Size Sensor Switch (PL 3.1). Reconnect P/J138 to the feeder PWB. Switch the printer power on. Measure the following voltages on P/J132 pin 5 as you actuate the switches (see Table 1). Table 1 Size Switch Voltages Press Actuator 4 (top) Voltage 1.4VDC 2.3VDC 2.8VDC Press Actuators Voltage 4&3 4&2 3&2 0.4VDC 0.9VDC 1.8VDC Press Actuators Voltage 4, 3, & 2 None 0.0VDC 3.3VDC

There is the continuity between all pins measured. Y N Replace the 2000 Sheet Feeder Harness Assembly (PL 12.2). Replace the Print Engine Controller PWB (REP 8.5).
There is continuity between all pins measured. Y N Replace the appropriate harness. Replace the Print Engine Controller PWB (REP 8.5). Replace the Print Engine Controller PWB (REP 8.5).

02/2000 2-61

RAP 65, RAP 66
C J501-2 and J19-12 J501-3 and J19-11

RAP 67 C5: OCT Tray Full

Error code indicates that the OCT Output Tray is full.
There is continuity between each of the pins. Y N Repair or replace the Duplex Interface Harness, as necessary (PL 9.1). Replace the Duplex Interface PWB (REP 8.3). Switch the printer power off. Disconnect P/J507 from the Stack Full Sensor. Check the continuity between P/J507 and P/J527 as follows. J507-1 and J527-3 J507-2 and J527-2 J507-3 and J527-1
There is continuity between each of the pins. Y N Repair or replace the Stack Full Sensor(REP 5.2) or Stack Full Sensor Harness (PL 6.1), as necessary. Replace the Stack Full Sensor (REP 5.2). Replace the Print Engine Controller PWB (REP 8.5). It appears that the Stack Full Sensor is working correctly. If a problem persists, replace the Print Engine Controller PWB (REP 8.5).
There is continuity between each of the pins. Y N Repair or replace the Stack Full Sensor Harness, as necessary (PL 6.1). Disconnect P/J501 from the Duplex Interface PWB and P/J19 from the Print Engine Controller PWB. Measure the resistance between P/J501 and P/J19 as follows: J501-1 and J19-13 A B C Status Indicator Repair Analysis Procedures Initial Issue DocuPrint N2025/N2825

RAP 67

02/2000 2-62

RAP 68 E8: OCT Jam

There is a paper jam at the OCT Sensor.
N Replace the OCT Sensor (REP 9.6).
The front edge of the paper is located within the Exit Assembly. Y N Remove and reinstall the OCT Assembly (REP 10.1). Run a Test Print for simplex print. The Error Code E4 still appears. Y N Problem solved. The paper is discharged from the top of the OCT Assembly. Y N Rotate the 14/33 Idler Gear counter clockwise manually. Observe the correct contact between the 14/33 Idler Gear and the 29 Gear and Offset Gear. All of the gears rotate smoothly. Y N Replace parts as necessary (PL 13.1). Run a Test print. Observe the rotation of the Inlet Roll and Offset Roll (REP 10.12). The Inlet Roll and Offset Roll rotates in the same direction smoothly. Y N Replace the OCT Motor Assembly (REP 10.10). Press and release the actuator of the Duplex Sensor (REP 9.6). The Duplex Sensor actuates by lifting up the actuator and deactuates by releasing the actuator. Y N Replace the OCT Sensor (REP 9.6). Replace the Print Engine Controller PWB (REP 8.5). Remove the Top Cover (REP 1.3). Remove the Rear Cover Assembly (REP 1.9). Rotate the Inlet Roll counterclockwise manually. The Inlet Roll rotates smoothly. Y N Replace the OCT Assembly (REP 10.1). Rotate the 14/33 Idler Gear counter clockwise manually. Observe the correct contact between the 14/33 Idler Gear and the 29 Gear and Offset Gear. All of the gears rotate smoothly. Y N Replace parts as necessary (PL 13.1). Run a Test print. Observe the rotation of the Inlet Roll and Offset Roll. The Inlet Roll and Offset Roll rotates in the same direction smoothly. Y N Replace the OCT Motor Assembly (REP 10.10). Press and release the actuator of the OCT Sensor (REP 9.6). The OCT Sensor actuates by lifting up the actuator and deactuates by releasing the actuator. A Initial Issue DocuPrint N2025/N2825

REP 1.7 Lower Rear Cover

Switch off the power and disconnect the Power Cord. 1. 2. Remove the four screws that secure the Lower Rear Cover to the printer (Figure 1). Remove the Lower Rear Cover (Figure 1).
Figure 1 Lower Rear Cover

Figure 1 HVPS Cover

REP 1.6, REP 1.7

02/2000 4-8

REP 1.8 MBF Gear Cover
Parts List on PL 4.2 Removal WARNING
Switch off the power and disconnect the Power Cord. 1. 2. 3. 4. 5. Remove the MBF Assembly (REP 2.1). Remove the screw that secures the Left MBF Gear Cover to the left side of the Paper Handler (Figure 1). Release the three locking tabs and remove the MBF Gear Cover (Figure 1). The MBF 2 Idler Gear (Figure 1) may come off with the cover. Release the locking tabs and remove the harness from the MBF Cover (Figure 1).

REP 1.9 Rear Cover

Parts List on PL 6.1 Removal WARNING
Switch off the power and disconnect the Power Cord. 1. 2. 3. 4. Open the Rear Cover. Disconnect P/J527 and P/J528 (Figure 1). Remove the two screws that secure the Rear Cover support straps to the Rear Cover (Figure 1). With the cover positioned as show in Figure 1, lift the left end (as viewed from the rear of the printer) of the Rear Cover and remove (Figure 1).

Figure 1 MBF Gear Cover

Figure 1 Rear Cover

02/2000 4-9

REP 1.8, REP 1.9

02/2000 4-10

REP 2.1 MBF Assembly
Switch off the power and disconnect the Power Cord. 1. 2. 3. 4. 5. 6. 7. 8. 9. Remove Tray 1. Open and extend the MBF Assembly to the paper load position (Figure 1). Remove the screw that secures the cover to the left side of the MBF Assembly (Figure 1). To release the locking tab, push in slightly on the left front of the cover and rotate the cover clockwise to remove (Figure 1). Release the harness from the underside of the cover (Figure 1). Disconnect the in-line connector P/J121 (Figure 1). Push the MBF into the home position. Push down on the left tray stop, pull out to remove (Figure 2). Push down on the right tray stop, pull out to remove (Figure 3).
10. Extend the MBF Assembly until it stops. 11. Lift the front of the paper handler 1.5 to 2" (38 to 51 mm) and remove the MBF Assembly. Figure 2 Left Tray Stop
Figure 1 Paper Handler Assembly

Figure 3 Right Tray Stop

02/2000 4-11

REP 2.1

REP 2.2 MBF Feed Roll
Parts List on PL 4.1 Removal WARNING
Switch off the power and disconnect the Power Cord.Power Cord. 1. 2. 3. Remove the MBF Assembly (REP 2.1). For the Left Feed Roll, lift the locking tab on the Left MBF Roll Core and slide the core to the left. Slide the MBF Feed Roll to the left and remove (Figure 1). For the Right Feed Roll, lift the locking tab on the Right MBF Roll Core and slide the core to the right. Slide the MBF Feed Roll to the right and remove (Figure 1).
REP 2.3 Tray 1 Turn Roll Clutch Assembly

10. Note the position of the actuator spring (Figure 1). 11. Move the Registration Actuator to its full actuated position. 12. Slide the Registration Actuator to the left to disengage the right end of the actuator (Figure 1). Pull the actuator up and out of the Paper Transport Assembly. 13. Remove the spring from the Registration Actuator.
Figure 1 Registration Actuator

REP 4.2

02/2000 4-26
REP 4.3 Registration Clutch
REP 4.4 Metal Registration Roll
10. Remove the E-ring that secures the Registration Clutch to the Rubber Registration Roll (Figure 1). 11. Remove the Registration Clutch (Figure 1).
10. Remove the Registration Clutch (REP 4.3). 11. Release the left and right Registration Springs (Figure 1). 12. Remove the left and right E-rings (Figure 1). 13. Remove the Gear from the right end of the Metal Registration Roll (Figure 1). 14. Remove the right and left bearings (Figure 1). 15. Lift the right end of the Metal Registration Roll. Slide the roll to the right to free the left end of the roll. Then slide the roll to the left to remove (Figure 1).
Figure 1 Metal Registration Roll
Figure 1 Registration Clutch

02/2000 4-27

REP 4.3, REP 4.4
REP 4.5 Rubber Registration Roll
REP 4.6 Registration Sensor
Switch off the power and disconnect the Power Cord. 1. 2. 3. 4. 5. 6. 7. 8. 9. Open the Rear Cover. Remove the Fuser Assembly (REP 5.1). Open the Top Cover and remove the Print Cartridge. Cover the cartridge to protect it from light. Remove Tray 1. Remove the MBF Assembly (REP 2.1). Remove the Left Side Cover (REP 1.1). Remove the Top Cover Assembly (REP 1.3). Remove the HVPS Cover (REP 1.6). Remove the Paper Transport Assembly (REP 4.1).
10. Remove the Registration Clutch (REP 4.3). 11. Remove the Metal Registration Roll (REP 4.4). 12. Remove the E-ring that secures the Registration Gear to the right end of the Registration Roll (Figure 1). 13. Remove the Registration Gear from the Registration Roll (Figure 1). 14. Remove the left and right bearings from the Registration Roll (Figure 1). 15. Lift the right end of the Registration Roll and remove (Figure 1).
10. Remove the HVPS PWB (REP 8.2). 11. Disconnect P/J183 from the Registration Sensor (Figure 1). 12. Release the three locking tabs and remove the sensor (Figure 1).
Figure 1 Registration Sensor Figure 1 Rubber Registration Roll

Replacement Replacement

Item Down

Value Up

Menu Up

02/2000 6-21

GP 3.2

Table 1 Control Panel Key Usage Key Value Down Action - If in the menu system and an item is displayed, this key causes the Control Panel to scroll through the values for the current item in order top to bottom, unless a higher priority message is displayed preempting menu navigation. Scrolling wraps, such that if the displayed value is the bottom value, pressing this key scrolls to the top value. If no value for the current item is displayed (Item key was pressed but Value key not yet pressed for this item), pressing this key displays the default value for the current item. When setting a numeric value, passing this key decreases the value by the step amount. It is subject to auto-repeat if held down by more than 1 second, after which the value scrolls repeatedly until the key is released. The decrement for each step may be greater than that for a single key press. - If not in the menu system, and a paper mismatch condition does not exist, this key is ignored. - If a Paper Mismatch condition exists, pressing this key scrolls through the alternate paper that may be used instead of the requested paper. - If in the Password menu, and the display indicates "Enter Password," pressing this key causes a password digit "7" to be entered. - If the current display is a value for an item, pressing this key causes the value to be entered as the default value for this item. The currently displayed value is immediately loaded in NVM. The display then returns to indicate the current menu on the top line and the current item on the bottom line. - If the current display is an action to be invoked (e.g., PCL Font List), pressing this key causes the action to take place. Following the action, the display returns to indicate "Ready" on the top line. - If not in the Menu system, and the Form Feed LED indicates that a partial page exists, pressing this key causes an implied PCL reset and the partial page is printed. - If a paper mismatch condition exists, and a request to use an alternate paper is displayed, pressing this key causes printing on the alternate paper. - If in the Password menu, and the display indicates "Enter Password," pressing this key causes a password digit "4" to be entered. Table 2 Menu System Helper Symbols Symbol = Helper Function When at a point where a value may be changed, the item name is displayed on the top line with the "=" symbol in the last character position, and the selected value is displayed on the bottom line. When first arriving at a point where a setting may be changed, the current value is displayed on the bottom line and a * symbol appears next to it in the right most column. Pressing Up Value or Down Value scrolls through the possible values. Whenever the current value is displayed, the * is displayed in the right most column. Pressing Enter causes the * to display in the right most column for the new value. Since pressing Enter causes the display to indicate the current menu and current item, the asterisk may not be seen until the item and current value is displayed again by pressing a Value key.

Delete All Jobs - Reset Menu selection to delete all Secure and Proof jobs from the disk. The display indicates "Please Wait" on the bottom line while this action is being processed, and returns to "ready" when the action is complete. If the disk is locked, the display indicates "Disk Locked" for 10 seconds and then returns to "Ready." Demo Mode - Reset Menu selection to place the printer in the demo mode. Once in this mode, the printer will print demo pages using the eight Control Panel keys to select the type of demo page. Once selected, the printer will enter this state automatically every time the power is cycled. The Demo Mode is entered by power-on while holding down the On-line key and Enter Key, scrolling to the Demo Mode using the Item keys, selecting Yes using the Value keys and pushing the Enter button. The Demo mode is exited by power-on while holding down the Online key and Enter Key. If the Demo mode was enabled when the proceeding power on procedure was performed, it is used to exit the Demo mode only, and the Reset menu is not enabled. Demo Page - Print Menu selection to print a demonstration page that shows the printer features. It will be printed using the PCL default paper size and type at 600 x 600 dpi. Disk Directory - Print Menu setting to request printing the disk directory. Only one copy of the directory is printed regardless of the setting of System Menu>Print Quantity. Disk Format - Reset Menu setting to request a complete format of the disk. Disk Unit - Reset Menu setting to request initialization of the disk. Display Faults - Print Menu setting to display the last 50 faults on the Control Panel. DLC/LLC Enable - Menu setting in the Ethernet or Token Ring menu to enable the DLC/LLC protocol. This item is common between the Ethernet and Token Ring Menus. DLC/LLC Bin PS - Ethernet or Token Ring Menu setting to enable/disable the DLC/DLL binary mode of PostScript. DLC/LLC PDL - Menu setting for the default emulation for the DLC/LLC protocol. This item is common between the Ethernet and Token Ring Menus. Draft Mode - System Menu setting to control the reduced toner mode for draft printing. Duplex - Menu setting for Postscript and PCL to set the default duplex mode if installed. Long Edge or Short Edge refers to the printing direction on the back side of the sheet and is also a function the orientation (landscape or portrait) of the page. Edge to Edge - Menu setting in the System menu to select the printable area in PCL. Setting this parameters to ON results in all margins of "0" allowing images to be placed at the edge of the paper on all sides. The logical page size becomes the physical page size. Ethernet Menu - Menu selection to invoke the Ethernet menu. Ethertalk Enable - Menu setting in the Ethernet menu to enable the Ethertalk protocol.

LAA - Menu setting in the Token Ring menu to manually set the 4 Locally Administered Address bytes. If this parameter is set to "0," then the Token Ring hardware address is used. If set to any value in the range 400000000000 to 7FFFFFFFFFFF, then this parameter replaces the Token Ring Hardware address. Language - Menu setting for the spoken language used for Control Panel display messages, Configuration Sheets, Font Lists, Demo Pages, etc. The value of this setting is not affected by performing a Factory Default. It does not have a default value apart from the initial value of English that is used when the printer is powered up for the first time. It may be manually set to another language using PJL commands. Otherwise, it will be left at its initial value of English. Line Termination - PCL menu setting to add a Carriage Return after every Line Feed appearing in PCL text. This setting enables the <LF>=<CR><LF> line termination mode in PCL as the default. LPR Banner - Ethernet or Token Ring Menu setting to enable/disable the LPR banner page. LPR Binary PS - Ethernet or Token Ring Menu setting to enable/disable the LPR binary mode of PostScript. LPR Enable - Ethernet or Token Ring Menu setting to enable/disable the LPR protocol. LPR PDL - Ethernet or Token Ring Menu setting for the default LPR emulation. MBF Size - Tray Menu setting for the paper size that is loaded in the MBF. Since the MBF does not have paper size sensing, this value must be entered manually. MBF Type - Menu setting for the paper type loaded in the MBF. Menu Map - Menu selection to print a page showing the configuration of the Control Panel menu. NDS Tree - Menu setting in Novell menu to set the NDS Tree string. NDS Context - Menu setting in Novell menu to set the NDS Context string. NetBEUI Bin PS - Ethernet or Token Ring Menu setting to enable/disable the BetBEUI binary mode of PostScript. NetBEUI Enable - Ethernet or Token Ring Menus setting to enable/disable the NetBEUI interface. NetBEUI PDL - Ethernet or Token Ring Menu setting for the default emulation for the NetBEUI protocol. Network Defaults - Menu setting to force all NVM parameters associated with the Ethernet and Token Ring interfaces to return to their factory default settings. Note that this action will reset the Novell PServer Name, the TCP/IP Address and other parameters which might require the printer be re-installed on the network. The reset action is taken when the Enter key is pressed, after selecting Yes via the Value keys. The display indicates Please Wait on the bottom line while this action is being processed, and returns to Ready when the action is complete. Initial Issue DocuPrint N2025/N2825

02/2000 6-49

GP 4.8

02/2000 6-50

GP 5.1 Print Process Overview
Print Process Overview The N2025/N2825 printer uses the Xerographic process to print an image on paper using video data sent from the Controller. The Xerographic process consists of seven steps: Figure 1 1. 2. Charge A bias charge roll places a uniform negative electric charge on the drum surface. Exposure The laser scanner scans the drum surface with a very thin beam of laser light modulated according to the signal from the Controller to form an invisible electrostatic latent image on the drum surface. 3. Development Attracts toner to the electrostatic latent image on the drum surface to form a visible toner image. 4. 5. 6. 7. Transfer Transfers the toner image from the drum surface to the paper. Detack Partially neutralizes the charge on the paper to allow the paper peel off the drum surface. Fusing Permanently fixes the toner image to the paper by heat and pressure. Cleaning Cleans the drum surface of the remaining toner.
Figure 2 the major components that are directly related to the print process and the paper transportation.
Figure 1 Xerographic Process The drum surface is passed through the Charge, Expose, Develop, Transfer, Detack, and Clean steps by rotating the drum to form an image of toner on the drum surface and transfer the toner image to paper. Paper is passed through the Transfer, Detack, and the Fuse steps by the paper transportation mechanism and is registered to the image to transfer the toner image from the drum surface to it and to fix the toner image.
Figure 2 Print Process and Paper Transportation

02/2000 6-51

GP 5.1
Print Process Description 1. Charge This step places a uniform negative electric charge on the drum surface (the outside surface of the photoconductive layer, to be exact*). Figure 3 The charge is given by the BCR (Bias Charge Roll) in the Print Cartridge. The BCR is a conductive roll disposed in direct contact with the drum surface. A discharge voltage is applied to the BCR from the HVPS. The discharge voltage is an AC voltage with a negative DC bias voltage superimposed. The AC voltage is controlled by constant-current regulation. The discharge occurs in the very small gaps between the BCR and the drum surface. Any unevenness in the charge on the drum surface resulting from the previous cycle is leveled by the AC discharge between the BCR and the drum surface, and the drum surface is uniformly charged again to the same voltage as the DC bias voltage with respect to the inner conductor of the drum. *The drum is an aluminum cylinder with a coating of photoconductive material on the surface.

NOTE: The printer interrupts the Erase Cycle when the interlock switches are deactuated, or the Registration Sensor, Exit Sensor or Sensor Assembly Dup is actuated during the Erase Cycle. It restarts the Erase Cycle when the interlock switches are actuated again, or printer power is switched off and back on again. The printer does not start an Erase Cycle if the Registration Sensor, Exit Sensor, or Sensor Assembly Dup is being actuated or the Print Cartridge is not in place when the interlock switches are actuated or printer power is switched on.

Fan Control

The printer switches the speed of the Fan between High and Low. -High Speed: When the Main Motor is rotating -Low Speed: When the Main Motor is stopped When printer power is switched on, the Fan rotates at High Speed, then switches to Low Speed.

FE(FD-FE) 120

FD(FC-FD) 140 FB(FA-FC) 145
EE(EC-F0) 170 E9(E7-EB) 175

Erase Cycle

The printer executes the Erase Cycle when printer power is turned on or the interlock switches are actuated. During an Erase Cycle, the printer runs the Motor:Main, actuates the Registration Clutch, and Turn Clutch Assembly and outputs the CR(AC), CR(DC), DTS, and BTR(-) voltages from the HVPS to clean the drum surface and drive the paper remaining in the printer to a sensor for detection.

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GP 5.21 Duplex Assembly
Paper is fed from the Cassette Assembly or the Tray Assembly MBF and transported through the printer to the exit along the paper paths shown below when the optional Duplex Assembly is installed. The Duplex Assembly adds the re-feed path for duplex printing to the printer. Figure 1
Figure 2 is a cut-away side view of the N2025/N2825 printer that shows the paper paths and the major components directly related to the paper transportation of the printer with the optional Duplex Assembly installed.

Drive Power Transmission

The optional Duplex Assembly has its own motors (Motor Assembly Dup and Motor Assembly Exit) for paper transportation. The drive power generated by the Motor Assembly Dup is transmitted to the paper driving rolls in the Duplex Assembly through the drive gears and belt. This drive power is used to transmit the paper through the path toward the Registration Roll after receiving the return paper from the Exit Assembly. The drive power generated by the Motor Assembly Exit is transmitted to the paper driving rolls in the Duplex Assembly and Exit Assembly. This drive power is used to deliver the paper from the Exit Assembly to the Duplex Assembly and discharge it from the Exit Assembly after the completion of side 2 printing.

CN2 F-42

Figure 15

02/2000 7-30

Figure 16

Figure 17

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Location of P/J Connectors
Use the P/J table below and the P/J map on the next page to locate a specific P/J connector within the Feeder and Cassette Table 1.To find the location of a P/J: 1. 2. 3. 4. 5. Locate the P/J connector number in the first column of the table. Locate the corresponding coordinates in the second column, such as I7 or J7. Go to the map. Cross-reference the letter and number of the P/J coordinates with the letters and numbers on the map. The P/J connector is located within the area where the coordinates cross. Table 1 P/J Locations Location (Note 1) Coordinate s Location Name PL D8 Feeder Assembly Harness (Note 2) Harness Name (Note 3) Notes Item # 23 Intermediate connectors between J13A of the NPS Harness and J13A of the Feeder Harness. Connects the Feed Motor to the Feeder PWB. Connects the Harness Assembly J131 to the Harness Assembly J136 of the Upper Feeder (Feeder 1 or Feeder 2). Connects the Harness Assembly J131 to the Harness Assembly J131 of the Lower Feeder (Feeder 3). Connects the Harness Assembly J131 (the harness for connection to the Feeder PWB of the upper Feeder (Feeder 1 or Feeder 2)) to the Feeder PWB of the Feeder. 27 Connects the Feeder Harness to the Feeder PWB. 136 DD8 P/J 134
Table 1 P/J Locations Location (Note 1) Coordinate s Location Name PL F8 Harness (Note 2) Harness Name (Note 3) Notes Item # 23 Connects the No Paper Sensor to the Harness Assembly J134. Connects the Feed Solenoid to the Feeder Harness. Connects the Harness Assembly J136 (the harness for connection to the Feeder PWB of the lower Feeder Assembly J136 (Feeder 3)) to the Feeder PWB of the Feeder. Connects the Low Paper Sensor to the Feeder Harness. Connects the SNS Harness to the Feeder PWB. Connects the Size Sensor to the SNS Harness.
Feeder PL 11.2 Harness Assembly
Feeder PL 11.3 Harness Assembly Feeder PL 11.2 Harness Assembly

P/J 13A

PL 11.2 Harness
Feeder PL 11.2 Feed Motor ConAssembly nector Feeder PL 11.2 Harness Assembly
Feeder PL 11.3 Harness Assembly Feeder PL 11.3 Harness Assembly Feeder PL 11.3 Harness Assembly

J131 B8

PL 11.2 Harness Feeder Assembly
PL 11.3 Harness Feeder Assembly

02/2000 7-32

20. Print Engine Controller PWB "Feeder 2 PWB "Low Paper Sensor, No Paper Sensor, Tray 1 Feed Solenoid, Switch Size and Motor Feed 2 Figure 2 20. Feeder 2 PWB "Feeder 3 PWB" Low Paper Sensor, No Paper Sensor, Tray 1 Feed Solenoid, Switch Size and Motor Feed 3 Figure 3 20. Print Engine Controller PWB "Feeder 2 PWB ("Feeder 3 PWB) "Low Paper Sensor, No Paper Sensor, Tray 1 Feed Solenoid, Switch Size and Feed Motor 2 (or 3) Table 2, Table 3, Table 4, Table 5, Figure 4, and Table 6. This section contains a Master Wiring Diagram for the 500 Sheet Feeder. The Master Diagram shows the interconnections of the printer, the 500 Sheet Feeders, and the components of the 500 Sheet Feeders. The remainder of this section shows the signal names, pin numbers, and other information in detailed diagrams.

Product Safety Data Sheet
Product: DocuPrint N2025 / N2825 PSDS No.: 0830 ISSUE DATE: 01/26/00 REV. DATE: 01/10/01 Emergency No. (585) 422-2177
Section I - Product Identification Manufacturer's Name Xerox Corporation Manufacturer's Address El Segundo, California 90245 Product Designation DocuPrint N2025 / N2825 Section II - Electrical Information Line Voltage (Volts) Line Current (Amps) 9 Freq. (Hertz) 60
EH&S Inquiries (800) 828-6571

Product Code YIA-1

Branch Cir. Protection (Amps) 15 Power Consumption (Watts)* Running: 891 Standby: 31 Power Saver: 33
Line Cord/Plug Specification Equipped with Appliance Coupler Supplied with Detachable Cord NEMA Type 5-15P Agency Approval UL1950 File Number E51242 cUL1950 File Number E51242 Section III - Supplies CRU (Black Toner) Xerox Part No. 113R00443
Material Safety Data Sheet Article ** (A12)
Section IV - Environmental Information Product Size Configuration: (Centimeters/Inches) D: 46 / 18 W: 49 / 19 H: 40 / 15 Heat Emission* (BTU/HR) Running: 3,046 Standby: 106 Environmental Limitations Min Max Relative Humidity (%) Ambient Temp. (oC) 5 35
Floor Space Requirements (Meters / Feet) N/A - Desktop Product
Weight (K Grams / Lbs.) 26.0 / 57.3
* Based on a five minute average ** MSDS is not required by OSHA, Hazard Communication Std., 29 CFR or WHMIS HPA (Section II (2) ) www.xerox.com Reference About Xerox

PRODUCT:

DocuPrint N2025 / N2825

PSDS No. 0830

Section V - Emission/Exposure Information* Light Source FDA Accession # FDA registered Class 1 Laser System 9822271-01 There is no operator or service access to the beam. Semiconductor Laser Diode Electromagnetic Emissions US FCC: Class B Canada IC: Class B
Audible Noise Printing 49 dB (A) Standby 35 dB (A) Impulse 60 dB (A) Ozone Concentration Based on Simulation Model: Daily Copy Volume 13,400 copies/8 hours Room Size 16 m3 1/2 Air Room Change per Hour

TLV** 85 dB (A)

0.0199 ppm (TWA) 0.020 ppm (STEL) Total Dust 0.004 mg/m3

TLV 0.1 ppm

TLV 10 mg/m3
* Based on a five minute average ** TLV (Threshold Limit Value) and PEL (Permissible Exposure Level) respectively set by American Conference of Government Industrial Hygienists and by Occupational Safety and Health Administration. These levels are considered maximum exposure permitted to ensure no health hazard. TWA (Time Weighted Average) for a normal eight hour workday.
All measurements were made on products performing within established operating specifications and received recommended maintenance procedures. Xerox certifies that this product meets or exceeds the applicable standards for safety and emissions. www.xerox.com Reference About Xerox