SOURCE: Okidata C9500 DXN--Printing Issues
Your asking a bit much
1) - Power ON printer while holding both the + & - buttons until “OKIUSER” message appears in LCD.
2) - Press + or – button until “ENGINE DIAG MODE” is displayed.
3) Press "ENTER", displayed will be "DIAGNOSTIC MODE XX.XX.XX S-MODE"
4) Press + or – button until “NV-RAM INITIAL” is displayed.
Half way, dont stop too long it will time out....
5) Press "ENTER" again.
6) Will appear "TABLE 1" message.
7) Press "ENTER" until "EXECUTING RESET" message appear. ...............the "NV-RAM INITIAL" message will BLINK.
Tada....This procedure reset TONER, DRUM, FUSER and BELT...life counts
8) power OFF printer, wait 10 sec, and power ON again..
To access Service Mode in C9300 power ON printer with 0, 1, 6, 7 at same time...you can do some good damage in there!! (I warned ya!)
Resetting consumables for OKI C7300,C7500,C9300 printer I think!
1. Hold buttons 0 + 1 + 6 + 7 on startup.
2. Press button 0 several times until "DIAGNOSTIC MODE xx.xx.xx" shows.
3. Hold buttons 2 + 3 until "ENGINE DIAG LEVEL 4" shows.
4. Press button 1 to scroll to "COUNTER SET".
5. Press button 2 to scroll through menu items (button 6 scrolls backwards)
6. To alter the value of an item, first press button 3 to select the digit to be altered. The selected digit will slowly flash. (Button 3 moves to the right through the digits. Button 7 takes you to the left.)
7. Then press button 2 to increase the value of the selected digit. Press button 6 to decrease the value.
8. When the changes have been made hold buttons 1 + 3 + 5. The screen will flash three times and then an * will appear on the right of the screen. The new value is set.
9. To leave the counter set menus, turn the printer off.
IMPORTANT
Each colour toner counter shows life as percentage used. So a toner showing 30% has used up 30% of its toner. 100% would indicate a near empty toner. This is the reverse of the toner life shown from the "usage menu" when the printer is in normal operation, which shows the toners as a percentage life remaining. You will want toner showing 00%. note:this is oposite of what you see in user mode
Some models exhange these steps
3) HOLD 0 + 4 "ENGINE DIAG LEVEL 2" shows
4) Press 1 to cycle to "fuser unit"
5) 2 to scroll to TONER
REST IS SAME WE WANT TO SET WHAT i GUESS IS AT 100% TO 0%.
SOURCE: Okidata B6300 tray 1 jam issues
It should be a problem caused by the papek pickup module. It must be replaced.
SOURCE: oki c5250n paper jam
Unfortunately this may require and engineers visit. If you pull down the MP assembly by using the handle in the middle at the front of the printer you can then see a small "gearbox" at the right hand side of the transfer belt. This is common to feeds from both trays and could be worn. If you remove tray 1 and temporarily tape up the sensor arms to fool the printer into thinking it has a full tray installed, you can the test, by applying a little pressure to the feed roller, to see if it positively moves forward or if you are able to stop it turning. On a brighter note, you may just need new rollers instead of cleaning them.
SOURCE: Paper jam message
check the paper tray to make sure paper goes up. Also check to see if there are any obstructions in the paper path.
I’m happy to help further over the phone at https://www.6ya.com/expert/eric_7148ad2a373711a3
2
Open the front cover and remove the toner cartridge. Examine the area inside the printer and remove any jammed media you find there.
3
If you have a duplex option installed, also remove the duplex access tray and remove any jammed media you find there.
4
If you were printing from an optional paper tray, such as tray 2 or tray 3, open any optional trays, starting at the top, and remove any jammed media. Pull the print media either up or down. If it does not pull easily one way, try the other way
5
If you are printing from an optional 2000-sheet feeder, open the front door. Press the elevator button (A) to lower the tray. Remove any partially fed media from the feeder. 
button to try printing again. 48 views
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