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U9 in wc group is problem with HVPS. check charge & trf corotrons for leakage. isolate with removing charge or transfer corona each at a time.... U9 disappears; Reinstall HVT. Clean charge corona sawtooth & grid; tighten the grid on charge corona assembly.
This indicates a communication failure between the Main Control Unit and the operation control circuit board. Power the machine down and disconnect from hte power supply. Check all the connectors and wiring on the boards and also any loose wiring that may be grounding the machine. Power back up and if the fault persists a qualified copier engineer will be required.
Hello sir; There is a reset procedure require;
hold down 0 while you turn on the power, then enter 20 press start enter 3 press start. turn power off and on.
if its a u9-1 code it is the lamp that is faulty. Sometimes it can be the connections either end of the lamp but normally the lamp itself. It will probably cost as much to fix as it would to get a new one to be honest
The Exposure sensor detected low Exposure Lamp intensity. Switch the Main Power Switch off then on in order to clear the Status Code. Go to the U9-3 Xerographic Process Problem RAP
U9-4 Xerographic process problem.
The Main PWB sensed that the Toner Dispense Motor was not running. Perform 20-3 U Codes Clearance . Go to the U9-4 Xerographic Process Problem RAP
U9-5 Xerographic process problem.
The CSDC zero point was too high during auto setup. Perform 20-3 U Codes Clearance . Go to the U9-4 Xerographic Process Problem RAP U9-5 Xerographic Process Problem RAP .
That is normally just a dirt issue.
Clean the following.
1. Midway down the right side door, there is a channel with a very thin wire running through it. Gently brush out that channel, then dampen a Q-tip with alcohol and clean that wire, Apply just slight pressure so you do not break the wire.
2. On that same right hand door, near where the paper exits, you will see a silver metal,"sawtooth" shaped strip. Most likely you will notice it is covered with ink. Brush it clean, if you need to take a dry cloth and gently clean it.
3. Remove the copy cartridge. Look on the bottom right side of the machine, you will see a set of contacts. 2 parallel contacts, per set. Clean all the excess ink off of those also. Dry brush or cloth. then look on the cartridge and clean any corresponding contacts in the machine.
4. Check on the upper left there is a door connector. Just make sure none of the tabs are broken on that.
Keep in mind, there are horizontal and vertical contacts to clean on the right side of the machine.
The vast majority of the time. Carefully and throughly cleaning those contacts and that machine area in general will resolve a U9. Pretty common on that machine. It is caused from the high voltage in the machine arching, due to dirty contacts.
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