U9 error code right after the machine is turned on

we are facing problem Kodak i4600 scanner error u9 .we replaced udds Sensor same problem.

Sep 2010 ... What does error code L6-10 mean on a Sharp AR-235 ... my machine sharp a 235 say call for service u9-99 what dos it mean and how can i

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.

u9 error code means there was a problem with voltage to the unit.Can be caused be either overage or a shortage. Have you had any power outages?

Hello sir; The U-9 code means the main control unit/switch board problem, replace it.

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

U9-3
Xerographic process problem.

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 code normally means you need to do some cleaning to the machine. The majority of the time it is caused by High Voltage arching.
1. Open the right hand door. About mid way down you will see an opening with a very fine wire in it. just a little thicker than a hair. Take a Q-tip with some alcohol and clean that wire. Also gently brush that area BEFORE cleaning with a q-tip to remove as much ink frmo the channel as you can.
2. Towards the top of that door, there is a metal strip, looks like a saw blade, has triangular points on it. I would assume it is pretty black now and not silver. Take a brush and clean that. then gently take a cloth dampened with alcohol and wipe it , very gently until you get it reasonibly clean.
3 Remove the drum cartridge and look for all the contact points. Mostly the ones on the lower right side. Clean all the ink ( toner) from that contact area and look around for all the other contacts to that cartridge.
I would say there is a 90 percent likelyhood this is your problem.

Low line voltage and line spikes can cause this problem, But far less likely.

hi im jules_09,are you sure its an error code?chek first all sensor on front door and other parts of the copier that has a sensor,