AR-207 copier has "CH" flashing what to do?

ch usually means that a door is open the front or side doors. also check that your toner and developer is pushed all the way in.

The blinking CH means that the Developing cartridge not installed.
Here is how to correct the issue:
1)Turn OFF the power of the machine.
2)Open the front cover.
3)Install the developer unit and toner cartridge.
4)Turn ON the power of the machine with the cover opened.
5)Enter Sim25-02. (Entered value display section: "CH" is displayed. Start LED: OFF)
6)Close the front cover. (Entered value display section: "--" is displayed. Start LED: ON)
7)Press [START] key to execute Sim25-02.When [START] key is pressed, the main motor rotates for 3 minutes to determine the toner sensor reference value and clear the developer rotation time as well as to clear the developer counter.When the operation is completed normally, the ATC sensor reference value is displayed on the entered value display section. If an error occurs, one of the following indicators is lighted. LED Misfeed indicator Paper required indicator This simulation must be executed only immediately after installing developer, Do not execute this simulation for any developer which has been used. If the machine goes into the warm-up state before completion of this simulation, there is a possibility that toner may be supplied to the developer during warm-up. In such a case, therefore, the developer must be replaced with new one.

if the door is close. you change the door swich

Corrupt or dirty toner unit chip. Remove toner cartridge, if dirty, clean chip and it's receiver on rear of machine. relocate cartridge and reset code using service code # * C * 16 press start key.

Good luck

You need to either replace the toner cartridge or empty the sump on the front of the cartridge. The waste sump is in the front of the toner cartridge, It has filled up and has nowhere else to go but out of the sump and where ever it lands. Sometimes they fill up before the toner cartridge is empty. It happens

When your copier toner cartridge sensor is blocked.then problem arise ut or bios battery is not configure program.
reset : # - interrupt - C -interrupt press 16 press start key.

CH steady means cover is open. Close either front or right cover well.
CH blinking means developer unit or toner cartridge not installed. Remove and return well and firmly.

press"clear","interupt","0","interupt",enter14 press start.should take care your problem.

CH means door is open, flashing CH means problem with toner cartridge You may need to replace the toner cartridge, the op manual can be downloaded at: http://www.sharpusa.com/files/cop_man_AR-151.pdf

The 151 is the same to the 150
Hope this helps you...

Mechanic code number