It shows error ch - Sharp AR-M205 Copier

What if copier show L1

Same problem on an older LC-C3742U SHARP AQUOS. Other tv in my house receives ch 4.1 at the same cable spot and bad tv will not receive this ch in the good tv's spot so I know it is the tv. It receives all other channels well just not 4.1 which shows E202.... Tried your reset protocol but it merely started the tv and held the channel it was last set on.
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Ch is usually followed by another error code if there is a problem with the unit. If you have no other errors this is a reminder to clean the filter that will appear every 366 hours of use. Clean the filter and reset the code by pressing the UP and DOWN temp arrows at the same time until the diplay changes.

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CH-52 Communication error between inverter PCB and main outdoor unit PCB. Check wiring fuses and LEDs . If OK either inverter or main PCB defective

CH mean any kinds of door is open or not close properly.Please close door properly.right side or front side.it has a connector switch it is open or displace.

Ch means the side door is not closed or the toner is not installed correctly.

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.

CH - open cover in the paper feed area.OR - Sorter not installed properly
CH blinking - Dev unit is not properlyinstalled.

EE-EU - Low toner density in thedeveloper.

Check/ replace toner cart. Check/ reset Dev. unit. Check covers and doors to make sure all are closed properly. If you have sorter -- make sure sorter is seated properly.

CH means your toner cartridge is needing replaced.