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Code CH displaying on screen of Sharp AL-1553 Photocopier. What does error relate to. Or, how do I clear this message if this is a false error. Thanks Stephen

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Door switch is not turned on. ( The interlock switch is on). If the door is closed check the switch.

Posted on Jul 04, 2008

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When we switch it on it shows H then 4 and won't let us do anything. It's a Sharp AL 1553 PHOTOCOPIER


To reset the H4 condition on just about any Sharp AL series copier press the following key's in sequence and as quickly as possible (with 4 seconds for the first 4 keys)
Press "C" then the far left key (exposure mode) then the "C" key then the far left again.
So in other words C, far left, C, far left
Some model's use 2 other initial codes, so you may need to use one of these 2 alternate codes to get your display to go blank. The rest of the procedure is the same.
Alternate codes are: #, * , C, * or pound,star,C,star and also
#, Interupt, C, Interupt
If done correctly the display should go blank.
Now key in 14 as if you were going to make 14 copies.
Now press the print button.
The machine should reset and the code should be gone.
9 times out of 10 this is a false code that pops up due to power surges or noise.
If the code comes back this means you have a heater lamp or thermal fuse (more common) failure in the fusing area and will need service.

Jan 10, 2011 | Sharp Office Equipment & Supplies

3 Answers

H 4 code flashing


The H4 code indicates the fuser may have blown the thermistor. It also could be a false error code. Try this series to clear the error and if it returns, then you'll know for sure the fuser is the culprit. To reset press the following buttons:
  1. Press this sequence: CLR-Exposure-CLR-Exposure
  2. The display will go blank
  3. enter "14", press "PRNT"
  4. Press "CLR" several times to exit.
Give that a try and good luck.

Feb 18, 2010 | Sharp AL 1631 Copier

1 Answer

H4 showing on model AL 1553


Hello my friend.
It is a fuser temperature error or one of the sensors is dirty.
You could try removing the fuser assembly - ensure power is switched off- then try cleaning the sensors as they tend to get paper dust and melted toner which collects between the surface which senses the heat from the fuser `Hot` roller.
if this doesn't fix it you may need to replace the fuser.
There is also an engineer code that you can enter to clear the fault
PRESS: Clear - exposure - clear - exposure = the LED display will turn off.
PRESS: # of copy keys until you have 14 displayed.
PRESS: Enter.

Feb 05, 2010 | Sharp AL-1553 All-In-One Laser Printer

1 Answer

WHAT DOES THIS MESSAGE MEAN: CH


It is the fuser, but sometimes it is just a false code. to reset enter buttons clr, exposure, clr, exposure, the display will blank, enter 14, press prnt button, then clr several times to get out and thats it. -------- if still the same the fusser needs to be get checked and replaced.

Nov 03, 2009 | Sharp AL 1631 Copier

2 Answers

What is the code to reset the Sharp AL 1631 copier


Sharp - How to reset code
To enter service mode press thesekeys: orange C button,Interrupt, 0, Interrupt. The screen goes black when you have done itcorrectly. It may take a few tries – must be done in certain time.
To clear the maintenance indication (service man): press 20, start,1, start (the display will start to flash when entered correctly).Power off/on to make the copier dude go away. Good Luck!

Jan 31, 2009 | Sharp AL 1631 Copier

1 Answer

Copier not working shows a flashing L on display


Sharp AL-1553 code


E7 03 Scanner position error 04 Exposure lamp blown 05 CCD calibration error 12 White level calibration error 14 Main board malfunction 15 Exposure lamp blown L1 00 Scanner position error L3 00 Scanner position error L4 01 Main motor drive overloaded L6 10 Polygon mirror motor not up to speed H2 00 Fusing unit temperature error H3 00 Overheated fusing unit H4 00 The fusing unit doesn't heat up U2 01 Counter error 04 EPROM error CH blinking Dev unit is not properly installed

Nov 18, 2008 | Office Equipment & Supplies

1 Answer

Sharp al-1644 photocopier


Usually CH indicates that one of the doors on the copier is not closed properly, if it is a flashing CH then there is no toner cartridge in the copier or the cartridge is of the wrong type for this machine. A lot of toners for this machine look alike but are not the same for the machine.

May 26, 2008 | Office Equipment & Supplies

1 Answer

AL-1000 Sharp Photocopier


Performing a Fault Reset 14 will reset your WorkCentre and will help to clear error codes.
  1. Find the pink Clear button on the Control Panel of the WorkCentre.
  2. Find the button below the word Auto.
  3. Press these buttons in the following sequence: [Clear], [Auto], [Clear], [Auto] NOTE: All of the lights on the Control Panel should go out and the LED Display should go blank. If the lights do not go out, then repeat step 3 until they do. It may be necessary to increase or decrease the pace of the [Clear], [Auto], [Clear], [Auto] sequence.
  4. Press the [10's] key one time and the [1's] key four times to enter '14' in the LED Display, as if you were to make 14 copies.
  5. Press the green [Start] button.
  6. Press the pink [Clear] button two times.
  7. The WorkCentre should now warm up and come to ready.
  8. If the above steps do not clear the error code, repeat steps 3 to 6 a second time.
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Mar 11, 2008 | Sharp AL-1000 Laser Printer

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