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A till won't open the cash draw tried different

A till Casio TE 8500F won't open the cash draw tried different till / draw combinations no joy [and yes it isn't locked!]

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It usually means the drawer wiring has been shorted out at some stage and the internal fuse (most models have a drawer fuse on the main board) has blown. Occasionally the drive transistor may have blown open also. If you want to have a go at it yourself and save some money, C-tech has a service manual here:
Once you have it, I can direct you to the relevant parts/ diagrams etc for drawer drive.

Posted on Feb 07, 2010

Testimonial: "seems a rational explanation of the fault, it would account for why it abruptly ceased performing. cheers!"

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Posted on Jan 02, 2017

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It uses a special Vanadium Pentoxide Lithium battery. It is available from Casio register dealers. If you are changing it yourself, make sure you have the power TURNED ON in reg mode while changing it. It has to have power to keep the memory while the battery is being changed or you lose the program.
For those who asked, there is a Casio TE-8000f and TE-8500f programming manual here:

Apr 02, 2014 | Casio Parts Cash Register PC Desktop

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I have an te-8500f casio cash register and it just went black but sounds like the printer is running

Has the machine been turned off for a while? When did it last have the memory battery replaced? -----------------------------------------------------
If anyone needs a Casio TE-8500f manual, C-tech collective have it here:

Aug 17, 2011 | Casio Parts Cash Register PC Desktop

1 Answer

I have just baught a second hand casio TE8500f cash register and every time i turn it on it displays init 1.flag clear 2.init2 and every button i press it then displays operator mistake

Highlight "flag clear" and press YES button. If it still does not work, you have a flat or (usually) faulty memory battery and it will need to be RAM cleared then re-programmed.
If anyone needs more informaton on the Casio TE-8000f or TE-8500f, the manuals are here:
Programming manual:
Service (repair) manual:

Feb 11, 2011 | Casio Parts Cash Register PC Desktop

1 Answer

How do you setup the casio te-8500f to count stock ?

This can be quite involved if you want to use a stock inventory system. Some models require a complete re-programming so that extra memory can be opened for stock files. Normally your dealer would set this up before you receive the machine from new. It would be best to get a dealer to set up the stock areas and memory allocation.
The machine will show you the amount of everything sold if you do a PLU report at the end of the day. This may be enough for what you need so give it a try.
If anyone needs a Casio TE-8000f or TE-8500f manual, try here

Sep 29, 2010 | Casio Parts Cash Register PC Desktop

3 Answers

I got te-8500f, while i open it, the display shows: cpu Exceptional Error! Error no. 100 error point c00d8f6 access adrs 1f7 any help? Thanks in advance.

This indicates the actual processor in the machine has failed. Unfortunately the processor is the most important part of the whole register. If it is in fact a Casio register it can be repaired, but you will need to contact them. They are open right now actually, give them a call at 1-800-706-2534


Sep 27, 2010 | Casio Parts Cash Register PC Desktop

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Casio TE 8000f i have accidently deleted my Sign on button, and now i cant sign is as manager or programmer, is there a way around this?

If you flag clear it (no loss of data) then most models will give you a temporary clerk in order to program with. While you are in program mode, set a clerk button before you return to REG mode. Consult your manual for flag clear instructions as this model works differently for flag clearing. If you need a manual, c-tech collective has one here:

Sep 03, 2010 | Casio Parts Cash Register PC Desktop

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TE-8500F exceptional error!

Wow. I haven't had that one before, and I thought I'd seen them all. Has this machine been unplugged for a while, or is it in use every day?

Mar 07, 2010 | Casio Parts Cash Register PC Desktop

1 Answer

Casio TE-8500F won't start

On some cash machines there is a fuse that can burn out. Normally this fuse is located underneath where the cord go in.

Most cash machines when nothing happens means it is dead.

Mar 16, 2009 | Casio Parts Cash Register PC Desktop

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