Question about Casio DR-250HD Calculator

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Misses numbers My calculator seems to either "stick" or the keys are slow coming up. It seems to leave the last digit off of numbers, especially if it is two of the same...ie two 5's or two 0's. I do the payroll and this is very frustrating when I am adding up time cards. Any suggestions?

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First you must clean the keypad and it is printed with a clean piece of old clothes imersed in alchohol and dry it carefully and see the result if it is ok thats fine if not!!!!go to nearest service center.

Posted on Feb 29, 2008

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Posted on Jan 02, 2017

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Mar 01, 2018 | Casio Office Equipment & Supplies

1 Answer

Can I enter a figure like 56.37 without having to manually hit the . key? I have tried every place from F 6 3 2 1 0 and I can't get it to read or print as 56.37 or 21.24 or stuff like that...


Hi
As far as I am aware there is no way to enter a number which is not a whole number in decimal format, without using the decimal point key "." and this applies to every single machine I have come across in a more than 40 year career, the last 18 of which have been in Information Technology and computing.
Sorry if this is not the answer you wanted.

Jan 22, 2015 | Sharp EL-1197PIII Calculator 12-Digit...

1 Answer

How to solve screen issue?


This is a Two Way power calculator: Solar cell and a battery. The FX9750 is a graphing calculator and not in the league of the FX85 MS. It has a backup battery and 4 AAA batteries.
Anyway, there is no reset key. If there is a reset button it must be on the back.
After you replace the battery press the ON key. It might be a good idea to leave calculator exposed to sun light or a fluorescent tube.

Jan 08, 2014 | Casio FX85MS Scientific Calculator

1 Answer

Where is the compute button on this calculator when solving tvm problems


It doesn't have one. The calculator keeps track of whether you've hit a digit-entry key since you last pressed a function key. If you haven't, then the calculator computes the value and displays it. If you have hit a number-entry key, it stores the value. Thus, when the book says something like "press CPT then press PMT", you just need to press PMT.

Feb 11, 2011 | HP 10b Calculator

1 Answer

I just want to know where is the compute key on my hp calculator?


It doesn't have one. The calculator keeps track of whether you've hit a digit-entry key since you last pressed a function key. If you haven't, then the calculator computes the value and displays it. If you have hit a number-entry key, it stores the value. Thus, when the book says something like "press CPT then press PMT", you just need to press PMT.

Oct 19, 2010 | HP 10bII Calculator

1 Answer

I don't know how to use the calculator enough to figure scientific notations


Scientific notation is a number format that has the following structure (d stands for digit)
one digit decimal mark several other digits [times] 10 raised to power of exponent
d [decimal mark] dddddd...[x] 10^ (-) dd

Here are two examples the last two results. The number of digits after the decimal mark is select by the user depending on the number of significant digits in the data. The exponent can be positive or negative.
155b19e.jpg
In you case, to enter x10^ you press the [EE] key (no 10 is entered) the sign of the exponent and the value of exponent.

Aug 22, 2010 | Texas Instruments TI-89 Calculator

1 Answer

The # 4 key is seems to be messed up or sticking, when I push other keys #4 shows up behind the key I pushed, sometimes the fours keep going across the screen


Here are some diagnostics you can perform. If the tests fail then the calculator needs to be repaired.

Warning
In the keyboard test (below), make sure the keys are pressed in the right order. If the calculator fails the keyboard test then it needs repairs. (Ignore the beginning of the post and skip to the last part For Repairs )

You can reset the calculator:

Turn the back of the calculator towards you. Extract the top left rubber pad on the back of the calculator and use a paper clip to press the Reset button. If that does not restore the calculator to health, you should perform the diagnostic tests.

Make the calculator perform a
Self test.
  1. Turn calculator on
  2. Press and HOLD the key [ON]
  3. Press and release the key with "E" to its right (the one before last in first row)
  4. Release the [ON] key.
It tests the RAM and ROM. You will see various patterns on screen. Afterward you should see
IROM OK,
IRAM OK,
HP48GX OK
The self test will continue repeatedly until you perform a
System Halt
  1. Press and HOLD the [ON] key
  2. Press and release the "C" key
  3. Release the [ON] key.
The empty stack should appear.

If you do not see IROM OK and IRAM OK, the calculator requires service.

If the above procedure is successful, you may want
to test the keyboard.
  1. Turn calculator on
  2. Press and HOLD the [ON] key
  3. Press and release the "D" key.
  4. Release the [ON] key
  5. Press and release the "E" key. KBD 1 should appear on the top left corner of the screen.
  6. Starting at the upper left corner of the keyboard, and moving Left to right, press every key in sequence. If you follow the sequence and the keys are functioning properly you should hear a high pitch sound at each press.
  7. If everything is OK, when you press the last key (+) the screen displays KBD 1 OK.
To exit the keyboard test proceed as described above under System Halt.

If you follow the proper sequence and a hexadecimal number appears after pressing a key, the calculator requires service.-

For repairs
You can also try this site. They do repairs on most models, except the newer ones.

Jul 26, 2010 | HP 48gx Calculator

1 Answer

The #3 key sticks and won't show on the display


Hello,
Try the following procedure (valid for the HP 48G should work for the HP48GX.) If any of the tests fails the calculator requires service
Make the calculator perform a
Self test.
  1. Turn calculator on
  2. Press and HOLD the key [ON]
  3. Press and release the key with "E" to its right (the one before last in first row)
  4. Relaese the [ON] key.
It tests the RAM and ROM. You will see various patterns on screen. Afterwards you should see
IROM OK,
IRAM OK,
HP48GX OK
The self test will continue repeatedly until you perform a
System Halt
  1. Press and HOLD the [ON] key
  2. Press and release the "C" key
  3. Release the [ON] key.
The empty stack should appear.

If you do not see IROM OK and IRAM OK, the calculator requires service.

If the above procedure is successful, you may want
to test the keyboard.
  1. Turn calculator on
  2. Press and HOLD the [ON] key
  3. Press and release the "D" key.
  4. Release the [ON] key
  5. Press and release the "E" key. KBD 1 should appear on the top left corner of the screen.
  6. Starting at the upper left corner of the keyboard, and moving Left to right, press every key in sequence. If you follow the sequence and the keys are functioning properly you should hear a hight pitch sound at each press.
  7. If everything is OK, when you press the last key (+) the screen displays KBD 1 OK.
To exit the keyboard test proceed as described above under System Halt.

If you follow the proper sequence and a hexadecimal number appears after pressing a key, the calculator requires service.
Hope it helps.

Jun 30, 2009 | HP 48gx Calculator

1 Answer

My HP 48GX with COGO Card is running slow.


Hello,
You should perform the dagnostic tests.

The following procedure valid for the 48G should work for the HP48GX.
Make the calculator perform a
Self test.
  1. Turn calculator on
  2. Press and HOLD the key [ON]
  3. Press and release the key with "E" to its right (the one before last in first row)
  4. Relaese the [ON] key.
It tests the RAM and ROM. You will see various patterns on screen. Afterwards you should see
IROM OK,
IRAM OK,
HP48GX OK
The self test will continue repeatedly until you perform a
System Halt
  1. Press and HOLD the [ON] key
  2. Press and release the "C" key
  3. Release the [ON] key.
The empty stack should appear.

If you do not see IROM OK and IRAM OK, the calculator requires service.

If the above procedure is successful, you may want
to test the keyboard.
  1. Turn calculator on
  2. Press and HOLD the [ON] key
  3. Press and release the "D" key.
  4. Release the [ON] key
  5. Press and release the "E" key. KBD 1 should appear on the top left corner of the screen.
  6. Starting at the upper left corner of the keyboard, and moving Left to right, press every key in sequence. If you follow the sequence and the keys are functioning properly you should hear a hight pitch sound at each press.
  7. If everything is OK, when you press the last key (+) the screen displays KBD 1 OK.
To exit the keyboard test proceed as described above under System Halt.

If you follow the proper sequence and a hexadecimal number appears after pressing a key, the calculator requires service.
Hope it helps.

Nov 12, 2008 | HP 48gx Calculator

1 Answer

Print Problem


Could be 2 things:
Either the 3rd digit of the number wheel is sticking or the solenoid for the 3rd digit is dirty, stuck or bad.
You can take the cover for the paper and see if the wheels are turning. Enter all 8888888888's and keep hitting +, this will make all of the wheels turn. If the 3rd digit isnt moving, then you can try to take a very small drop of light weight machine oil on a small flat tip screwdriver, and place a drop on both sides of the wheel that is sticking.
Enter all 8888888888's again, and keep hitting the + and see if it gets any better or starts to move.
If the wheel doesnt turn at all, then the solenoid might be stuck and it will be a lot harder to reach to service it.

Nov 18, 2006 | Monroe 7130 Calculator

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