Ryobi 3302ha E12

Please can someone help what error 12 is on ryobi 3302ha thanks.

 

Hi sir;

Normally, you must test the 1( battery and see if the Red LED is LIT up you must repace ASAP, with the same characteristic

2) the CPU , where is located the CPU, or Up microprocessor in the POT vr1, try t adjust to 4.8Vdc, of course previously you must measure the 1) VCC from the CPU or UP 2) Clock, look in the Google, Bing, Yahoo ,etc the pins schematic for CPU or UP that you machine has

3) Clean very weel the edge connector of electronic board, and look, for loose wires, dirty, corroded, flat or ribbon cable loose of faulty.

4) the Reset will NOT effect, if you do NOT measure the Vcc+Clock in MHZ., the power supply must be in tolerance from 0.7% up or down, otherwise , you must repair or replace it.

 

Thanks sir, I will try to do that.

 

Ok Sir

Let me know

Blessing

 

Thanks for your concern, I don't know how to adjust to 4.8dvc or where it was located but right now the E12 have reduced to E11 and sometimes it we write E5, so am confused please help.

 

in the same power supply there are un Pot (potentiometer).

However if you are NOT skilled with the electrical/electronic issue, please look for some tech electrical/electronic, and get ready his schematic in order to locate easy the POT.

 

Am just getting confused about this panel, I call tech electronic and he Can't find the fault, and he said I need to change this panel and I don't know how to get it,please help.

 

Dear Adekunle Smart,

How the card was qualified as faulty, what tests were performed?
What is the meaning of the E12, E11, E5?

As to the Vcc. It must be not only in range of DC voltage, but be also clean of any significant AC (50/100Hz or SMPS(kHz)) noise.

Regards,
Oleg T.
Alonex ICEE Labs

 

Thanks sir.

 

Hi sir;

Maybe his tech , is NOT skill in electronic., you must look, for some electronic tech or Eng, please, you do NOT have to exchange the board, ONLY if the test are Wrong or failure !!!

However i did explicit instruction, how to test here again;

Normally, you must test the 1( battery and see if the Red LED is LIT up you must repace ASAP, with the same characteristic

2) the CPU , where is located the CPU, or Up microprocessor in the POT vr1, try t adjust to 4.8Vdc, of course previously you must measure the 1) VCC from the CPU or UP 2) Clock, look in the Google, Bing, Yahoo ,etc the pins schematic for CPU or UP that you machine has

3) Clean very weel the edge connector of electronic board, and look, for loose wires, dirty, corroded, flat or ribbon cable loose of faulty.

4) the Reset will NOT effect, if you do NOT measure the Vcc+Clock in MHZ., the power supply must be in tolerance from 0.7% up or down, otherwise , you must repair or replace it.

 

Dear Friends,

The board is near unrepairable and near unverifiable even for a very experienced electronic engineer, since names of all its IC's have been erased by mouses of the manufacturer/dealer. The IC12(near EPROM) looks as its 8-bit CPU/uCU(Japan). Power-On-Reset circuit is only a small part of any CPU system, and this one may differ of such circuit in 8085/Z80 CPU (as always referred by CHOCK), at least by polarity, and by pin number in addition. Only activity of Address/Data buses can be evaluated by a scope less or more easy, since the EPROM pins are well known.

But again, a nature of the fault(E12, E11, E5) should be understood first. If that is so impossible, and the board is so unavailable even for testing, Power Supply Unit(s), sensors and executives, and near ALL should be checked in the machine, assuming/hoping that the CPU card is working properly.

Regards,
Oleg T.
Alonex ICEE Labs

 

A forgot the attachment for Reset CPU or Microprocessor

The example in the 8085, is valid for any CPU , you must look what kind of Cpu Do you have, and search in Google, Bing, Yahoo,etc, for Pins Schematic for Cpu or Umicroprocessor.

 

Dear CHOCK,

You are mistaken. There are many MPU/uCU's with an active high pulse required to be applied on its reset input, and not a low pulse as in 8085 MPU. For example its native brother, the 8088 processor requires a positive reset pulse. And in our case, the processor part number is unknown at all, and no search engine will aid us. It may be just a deep reverse engineering research could recover what MPU is actually used on this system.

Also, if the error codes is generated by this MPU board, I would expect the MPU works in general and its reset is proper.

One more time. The error messages(E12, E11, E5) should be interpreted properly first, and PSU, sensors/inputs, executives/outputs should be checked if the MPU board is unavailable. Repair of this board is going to be very difficult and expansive because of the erased IC names, and will be not limited by its reset circuit. Basically, a simple logic assist us to discover and resolve problems, but not only repetitive monotonous praying around a machine/unit/board.

Regards,
Oleg T.
Alonex ICEE Labs

 

I believe, you have the right To be wrong.

Shalom

 

Dear CHOCK,

No, we do not have such constitutional nor biblical right to be wrong, even if we are mistaken sometimes, both in engineering and in the life. You can see the attached datasheet of a 8088 MPU, your canonical reset circuit will not work with.

Regards,
Oleg T.
Alonex ICEE Labs

 

Blessing