Repair of Ersa soldering station

[on4top]

I'm repairing an ersa Eicon Soldering station .

Replaced LCD
Replaced Rotarty encoder with ALPS ( i had laying arround probably chinese clone not sure  )


Seems to work fine , only  the direction of the rotary encoder is wrong .

Removed it again en soldered some wires and switch A & B .. fixed .

So it must be a rotarty encoder with other pinouts .

https://www.youtube.com/watch?v=kjYOXSNe7Vk&feature=youtu.be

Any tips what rotary encoder is should order  ?

alps & bourns i find seem to have same pinout .


Other option is cut pcb tracks and cross the tracks with some wires ..

[KL27x]

If it works, hey ho, stop right there. Cut the tracks and be done with it.

Unless you can find the exact right encoder, you're taking a gamble. Even if the stepping is correct, the bounciness of the encoder may be totally different than the one that was spec'd.

This problem with Ersa is disheartening. I am starting to feel like every mechanical encoder is destined for failure. I think the only thing I own where this hasn't happened are my digital scopes. And that may be due to how frequently I use them.

I'm pretty sure an encoder emulator utilizing up and down buttons is in my future. So I can fix things like my Korad power supply once and for good. 3.2, 3.3, 3.4, 3.5, 3.0... 3.2, 3.3, 3.4, 3.5, 3.0... 

[on4top]

might do that .. but still  it wonders me why this is the case ..

usual you have  A C B  or   B C A .. can"t seem to find any explanation ( it fits in the pcb like a glove )

i think i order 2 different ones and test them ( alps /bourns etc )

or maybe someone who has and ersa can check  i there is any type readable ?

Orginal encoder is in the garbage and was full of silicone ( some one did a lousy job trying to fix )

[eKretz]

Where did you get the LCD? Mine could use a replacement after something got smacked into the screen. (Kids, grrr).

[P90]

I'm repairing an ersa Eicon Soldering station .

Replaced LCD
Replaced Rotarty encoder with ALPS ( i had laying arround probably chinese clone not sure  )


Seems to work fine , only  the direction of the rotary encoder is wrong .

Removed it again en soldered some wires and switch A & B .. fixed .

So it must be a rotarty encoder with other pinouts .

https://www.youtube.com/watch?v=kjYOXSNe7Vk&feature=youtu.be

Any tips what rotary encoder is should order  ?

alps & bourns i find seem to have same pinout .


Other option is cut pcb tracks and cross the tracks with some wires ..

if you can't find the proper switch, don't cut the tracks, instead cut the pins flush on the switch, and solder the wires to the correct  pads. solder two heavy wires to the sides of the switch and into to support pads. this way you can replace it with the proper switch if you later find one,

[HighVoltage]

Did you get an original Ersa display?
What was wrong with the display?

[wraper]

Where did you get the LCD? Mine could use a replacement after something got smacked into the screen. (Kids, grrr).

It's an off the shelve 128x64 LCD, there is no issue to buy original or compatible display.

[on4top]

The display is a real pain to get ..

Ersa doesn't sell it .. you have to buy a new PCB .. 150 euro ..

I also could not find any drop in replacement in China ( ali  / ebay )
I could find some  Chip on Glas displays  128 x 64  but  other connections .
Did not want to fidle with lcd connector on the Ersa pcb ..to maybe "make" it work .

After some googling the only one i could find was this one  http://www.orientlcd.com/ProductDetails.asp?ProductCode=AMG12864PR-G-B12WTDW

Price is ok until you checkout .. 100$ shipping to Belgium ! ( mailed that company .. they did not could offer a cheaper solution to send me )
 I have send it to a friend who lives in USA for 8$  and he send it me to Belgium via USPS ( 13,50$ )
So total cost is   13,50 + 8 + 13,50 =   35$ ... still enough but it fits like a glove as you can see ..

Btw good tip about the rotary enoder .. more elegant solution might do that ( cut pins of encoder itsel en solder 2 small wires to the pcb )

[HighVoltage]

Nice find on the display.
I have spent the 150 euro before at Ersa for a PCB replacement to get a new display.

[watchmaker]

FWIW, Digi-Key has these displays for $19; drop fit.

https://www.digikey.com/en/products/detail/orient-display/AMG12864PR-G-B12WTDW/11698186