Welcome, Guest. Please login or register.

Author Topic: A1200 accelerators - all have timing issues??  (Read 4516 times)

Description:

0 Members and 1 Guest are viewing this topic.

Offline som99

  • Lifetime Member
  • Hero Member
  • *****
  • Join Date: Sep 2005
  • Posts: 1566
    • Show all replies
    • http://www.som99.se
Re: A1200 accelerators - all have timing issues??
« on: June 01, 2014, 09:22:16 AM »
Check the first link from Lurch, many 2B boards are fine after just removing E123C and E125C so you can start of trying that before you continue.
Have you ever removed SMD resistors and such before? They are not only soldered but has a tiny dab of glue underneath, takes it slow and you should be fine, don't use to much heat when removing the SMD's tho :)
 

Offline som99

  • Lifetime Member
  • Hero Member
  • *****
  • Join Date: Sep 2005
  • Posts: 1566
    • Show all replies
    • http://www.som99.se
Re: A1200 accelerators - all have timing issues??
« Reply #1 on: June 01, 2014, 11:15:19 AM »
Not a myth at all, I could not get my Amiga stable at all with the ACA1231/42Mhz, I got a lot of weird crashes/gurus within secons/minutes in a lot of programs/games and also WB crashes, after performing the timing fix on my 2B motherboard all issues dissapeared and everything have been working perfect since :)

You can read a bit about it on the link Lurch posted to get a better understanding why it's needed http://www.ianstedman.co.uk/Amiga/amiga_hacks/A1200_Mobo_fix/a1200_mobo_fix.html

There are more technical information to find if you search around a bit.


Quote from: Pinballer;765454
No I never have removed a SMD component.  Do I just heat either end with a small iron tip and use solderwick, then pry the component off the board gently?

There are a few different techniques to do so, all depends on what equipment you got, just google "remove SMD resistors" end see what feels doable for you, I myself use a SMD puller and a soldering iron and heat/pull/heat/pull and done, ive also done with a "tin sucker" (dont know the english name for it) and also tried with a desolder/heatgun. But to be safe don't use to high temerature when desoldering one.

But im planning on buying an SMD Rework Station to make life easier :)
« Last Edit: June 01, 2014, 11:33:00 AM by som99 »