help with STFM 4MB SIMM ADAPTER KIT

Upgrade your RAM from ST to Falcon.
Post Reply
palutti
Posts: 2
Joined: Fri Aug 24, 2018 11:56 am

help with STFM 4MB SIMM ADAPTER KIT

Post by palutti » Fri Aug 24, 2018 3:32 pm

Hello, I recently bought a STFM 4MB SIMM ADAPTER KIT and once mounted I have the following problem

Image

I get this lines screen

to find where the error is I will need your help

Is it correct where I have welded the positive right leg of the capacitor? in the exxos website manual it is not clearly seen in the photograph

Image

also from point D2 to point 0V I have continuity. I have tried to scratch the copper from the point where the drilled hole is, but I still have continuity.
It has something to do, that the PCB is mounted? Should I have measured the continuity with the PCB before mounting it?

Image

Image


Any help that you can provide me I will be eternally grateful

User avatar
exxos
Site Admin
Posts: 3549
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:

Re: help with STFM 4MB SIMM ADAPTER KIT

Post by exxos » Fri Aug 24, 2018 4:36 pm

Bad solder most likely.

The RAM PCB is labeled up where the pins connect to the MMU etc. Then you can check with meter they are connected. Pinouts and schematics are viewforum.php?f=31
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

palutti
Posts: 2
Joined: Fri Aug 24, 2018 11:56 am

Re: help with STFM 4MB SIMM ADAPTER KIT

Post by palutti » Fri Aug 24, 2018 6:07 pm

what about continuity between D2 and 0V, is it normal?

User avatar
exxos
Site Admin
Posts: 3549
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:

Re: help with STFM 4MB SIMM ADAPTER KIT

Post by exxos » Fri Aug 24, 2018 6:21 pm

palutti wrote:
Fri Aug 24, 2018 6:07 pm
what about continuity between D2 and 0V, is it normal?
Nothing should be 0V other than 0V itself.
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

Post Reply