Hi Everyone
Hope someone can help.
Just recapped a 128K grey +2
and everything was looking fine, working fine until I recapped the Datacorder.
Now when I turn on the machine I get random blocks and colours,BUT if I reset the machine and dont turn it off it works fine.
Madness.
Also if I unplug the datacorder from the mother board the machine turns on ok.
Any help would be much appreciated.
Thanks
128k +2 Grey Recap Question
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Ast A. Moore
- Rick Dangerous
- Posts: 2641
- Joined: Mon Nov 13, 2017 3:16 pm
Re: 128k +2 Grey Recap Question
Double check to make sure you have the capacitors on the Datacorder side installed correctly. There are really only four connections between the logic board and the Datacorder: +5V, ground, audio in, and audio out. Also, make sure there are no cold solder joints or solder splashes bridging traces.
And just to be sure, recheck the installation of C36.
And just to be sure, recheck the installation of C36.
Every man should plant a tree, build a house, and write a ZX Spectrum game.
Author of A Yankee in Iraq, a 50 fps shoot-’em-up—the first game to utilize the floating bus on the +2A/+3,
and zasm Z80 Assembler syntax highlighter.
Author of A Yankee in Iraq, a 50 fps shoot-’em-up—the first game to utilize the floating bus on the +2A/+3,
and zasm Z80 Assembler syntax highlighter.
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1024MAK
- Bugaboo
- Posts: 3118
- Joined: Wed Nov 15, 2017 2:52 pm
- Location: Sunny Somerset in the U.K. in Europe
Re: 128k +2 Grey Recap Question
If C36 is not present, is fitted the wrong way round, has poor solder connections or is faulty, then there will be no auto-reset on power on and the Z80 CPU will not be correctly reset.
Mark
Mark
Standby alert “There are four lights!”
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.