Wreck's latest activity

Thanks, Hugo, for your very valuable input. I didn't have time yet to check further, however my 22pf capacitors arrived. At the next...

Crystals do deteriorate over time and they age and it is affectionately called, losing activity. In many cases though it does not...

It is definitely helpful to have a large cupboard with plenty of spares, but probably more important to have an understanding wife...

OK So I traced the problem all the way back to the 16MHZ crystal Y1. for some reason or the other it is not producing any signal. I...

After fixing the reset circuit, havin a nice and stable platform, I thought I will hook up a cassette tape and try to load a test...

One good way to help protect the CPU socket, is to have the final item that plugs into it made from a typical dual wipe IC socket, the...

The problem with the reset circuitry is 'detritus' around the 555 of course. However, detritus elsewhere can also spell trouble for...

Hi Dave, I will clean the board again to make sure no gunk remained from previous repairs; somebody soldered new 2114 sockets in, and...

So now with C68 removed, the CBM runs fine (needs a manual reset after power on). Starting from the 555 I now have the following; A2...

I desoldered the ceramic capacitor at C68 today, to have it tested on the bench, and thought "lets see what happens if I turn the...

Hello, My trustworthy 3032 developed several hiccups over the past months. Suddenly it wouldn't start, only with the help of the PET...

I was able to trace the machine back to his original owner; a certain Boris Eelzebub, it appears. I put in the replacement 901466-02...

I was able to burn the 2732 from $C00 to $FFF, but no difference (actually it is worse now, as the drive motors won´t spin up at all)...

Thanks Dave! I will try this afternoon. I am using an old GalepIII with software running under WIN98. Joe

Just out of curiosity; in a German service manual of the CBM the first troubleshooting step is to check the multiplexers (UD3/UE3/UF3)...