MikeS
Senior Member

Pshaw! A good power screwdriver and a couple of containers for the screws and parts and it's a relaxing way to spend an evening while listening to a...

Those keyboards are prone to broken traces from heavy objects being placed on them; I've repaired three of them. I'd trace out that line on the...

The troubleshooting guide referenced above is pretty good; especially read the section on RAM about half way down. The RAM chips are either type...

Yeah,the power connections to the monitor come straight off the transformer terminals 9 & 11; no connection to the board at all. Is that just a...

So far all is correct. Something not right. Are you measuring AC correctly? Switch in AC position? My data may be in AC peak to peak so a...

+1 What Dave said. What is​ the voltage across the off-board C1? I assume this is the older universal board with three TO3 regulators, and that...

+1 Is that your actual machine? 1024 bytes free ? That will give a clue as to which chip is bad. What type are the RAM chips?

Welcome! Lots of Commodore expertise here. Please, put your location into your profile for future reference.

It is hard to think that both +5V regulators are bad. Something seems wrong at the inputs to the +5V regulators. C8 and C10 should be around 9V not...

Not really; Commodore keyboards generally use conductive pads, not capacitive keys. There's a relevant thread here: ...

Just picking a nit, but most drives don't care whether the diskette is hard- or soft-sectored.

Don't know if it'll help, but here's the board layout: http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/pet/univ2/8032090-7.gif I'm...

+1 What Frank said. The "power supply" is actually on the main board and you can't test it with J8 disconnected; that disconnects the transformer...

I got an email response from Dave at Tynemouth. He says It's a functional replacement, rather than an aesthetic one. I hadn't noticed that the keys...

I don't know for sure, but I think just the underside is replaced. The top of the keyboard is the kept. It's not clear from the photos. I'll ask the...

I am not familiar with the innards of the chicklet keyboard, but someone of this forum must have fixed one of these. If your keyboard cannot be...

Here are two schematics of different 8032 video boards with associated board layout: ...

Switching supplies are generally regulated; low power wall warts are usually unregulated and will supply the rated voltage when pulled down with an...

How about INPUT$ ? m

Good work!

Mark, When you get a chance, please post a few photos of the final computer restoration. Mark did a complete disassembly of the chassis...

Suitable adapters here: http://store.go4retro.com/2364-adapter/

Duh! Should have read more closely. Never noticed before: are tracks numbered starting at one instead of zero (and sectors at zero instead of one)...

Track 78 ??

:rofl:

I have one that I made when testing a friend's 4016 PET. I'll send it to you. Use private message to send me a mailing address. It will go into the...