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Have you checked for the presence of the clock signals at the cpu, gluechip, mdu, rbv, oscillator output and also the E clock?

Line over means active low :)

UA15 and UB15 are the 20-pin PLCC 'SND' Chips (left and right channel) - Apple P/N 343S0045-B (Made by Sony though). It's the one actually responsible for sound output, but also functions as /RESET (or /RST) for the CPU. Pin 6 is the active low reset signals, with UB15 being responsible for...

This might be a good candidate for a reloaded Analogue board from @Kay K.M.Mods :)

Oooh, good composition!

Check the Sony SND chip for what it's doing with the /RESET line :)

Yah - UC4 is one of the 26LS30's - not vital unless you need that serial port. Have you got a spare ADB chip (UA13) or RTC Chip (UK14)? You can grab these off a dead Classic board if needed. I'd be interested to know if you replaced Q2, or measure what voltage it outputs when you apply power to...

How hot do the SCSI and SWIM chips get with power on?

How about some software release dates? Took a few days to compile this and get as accurate as I could with these! MS-DOS release dates: 1.0 - 12th August 1981 2.0 - 8th March 1983 3.0 - 14th August 1984 3.3 - 24th July 1987 (First retail release, included some FAT16 support) 4.0 - 6th November...

25 July 1961 - Sinclair Radionics founded by Clive Sinclair 19 Sep 1973 - Sinclair Instrument founded by Clive Sinclair (Later became Science of Cambridge 31st Dec 1977, Sinclair Computers 31st Dec 1980, Sinclair Research 1st Jan 1981) 5 December 1978 - Acorn Computers founded by Chris Curry &...

Hey @Mu0n Apologies for not sorting that section out sooner - had a lot of personal stuff happen the last few weeks thats mostly kept me away from TD, so i've had 0 time to deal with it. @Drake should be able to action this in my absence.

This is a job for.... @techknight ! :D

Oh, wow! Yes! Dm me and let's get this thing built!!

Ah yes, I should be more specific - the capacitors that are part of the output of the 6-phase power distribution to the CPU :)

Yes, thats the exact one - both sides hinged, so you could mount the motherboard on a swivel down tray - it was a really nice design.

After having a look at the board, this is definitely not in bad shape, it's clean, not a spot of dust and looks to have seen very little usage. However, as it's 20 years old, the caps WILL need to be replaced. The caps on the board currently are Rubycon caps which are...meh, i guess? At least...

Almost 20 years ago (jesus, that hurts to say now), I was nearly ready to begin my computing course at Middlesex University in North London. Disappointment of the course and ineptitude of the University aside, I had put together a damn good rig to handle almost everything that you could throw...

I may have a spare EGRET chip knocking around @This Does Not Compute - I gave @mitchkramez a few not long ago.

Time to sell up as much as I can - i'll be posting a few FS threads in the coming days.

Aaah yes, thats the H-Sync clamp, i made the same mistake on my initial test board: