#5: Fix the audio balancing issues associated with the factory ZX Spectrum 128k+. #4: Fix the video output issues associated with the factory ZX Spectrum 128k+. #3: Replace power connector and tape connectors.
#2: Replace 7805 voltage regulator with an uprated version. Initial testing – computer boots normally, with noticeable “jailbars” on RGB video.Īs the machine seemed to be working okay, I planned out the servicing, preventative maintenance, and upgrades that I wanted to perform, as follows: The computer was in very good condition, and appeared to completely original.Īfter checking that the output voltage on the PSU was as expected, a quick power-on test plugged into the RGB port revealed that the computer seemed to boot up fine.
#Sinclair zx spectrum heat leader upgrade#
The ZX Spectrum 128k+ was the last Spectrum produced by Sinclair before their takeover by Amstrad, and was affectionately known as the “toastrack” due to the large voltage regulator heatsink on its side – it was an upgrade to the ZX Spectrum 48k+, featuring 128KB RAM, 32KB ROM, an RGB video output, three-channel audio via a AY-3-8912 chip, MIDI compatibility, an RS-232 serial port, and an external keypad. Eventually, a machine in good, boxed, but untested condition with peripherals popped up on Facebook Marketplace – after an hours’ drive up to Newcastle, I put my bartering cap on and managed to get it for a reasonable price. I’ve owned several different Sinclair ZX Spectrum computers over the past couple of years, but I hadn’t got my hands on a 128k+ at this point, so I set about looking to get one for my collection.
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