Woo hoo - Collection Completed!! TRS-80 inbound

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rubber_jonnie
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Re: Woo hoo - Collection Completed!! TRS-80 inbound

Post by rubber_jonnie »

And it's just arrived :)

PXL_20220825_150536366.jpg
PXL_20220825_150536366.jpg (197.87 KiB) Viewed 2008 times

Need to see if the PSU is doing its thang, yep it is, lets see where power etc is going, because I have no power LED ATM.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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stephen_usher
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Re: Woo hoo - Collection Completed!! TRS-80 inbound

Post by stephen_usher »

yay!
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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Re: Woo hoo - Collection Completed!! TRS-80 inbound

Post by rubber_jonnie »

stephen_usher wrote: Thu Aug 25, 2022 4:40 pmyay!
Not so fast!!

PSU has the correct ish voltages but testing several 74LS chips there is no power, so some TLS required.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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stephen_usher
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Re: Woo hoo - Collection Completed!! TRS-80 inbound

Post by stephen_usher »

No shorts on the +5V rail?
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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rubber_jonnie
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Re: Woo hoo - Collection Completed!! TRS-80 inbound

Post by rubber_jonnie »

stephen_usher wrote: Thu Aug 25, 2022 6:19 pm No shorts on the +5V rail?
I've not tested yet, but there are a lot of ceramic caps and a few tantalums that look really sorry for themselves, so it's a definite possibility.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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Re: Woo hoo - Collection Completed!! TRS-80 inbound

Post by stephen_usher »

I wonder if this https://www.classic-computers.org.nz/bl ... L1-fix.htm will help….
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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Tomswork
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Re: Woo hoo - Collection Completed!! TRS-80 inbound

Post by Tomswork »

The voltage regulator is a old school diode for on voltage and a ic and maybe a 7912 or something like that also people often plug the power cord into the video or cassette port and cause damage


Tom
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rubber_jonnie
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Re: Woo hoo - Collection Completed!! TRS-80 inbound

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stephen_usher wrote: Thu Aug 25, 2022 11:05 pm I wonder if this https://www.classic-computers.org.nz/bl ... L1-fix.htm will help….
That's fantastic, thank you. I had downloaded the service manual which says a lot of it, but the website is considerably clearer :)
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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rubber_jonnie
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Re: Woo hoo - Collection Completed!! TRS-80 inbound

Post by rubber_jonnie »

Tomswork wrote: Fri Aug 26, 2022 2:47 am The voltage regulator is a old school diode for on voltage and a ic and maybe a 7912 or something like that also people often plug the power cord into the video or cassette port and cause damage


Tom
Yeah, it's a worry that the PSU has been plugged into the wrong spot, not sure whose bright idea it was to make all the sockets the same pinout!
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
Top
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Icky
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Re: Woo hoo - Collection Completed!! TRS-80 inbound

Post by Icky »

rubber_jonnie wrote: Fri Aug 26, 2022 9:56 am Yeah, it's a worry that the PSU has been plugged into the wrong spot, not sure whose bright idea it was to make all the sockets the same pinout!
Thats just asking for trouble.
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