Tek 465m

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Tripp Powell

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Aug 5, 2024, 8:26:01 AM8/5/24

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Apologies for the poor quality of pictures, as all these experiments happen at late night after work, so will be dark, I will be tired to really take good pictures, even feel lazy to get the DSLR out, rather just click on phone]

Now coming specific to the issue of trace going blank after warmup. This is random, Pressing beam finder returns it for some time, again may disappear. Suspecting bad solder joints (common problem on these models), I re soldered all possible points. Still no luck.

Follow the signal is the rule. Chase the signals from the deflection plate backwards so that you know where its failing. Or you can do the other way, follow signal from Input section and go all the way down the CRT deflection plates.

Below pic shows the position of the board in the scope, next to CRT. I did a bit of rework and used flexible wires to connect the board to the transistor, (not ideal, but I wanted a safe option). Remember this cable can affect the output capacitance and ideal option is to keep it back to the factory style of connection.

If I recall correctly, some screws/mounting posts carry ground, so do not keep the board out and try to test. Also the output of this stage goes to CRT plate, so be cautious. Delay line terminates here soldered directly to the PCB, be gentle on that too. Not a modern connector, be careful.

Exceptional service manual from TEK as always. All DC voltage levels are marked in it, for you to check, so do waveforms. Thats all for this, here is the scope, I have been using it for almost an year after the repair for hours, and no signs of any trouble.

I saw that you are in San Jose is this correct? Do you have source for new parts, particularly cases? I have a 465m that my wife stacked some stuff on top of in a closet and cracked the case breaking a chunk off and also the front cover. It was working before that but would love to get it a once over to make sure still within spec and nothing was broken inside when the case cracked. I have not powered it on but am in the process of building a garage shop and want to add it to my workbench. Thanks

The Greater London Authority commissioned the Centre for Economic and Social Inclusion to produce this report to inform the London Enterprise Panel and future [European Social Fund] ESF commissioners. The overall aim is to examine performance across the 2007-2013 ESF programme to understand how outcomes can be increased for the new programme. London was allocated 410m of ESF funding for the 2007-13 programme, and has been allocated 465m for the next ESF 2014-2020 funding period. This report brings together regional evidence of ESF priority one (extending employment opportunities) funded provision to make recommendations on steps that could make future ESF programmes more effective. Research for this report included: interviews with staff from the co-financing organisations (Greater London Authority, Department for Work and Pensions, Skills Funding Agency, National Offender Management Service, and London Councils); interviews and a focus group with providers of services commissioned in ESF 2007-13 in London; compilation and analysis of unit cost and performance data; review of relevant literature; and a workshop to test emerging recommendations.