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Yes it does. Mechanically all is fine and and the resistors itself are also good. I spend the efford to pull them out oft he tracer and measure them with the highest quality Test gear we have at work.

I have been known to replace an axial electrolytic by nipping its wires right next to its body (hence leaving its leads still soldered to the board), and soldering the replacement to the original

You are absolutely right. OTOH, it's wise to move and change as little as necessary and there's no law that forbids soldering at the component side. Just make sure that the PCB remains in as good a

Ting, I looked at your pictures of your 2247 power supply, and it appears identical in all respects to my 2246A scopes pwr supply. I recapped my power supply about a year ago after checking the power

Thanks guys - i was debating that but kept telling myself 'that's not what a seasoned pro would do! take it apart and do it right' - good to know brutal tactics are accepted as long as there's some

That seems a valid conclusion. It definitely looks like you have a situation like Malcolm's. Follow his good advice. I'd just like to add that it's a good idea to try and avoid excessive stress on the

TekScopes@...> wrote: ?For reference, I measured approx. 50 ohms across the -8V with it powered off. Mine was an open-ci

Thank you so much Raymond. I'l make sure to check those and had read about those tantalum caps going to short failure mode but didn't know where to start testing. I am getting no voltage going into

The absence of -8 V is caused more often than not by a short. You should be able to check what's going into the regulator, thereby possibly avoiding a lot of disassembly of the circuits upstream.

TekScopes@...> wrote: ?There is, but it's not free. Malcolm? [Non-text portions of this message have been removed]

So then, it looks like the 2220 does not have readout, right? Does it have any menu functions at all to communicate with it? If not, then maybe the "X" is indeed the alignment pattern for it, while on

Albert, just wanted to point out that I found a spec document describing the 155-0049-02 with an internal circuit description of the sweep control IC found here:

I just opened a 465. Running on 230 V, range set to M, as it should, 120 V (unreg) is 151 V. Note: I hope that my earlier message, where I suggested not disassembling the 'scope before checking C1569

In hindsight I think your measured voltages could be normal. The raw 55V is obtained from an exact mid tap of the raw 120V secondary. Same in the B25-up version. In the B-25-up schematic that

Thank you Albert for lending your experience; these are great insights. I had heard of the 'early vs late' but only in reference to transistor soldering vs. through-board socketing and thought it was

I never noticed before that the TM5006 has a power good signal. Does the SG5010 in question work correctly in a TM5006? I do not have the schematic for the SG5010 or TM506A but based on the SG5010

Jim how to contact you off group, would like the fuill list via email. I have a lot of them too, perhaps we can swap. Kind Regards, Jon

Thanks Albert, I get 80 volts across C1513, so it could be pushing close to 82 with ripple maybe. The line voltage selector is set correctly at 115. I don't know who wrote that on the schematic, it

As I noted earlier, the 465's CRT turned out to have a terminal fault. Since the internal construction is worth looking at, it seemed a pity to simply throw it in the bin, so I decided to chop it up

That would be quite a trick.