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Thanks Stan, The unit can run the 32-bit version of Windows 7 - You can also get the custom devices to install by extracting the Windows XP drivers and then dropping the correct WDFCoInstaller DLL

F4 had blown when I was getting 24v. I replaced it and q4, soldering both pins of q4 temporarily. It's possible the "one good" inseption clip was not. I'm just glad to be over that for now...

I have a quantity of not very useful HP test equipment manuals in small 3-ring binders.? I'm planning to recycle them, but I wondered if anyone could use the binders.? The page size is 7" x 8.5" and

Hi again. From the above measurements, it looks like Q4 is bad (open collector?)? But later it is said the -12.6 rail came good. Intermittent connections around Q4, as someone (forget who) mentioned

While I wait for a new socket, I went ahead and soldered the transistor in the relevant socket. The other sockets look ok. Like I say, I now have all 4 supplies running and adjusted. Starting to muse

Bill, My friend Pete brought over his 141T with plugins and it was intermittent and I found that the pass devices were not always making contact. The sockets have been thermal cycled enough that the

Thats awesome Bill!? I would not have expected those rectifier diodes either.? They are tough little guys. -Frank

Bill, Wow! Bad diodes I would not have expected that. Now you have to check the pass device and the rest of the regulator. Mike Sent: Saturday, September 14, 2024 12:19 AM To:

Bill, See that there is continuity from the negative side of C6 to the anodes of the diodes. If that is good use the diode scale on the DMM and see that you have about .7V forward on each diode. You

All 4 voltages look good now. I popped the plugins into the case. 3 lights - scanning, log ref 0 and an X. No life on the crt however. Going to take a break and Crack open the manual some more. Not

Try this again.... I've been marking this schematic for to long to keep it straight... I am looking at it though Q9 E 1.5 B 2.2 C 17 Q10 E 0 B .6 C 2.2 Q11 E 1.66 B -2.3 C 2.2 Across cr1 and cr2 is

Hi Tony, It's been quite a while since I did this, so I don't recall if the upgrade to Win7 required a 64-bit capable CPU, but ISTR that it did. I do remember having to buy a new processor board for

Also, as a sanity check, when is the last time you checked the other rails?? Is your -100V rail still in spec?? Without a temp compensated zener, these 140/180 power supplies can get unstable.?

Bill, Your measurements aren't making sense.? Also, this is being compounded by not providing enough info as to what point you are referencing when you take your measurements.? For example, Mike

Diode to chassis is how I was measuring it. I do see expected voltage at the cathode side of my makeshift rectifier. 17.5v. The 24v last night was the fuse.. here's the most recent checks. Q9 E 1.5 B

The usual problem - degraded O rings! They seem around 1mm ID 0.5mm CS (so 2mm OD) or maybe .039" ID, .024" Cross-section, which can readily be found in Butyl-rubber as watch crown gaskets, but there

Bill. For the sake of clarity, what exact points in the circuit are you measuring between? Across each diode (anode to cathode) or between one side of each diode vs Chassis Ground? If the latter, you

Re:- "That discrepancy between A2Q9.C and Q4.C is certainly a typo, or perhaps the two points were measured at different times and the mains voltage changed, and no-one noticed that they're by

Hey All, I'm just wondering if anyone may have a copy saved somewhere of this software. I'm trying to bring an old N9010A with a 32-bit x86 processor onto a later OS than Windows XP (Windows 7) but it

For S&Gs, I jumpered in a set of SB520 and that brought the -12.6v output up to ~23v! I went ahead and ordered 1N3209s. -23v is a bit concerning, but I will check the pass trans one more time and