Protek 9205 A Manual. 0 Comments PROTEK 9205A SERVICE REPAIR MANUAL contains important information and a detailed explanation about PROTEK 9205A SERVICE REPAIR MANUAL, its contents of the package, names of things and what they do, setup, and operation. Discover all the information about the product Air knife 9279 - Pro-Tek and find. Download DT9205A EXCEL MULTIMETER SCH service manual & repair info for electronics experts Service manuals, schematics, eproms for electrical technicians This site helps you to save the Earth from electronic waste!

Schematics 4 Free Service manuals, schematics, documentation, programs, electronics, hobby. (welcome to eserviceinfo.com at 10 Mar 09:50 am GMT) [news] [/news] Login: Pass: Search service manuals database Enter Mfg: Type: Show Files Order by Type: Size than Class: Search results for: MANUAL SRVICE DIGITAL MULTIMETER DT9205A (found: 82 regularSearch) File Date Descr Class Size Popular Mfg Model Original Added by Found in: fulltext index (82) DT9205A based digital multimeter schematic Multimeters 95 kB 7717 RPC mbj57 My rework of the original DT9205a diagram to fix errors and reworked to match the EXCEL version. Multimeters 191 kB 2874 Many e601kac Multimeter digital. VC-9805A Multimeters 168 kB 463 VICTOR VC-9805A andreilulu Multimeter digital. VC-9805A Multimeters 168 kB 577 VICTOR VC-9805A andreilulu Digital multimeter Multimeters 5959 kB 30 Advance plamensl HP 3478A Digital Multimeter Service Manual.

Hewlett Packard 3478A Multimeter. WinRAR self extracting archive 7 parts. Including perfect scans of the schematics. 2008 October 10.

Funny thing -- it turns out that the Protek site has a P3502C service manual! It's the same scope as the P3502 except for one added feature for component testing. I bet this manual is just what you're looking for.

Can't get a clear picture? You mean you can't focus the beam with the focus knob?

If I had to guess. There are some service adjustments for focus covered in the manual I think. Also could be a problem with the focus circuitry. Could be a tube problem. Not sure what you mean by being unable to 'get things to move around ground?'

Let me know if I can help. I am starting to get a better handle on how these things work so maybe I can steer you in the right direction. Meanwhile here is a great troubleshooting guide that applies to all scopes even tho it is written by/for Tek.

I couldn't make out the settings but that is ok. Interesting behavior!!

Take a look at that PDF and just kind of skim through it and get the gist. Their approach is--diagnose from the front panel. That's what we'll try and do. So, step one, diagnose the faulty section. The o-scope is made up of several main sections.

The power supply of course provides various voltage to all the other sections. The vertical section controls the position of the beam on the vertical axis. At present I'd put my money on a problem with the vertical section. The horizontal section is what sweeps the beam from left to right. It also is responsible for triggering when to sweep, blanking the beam when sweeping right to left to start another sweep. You seem to be having a problem getting the beam to show up below a certain point on the screen.

The vertical position adjust is part of the vertical section circuitry. So maybe that has something to do with it. In the PDF take a look at the chapter called 'Troubleshooting the Vertical Section' Let's see if we can isolate down to the block, circuit and then component levels. I am kind of winging it here. First off, does this behavior only happen on channel A? Or does this also happen on channel B?

Second, when you set Channel A coupling to AC and adjust the position knob, what happens? What about when you set coupling to DC? Third, when you set Channel B coupling to AC and adjust the position knob, what happens? What about when you set coupling to DC?

There's two obvious things common to both CHA and CHB, all coupling -- the CRT itself and the vertical amplifier (the 'Output' triangle below). This seems like an electronics problem, not a CRT problem. The other thing common to both channels is the block labeled 'Mode Control Logic / Vertical Select / Trigger Select' -- I'm not 100% sure what these do, but the problem could lie there as well.