Above photos See the missing back panel - this is the 2ea battery packs and charger hookup areas that are missing. But I see a few 2-pin connectors. My hunch is 1 connector is for Battery Pack A, another is for Battery pack B, and the third one is for charger. I will need to do some testing and research as this hypothesis may be wrong. Below Photos Some photos of this very same model (not my unit) showing the case (I do not have a case or test leads or manual or charger) Very helpful to see what the charger connector looks like. My unit has no back panel and no charger connector. I wonder if a helpful reader can send photos of his/her unit with back panel off so I can see where the connectors and battery connect to? Consolidated Electronics Inc Semiconductor Tester model PST-5000 (also written as PST5000 or Semi Conductor Analyzer. Also sometimes the company was written Consolidated Electric and their website was Con-elec dot com and I see it is down as of recently and their 800 phone number doesnt work and says "disconnected or no longer in service" as of 8/14) I have recently purchased this tester in fixer upper condition (disassembled and missing parts) I am missing the back panel and 2ea battery packs (10ea AA Nicad batteries in each pack - information contained in the manual) and connecting cables for the batteries and charger. I hope to either purchase a back panel and batteries or custom make this to work. I wonder if any reader has this PST-5000 tester or the sister unit PST-2000 and can show me photos of the battery pack and how it is connected? Insights appreciated. Note 10/27/14 I see that "Consolidated Electric" and "Seacor" are two namebrands fro the very same identical units. I have included a photo of a unit with Seacor on the faceplate. (847) 201-1612 between 11am and 7pm daily drviragopete@att.net Dr Virago Pete I received my PST-5000 Power Semiconductor Tester today 10/17/14 and found 2 dangling wires which by process of figuring out where those leads could possibly hook up to - just by seeing where those wires reach to - I have determined that I know where those dangling wires hook up to. This leaves only 3ea 2-pring red connectors which probably has to do with 2ea 12v battery packs and the charging of those packs. The downloaded PDF manual states 10ea AA Nicad batteries in each pack. It also mentions that the battery packs supply 12v and 24v to the tester. SO that leaves me to determine how to supply power to the circuitry. I looked for voltage regulators and I do see 1ea 5v voltage regulator. I looked up several TO-220 style components and didnt find any additional voltage regulators. So I will have to figure out which one of the three is the output - this output refers the charging circuit. The charging cicuit is not required as the tester unit is made to run exclusivel;y on its internal Nicad batteries. Those can be charged a different way - or I can use a lab style power suppl;y which I have several of those. The main thing I did is put a sticker over the window on the EPROM so that the ROM doesnt get erased on my watch. Hopefully this machine was stored in a dark place such as inside of a box. So that sticker will prevent UV light from entering. And my documenting with photos how it all came - that will help - in case something gets disconnected and I can see where it went to. Also I have found a 5V voltage regulator and connecting regulated exactly 5V to the 2 output pins would be the safest first step to take. I did notice that this unit has the very same main processor as my ICT-101 IC tester. Both use the 800 processor as it was popular during that era. I suspect this unit is 10-20 years old. I need to check out the "black box" with aluminum plate heatsink - to see what that actually is - is it possible that is the battery? I'm thinking the battery packs were towards the back along the missing back panel - but what if the battery pack IS the black box with the aluminum plate heatsink. I dont understand what I'm looking at yet. I need to study it more - I cant say I've ever seen anything like it. Very unique device. I would like very much to get it working - incircuit testing of semiconductors. Update 11/2/14 I contacted a kind big-auction-site seller who sent me photos of a PST-2000 back cover and battery. In return I sent him photo of a fuseholder and where it should attach to - as his unit had some dangling parts. The photos of the back panel and battery pack helped me figure out a few things. I saw 3 connectors and I now know that two connectors are for the battery packs. Since the 2ea connectors are the same color and same color wires I knew that the voltage for each one was identical. Also the photo showed me which connectors the 2ea battery packs connect to. I did a continuity check between each pin and the large capacitors. I knew that by having continuity - that would be the negative ground pin. I used a 6v DC 500ma wall-type ac adapter and connected the leads and the LCD display lit yellow and I heard relay click sounds. I knew that I needed more voltage and amps to make it work. I used a 12v DC 1amp wall-type power adapter and connected it to the connector and the tester powered up. The menus worked and relays clicked when changing modes. I know that the two connectors are in parallel in low power mode on the tester. In high power mode the other connector must be hooked up to a separate 12v 1amp power supply - which I still need to acquire. But for now I see that the tester at least powers up. I have not tested any semiconductors with it at this time. As time allows I will fabricate a back panel and make 2 DC jacks on the back panel. This tester will run on 2ea 12v DC 1 amp wall-type power adapters. I dont plan on making it battery powered unless I get lucky and find a original back panel somehow. Running off 2ea wall-type power adapters will be just fine. I am looking through my materials inventory to find a aluminum 1/16" sheet the rights size or a plastic sheet. I am still looking as I may have something I can cut to size to work. Update 4/7/15 I have purchased a "Seacor PST2000 Semiconductor Tester" which is the sister model to my above mentioned PST-5000. The Seacor PST-2000 came with the black plastic hard plastic suitcase, a yellow banana cable and the original manual which covers both the PST-5000 and PST-2000 models. The powersupply is missing but with the knowledge I gained from my PST-5000- I was able to figureout the ports and how each internal connection should go. I have epoxied the 3-fuse holder to the top of the relays. The factor hotglued this in lpace but it was unattached as received. The slightly corroded batteries seem to hold a partial charge - insufficient to power it up - but I see that the charging circuit works. I used a 12V DC power adapter to test this PST2000 and it lights up and clicks relays and says SEACOR on the display. Each button pulls up a different test. Since I only had 1 12V DC source going in - the high voltage test is not applicable as it needs the "second 12v battery" of which Im using just a single power adapter - for now to test. It functiuons the same as my PST 5000 and looks like theres nothing wrong with it - just needs the battery pack rebuild - corroded old AA nicad cells. I purchased this PST-2000 from a seller who listed this on big-auction-site for a good 6 months - starting with a high price and slowly dropping. I made a much smaller reasonable offer and he accepted it. As I look through the internet I see an identical PST-2000 which was purchased for $31 back in Oct 2014. It looks to be the same unit as it is dissambled and cracked in the same manner and comes with the same accesories. I strongly believe that it is the same unit that I now own. It was bought and sold twice in 6months. Im glad to have it. I now have a battery pack and will be able to look off of it and make a reproduction for use with my PST-5000. Thats the main reason I bought it - to see the power pack. The PST-2000 has just a couple of 2ea less banana plugs than the PST-5000 (but the function is still there - just use the 2ea High Voltage + - jacks for that test on PST-2000 as compared to using its own jacks on the PST-5000 - no functional difference at all between units). Its practically the same unit - just a little shorter and 2 less banana jacks on the face - The only diffence that I can see is PST-2000 has a max voltage of 2000V while PST-5000 has a max voltage of 5000V (I dont test 2000V or 5000V capacitors on anything anyways). The power-input plug is the dual pin connector on the leftside of PCB (when facing the rear of unit) This is used to charge the batteries. Nothing special about the battery wiring. No internal circuit board for the battery pack. The aluminum battery holder plate is riveted on- I will drill those out and just put 4ea tiny nut and 4ea bolts - that way the battery packs can be replaced and put back exactly how it was. These units were probably made for diagnostics of VERY high power machines like mills, lathes, industrial welders etc repair. But I just repair everyday devices 110V -240V I have never come across anything that uses 5000V but the tester also tests low voltage devices in circuit - thats what I need it for. Most semiconductors I check are under 16v - you know small power - everyday electronic components. The main observation about this unit is it has a very similar "feel" to the big-auction-site caseless semiconductor testers which sell for between $20-50 there (as I write this in 2015). It is very simlar in that it identifies transistors as NPN, PNP, and pinouts EBC, CBE breakdown voltage, forward voltage etc plus many more things such as a voltmeter and current and capacitor analyzer up to 2000V or 5000V. THe BEST feature about this is IN-Circuit testing of components. Its basically like a big-auction-site cheap semiconductor tester - in many ways - but 100X better with more features and even tests components with or without having to desolder them. Very handy for those big components like transistors at rear of power supplies and triacs and SCRs and more. TV components, industrial machines and other power hungry devices are what this is made for - it can test beefy industrial components too like big mosfets, and big diodes and SCRs using actual rated voltage of hundreds or thousands of volts at the top end. At the low end it also tests the low power consumer devices type components.