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I have 16VAC coming from the transformer, after BD901 I'm measuring + and - 14VDC, thats really strange shouldn't the votage after rectification go up by an 1.414 ratio? I changed the Bridge Rectifier for a new one and the same happens. I measure it with the + and - legs in the air so it was not connected to the rest of the circuit. theres one strange thing with the DB901 bridgr rectifier. Any idea of what might be causing this? the only thing that I didnt had time to do today was measuring the resistors one by one because I have to lift one leg up, visually they look fine. All the other circuit boards are disconnected from the PSU board. Collector of Q903 I'm measuring -0.9v instead of -12v. Collector of Q902 I'm measuring +1.7v instead of +12v. Soldered them back on Tested all the PSU diodes, all tested well Problems: After the BD901 regulator I'm measuring +-15v instead of +-18. Replaced all the PSU Electrolytic caps with new Panasonic 105º Replaced BD901 and BD902 Bridge rectifiers Replaced IC's U901 and U902, these are MC4558 opamps Unsoldered Q901, Q902,Q903 and Q904 and verify them with my Atas DCA Pro, all the transistores measured good. ![]() Here is the PSU Schematic: I Measured all the voltages at the transformer secondary and every value is spot on. I guess I will have to try to measure the voltage rails using the 2160A schematic hoping that the schematic is similar. Also I searched quite a bit on the Web for service manual/servicing info and schematics for these models and had no luck. BK PRECISION OSCILLOSCOPE 2160 SERVICE MANUAL MANUALDoes anyone have the Service Manual for the BK Precision Model 2160? Tried to contact BK Precision, Elenco, Pintek. I would like to start by checking the PSU voltage rails but without the schematics or service manual it's a bit hard since I dont see any test points or voltages silkscreened on the PCB's. I guess that means that both the Horizontal and Vertical circuits are not working properly. The unit powers up, but there's only a fixed Dot in the middle of the screen. I guess my unit it the 2160, as I was able to get some service docs for the 2160A and the PCB's layouts and component numbering are different. There's diferent BK Precision 2160 models, theres the 2160, 2160A and the 2160C. ![]() Since 1951 B&K Precision has provided test and measurement instruments for engineering, electronic design, and education, including power supplies, oscilloscopes. So it would be great to have some of you help, if you can spare the time. Bk Precision Oscilloscope 2160 Service Manual B& K Precision Corporation. BK PRECISION OSCILLOSCOPE 2160 SERVICE MANUAL PROI work mainly in pro audio electronics and have no experience in oscilloscopes repair. Hello My oscilloscope is in desperate need of repair. Lords2015 Guest Posted: Fri 3:56 am Post subject: scope Ronnieplayer, If you still have it i will pay for it to get sent to me in FLorida.let me know Lordsoftherealm Display posts from previous: -> All times are GMT Goto page, 2 of 2 Jump to: You can post new topics in this forum You can reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum. Msts addon routes and train spotting soundtrack 2. Vtech Joined: Posts: 1264 Location: USA Posted: Tue 1:29 am Post subject.and you are responding to a 6 yr old posting. I live in Pennsylvania USA and Germany is a long long way from here. I think I still have the manual and all.īut the cost to get it to you would probably more than its worth. ![]() What kind of trouble are we talking about if I just gave it to you. Ronnieplayer Guest Posted: Mon 10:56 pm Post subject: BK Precision 2160 60 MHZ scope I bought this BK precision 2160 scope new awhile ago. Hi I'm looking for schematics and/or service manual for BK Precision 2160 scope.īK Precision 2160 Oscilloscope Goto page, 2 ->:: Author Message hhopkins Guest Posted: Mon 9:12 pm Post subject: Would you PLEASE sell a copy of the BK-2160 Oscilloscope Schematics? Thanks Earl Hopkins tomdunn Guest Posted: Sat 2:39 pm Post subject: B&K Precision 2160 scope For schematics I just contacted B&K in California and they sent them to me. BK Precision 2160 - EEVblog B&K Precision's model 2120C is a dual trace oscilloscope that offers hh performance at a low price. ![]()
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