Posts by chti59 (archived2)
178 total posts145 results
Bang Olufsen Century not turning on
in Imported Content (Unmapped) · Feb 20, 2022 20:52I just tested with a lm3578 no luck but now I have 1.06V at R37 Before it was .23 Found it on an old b&o board, not from a century. It would be odd if on this board it was the same problem.
Bang Olufsen Century not turning on
in Imported Content (Unmapped) · Feb 20, 2022 20:08Hi Marcus Thank you for clarifying all this. I re-checked all components I do have 16 volts at C42. I do have 16 volts ar IC3 between pin 4 and 8. But I do not have voltage ⚡ at R37. So I need to change the IC3 LM3578 if…
Bang Olufsen Century not turning on
in Imported Content (Unmapped) · Feb 18, 2022 20:25Ok just tested d20 location D4 No voltage and on the working century we get almost 5V IC1 11 is supposed to delivers these 5V but it looks like IC1at E3 is not getting power niether. I am still lost, who in hell is givin…
Bang Olufsen Century not turning on
in Imported Content (Unmapped) · Feb 18, 2022 10:09Hi I have also switched transformer from a working century and same no power. I do not have 5v on diode D5 and tracing back I have no ac 14v power coming out on P13-7 and P13-8 and ground ok on p13-4 Will switch transfor…
Bang Olufsen Century not turning on
in Imported Content (Unmapped) · Feb 17, 2022 18:43Hi Thank you for all these details and as I do not have a paper version of the schematics I missed totally the microcontroller. All 5v from T1 are ok Then I exchange the transfo with knowing good and no change. Then I ex…
Bang Olufsen Century not turning on
in Imported Content (Unmapped) · Feb 12, 2022 10:16Hi I have a problem on a century and I am no good in Power supply repair. Relay is not turning on. Tested all fuses OK Page 2-23 on service manual If I understand the relay 5v are supplied by : P9-5 and P9-4 P9-5 then go…
Beovision 5 not starting - Panasonic Panel 2 red led blinks
in Imported Content (Unmapped) · Jun 23, 2021 17:45Hi everyone My Beovision 5 plasma TV gave up yesterday. The Panasonic Panel reference is à TH-42PW5. After searching for around 2 hours, finally traced that the SC Board was faulty, but why? It was just 2 cownnectors wit…
Beolab 4000 red led no Green led
in Imported Content (Unmapped) · Jun 16, 2021 09:06Hi Just checked and the other speaker tweeter is also dead, so certainly to much volume. Which glue are you guys unsing to reglue the dome of the tweter.?
Beolab 4000 red led no Green led
in Imported Content (Unmapped) · Jun 15, 2021 13:30Hi Manfy I do not have a replacement, this night I pulled out the treble and open it, the 2 wires were not connected to their little pole, how can that happen I do not know. I have Tried to solder the wire back on their …
Beolab 4000 red led no Green led
in Imported Content (Unmapped) · Jun 14, 2021 20:57OUPS... Talked a little too fast, the top speaker is not working but I should managed... The tweeter is dead. When you change tweter or boomer there is a procedure in the service manual to adjust like the number on the b…
Beolab 4000 red led no Green led
in Imported Content (Unmapped) · Jun 14, 2021 19:05Hi everyone. I had already replaced R96 but taking voltage again found 29 volts but nothing on the other side. Could it be that a wrong value ont the parts around it that had the wrong value could have blow the resistor …
Beolab 4000 red led no Green led
in Imported Content (Unmapped) · Jun 13, 2021 18:58Hi Beobuddy Thank you, it all has been cleaned and traces were repaired under a microscope and tested (my eyes are too old to work without it, and as I also repair cellular phones it is not possible to solder without a m…
Beolab 4000 red led no Green led
in Imported Content (Unmapped) · Jun 13, 2021 02:04Hi Testing R120 showed me a problem the resistance showed E22 and that is a 7.5 MΩ resistor so I replaced with the correct value. One thing is shure it is that the guy that fooled around before me did a big mess and it i…
Beolab 4000 red led no Green led
in Imported Content (Unmapped) · Jun 11, 2021 15:09Ok found a reply most of my questions. Now : R139 has 29V send to TR122 TR122 : I Have 29V volts on the collector but then ?????? I have changed twice the TR122 to be shure but only 29V on the collector Tested R95 R96 R9…
Beolab 4000 red led no Green led
in Imported Content (Unmapped) · Jun 10, 2021 18:52Hi everyone I am back on these speaker and I am exchanging components from one board to another to fix the one not working.I know it's a long time that they lay around, but life sometimes..... When I check R126 on the se…
Beosound4 - standby only after power cut
in General Discussion & Questions · Dec 4, 2020 13:18Hi I have the exact same problem do you know which circuit board was replaced ?
Beosound 4 stand by mode only
in Imported Content (Unmapped) · Nov 30, 2020 00:57Hi Longtime I did not work on an bang and olufsen product. Hi am more on smartphone repair because of easy access to diagrams and parts. Because of the covid-19 confinement I said why not trying to fix the beosound 4, I …
What Are You Working On Now
in Imported Content (Unmapped) · Dec 7, 2019 15:02Hi everyone I have a couple of these LC's laying around in a box and will give a try I post here because I see them on the bay and they look like the correct size... https://www.ebay.fr/itm/Lithium-Battery-CR2430-VARTA-C…