Posts by Lonnie
70 total posts69 results
What are you listening to…..right now.
in BeoPeople · Jan 12, 2023 10:18This is my first post on the new Forum so hopefully it works?! Currently on holidays down at the beach house and I should be listening to some Jeff Beck (RIP) but have The Strokes The New Abnormal playing. I saw them at …
Beogram 8000/8002 USA Transformer
in Imported Content (Unmapped) · Feb 23, 2022 10:16Hi Shawn, We may have spoken a while ago but I still have a Module 4 part 8013242 Type 5633 120V 60Hz transformer which I believe is what you're after. I'm based in Australia so if you can't find one locally I'd be inter…
Beomaster 7000 Audio Output
in Imported Content (Unmapped) · Oct 1, 2021 23:35Yes that is correct, it sits on PCB 7 which is piggybacked onto PCB 3. Regards Lonnie
Noisy Beogram 2000
in General Discussion & Questions · Aug 3, 2020 10:08Hi, It looks like the platter is sitting too high. If you remove the record and gently push down on the platter does it move? It should be able to move up and down on the suspension. If the there is no movement then it i…
Beomaster 8000 restoration #3
in Imported Content (Unmapped) · Jun 7, 2019 08:24Hi ALF, Is the distortion in one channel or both? 2IC6 is a good place to start. What are the DC voltages on the chip? I had a TL072 fail on the filter board 4IC2 on a BM8000 for no apparent reason, it was distorting bad…
Beomaster8000 repair/resoration
in Imported Content (Unmapped) · May 22, 2019 07:43Hi ALF, Well done, mystery solved. I agree with you, the people on this group are a fantastic resource and I've learnt a lot from their words of wisdom. So... please don't keep us in suspense..... what is the next projec…
Beomaster8000 repair/resoration
in Imported Content (Unmapped) · May 22, 2019 03:58Hi ALF, I'd go back to basics to see where you lose the signal. Starting at the obvious, do you have the external filter links in place? Using the FM as a source do you have an AC signal at R250 on the preamp board? You …
Beomaster8000 repair/resoration
in Imported Content (Unmapped) · Mar 25, 2019 11:11Hi ALF, The replacement relay I used was: SPST, Coil: 24VDC, Switching Current: 10A@240VAC, Coil resistance: 880ohm. I found some 5A relays with a max current rating of 7A but decided to go with the 10A instead. The 5A i…
Beomaster8000 repair/resoration
in Imported Content (Unmapped) · Mar 24, 2019 06:16Hi ALF, The measurement on 7R1 should be an AC voltage measurement, can you confirm if that was the case? The anode of the diode 7D2 should always be at -23v or thereabouts. The cathode should be -23v in STANDBY and -02v…
Beomaster8000 repair/resoration
in Imported Content (Unmapped) · Mar 23, 2019 01:24Hi ALF, I agree with a previous post of John's about faulty relays, I've also had to replace RL2 on a BM8000 I recapped a couple of years ago. I'd measure the collector voltage of 6TR18 after you plug the unit in and it'…
Beogram 8000 main drive issues
in BeoGram · Jul 26, 2018 11:09Hi ALF, John is correct, you can't have voltage at the emitter of 1TR20 if the collector of 1TR21 is properly grounded. Instead of just using a link between C&E of 1TR21 why don't you try a link between C of 1TR21 and an…
Beogram 8000 main drive issues
in BeoGram · Jul 18, 2018 23:15Hi ALF, Sorry, I thought you were indicating that the LED in the arm was on all the time. Re-reading you post you clearly say servo bulb. As Dillen indicated 1TR6 is fine so no need to remove and check. Regards Lonnie
Beogram 8000 main drive issues
in BeoGram · Jul 18, 2018 12:15Hi ALF, Was the LED in the tonearm on during both measurements? Assuming it is, then 1TR6 is not being biased on properly and the only way for the LED to be on is for 1TR6 to be faulty. I'd pull it and test it. Regards L…
Beogram 8000 main drive issues
in BeoGram · Jul 18, 2018 08:58Hi ALF, John's explanation is correct, you'd have to take the switch out of circuit and re-measure it to see an open reading. You previously gave readings at P6-10 to confirm the voltage when the switch was open and when…
Beogram 8000 main drive issues
in BeoGram · Jul 18, 2018 00:30Hi ALF, I would've been very surprised if you did have a current probe. It's still an interesting measurement. I presume the light blue trace is P4-2, anyway it shows that the brake is being activated. Regards Lonnie
Beogram 8000 main drive issues
in BeoGram · Jul 17, 2018 13:04Hi ALF, The current will under go the phase change not the voltage so unless you have a current probe for your oscilloscope you won't be able to measure the phase change. Regards Lonnie
Beogram 8000 main drive issues
in BeoGram · Jul 16, 2018 08:00Hi ALF, Before you move on from the electronic switch that manages the power supply I'd verify it's working properly by manipulating it without the uC. I'd lift the base of 1TR21 from the PCB and hook up a small circuit …
Beogram 8000 main drive issues
in BeoGram · Jul 15, 2018 09:50Hi ALF, How can the emitter of 1TR21 be at -15.9V in Play mode. It is supposed to be grounded? Is there a ground problem at the emitter? Regards Lonnie
Beogram 8000 main drive issues
in BeoGram · Jul 14, 2018 12:46Hi ALF, I'm not giving up on the uC just yet. If you notice the difference in the voltage output between Standby and Play it is the same difference as mine just offset by about 4.8V. Did you put new parts in or just meas…
Beogram 8000 main drive issues
in BeoGram · Jul 14, 2018 06:51Hi ALF, You need to replace 1TR20 (PNP) and I think you should also replace 1TR21 (NPN) at the same time. Regards Lonnie