Posts by Krolroger (archived2)
253 total posts217 results
Beocenter 4000 (Type 1603) Ground Loop Problem
in Imported Content (Unmapped) · Mar 26, 2021 22:55In fact, the ground loop (?) fault is not solved with electrical tape, though it helped up to a point. The problem turned out to be fractured solder on the Play Back amplifier header pins and elsewhere. Replacing all the…
Beocenter 4000 (Type 1603) Ground Loop Problem
in Imported Content (Unmapped) · Mar 2, 2021 17:08I find this is neatly solved with a strip of electrical tape. Onto the next problem (the unreliable auto-stop).
Beocenter 4000 (Type 1603) Ground Loop Problem
in Imported Content (Unmapped) · Mar 1, 2021 22:19This Beocenter really is the gift that keeps on giving. However, I've now encountered a problem to which I can see a solution, but it's a bodge. I don't know if the problem pre-existed because the tape player was non-fun…
Parts for Beocord 3300, beogram 1200, beo master 1600m
in Imported Content (Unmapped) · Feb 25, 2021 14:01Hi Malcolm, Martin/Beoparts is your best source for parts but you can use suitable dial cord which you can get on eBay. The 1600M is an updated version of the Beomaster 1400 (2104). I repaired one last year and posted th…
Beocenter 4000 (T1603): Tape Section Voltage Conundrum
in Imported Content (Unmapped) · Feb 5, 2021 13:20Martin, Thanks for pointing me back down the tracks. A quick check showed that the AC supply into the bridge rectifier was way off. A further check showed a probable path to ground through defective insulation on one of …
Beocenter 4000 (T1603): Tape Section Voltage Conundrum
in Imported Content (Unmapped) · Feb 5, 2021 11:05I should have added that the first thing I did before applying power to this unit was replace all the caps in the regulator board.
Beocenter 4000 (T1603): Tape Section Voltage Conundrum
in Imported Content (Unmapped) · Feb 4, 2021 20:35And the board with the tape function switches, VU meter and Autostop:
Beocenter 4000 (T1603): Tape Section Voltage Conundrum
in Imported Content (Unmapped) · Feb 4, 2021 20:31Good evening, I posted recently about another of these nice machines which had a different tape playback problem. My problem with this one is a loss of voltage in the tape section - which requires a supply of +/-30 VDC, …
Beocenter 4000 (T1603) Regulator Board
in Imported Content (Unmapped) · Jan 16, 2021 13:42Thanks, Martin
Beocenter 4000 (T1603) Regulator Board
in Imported Content (Unmapped) · Jan 16, 2021 12:42And what it looks like:
Beocenter 4000 (T1603) Regulator Board
in Imported Content (Unmapped) · Jan 16, 2021 12:38Can anyone tell me the reason for these horseshoe shaped solder pads? They are clearly marked on the layout diagram for the power supply board on the Beocenter 4000 (also Beomaster 2200) in the locations for IC1 and TR3 …
Beocenter 4000 (T1603) Tape Playback Problem
in Imported Content (Unmapped) · Dec 31, 2020 00:09One problem which caused a certain amount of head scratching is that sometimes the tapehead bridge only retracts to the Pause condition (semi-retracted) when Stop is invoked after Play - rather than the Stop condition (f…
Beomaster 1400 (Typ 2104)
in Imported Content (Unmapped) · Dec 30, 2020 23:23Hi Caladan, The service information is available on this site for download if you are a silver or gold member. As component values are sometimes at variance with the schematic, you might want to cross check with the actu…
Beocenter 4000 (T1603) Tape Playback Problem
in Imported Content (Unmapped) · Dec 24, 2020 18:34My relay replacement for the old National relay is in place and now provides a reliable signal path. The breakout pcb was made for me in China (5 USD for 10 plus shipping 🙂 ) and arrived at my door in the UK less than n…
Beocenter 4000 (T1603) Tape Playback Problem
in Imported Content (Unmapped) · Dec 7, 2020 14:14I will replace the 4 pole c/o relay with 2 Omron 12v relays with the coils in series. The faulty component in the signal path turns out to be the NE545B Dolby processor. The signal was going in but not emerging.
Beocenter 4000 (T1603) Tape Playback Problem
in Imported Content (Unmapped) · Dec 5, 2020 16:28I think this relay on the Dolby board is on the signal path between the playback amplifier and the Dolby processor. I removed it and find that one of the normally closed pole pairs is intermittent or high ohms. It may no…
Beocenter 4000 (T1603) Tape Playback Problem
in Imported Content (Unmapped) · Dec 4, 2020 17:14And the relevant bit of the circuit:
Beocenter 4000 (T1603) Tape Playback Problem
in Imported Content (Unmapped) · Dec 4, 2020 17:08Evening All, I dusted down this Beocenter that I recapped a few years ago with the intention of sorting out a longstanding tape playback problem. All mechanical functions appear to be in order (I fitted one of Martin's n…
BM4000 Replacement Transformer Specs
in Imported Content (Unmapped) · Nov 7, 2020 17:31Hi, From an electrical point of view, this looks pretty much identical to the toroid I installed in my Beomaster 4000 eighteen months ago, details of which you will find (or have already found) on this site. Your dimensi…
beomaster 4000 transformer hummimg
in Imported Content (Unmapped) · Jun 7, 2020 11:20Hi Justin, One of the problems with the Beomaster 3000 and 4000 sets is that in money terms, despite the wishful thinking of numerous ebay sellers, it makes no economic sense to pay somebody to fix a major problem like a…