Posts by cray_guy
81 total posts60 results
Beomaster 4000 - wicked pop when turning on
in BeoMaster · Jun 4, 2022 12:08I have a Beomaster 4000 that I recapped about 3 years ago and put it away in a box. I got it out recently and hooked it up to a pair of speakers to try it out and noticed I got a pretty serious pop when I turn it on. Tur…
Beomaster 5000 failed amplifier section
in General Discussion & Questions · Jan 2, 2022 16:45Thanks for the offer Sonavor. I decided to repair the pre-amp board with the working IC5 and I managed to get a fully functional Beomaster 5000. Sounded great. Played it for a few hours. Was happy to be done with it. But…
Beomaster 5000 failed amplifier section
in General Discussion & Questions · Dec 29, 2021 18:44I think I've finally figured out why I can't get the "Mute" function to work. I tried a different pre-amp board (which has other problems due to a dose of DC current) and it worked with the mute logic. So the problem I w…
Beomaster 5000 failed amplifier section
in General Discussion & Questions · Dec 22, 2021 20:36Looking at this a bit more, if I press and hold the "mute" function, a series of digital pulses can be observed on pin 24 and they shut the unit off, which is the way the thing is supposed to behave. So is it IC1 that ha…
Beomaster 5000 failed amplifier section
in General Discussion & Questions · Dec 19, 2021 07:41pin 24 seems to be doing its thing. Open works, select works and so does FM Mono. Only the mute function fails. Also took a look at P26 and it looks good. Also, i was doing all my measurements from the back side of P26 w…
Beomaster 5000 failed amplifier section
in General Discussion & Questions · Dec 17, 2021 23:46Thanks for the tip Sonavor. Looking at PCB3 and the base of TR2, i read no voltage and I see no effect when pressing the mute button on either the front panel or MCP remote. It does jump to ~3.5V or so when the unit is t…
Beomaster 5000 failed amplifier section
in General Discussion & Questions · Dec 16, 2021 14:57Both relays are new replacements I bought from Dillan. The mute relay does fire when I plug in the headphones. It is just not responding to the toggle relay command from the front panel or from the MCP. I'm looking for a…
Beomaster 5000 failed amplifier section
in General Discussion & Questions · Dec 15, 2021 07:16Well a few evenings finally paid off and I have a working Beomaster 5000. There were several problems, many of which I assume are common with these. I had two places on the board where previous excitement had burned trac…
Beomaster 5000 failed amplifier section
in General Discussion & Questions · Nov 30, 2021 19:51Appreciate the advice and I appreciate the challenge. As has been pointed out, the boards are fragile and the traces lift and I had a few places I had to repair to get things to the state they are in. But now I have two …
Beomaster 5000 failed amplifier section
in General Discussion & Questions · Nov 26, 2021 06:10Yes, I did adjust the idle trimmers when I started out. And more recently, I replaced them both because they were original. The fact that the right channel BDV65B just exploded last time I had it all put together has me …
Beomaster 5000 failed amplifier section
in General Discussion & Questions · Nov 24, 2021 06:10I have been struggling trying to get one working Beomaster 5000 working out of 3 non-working receivers. Two of them had failures in the PC board in the same trace leaving the rectifier. Must have been a design flaw in th…
Beomaster 5000 - do they all fail in the same way?
in General Discussion & Questions · Oct 19, 2021 07:50The darlington pair is BDV64B and BDV65B. Mouser has a BDV64BG which I assume works, but they are out of stock until way into 2022...
Beomaster 5000 - do they all fail in the same way?
in General Discussion & Questions · Oct 19, 2021 07:26I am trying to repair a Beomaster 5000 that had some failures on the amplifier board. I have two others that I bought for parts. I started looking at the darlington transistors and I found that they were all bad. When I …
Debugging fried Beogram 4002
in General Discussion & Questions · Sept 30, 2021 18:44I managed to brick my Beogram 4002 (probably by mis-aligning the stupid plugs when putting in the main board). I want to go through the debugging process that is outlined in the service manual. The first voltages I teste…
Beogram 4002 Solonoid
in BeoGram · Sept 30, 2021 17:33Hi Cliff- Looking through my box-o-parts, I found my first attempt at winding this solenoid coil. It measures 7.5 Ohms and it may work fine. I think I re-wound a second one that got closer to 9 Ohms and that was the one …
Beogram 4002 Solonoid
in BeoGram · Sept 28, 2021 16:52Hi Cliff- It is hard for me to remember, but i think the copper sleeve can be pushed out in one direction. One side is flanged way more than the other so I would try to work it out the easier way. If you want to try to r…
Beogram 4002 won't turn off and turns itself on - Ghost inside!
in General Discussion & Questions · Sept 27, 2021 03:54Hi Sonavor, That is okay. I managed to completely screw up my turntable by mis-connecting some of the plugs when I put the board back. now it is totally dead. The service manual has a flow chart to follow for debugging, …
Beogram 4002 won't turn off and turns itself on - Ghost inside!
in General Discussion & Questions · Sept 24, 2021 20:06Thanks Sonavor. I have found a Beogram 4002 Type 5513 service manual, but unfortunately it does not include the picture of the PC board itself with the location of these components (and testpoints). And sadly, it is almo…
Beogram 4002 won't turn off and turns itself on - Ghost inside!
in General Discussion & Questions · Sept 23, 2021 23:20Well after a couple of hours of playing, i was able to duplicate this. After the record finished, the tonearm returned, but the motor (and 33 RPM light) are still running. If I unplug it and plug it in again it in it sta…
Beogram 4002 won't turn off and turns itself on - Ghost inside!
in General Discussion & Questions · Sept 23, 2021 19:43I recently sold what I thought was a perfectly running Beogram 4002 to someone and they sent it back because of some mysterious behavior. 1. Sometimes, when turning off, the carriage would move all the way to the right (…