Mark-sf

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  • in reply to: Beogram 5005 troubleshooting help #7462
    Mark-sf
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    I would agree with Martin but initially focus on tracking force if the diamond is still intact based upon your transporting without locking the screws.

    in reply to: Beocord 8004 #7107
    Mark-sf
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    Assuming you have tried it with multiple tapes, I would contact the seller as its obviously not in “superb condition”.

    in reply to: Beogram 4004 (Type 5526) issue #7106
    Mark-sf
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    Since you are able to play using the < key, the issue is in the << electronic switch. I have found TR12 to be bad though rarely its been TR11. Also I have found TR8 to be bad on the muting board; however, in that case it tries to start and shuts off immediately.

    in reply to: BEOGRAM 5500 Scraping Sound… Any Ideas? #7094
    Mark-sf
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    Unfortunately,  there is no industry standard for 12” record weight. They can range from 80-200g. I have never had a problem finding a suspension height that will work with all without bottoming or scrapping. In the end it’s critical that the platter also remain level.

    in reply to: BEOGRAM 5500 Scraping Sound… Any Ideas? #7081
    Mark-sf
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    The service manual provides clearance specifics so I would adjust to that with your 180g records.

    in reply to: BEOGRAM 5500 Scraping Sound… Any Ideas? #7065
    Mark-sf
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    Check the rear of the tonearm’s clearance with the record edge.

    in reply to: Beogram 4000 pop noise when lowering the arm #6985
    Mark-sf
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    I would still suspect the muting contacts. They should be cleaned and adjusted as per the service manual available at https://beomanuals.com/manuals/Beogram/Beogram%204000/Beogram_4000-Service_Manual.pdf.

    in reply to: How to adjust pickup arm Beogram 3000 #6980
    Mark-sf
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    Check out the service manual available at beomanuals.com.

    in reply to: Beogram 4004 (Type 5526) issue #6970
    Mark-sf
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    Glad to see you are making progress. Are you able to start the turntable using the < key to move the arm inward? Does it stay or want to go back and shut off?

    in reply to: Beogram 4004 (Type 5526) issue #6904
    Mark-sf
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    There are some major issues there that can only be explained by one or more errors in your parts replacement. Pressing 33 should ONLY cause the platter to rotate and not move the arm. It is a “clean record” function. ON should cause the collector of TR12 to latch high (17v). If pressing 33 is causing that then I would carefully check your diode orientations as you may have one in backwards or a shorted one. The slow return could also be your pulley alignment, lubrication or servo belt.  If it is running at the same speed as “>” then once again there may be a diode/trans issue. This is when TR13 should latch high. Finally, don’t forget to check D9/10 and TR8 on the muting board as they perform the same functions.

    in reply to: Connecting Beogram 9000 to BL 28’s #6901
    Mark-sf
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    To do a fair comparison I would still connect the 3500 directly to the 28s.

    in reply to: Beogram 4004 (Type 5526) issue #6893
    Mark-sf
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    You likely have a shorted transistor in the On portion of the electronic sw. Check TR13 if I remember correctly. There is also a companion on the muting board for the remote.

    • This reply was modified 2 weeks, 5 days ago by Mark-sf.
    in reply to: Connecting Beogram 9000 to BL 28’s #6892
    Mark-sf
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    First, which RIAA preamp are you using?  I would definitely try a direct connection to the line in of your BL28’s bypassing the Moment.

    in reply to: Beogram 8002 cleanup #6789
    Mark-sf
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    Yes that is what I meant. I do see that Martin has an 8002 Cap kit at https://www.beoparts-shop.com/product/capacitor-kit-beogram-6006-8000-8002/. I have gotten parts quickly from him in the US.

    in reply to: Beogram 8002 cleanup #6773
    Mark-sf
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    You can’t get a “set”. You need to get a cap kit that includes all the values you need. These kits are available on Amazon, DigiKey, Mouser, etc. Only do the electrolytics (the cylindrical ones) first as they are the most likely culprits. Don’t forget the 47mF on the CPU board.

    in reply to: CD 5500 running hot! left side near back #6569
    Mark-sf
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    I doubt its the motor as its on the right as is the transformer. My suggestion would be to open the unit per the manual at https://beo.zone/media/files/Bang-Olufsen-Beogram_CD-5500-Service-Manual.pdf and identify the specific component generating heat.

    in reply to: Beocenter 8500 – Speaker Out Right #1 Not Working #6137
    Mark-sf
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    No I did not check this because there is audio on the speaker pin. I would expect that an issue with the muting relay would prevent audio from passing to the speaker port. As far as I can see it is much earlier in the signal processing? When I trace the audio there is a signal on the output pin of the speaker port. This signal dissapears when I attach a load (speaker) to the port. I can’t see any damage on the port, there are no shorts on the pins. Voltage of 4.5v on the pin for the dataline seems correct.

    By your earlier statement the Rt Spkr Jack (P91) works so there is no other likely failure than the relay. Anything eariler shares the audio path with P91. Datalink is not involved in the audio path.

    • This reply was modified 1 month, 2 weeks ago by Mark-sf.
    in reply to: Loud noise when turning on Beocenter 2002 #6034
    Mark-sf
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    I’m not sure what that circuit board’s function is as it’s markings and wiring could indicate that it is on the power amp outputs. You definitely have a defective left channel if it is reading 24v. That is also the channel associated with the R101 that you replaced. Fix the left channel first and you may find that the right channel no longer makes noise.

    in reply to: Beogram 5500 turn table #6031
    Mark-sf
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    The transport screws are not used to adjust the leveling and do not come out so they are not likely stripped. The screws to level are under the platter. Take a look at the service manual at https://beomanuals.com/manuals/Beogram/Beogram%205500/Beogram_5500-Service_Manual-version2.pdf for instructions.

    in reply to: Loud noise when turning on Beocenter 2002 #6012
    Mark-sf
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    Are you certain it was R201 3.3K ohms that was burned? I ask because that is a series input resister to the power amp IC and i can’t see it getting the current to “blow” it. If that is the resister, could it have been cracked instead? As to the noise can you describe its character. Can you check if you are getting a DC voltage on the output with the speakers disconnected?

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