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Tracking force set correctly?
Tonearm lowering depth set correctly?Martin
Does it say Beogram 4002 or 4004 on the operating panel?
Does the panel have a connector to the “output” board?Martin
Take apart and clean. In most cases that’ll do it.
Else, the friction can be increased if you rough up the plastic surfaces a bit.Martin
The felt clutch could have lost friction.
Can you tell, if it’s slipping?Martin
Whisch type of transistor did you fit for IC9?
All lamps working and correct wattage? – No LED “conversion”?
The three lamps illuminating the tone control dials double as bleeders for the 15V supply.
It’s not uncommon to see that these Beomasters won’t go into standby, if to many
lamps are out, wrong or replaced by LEDs.Martin
The identification sticker is found at the back of the main unit, – not visible when
the main unit is mounted in the metal bracket.
Most BeoSystem 2500 has the name printed at the lower left of the shiny front panel – below the tape bay, and yours doesn’t seem to have this, so my guess would
be BeoSound Ouverture or BeoCenter 2500, with Beolab 2500 speakers.Martin
Check IC9 (SPS5431).
Martin
I normally work within the small space allowed by the spring action.
Martin
Yes, the cam wheel on top needs to come off.
You can take it off and, while keeping the strings tight, take out the worm gear assy with
the felt clutch, and put back the cam while working with the clutch assy.Martin
The very thin leads from the cone to the voicecoil tend to break under the lip of the center dustcap. It’s quite common for Beovox S120 and Beovox MC120.2.
Most can be repaired if you work carefully.Martin
Replace the standby relay. It must be hanging (welded contacts), allowing the output stages to be powered even in standby.
Martin
Is it only the far right side of the cooling fin that is warm?
And how warm?Martin
Yes, wrong tracking force setting. Check it with a gauge and reset the scale if it is off.
Or damaged stylus.Martin
Resolder the relay for the amplifier.
Its solder joints for the coil cracks, making it impossible to pull the relay and close down the amplifier.
– Yes, this relay is active when the Beomaster is in standby.Still no luck – replace the relay (new relay here).
Martin
Bad solder joints?
Martin
They are excellent decks, great performers and a fantastic design.
Absolutely worth restoring. Not sure why anybody would say otherwise.Clean the laser lens.
Check if the drive suspension rubber parts have deformed, allowing the drive to sag down.
This typically causes the disc to rub on the tray when rotating, and it can cause many strange symptoms.
Replacing the tray belt is a two-minute job when the cover is off.Check for cracked solder joints at connectors and other large components, and
particularly the center pins of the large filter capacitors.And replace capacitors on the servo board (grab a kit containing the correct type of caps).
They can also cause many strange problems.Keep in mind, that CDRs are not following standards. The same goes for many types of
copy-protected discs (“Copy-Control” etc.).
Most Beogram CD5500 will play CDRs without any problems, but it cannot be guaranteed
that all decks will play all CDR discs.
And not all CDRs age well. Over time they may lose information making them more or less unreadable.Martin
Gorgeous piece!
Martin
Replace the wedge-shaped belt for the carriage motor.
Also dirt and/or dry lubricants towards the leftmost end of the threaded spindle can cause
excess friction and make the belt slip.
Clean the threaded shaft and add a handful tiny drops of teflon oil.Martin
You cannot tell if they are any good by looking at them.
They will be out of spec by now, that’s almost guaranteed after all these years.
Capacitor kit here.Martin
Running the power output of Beomaster 8000 to the input of another amplifier (Beolab 8000 is an active speaker) could easily destroy both.
How did you connect it?Martin
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