Dillen
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The OPA213… is end of life. No longer produced. Grab them while you can.
Or grab a kit containing them, that is pretty much based on the same upgrade theory.Martin
You could put a scope to the output of the tracking opto and follow the signal through the
electronics but, if your deck has not yet been restored with new capacitors etc., I think
that would be the place to start as more issues will almost certainly arise after this one has been fixed.Martin
Do you see light inside the shutter house at the foot of the carriage, when the deck is playing?
Martin
Note there are two types. One for each of the two tape drive versions.
Martin
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
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
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
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
