Simplest way to change Beomaster 4400 FM signal level lamp

[Stephen Taylor]

Hello!

I’ve been working on a Beomaster 4400 renovation for a few weeks now.

I bought it “completely dead” and true to the seller’s word it was totally lifeless.

Turned out someone else had attempted some repairs which ensured it would be a long road back to functionality.

Anyway having replaced all the semiconductors in the output stages (and a few others), quite a few resistors and finally some fuses, I’m now at the point where I can power it up and see correct voltages at test points.

It’s time to tackle the job that I’ve been putting off which scares me the most – I need to replace the lamp on FM signal level meter.

Is there a way to do this without taking the front panel off?

If there isn’t can anyone who’s done it point me in the direction of some instructions?

Everything else about the front panel works really nicely so I’d really like to avoid giving the ribbon PCB the opportunity to splinter.

I’ve had another look around the forum and it seems like most of the lamps are on a bayonet mount and pull out – does that go for the lamp on the signal level indicator?  It all looks very tight in there.

Thanks!

heSteve

Without want to seem smug, here are some photos of the repair that someone had attempted and one of the many transistors that had failed, presumably subsequently.

 

• This topic was modified 2 days, 23 hours ago by Stephen Taylor.
• This topic was modified 2 days, 23 hours ago by Stephen Taylor.

[hcraig244]

It’s tricky…

You dont need to remove the front panel, thank goodness…..would be a shocking design defect if one did. The lamp is held in a holder that slides into the side of the moving coil meter, the holder has two wires soldered to it to illuminate the lamp therein. the meter also has two wires soldered on to it externally to power the moving coil, cant remember if its a moving coil or moving iron meter…..non the less it has two wires!

The meter is held in place on the front panel by a copper leaf spring which in turn is held in place by a single screw, see below

 

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