Bush RP50 Indicator bulb

[irongecko]

I'm trying to get a bush RP50 working again, and it appears the indicator bulb is blown. The buld itself is marked "ENG 6V .5A" but I know this rating must be wrong as I measured 240vac accross the bulb holder terminals.

Does anyone know the correct type of bulb to replace the light?

[vidjoman]

I recall that the bulb is rated like yours as it is in series with the mains input and acts as a fuse. If you are measuring the voltage without the bulb in circuit you will measure 240 volts across the bulb holder. If the bulb has blown you need to check for a fault in the circuit before replacement. Normally it will glow rather than be a bright light.

[Station X]

Hello and welcome to the forums.

Service information for your player is available here:-

https://www.service-data.com/product...29/9579/m17029

The lamp you mention is connected in series with the mains supply to the player and acts as a fuse. With no lamp fitted you will measure 240VAC across the lamp holder as there'll be no volt drop within the player itself. Fit the correct lamp and you should measure the correct voltage.

The lamp is specified as 6.2 Volts 0.3 Amps Miniature Edison Screw (MES)

Edit. Crossed with Vijoman, but we're both singing from the same hymn sheet!

[Nickthedentist]

Has it "blown" violently, i.e. because of a fault causing an overload?

Or has the filament just fractured, as they can after many years and knocks?

If the former, you'll have to find the fault which caused it to blow too.

[irongecko]

The bulb never worked, but I have the unit on and humming after I bridged the indicator. Just need to work out how to get the turntable working now.

Thanks for the help in identifying the right bulb

[Station X]

Originally Posted by irongecko

I bridged the indicator.

Hardly a wise thing to do. The fuse lamp is there for a reason.

[Edward Huggins]

Originally Posted by irongecko

The bulb never worked, but I have the unit on and humming after I bridged the indicator. Just need to work out how to get the turntable working now.

Thanks for the help in identifying the right bulb

The turntable in your RP50 should be a BSR UA25. The service data for this can be found in the "Service Data" section at the top RHS of this page. These are usually simple to fix. The hum you mention is capable of being tamed. Check the fuse in the mains plug is a 3A and not a 13A - as you're currently working on this without the "lamp fuse" in series.