Blaupunkt Memphis Backlights

In Car Entertainment - NO SELLING OF I.C.E. PLEASE

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M3kuksport
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Wed Oct 28, 2020 7:35 pm

Anyone know where I can get replacement lamps for the display?
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Brianmoooore
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Wed Oct 28, 2020 10:53 pm

I've no idea what these look like, but look through "lamps" in the CPC and RS online catalogues.
If there's two lamps, they may be parallel connected, and be 12 volts, or series connected, and be 6 volts.
If there's two, and they both failed at the same time, they will likely be 6 volts, and one will still be good. Find the good one, apply six volts to it, and measure the current it is drawing. Multiply the current in amps by the voltage, and you will get the power of the lamp in watts, which will help identify the correct ones.
Don't reuse the good one - change both to ensure they balance.
M3kuksport
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Thu Oct 29, 2020 7:35 pm

I'll post a pic soon but there are 4 lights for the display and they look to be 2 pairs in series because 1 has gone and none light up.
M3kuksport
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Thu Oct 29, 2020 7:50 pm

https://uk.rs-online.com/web/p/filament ... s/8896935/

Found these on RS, back order though.
M3kuksport
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Thu Oct 29, 2020 7:56 pm

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Brianmoooore
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Thu Oct 29, 2020 9:31 pm

M3kuksport wrote:
Thu Oct 29, 2020 7:35 pm
I'll post a pic soon but there are 4 lights for the display and they look to be 2 pairs in series because 1 has gone and none light up.
In that case, they're probably 3 volt each. You need to take one of the good ones and power it up while measuring the current it takes. You should be able to estimate its voltage rating by looking at how white the light is. These sort of lamps usually operate at quite a low colour temperature, a yellowish light, something like 2500 degrees C.
The only 3V wire ended lamps I can find are these from Mouser: https://www.mouser.co.uk/ProductDetail/ ... P8tg%3D%3D which are in stock.
CPC and RS do nothing under 5 volt, although it should be possible to rearrange the wiring so that you have two sets of 6 volt lamps in series (series/parallel), or even connect four 12 volt lamps in parallel.
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