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post #1 of 9 (permalink) Old 9th January 2009 Thread Starter
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Red face Clock/Radio Display Problem

Not getting a proper display on my Radio Display unit. I had to re-code the radio recently and although I can see the display very dimly with the top of the dash off (and successfully recoded it), once the dash is replaced, the display is all but invisible again. The seatbelt light is bright, which would suggest full power is getting to the unit.

Only possible clue that I have is that just below the display there is a clump of wires which, at some time in the past, have been disconnected (cut off short). There is one thick wire, and two or three thinner wires.

As far as I can see, there are only two connectors to the display unit and two bulbs. (Unless you know different)! No empty sockets in the unit that I can see. Just these two long ones.

Whether this is relevant to the display or not, I know not. I'm wondering whether it is, or whether it is from some previously disconnected accessory? Any ideas?

Next step is to take the bulbs out and test them, but I'm assuming that they are for night use, and come on with the lights? Or do the bulbs illuminate the LCD even in daytime?

As always any ideas, including possible test procedures welcome.

I have been told that these displays, especially orange displays are susceptible to sunlight, but it seems a funny place for sunlight to get to.

Thanks for any ideas.
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post #2 of 9 (permalink) Old 9th January 2009
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Are all other dash lights bright?

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post #3 of 9 (permalink) Old 9th January 2009
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The bulbs light at all times - thus the "illuminated" orange figures in the display during daytime viewing. In fact at headllights on they dim from day setting to reduce the glare effect. So most likely cause is probably bulbs failed or disconnected.
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post #4 of 9 (permalink) Old 9th January 2009
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Yep,the display is lit up all the time so I strongly suspect that the bulbs have blown.There are (from memory) 2 bulbs in the unit and they can be replaced with 286 bulbs if you remove them from their plastic holders.

I'd rather push my Alfa than drive a BMW....
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post #5 of 9 (permalink) Old 9th January 2009
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Been there, seen that, got the t-shirt

Yup, the bulbs in the back of the display are gone.

It's fairly easy to replace them, they're common all-glass mini bulbs, Halfords have them.

I have replaced them with white LED so they don't wear / blow - though I don't recommend it if you're not a skilled electronics engineer, you need to put a resistor in the loop, LEDs work at 1.5/2 Vcc and 12 Vcc are enough to blow the top off them.

To take the central console off is easy, just three screws around it. The problem is that to access the three little b****rs you have to dismantle half the fascia.

However, here's the lowdown: take the tweeters grilles off (just pry them out with a flat screwdriver).
You'll see a screw each side holding down the top of the fascia, remove them and pop off the top panel of the fascia. You're done, take the three screws off and detach all connectors.
To take the bulbs out, twist the white clips that hold them in place 90', then pull the bulb out.

Reverse to refit, done.

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clock or radio , display , problem

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