Interior Dash Clock

[ste68blue]

Hi all, now am sure this subject has been raised before, so apologies if i am repeating anything....

I decided to have a crack at fixing my interior dash clock light, got clocks out, changed the bulb, but the light didn't work.

Now i have come to the conclusion that it is the little resistor that is at fault, so my question is has anyone replaced the resistor?

I am sure i could get one but i have never soldered onto the soft plastic type printed circuit board before, can anyone offer any advice?

Cheers
stephen

 

[R1cho]

before doing that make sure you check your fuses to make sure its not one of them at fault

 

[ste68blue]

Hi rich, I tetsed it and there is feed going to one side of the resistor but not passing through, so has to be the resistor...
I just aren't too sure about desoldering and resoldering a new resistor onto the soft plastic type circuit board..

 

[R1cho]

use some conductive glue

 

[R1cho]

http://cgi.ebay.co.uk/CB-Ham-Radio-...215?pt=LH_DefaultDomain_0&hash=item4cf6490d7f

 

[ste68blue]

Cheers rich, is there anywhere I can get the resistor details?

 

[R1cho]

erm,,,, just do a search on google

 

[ste68blue]

But what do I search for?

 

[R1cho]

dashboard light resistor, are there any numbers on the resistor? if so do a search for resistor and then the numbers, e.g resistor 12345

 

[ste68blue]

the problem is i can't get to the resistor without dismantling the circuit board....what about in the terrano manual??

 

[R1cho]

doubt it not for a small part like that, how did you get at it to test it? there may just be a break in the solder in wwhich case u can just repair with the conductive glue

 

[ste68blue]

I put the lights on, put my tester on one side of the resistor and there was power going to it but when i put my tester on the other side there was nothing coming through it....hope that makes sense?

 

[solarman216]

the resistor will have colored bands on it note the colors and look them up on google the first band is near the end of the resistor it may have gold or silver as the last band this is the tolerance from memory silver = 10 % gold = 5 % Rick

 

[elpeede]

There is the colour code chart you need. Once you figure out the resistance, let me know I'll have a rummage.. as generally the resistors are bought in multipacks.. if you just need 1 or 2 (best to be safe) I'll post you one if I have the one you need.

With regards to soldering... just get some long nose pliers to be able to pull the old resistor out once the sloder is fluid.

To resolder the new.. again get the solder fluid and bob it through the hole. Thenthe other side maye be fiddley to sort.. you can use small crock clips as a heat sink so you don't cook the resistor.. always a good idea.

The other thing which may help given access appears tight is to cut the cuttent resistor as close to the ceramic as you can and solder the new one in to the old resistor wires giving you a bit of space to play with and save you dealing with the circuit board solder. :thumbs

 

[ste68blue]

That's brilliant, thanks for your help
I will probably have another crack at it next weekend, ill let you know how I get on
Cheers
Stephen

 

[elpeede]

Having had more time to think it over you can leave the present resistor in and wrap the new resistor wires arond the old and solder it up.. the knackered one won't affect owt.. and it'll mean your less likely to screw up the board

 

[ste68blue]

That sounds like a plan...cheers

 

[dan]

The circuitboard won't melt - but you will need the needle point on the soldering iron!

Cheats way is to heat the legs and the heat will tranfer down. Most of the time, you would just trace the footing on the rear of the borad. Do not force it, allow it to come off with as little pressure as possible. Usually a very small VDPE screwdriver just resting beneath will be enough.

You can either buy the resistors, or if you can read the resistor, you can steal one from an old piece of circuit board - such as knackered tv, radio, clock - just about anything with a board!