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Digital clock

13K views 31 replies 10 participants last post by  Talkingcars  
#1 ·
Hi Guys

Does anyone else have an issue with the clock, where by some of the digits aren't being displayed? If I lightly press my finger over them, they will appear.

Viewed another 45 before I got this one and that had the same problem. Accept it was almost the whole display.

This one only misses the last minute. E.g. 5:45 is displayed as 5:4 with the 4 just about visible.


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#10 ·
Don't be misled - the Lucas ones suffer the same issue (as indeed do any LCD screens fitted to any electronic device): ie. quote Gnu, "Rover 200 - Worked/ cells failed/ repaired/ worked/ worked intermittently" - in a Rover 200, it would have been a Lucas one ;)

The LCD display is connected to the circuit board by a ribbon cable which is attached to the contacts on the circuit board by an electrically conductive putty. Over time, this dries and shrinks, thus pulling away from the contacts on the circuit board and breaking the circuit. Repair is usually fairly simple once the lock is dismantled - apply heat (hairdryer of heat gun on a moderate setting) and then use the blunted end of a cocktail stick to rub each contact in turn with firm pressure. This should soften and spread to putty and restore contact again. They do sometimes fail again after a short time, but this is probably due to insufficient heat having been used, so in this case try again but with the heat gun set a little warmer.

Some Rover clocks are difficult to repair due to the poor positioning of the ribbon cable relative to the circuit board contacts; effectively covering the area of the contact by the ribbon cable. In this sort of case, it is difficult to apply sufficient pressure and movement without damaging the cable.
 
#20 ·
As mentioned above bin the pektron clock and replace it with a Lucas clock, in my experience the Lucas has a much lower fail rate. We had two ZS and one rover 25 in the family I replaced the standard pektron on both ZS cars which had failed with a traffic master model. Both these soon failed so I repaired them and one work for a short period the a couple of months so I binned them and replaced with pektron clocks out of late low milage 45,s these then both failed. Next step was to replace both ZS and 25 clocks with Lucas clock from either early 45 or a rover 400 and never had any issues since. I find the pektron clocks temperamental in hot or very cold conditions which doesn't seem to affect my Lucas clock. I used to do a lot of work on motherboards chipping and repairing PS2 and Xbox consoles so know my way around and to me the Lucas just looks a better quality build but that's my personal opinion. The other thing about Lucas clock is I prefer the display to the pektron unit.
 
#24 · (Edited)
A 2004 car would have been factory fitted with a Pektron clock - although it may have been replaced later. The Pektron clocks have the display very close to the front of the clock whereas the Lucas ones have a deeply recessed (maybe 20mm) display - so you can easily see which you have.

All my Pektron clocks have failed (only 2 so not much of a sample).

I've never seen a failed Lucas clock - although I have no doubt that some have failed.

I replaced my failed Pektron clocks with ancient used Lucas ones from a scrapyard as few years ago. All the Lucas clocks I recovered that day (4) worked perfectly. The Lucas clocks are still working fine.
 
#26 ·
Not really worth it in my experience as they always fail again which means you have to go through all the work to remove the clock again, as for Lucas clock identification they are clearly marked Lucas on the rear ( see pic below ) plus the colour of display looks nicer to me but that's personal choice.
Image