Friday, April 5, 2013

Module masters for faded clock repair

The clock display can disappear if the voltage or ground is poor.  Check grounds and the power pass through on the fire wall inside the engine compartment. 

Clock Modules
For this rebuild to work, your dead LCD clock must have a normal silver/beige color background. Some faded digits or parts of numbers with even color background are perfect for this rebuild. If your display glass is cracked or you notice any abnormal black hazing when the dead clock screen is viewed at certain angles; this means the polarizer element is damaged. Such repair requires a new LCD panel which is not available from any manufacturer at this time. Wait a few more months and our custom replacement panels should be available by then and will be updated here.

This rebuild is guaranteed to restore dim or missing segments in your Jaguar LCD clock. We use only the highest quality new components including your choice of blue or green LED backlighting. The original backlighting used incandescent bulbs which got hot enough to cause damage. These bulbs are replaced with cool factory-colored LEDs to ensure the LCD remains trouble free for the life of the car. We also replace the flexible PCB ribbon cable and all remaining incandescent control button lamps are replaced with brand new (twist lock as OEM) color matched lamps. New set of lamps from the dealer cost more than this rebuild alone!

Rebuild applies to all Jaguar clock/switch assemblies with or without seat heater buttons. You get:

> New microcontroller to LCD interface to restore the dead display.

> Brightness matched green LED backlighting for the LCD clock.

> All new OEM color matched incandescent lamps for control buttons.

> Lifetime guarantee of your LCD display repair which includes LED units, does not apply to incandescent lamps for buttons.

Please specify your preference of blue or green backlighting in the comments field of the order form.

1996 and later Jaguar models

As an alternative

Got around to investigating this yesterday. The basic problem is that most
of the segments were faint, if visible at all.

Getting to the clock is straightforward - remove the ski-slope, pull out the
climate/clock/hifi unit, disconnect the plug and undo the four screws
holding the clock module in place. There are then half a dozen little screws
on the back of the module, after which you can gently prise off the back,
which is held in place by 6 plastic lugs.

The pcb is also held by a couple of plastic lugs after which you can move
the display itself. This is connected to the pcb by a flexible plastic pcb,
which appears to be glued onto the pcb.

And here's the problem - the glue seems to die and so the connection between
main pcb and the flexible pcb is weak. Connect the thing back up to the
car,l whilst still in bits, and squeeze the plastic back down on to the pcb
and hey presto - proper display again! The left hand corner was particularly
senstive so I guess was a common return for all the segments.

I'm pretty sure my domestic glue is not conductive, so I just reglued right
on the edge of the plastic, away from the tracks. I then got a couple of
pieces of thick cardboard - actually cut from a takeout pizza box - about
30mm x 5mm and located them behind the main pcb and in front of the flexible
pcb across the length of the connection.

Fit the main pcb into it's lugs, then refit the plastic back cover. With the
card in place, it was quite hard to be able to get the lugs to click in and
hold the cover on. However, this does mean that the cardboard is pressing
real hard on that connection and when installed back in the car, all is

If you get the card too thick, then either you can't get the back cover on
or if you do, the little switches to set the time don't actuate.

I guess this is the sort of repair which a lot of folk don't approve of, but
in the absence of specialist tools etc it took me an hour and a half from
start to finish, cost nothing and works fine!

Hope this is useful to someone else. I read that Richard has maybe just
developed the same problem!

Cheers - Jez


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