Speedo Display Screen Flashing - help / advice
04-12-2007, 12:19 AM
#1
Speedo Display Screen Flashing - help / advice
My multi-function display in lower half of the tach (not the individual LED's elsewhere in the cluster) is on the "blink"....literally.
It's fine when cold but seems to loose it as it gets electrically warm (5-15 minutes).
The failure sequence is that it starts to flash on/off, then the text may rotate upside down, but eventually it goes dark. It the whole screen, not justy part of it. I'm guessing it's some kind of op-amp or similar driver and not the display screen itself. Using the oil level check accelerates things as it seems to draw more juice.
If anyone has been there before, please advise. THANKS.
It's fine when cold but seems to loose it as it gets electrically warm (5-15 minutes).
The failure sequence is that it starts to flash on/off, then the text may rotate upside down, but eventually it goes dark. It the whole screen, not justy part of it. I'm guessing it's some kind of op-amp or similar driver and not the display screen itself. Using the oil level check accelerates things as it seems to draw more juice.
If anyone has been there before, please advise. THANKS.
04-29-2007, 03:51 PM
#7
Problem solved; Thanks for all help.
Here's what I learned:
- the problem was the LCD screen itself (even though I'd have sworn is was some kind of power driver or other input since the screen lit ok but would turn upside down and other crazy stuff)
- The screen is an easy plug and play replacement ( 1.5 x 3" glass, snap in to frame, ribbon wire into snap in/out connector)
- The whole cluster comes apart easily. Care taken not to move the needles around on the gages or else you have to drive to to re-position them.
- There are 3 of the ribbon wire connectors; each has a snap/up/down "collet' type of frame; carefully pull it out (just a bit or you'll break it) on both ends and then the ribbon slides out. Reverse it to connect.
- There are several circuit boards in there; but the "main board", which is the one with the LCD screen on it is the one with the barins and the memory of mileage etc. It can be swapped complete too.....but the mileage moves with the board.
-Having now played with a few of these you can;
a) adjust/calibrate the fuel gage just by moving the needle, and the "low light changes too"
b) all the other gage needles can be calibrated in the same way, but the LED Speed is electronnically calibraded and I can't find a way to adjust it.
That is a problem for me as mine reads 3-4 MPH high (to the tach and to external speed radars in my area).
Here's what I learned:
- the problem was the LCD screen itself (even though I'd have sworn is was some kind of power driver or other input since the screen lit ok but would turn upside down and other crazy stuff)
- The screen is an easy plug and play replacement ( 1.5 x 3" glass, snap in to frame, ribbon wire into snap in/out connector)
- The whole cluster comes apart easily. Care taken not to move the needles around on the gages or else you have to drive to to re-position them.
- There are 3 of the ribbon wire connectors; each has a snap/up/down "collet' type of frame; carefully pull it out (just a bit or you'll break it) on both ends and then the ribbon slides out. Reverse it to connect.
- There are several circuit boards in there; but the "main board", which is the one with the LCD screen on it is the one with the barins and the memory of mileage etc. It can be swapped complete too.....but the mileage moves with the board.
-Having now played with a few of these you can;
a) adjust/calibrate the fuel gage just by moving the needle, and the "low light changes too"
b) all the other gage needles can be calibrated in the same way, but the LED Speed is electronnically calibraded and I can't find a way to adjust it.
That is a problem for me as mine reads 3-4 MPH high (to the tach and to external speed radars in my area).
