Around march, a cluster from France arrived with the famous "permanent brake system warning" and about 70.000 km of roads travelled. Using the tester, the issue was confirmed quickly. RPM values were ~500 too high, speed about 10 km/h too much. Illumination bulbs were darkened but all working - quite normal values for a cluster of this age and mileage.
Corrosion near the ceramic hybrid chip (HIC) marked the reason for the permanent brake system warning.
One of the larger voltage stabilization capacitors showed heat damage - visible as heat shrink that starts creeping away:
All components were removed, cleaned thoroughly and re-installed with a complete set of new capacitors, carefully selected to match their original purpose (like low electric leakage and bi-polar).
Followed by checks and calibration, confirming the brake system error was fixed, all indicators were working and the illumination was even across the whole cluster.
PS: The animated GIF from the speed dial somehow isn't working ..
RPM being ~500 off
darkened bulbs
Corrosion near the ceramic hybrid chip (HIC) marked the reason for the permanent brake system warning.
.. at the middle of the special IC
One of the larger voltage stabilization capacitors showed heat damage - visible as heat shrink that starts creeping away:
All components were removed, cleaned thoroughly and re-installed with a complete set of new capacitors, carefully selected to match their original purpose (like low electric leakage and bi-polar).
cleaned and tinned
all in place
replaced where appropriate
Followed by checks and calibration, confirming the brake system error was fixed, all indicators were working and the illumination was even across the whole cluster.
night view
PS: The animated GIF from the speed dial somehow isn't working ..
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