- Joined
- Apr 24, 2018
- Messages
- 83
I'm delighted to have successfully repaired another FD dashboard cluster 
On arrival, the speedo was non-functional. The repair involved significant diagnosis effort and required the replacement of:
- Failed gauge driver IC and needle drive "motor" (and air core gauge)
- numerous capacitors, which had leaked and the corrosive fluid required replacement of the following:
- two transistors
- one power regulator chip
- several diodes
as well as cleaning up the remaining corrosive fluid from the PCB.
Here is a video showing full test of a repaired cluster, prior to returning to customer.
Some photos of typical damage caused by the leakage of corrosive fluid from within electrolytic capacitors (4 large, brown/white cylinders partially shown in first photo) - there are about a dozen of these ticking timebombs on the speedo PCB!
On arrival, the speedo was non-functional. The repair involved significant diagnosis effort and required the replacement of:
- Failed gauge driver IC and needle drive "motor" (and air core gauge)
- numerous capacitors, which had leaked and the corrosive fluid required replacement of the following:
- two transistors
- one power regulator chip
- several diodes
as well as cleaning up the remaining corrosive fluid from the PCB.
Here is a video showing full test of a repaired cluster, prior to returning to customer.
Some photos of typical damage caused by the leakage of corrosive fluid from within electrolytic capacitors (4 large, brown/white cylinders partially shown in first photo) - there are about a dozen of these ticking timebombs on the speedo PCB!