PinLED Fliptronic I+II Board 10032

Symptom: Some solenoids (specially ramp diverters), that are also controlled by the Fliptronic Board didn't work proper after swapping to the PinLED Fliptronic Board I+II.
Reason: There are varistors installed on the PinLED Fliptronic Board I+II as free wheeling devices. These varistors cannot handle the energy amount causing by a coil while switching off as normal diodes. Therefore the pulsed coils like ramp diverter didn't work properly and they wouldn't energize.
Solution: Change of the eight varistors to eight free wheeling diodes of type 1N4004.

Conversion instruction

Overview of the used parts:
  • Eight diodes of type 1N4004 (or 1N4007)
  • One short piece of wire
The eight varistors (blue or yellow) are located directly above the eight MOSFETs.
Remove the varistors with a small cutter.
Lay the board on the back and remove the left over wire ends of the varistors. Remove only the one end remaining in the big solder pad. You can leave the other end (right above each solder pad) as it is (it's no longer in use).
Clean up the holes with a desoldering pump or desoldering wick so you can stick one wire of the diodes through the hole.
Cathode ring of the diode.
Stick the eight diodes through the eight holes directly above the eight MOSFETs. The cathode of the diodes (silver ring) faces upwards. Sometime it helps if you heat up the wire to force it through the hole of the board.
Solder the diodes on the backside of the board and cut the overlapping wires.
Bend the other wires of the diodes in a right angle to the right side. They will be soldered in the next step.
Solder all eight wires of the diodes (cathodes) together.
All wires of the diodes (cathodes) are soldered together.
Cut a short length of wire and solder it directly to the lower fuse clip of the upper left fuse (F902).
Solder the other end to the cathodes of the eight diodes.
Overview of the finished soldering.

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