(Topic ID: 333436)

Flipper clown roto target coil

By durriti

1 year ago

Topic Stats

  • 3 posts
  • 2 Pinsiders participating
  • Latest reply 1 year ago by durriti
  • No one calls this topic a favorite


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#1 1 year ago

When l activate the G relay, (roto target spin relay), the roto coil just move a little, not enough to move the target one place. My flipper parade roto target tends to spin thr target roughly 120-180 degress when activated. l've checked the soldered connections on the coil which are good, the thin wires that go into the wound coil are green with corrosion. l'm wondering if this is causing a short within the coil. When the coil is activated l can hold the plunger still with out it puting up any sort of a fight, try doing that with a flipper coil!.
The coil in the roto target is similar in size/type to the bank reset coil, it quite a beast. l'm wondering if there's any test to confirm the coil is dying or dead?.

#2 1 year ago

The schematic calls for an A-5197 as the "Roto Unit Drive Coil", which according to https://www.flippers.com/coil-resistance.html should have a resistance of just over 2 ohms. You should be able to measure its resistance (across the two solder lugs) in circuit assuming you have no wiring issues because the G relay switch that drives it should be open. You could desolder one lug and measure the resistance again to be sure of your measurement.


#3 1 year ago

Hello Mark,

l've removed the assembly completely as it's not easy to get to the coil. With the coil desoldered on it's own, meter set to 200 ohms range it reads 13.4 which is higher than the reset coil which reads 2.4, which l guess means l need another coil.

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