Help diagnosing flipper issues

[Sinbad79]

I have an issue with a demo man, rebuilt the flippers however using the coils that came with the machine.
up until i tore the machine down, flippers were operating as expected.

Fired up the game tonight to test and noticed that the top left flipper does not hold in the up position despite the button being pressed.
upon doing a flipper test in the menu system, notice that the hold test does not work at all for the upper left flipper, and is extremely weak on the lower right flipper. Lower left flipper works as it should.

Any ideas?

[Sinbad79]

i just noticed there are no diodes on the upper left flipper coil.
both lower flipper coils do have diodes.


upon closer inspection, the upper left coil appears damaged, i'll replace it, and the lower right coil and see where we land.... not what i wanted.

[Strangeways]

Verify that the correct coils are in the game - that would be my first step.

B/W flipper coils must have diodes for both windings.

[Sinbad79]

definitely one bad coil and im thinking to check diodes on the other weak coil...

[Sinbad79]

manual only stipulates that coil FL-11629 is used, doesnt specify if diodes setup?

[studley67]

information i found sugests these are for the lower flippers on demo man

[studley67]

http://techniek.flipperwinkel.nl/wpc/index3.htm

[studley67]

https://pinside.com/pinball/forum/topic/fl-11630-why-no-diodes-demolition-man

this link is the most relavent to your issue but the rest is good information and need to be read.