Quoted from Roamin:A shorted transistor shouldn't smoke up a coil
If the transistor is shorted to ground, as soon as the board is powered up the associated coil activates. It starts smoking soon after that.
(Topic ID: 294947)
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No Good Gofers
Williams, 1997
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Quoted from Pin_Guy:the tab of the TIP36C is tied to ground making this an invalid test.
Quoted from Acronymicon:This quick test works only with TIP-102s and with TIP-36c transistors >since the tab of a TIP-36c is NOT connected to ground.
Paging a Pinwiki editor. ForceFlow ,
ChrisHibler can we get https://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Transistor_.22Quick_Check.22 updated?
I notice further down in the Pinwiki at https://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Coil_Fails_to_Work
in paragraph 2 it says, “ With the game powered on, and a short length of wire stripped on both ends, touch one end of the wire to the ground braid in the head. Touch the other end of the wire BRIEFLY to the tab of the associated TIP-102. If the coil pulls in, then the path to ground has been proven and the failure is likely the TIP-102 itself. NOTE: This test can be performed ONLY when a TIP-102 is the drive transistor. TIP-36c transistors are configured differently. The tab of a TIP-36c is not connected in the same way internally.”
Might need a change there too?
3 weeks later
Quoted from jrobinso99:Test to the middle leg and the right leg with the red lead.
You should get a reading between .3 – .9 volts
Ohms? Do you have a link to the procedure?
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