Author Topic: Help with WPC 89 Driver Board Repair.  (Read 9565 times)

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Re: Help with WPC 89 Driver Board Repair.
« on: November 03, 2011, 10:22:12 AM »
Ok,

The arrown on the WPC Schematic for Tip36c and 2N5401 points IN so PNP.  The manual also says PNP for thses two.

BUT, The Tip 102 is drawn differently on the schematic.  It shows two OUT arrows on the left side.  Why two arrows?

Does this make it a NPN?

TIP102 is a "darlington" transistor which is basically two transistors fitted inside the same case. That's why the drawing shpws 2 arrows - if you look closely you should see two transistors drawn there and, as Steevsee said, TIP102 is a "NPN Darlington Transistor"

This pin connections are the same as the TIP36 however with the base (or drive if you like) leg the one on the left.
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