you are correct. tip42 are PNP, 102 and 122 are NPN. Refer to the schematic and not the part layout or BOM whenever you are unsure of a part. Typographical errors exist in lots of these manuals, but almost 100% of the time the schematic is correct.

Lamp rows (Q83-Q90) are NPN darlington transistors TIP102
Lamp columns (Q91-Q98) are PNP darlington transistors TIP107

Both of my WPC schematics (1993 and WPC-S) say the rows are TIP102 (NPN) and the columns are TIP107 (PNP). I doubt such a basic error would have lasted through several editions of the schematics.

Which specific transistor number are you questioning?

Thanks SealClubber for bringing this up. That was a cut and paste error that I made. I'd copied that section from the System 11 section and missed that edit.

Cheers to you!
--
Chris Hibler - CARGPB #31
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htt://webpages.charter.net/chibler/Pinball/index.htm
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In the sys 9 games, there is an error where the bom calls for a "2n3904 PNP" which made its way into sorcerer, comet, and space shuttle manuals. Obviously a 2n3904 is an N-channel transistor, but it can be misleading. But the schematics are correct on all 3.

You need a high gain NPN transistor for the matrix. The TIP102 and TIP122 both have a minimum gain of 1000, the -102 being a maximum of 20,000. Both are 100V Darlingtons. This means they use very little current to fully saturate.

The TIP42 is a PNP with a gain of 30. Even if you used a TIP47 which is an NPN, the gain would be insufficient.

If you have an issue with excessive load on the transistor and you have confirmed that it's not a shorted component causing it, you could always substitute a TIP142 in place of it, although the package is larger.