Velleman К8077 Manuel d'utilisateur télécharger pdf (Page 13)

26. Fixing the power transistors T8 (TIP147) & T9 (TIP142)

Fixing power transistors

bend both transistors as indicated.

• apply a drop of heat conductive compound on the heatsink.

• position the mica onto the heatsink so that the hole coincide with the hole in

the heatsink, press gently.

• apply a drop of heat conductive compound on the mica.

• Mount the transistor on the heatsink, using a 16mm bolt, lock washer and nut.

 Make sure the transistor leads are correctly positioned

between the pins of the pinheader.

• Tighten gently.

Heat conductive

compound

Lock washer

M3 nut

M3 bolt

mica

T8 (TIP147)

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Velleman К8077 Manuel d'utilisateur Page 13