(5) Heat sink number 2. Heat sink number 2 is indirectly chassis mounted
through two standoffs. Two slot-head screws secure heat sink #2 to these standoffs. Before
removing these screws, six wires must be disconnected at terminal boards 1 and 2 (TB1
and TB2) and other wires at locations as noted. Disconnect the yellow wire with the
male in-line "fast-on" terminal positioned along the side of transformer (T1). Disconnect
the two yellow wires going to TB1-1, the red wire going to TB1-2, the orange wire going
to TB2-2, the blue wire going to TB2-4, and the red wire going to TB2-3. The two green
wires from T1 (secondary) can be removed at the D1-4 "fast-on" terminals. Remove the
two screws, previously mentioned. Note two black wires are ring-terminal connected to
ground through one screw. Disconnect the vacuum tubing entering the solenoid. To
reassemble, position heat sink #2 over its respective standoffs and secure, ensuring
both ground wires (black) are tightened beneath the front screw. Connect the vacuum
tubing to the solenoid and reattach the remaining wires to their respective locations.
(6) Transformer. The transformer is secured to the chassis by two number 10-32
Keps nuts. Disconnect the two green wires (transformer secondary) at D1-4 ("fast-on"
connections), one gray wire at TB1-3 (model 306 only) and the other gray wire at TB2-1.
(Model 306M only. Disconnect the orange and violet wires connected to the
transformer primary ["fast-on" connections].) The transformer can now be removed
using the 3/8-inch open-end wrench. To reassemble, reconnect all the wires as
indicated. Secure the rear panel to each sub-side panel. Connect the vacuum tubing.
Remount the bottom cover.