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Maintenance
6–26
THS710A, THS720A, THS730A & THS720P Service Manual
5. To prepare the main board and switch flex circuit board for installation into
the chassis, follow these steps:
a. Fold the switch flex-circuit assembly toward you.
b. Dress the battery wires away from you.
c. Dress the two coaxial cables that will connect to the BNC connectors to
a position under the main board.
d. Dress the two wires that will connect to the banana jacks to a position
under the main board.
6. To install the main board and switch flex-circuit assembly into the chassis,
follow these steps:
a. Place the chassis on a soft, static-free surface with the BNC connectors
facing away from you and the banana jacks facing left.
b. Lift the main board and switch flex-circuit assembly together and turn
them over keeping the switch flex-circuit assembly facing you.
c. Place the main board and switch flex-circuit assembly on the chassis so
that you can attach the two wires to the back of the banana jacks.
d. Use the needle-nose pliers to attach both wires to the back side of the
banana jacks. Be careful not to deform the connectors attached to the
wires. Dress the wires so that they will fit between the main baord and
the chassis.
e. Insert the four tabs on the left side of the main board into their rectangu-
lar holes in the chassis as shown in Figure 6–16.
f. While lowering the right side of the main board, dress the battery wires
into the slot in the chassis.
g. When the main board is lowered in place, snap it into the six retaining
snaps of the chassis.
h. Use the needle-nose pliers to insert both coaxial connectors into the back
side of the BNC connectors. Be careful not to crush the cable or bend the
center conductor.