Maintenance; General Maintenance Information; Power Pwb Assembly A1; Micro Controller Pwb Assembly A2 - ConMed Sabre 2400 Operators & Service Manual

4.1 GENERAL MAINTENANCE
INFORMATION
This section contains information useful in the
maintenance and repair of the Sabre 2400. While
the unit has been designed and manufactured to
high industry standards, it is recommended that
periodic inspection and performance testing be
performed to ensure continual safe and effective
operation.
Ease of maintenance was a primary consideration
in the design of the Sabre 2400. Maintenance
features of this unit include microprocessor aided
troubleshooting aids and push button calibration,
built in fault detection, circuit simplicity, circuit
protection, use of common parts, easy access to
circuitry while the unit is operational, and fused
power transistors. These features coupled with the
warranty, local support, loaner equipment, fac-
tory support, toll free phone service to the factory
and available factory training ensure the user of a
minimal maintenance effort with extensive sup-
port available.
4.2 ASSEMBLY BREAK DOWN & PARTS
ACCESS
>WARNING<
HAZARDOUS VOLTAGES ARE PRESENT
ON INTERNAL COMPONENTS.
BE SURE THAT THE UNIT IS
TURNED OFF AND THE POWER
PLUG IS DISCONNECTED BEFORE
DISASSEMBLY.
The Sabre 2400 opens into a Base Assembly
and a Top Cover Assembly. To gain access to the
internal parts remove the two Phillips head screws
on the Rear Panel. Refer to Figure 4.1.
R

Maintenance

Section 4.0
Slide the Top Cover forward and lift its front
edge. The Top Cover can be held open vertically
by sliding the Rear Support Bracket Slots onto
the top edge of the Base Assembly. See Figure
4.2. To close the Top Cover, lift it upward until
the Support Bracket Slots are free and then lower
it onto the Base Assembly. Reengage the Front
Closure Pins into the Base Assembly slots before
replacing the rear screws.

4.2.1 Power PWB Assembly A1

To gain access to the circuit side of the A1
Assembly, remove 10 cable connectors (11 con-
nectors on -003 & -015 models). Remove 4 sock-
et head fasteners from the Heatsink. Remove one
socket head fastener from the PWB, and the two
nylon hex nuts from the PWB. Don't remove fas-
teners from the diagonal brace. Note that there
is a nylon push-on standoff at the rear of the A1
PWB assembly. Carefully lift the PWB off the
standoff, then lift the A1 Assembly straight up
and out of the A5 Base Assembly. Verify all cable
connections when reinstalling this Assembly.

4.2.2 Micro Controller PWB Assembly A2

To gain access to the circuit side of the A2
Assembly, remove 4 cable connectors. Remove
three #6 hex nuts clamping the voltage regula-
tors to the cover. Rotate the clamps away from
the voltage regulators. Remove 4 socket head
fasteners from the PWB. Lift the PWB Assembly
from the A4 Cover Assembly. Replace the 3 volt-
age regulator pads when reinstalling. Use Loctite
#222 on all fasteners when reinstalling. Torque
the hex nuts to 5 inch pounds, +1/-0. Verify all
cable connections after reinstalling.
4-1