SECTION 15—P.C. BOARD
59
Perfecto
2
™
SECTION 15—P.C. BOARD
Replacing P.C. Board
DANGER
To prevent electrical shock, ALWAYS disconnect concentrator from electrical outlet
before servicing.
CAUTION
Follow these pre-cautions to prevent damage to the P.C. boards:
Before handling any P.C. boards, you need to be properly grounded to prevent static
damage to the components of the board. A Static Cuff MUST be worn and properly
grounded using an alligator clip. Electrical conduit or a water pipe is normally sufficient
when a known good ground is not available. Care should be taken to ensure that the
alligator clip contacts with bare metal surface.
When removing quick disconnects terminals, DO NOT pull on wire itself as damage to
the connection may occur. Hold down the P.C. board with one hand and use an upward
force with a slight rocking motion to remove the terminals.
Before installing any P.C. boards, ensure that all insulators are in place.
NOTE: For this procedure, refer to FIGURE 15.1 on page 61.
1. Unplug unit.
2. Remove cabinet. Refer to Removing Cabinet on page 23.
3. Remove control panel. Refer to Removing Control Panel on page 54.
4. Do the following:
A. Disconnect wiring harnesses from PC board.
WARNING
DO NOT remove oxygen sensor tubing from P.C. board. Remove from regulator ONLY.
DO NOT remove the pressure sensor tubing from P.C. board. Remove from top of
product tank only. Damage to oxygen sensor assembly or pressure sensor could occur. A
faulty sensor may result in improper oxygen delivery and harm to the user.
B. Disconnect pressure sensor tubing from product tank, not P.C. Board.
C. For concentrators that have O2 sensor, disconnect the oxygen sensor tubing from
regulator fitting. Refer to Replacing Regulator on page 49.
5. Remove the two mounting screws on top corners of P.C. board.
6. Position new
P.C. board.
