Circuit Board Replacement - CAIRE FreeStyle Manual

CIRCUIT BOARD REPLACEMENT
Turn OFF the unit, remove the battery, and disconnect the power
cord from the electrical outlet before servicing to prevent
accidental electrical shock and burn hazard.
When replacing the circuit board, always use an ESD safe-work
area. Also, use an ESD wrist strap to protect electronic circuitry.
1. Remove the front and back covers per the HOUSING REMOVAL section of this manual.
2. Remove the inlet screen.
3. Remove the PSA system per the PSA REMOVAL section of this manual.
4. Remove the DC power input connector from the J11 (for FreeStyle) or J13 (for FreeStyle 5)
location on the circuit board.
5. Disconnect the control panel/keypad flex circuit from the Ziff (zero insertion force)
connector by carefully lifting upward on the locking tab. This connection is J8 for the
FreeStyle and J9/J10 for the FreeStyle 5.
Portable Oxygen Concentrator
Figure 22.1: J11 Connection
MN220-1 B 77