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ManualsBrandsEssex Electronics ManualsComputer equipmentK1 Series
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Security Device Maintenance
2–42 V Series Service Manual
Replacing the
inside circuit
board
To replace the inside circuit board:
1. Remove the inside and outside trim. For instructions, see To remove
the inside and outside trim: on page 2-38.
Caution
Before you handle the circuit board or any component on the circuit
board, make sure that you are properly grounded using an
electrostatic discharge (ESD) protection kit. When ordering an ESD
protection kit, refer to the part number on page 2–27. Touching the
circuit board without proper grounding can damage sensitive
electronic components—even if you don’t notice any static discharge.
2. Disconnect the inside wire harness from the circuit board.
3. Unscrew the four circuit board mounting screws. Save the screws.
4. Remove the circuit board and place it in an anti-static bag.
Note: You may need to remove the PROM from the existing circuit
board and install it into the new circuit board. For more
information, see Replacing the PROM on page 2-44.
5. Position the new circuit board in the inside trim and secure it using
the four circuit board mounting screws.
6. Reconnect the inside wire harness to the circuit board.
7. Reinstall the inside and outside trim. For instructions, see To
reinstall the inside and outside trim: on page 2-39.
Replacing the
card reader or
keypad reader
To replace a magnetic stripe card reader, replace the:
■ reader only.
To replace a keypad reader, replace the:
■ keypad assembly
■ reader electronics.
To replace a proximity card reader, replace the:
■ proximity bezel
■ wake-up electronics assembly.
To replace the magnetic card reader
1. Remove the inside and outside trim. For instructions, see To remove
the inside and outside trim: on page 2-38.
2. Unscrew the two circuit board mounting screws. Save the harness
clip and screws.
3. Disconnect the outside wire harness from the circuit board on the
card reader.
4. Remove the card reader.
5. Position the new card reader in the outside trim and secure it with
the two mounting screws. Do not tighten the left screw.