14.3.2. Replacing Main Control Board (A1)

• See also Service Instructions (JD5012-50 & JD5077-00).

Preparation:

• Shut down and lock out all power to ATevo.
• Remove optional user wiring from various printed circuit board (A1, A2, A4, etc.) terminals (TB#).

Removal of Existing Main Control Board:

• Remove ribbon cable lower-right edge of Main Control Board (A1). Board is mounted on four (4) plastic standoffs and one (1) metal ground stud.
• Remove nut from grounding stud on lower-left corner of board.
• Compress tab on each standoff, and pull board toward you until it clears all standoffs.

*If any optional serial communications boards are present (these would be located along left side of Main Control Board), they must be removed along with Main Control Board as a complete assembly. To do so, compress standoffs on each board and pull board toward you until it clears standoffs.

Installation of New Main Control Board:

• Insert replacement board onto instrument panel with same orientation, and push it onto standoffs. Confirm board is fully seated on all four (4) standoffs.
• Install nut onto grounding stud at lower-left corner of board.
• Reconnect ribbon cable at lower-right edge.
• Replace user wiring to various Main Control Board terminals.
• Restart the ATevo.

*Replacement Main Control Boards (A1) must be recalibrated. Run Hindle Health Test to check dc voltmeter accuracy. If installation’s parameters (float voltage, etc.) are different from ATevo factory preset values, these values will need to be re-entered or restored via SD memory card.