Your Balboa Circuit Board - Balboa Direct Balboa Direct Support Replacing Your Circuit Board. #3 -This is the chip number of the board. If the sticker with the board number and serial number is not present, you can identify the board using the chip number. On this example board, the chip number is 2000M7R15. By using the Balboa System Board Chipset Cross Reference,.. Balboa manualtroubleshootingandservice reva - slideshare Dec 01, 2012Balboa manualtroubleshootingandservice reva. First, turn off the main circuit breaker, then remove both Check the label in the system box near TB1 to determine heater straps or wires from the system heater output, the maximum amperage draw for the system. not the heater itself. Be sure the G.F.C.I.