10
REPLACING THE CONVERTER SECTION (MBA)
DC Wire Removal:
1. Drop door down and remove the door assembly by loosening the two screws in the middle of
the door assembly. The screws are captive and will not fall out. Pull out at the top of the door
assembly to remove from case.
2. On the bottom left side of the fuse board find the lug that is marked NEG and has a white wire
going to it. Loosen screw and remove wire.
3. On the bottom right side of the fuse board find the lug that is marked VCC and has a red wire
going to it. Loosen screw and remove wire.
AC Wire Removal:
CAUTION: MAKE SURE THE RV IS UNPLUGGED FROM ANY 110V POWER SOURCE (SHORE
CORD, GENERATOR, OR INVERTER).
4. Remove the converter black wire from the breaker. NOTE: This wire has a metal pin that is
inserted into the breaker with a pigtail wire added to it. If the pigtail wire is connected to
another wire, disconnect that wire from the pigtail.
5. Remove the converter white wire from the neutral bus bar.
6. Remove the converter green wire from the ground bus bar.
7. In the converter compartment, remove the two screws at the front of the MBA holding it in
place. Slide the MBA forward routing the wires through the slots in the case until you see the
majority of the MBA board. Disconnect the 4-pin connector on the MBA control board by
gently pulling it out of its socket. Similarly, disconnect the 3-pin connector from the small
vertical daughter board. At this time, you can pull the MBA fully out of the case.
NOTE:
When installing a replacement MBA, reverse the order of steps 1-7. If the MBA is being
returned under a warranty claim, follow the packaging instructions in your warranty
claim packet.
Figure 5
