4.4
PCB Removal and Replacement
The printed circuit boards (PCBs) are protected by a cover
fastened to the antenna support frame. The cover must be
removed to gain access to the main power fuse and the
PCB assemblies discussed below. Refer to Figure 4-2; remove
3 nuts and washers from the bottom flange and 3 screws and
washers from the upper flange. Remove the cover and set aside
with the fasteners.
The PCBs are mounted to the antenna elevation mechanism
support frame with machine screws and are interconnected by
means of keyed Molex connectors. Figure 4-3 shows the PCB
arrangement, connector locations, and functions while Figure 4-4
on the next page shows how the printed circuit boards are
mounted to the support frame.
4-4
TracVision 6 Installation and Technical Manual
Figure 4-2
PCB Cover Plate Removal
PCB Cover
Screws & Washers
Nuts & Washers
From Elevation Motor
From Azimuth Motor
From RFU to CPU Cable
From Cable Wrap
CPU PCB
From Elevation Limit Switch
From Antenna Sensor
From Azimuth Limit Switch
From Cable Wrap
RFU PCB
From LNB
From Cable Wrap
RFU to CPU
The PCB cover fits snugly over the
PCB. When removing or replacing
the cover, take care to ensure that
the cover does not dislodge any of
the Molex connectors as this will
cause system errors and improper
operation.
Figure 4-3
PCB Connector Locations
(Rear View)
