Product Info

Draft 2/8/12
2-8 Viking Portable Radio Service Manual
Battery, Accessory and Disassembly Information
2.4.3 Removing UI (User Interface) Board
1 Separate the front cover and chassis as described in Section 2.4.1. The UI Board is
located inside the front cover as shown below.
2 Unlock the three flex circuits shown above by sliding the tab on each connector
outward. Carefully slide the flex circuits out of the connectors, taking care to minimize
bending which could crack the traces.
3 Remove the two screws shown above. If required, also unsolder the two speaker wires.
4 Carefully lift the bottom end of the UI Board upward (guide the microphone out of its
cavity). Then slide the UI Board out of the radio.
5 When reinstalling the UI Board, the display assembly on the bottom of the board must
slide into the area above the keypad (see following illustration). If the UI Board does
not lie flat against the keypad after it is installed, the display is probably hanging up on
the keypad. Do not force it in place. Reorient the keypad and UI Board as required until
the display slides into place. Also make sure that the optic fiber bundle slides under the
boss on the switch assembly, and the microphone is properly positioned back in its
cavity.
2.4.4 Removing Switch Assembly
6 Separate the front cover and chassis as described in Section 2.4.1. Then remove the UI
Board as described in the preceding section.
Unlock
Remove
Screws
Unsolder
Wires
Flex Circuits
UI Board
MICROPHONE
NEEDS TO BE REPLACED
Display Area
Keypad
NEEDS TO BE REPLACED