Chapter 3
UHF PCB/SCHEMATICS/PARTS LISTS
1.0 Allocation of Schematics and Circuit Boards
1.1 Controller Circuits
The UHF circuits are contained on the printed circuit board (PCB) which also contains the Controller
circuits. This Chapter shows the schematics for the UHF circuits only, refer to the Controller section
for details of the related Controller circuits.The PCB component layouts and the Parts Lists in this
Chapter show both the Controller and UHF circuit components. The UHF schematics and the
related PCB and parts list are shown in the tables below.
1.2 Voice Storage Facility
The Voice Storage facility is fitted to the GP1280 radio as standard and the schematics, component
layout and parts list for these circuits are shown in this Chapter. The Voice Storage facility may be
fitted to other radios in the GP Series as an option board; reference must be made to the Option
Board manual in this case. The Voice Storage schematic and the related PCBs are shown in Tables
3-2, 3-3 and 3-4 below.
Table 3-1 UHF Diagrams and Parts Lists
PCB : 8480450Z03
Main Board Top Side
Main Board Bottom Side
Page 3-7
Page 3-8
SCHEMATICS
Controls and Switches
Receiver Front End
Receiver Back End
Synthesizer
Voltage Controlled Oscillator
Transmitter
Voice Storage Circuits
Page 3-9
Page 3-10
Page 3-11
Page 3-12
Page 3-13
Page 3-14
Page 3-15
Parts List Page 3-17
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