Motorola CDM1250 Service Manual

Section 5: 4-1
6881091C63-F
Chapter 4
UHF BAND 1 (403–470 MHZ) 1–25 W PCBS,
SCHEMATICS, AND 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.
Table 5-1 UHF Band 1 1–25 W PCB 8471224L03 Diagrams and Parts Lists
PCB 8471224L03:
Main Board Top Side
Main Board Bottom Side
Page:
5: 4-3
5: 4-4
SCHEMATICS
Power Amplifier 1 – 25 W
FRACN Synthesizer
Voltage Controlled Oscillator
Receiver Front-End
IF
5: 4-5
5: 4-12
5: 4-13
5: 4-14
5: 4-15
Parts List 5: 4-6
Controller version is T9
Table 5-2 UHF Band 1 1–25 W PCB 8485670Z02 Diagrams and Parts Lists
PCB 8485670Z02:
Main Board Top Side
Main Board Bottom Side
Page:
5: 4-9
5: 4-10
SCHEMATICS
Power Amplifier 1 – 25 W
FRACN Synthesizer
Voltage Controlled Oscillator
Receiver Front-End
IF
5: 4-11
5: 4-12
5: 4-13
5: 4-14
5: 4-15
Parts List 5: 4-16
Controller version is T7

Motorola CDM1250 Specifications

General

Display	Alphanumeric
IP Rating	IP54
Frequency Range	VHF: 136-174 MHz, UHF: 403-470 MHz
Signaling	PL, DPL, MDC1200, Quick Call II
Operating Temperature	-22°F to +140°F (-30°C to +60°C)
Power Output	VHF: 1-25W; UHF: 1-25W