Motorola pro7100 Manuel de service télécharger pdf (Page 67)

4-1

Chapter 4

Schematic Diagrams, Overlays, and Parts Lists

4.1 Introduction

This chapter provides schematic diagrams, overlays, and parts lists for the radio circuit boards and

interface connections.

4.1.1 Notes For All Schematics and Circuit Boards

* Component is frequency sensitive. Refer to the Electrical Parts List for value and usage.

Unless otherwise stated, resistances are in Ohms (k = 1000), and capacitances are in picofarads

(pF) or microfarads (µF).

DC voltages are measured from point indicated to chassis ground using a Motorola DC multime-

ter or equivalent. Transmitter measurements should be made with a 1.2 µH choke in series with

the voltage probe to prevent circuit loading.

Reference Designators are assigned in the following manner:

800-900 = Control Heads

100/200/400/500/600 Series = Controller

100/200/400/500/600/3000/4000 Series = UHF Transmitter

3000 Series = VHF Transmitter

Interconnect Tie Point Legend:

UNSWB+ = Unswitched Battery Voltage (12V)

SWB+ = Switched Battery Voltage (12V)

R5 = Receiver Five Volts

CLK = Clock

Vdda = Regulated 5 Volts (for analog)

Vddd = Regulated 5 Volts (for digital)

CSX = Chip Select Line (not for LVZIF)

SYN = Synthesizer

DACRX = Digital to Analog Voltage (For Receiver Front End Filter)

VSF = Voltage Super Filtered (5 volts)

VR = Voltage Regulator

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Motorola pro7100 Manuel de service Page 67