Ranger RCI-2950 Service Manual

RCI 2950 Service Manual
Table of Contents
● Specifications
● Controls and Connections
● Basic Programming Procedures
● Technical Analysis of the circuits
● Transistors Voltage Chart
● RCI SECRETS
● REPAIR TRICKS
DIAGRAMS
● Main PCB Schematic Diagram
● CPU PCB Schematic Diagram
● Chassis Exploded View Drawing
● Inter-connection Diagram
PCB Layouts and Parts
● (EPT295013Z)
● Main PCB Parts Layout Top View
● Main PCB Copper Side View
● LCD PCB (EPT295021Z)
● CPU PCB (EPT295043Z)
● MIC UP/DW (EPT295080Z)
● MIC Jack PCB (EPT295070Z)
● SWR PCB (EPT360040Z)
● VR (A) PCB RF/MIC VOL/SQ (EPT295050Z)
● VR (B) PCB RF/CAL (EPT295060Z)
● CH / Switch PCB (EPT295090A)
● MODE PCB (EPT295090Z)
● Push Button Switch PCB (EPT295031Z)
PARTS LISTS
● Capacitors
● Coils, Transformers, Crystals, Filters
● Resistors
● IC's, Transistors
● Diodes
● Wire, Jumpers, Connectors
● Chassis, Miscellaneous & Mechanical Parts
RADIO MODIFICATIONS
● MODIFY FOR 26 Mhz -32 Mhz
● MODIFY FOR 25 Mhz -33 Mhz
● Ham to CB Mode Modification
● INCREASE YOUR POWER ! !
● HEAVY SWINGER Mod (Modulation)
● TUNE UP/MOD
● Upgrading AM detection
● INCREASE AUDIO
● Add an Automatic SQUELCH
● BATTERY PROBLEMS
● CLARIFIER MOD
● CAR'S LIGHTER Install
● LCD & LEDS
● MIKE Wiring
● Protect From Polarity Inversions
● MOD FOR FASTER SCAN SPEED
● EXTERNAL S-METER
● TALK BACK MODIFICATION
● TONE MODIFICATION
ALIGNMENT PROCEDURES
● TX Alignment
● TX Alignment Locations
● RX Alignment
● RX Alignment Locations
● PLL Alignment
● PLL Alignment Locations
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Ranger RCI-2950 Specifications

General

Display	LCD
Microphone	Dynamic
Weight	5 lbs
Microphone Impedance	600 ohms
Input Voltage	13.8 VDC
Antenna Impedance	50 ohms
Frequency Range	28.000 - 29.700 MHz
Modes	AM, FM, USB, LSB, CW
Power Supply	13.8V DC

Summary

RCI-2950 Specifications

Key Features Overview

Summary of the radio's main operational features and capabilities.

General, Transmitter, and Receiver Specs

Detailed technical specifications for the unit's general, transmit, and receive functions.

Controls and Connections

Introduction to Operating Procedures

Explains basic operating procedures for the amateur mobile transceiver.

Front Panel Controls and Ports

Detailed description of each control, button, display, and connection port.

Basic Programming Procedures

Frequency Selection Methods

Describes three distinct methods for selecting operating frequencies.

Frequency and Memory Scanning

Procedures for scanning frequencies and programmed memory channels.

Offset Frequency Operation

How to program and use the split frequency feature for repeater use.

Technical Analysis of Circuitry

Frequency Synthesizer and Transmit Circuit Analysis

Analysis of the frequency synthesizer, transmit mixer, filters, and amplifier stages.

Receiver Circuit Analysis

Details on the superheterodyne receiver stages, including IF conversions and filters.

Transistor Voltage Chart

Transistor Voltage Readings by Mode

Table showing voltage readings for transistors in various modes (RX/TX).

Repair Tricks and Common Faults

Front End Protection and Frequency Selection Troubleshooting

Troubleshooting common issues like diode failures and frequency selection problems.

Common Operational Faults and Solutions

Identifies frequent problems such as battery drain and regulator issues.

Schematic Diagrams

Main PCB Schematic

Complete schematic diagram of the main printed circuit board.

CPU PCB Schematic

Schematic diagram for the central processing unit printed circuit board.

Chassis Exploded View and Inter-connection Diagram

Visual layout of chassis parts and how major boards connect.

PCB Layouts

LCD PCB (EPT2950217) Layout

Trace layout for the LCD display PCB.

CPU PCB (EPT295043Z) Layout

Trace layout for the CPU PCB.

Microphone Related PCBs Layouts

Layouts for the MIC UP/DW and MIC Jack PCBs.

Other PCBs Layouts

Layouts for VSWR, VR, CH/SW, MODE, and Push Button PCBs.

Parts Lists

Main PCB Capacitors

Detailed list of capacitors for the main PCB.

Main PCB Coils, Transformers, Crystals, Filters

List of inductive and filtering components for the main PCB.

Main PCB Resistors

List of variable and fixed resistors for the main PCB.

Main PCB Integrated Circuits, Transistors, Diodes

List of integrated circuits, transistors, and diodes for the main PCB.

Main PCB Wire, Jumpers, Connectors, Chassis Parts

List of wiring, connectors, chassis, and miscellaneous parts.

Radio Modifications

Frequency Range Expansion Mod

Modifying the radio for operation between 26 MHz and 32 MHz.

Mode and Channel Modifications

Enabling HAM/CB modes and adding a Channel 9 emergency key.

Power and Audio Enhancements

Modifications to increase output power and improve audio quality.

Performance Tuning and Squelch Mods

Adjustments for performance, AM detection, and adding automatic squelch.

Battery Management and Clarifier Mod

Solutions for battery issues and unlocking the clarifier function.

Feature Enhancements (LCD, Mic, Scan, Talkback)

Mods for LCD backlight, microphone wiring, scan speed, and talk-back.

Protection and Miscellaneous Modifications

Mods for polarity protection, external S-meter, and tone capability.

Alignment Procedures

Transmitter (TX) Alignment

Step-by-step guide for aligning transmitter functions.

TX Alignment Locations

Visual reference showing adjustment points on the PCB for TX alignment.

Receiver (RX) Alignment

Step-by-step guide for aligning receiver functions.

RX Alignment Locations

Visual reference showing adjustment points on the PCB for RX alignment.

PLL Alignment

Step-by-step guide for aligning the Phase-Locked Loop circuit.

PLL Alignment Locations

Visual reference showing adjustment points on the PCB for PLL alignment.