Radio Shack 19-1125 Mobile Transceiver Manuals

Manuals and User Guides for Radio Shack 19-1125 Mobile Transceiver. We have 2 Radio Shack 19-1125 Mobile Transceiver manuals available for free PDF download: Service Manual, Owner's Manual

Radio Shack 19-1125 Service Manual (72 pages)

2-meter amateur vhf-fm ham transceiver

Brand: Radio Shack | Category: Transceiver | Size: 3 MB

Contents
1
Specifications
2
Block Diagram
5
Theory of Operation
9
Transmitter
9
Microphone Audio Circuit
9
Transmitter Stage and Harmonic Filter
9
RX and TX Voltage Controlled Oscillator Module
10
RX and TX Power Line Filter
10
Rx Vco
10
Tx Vco
10
Receiver
11
Out of Lock Detector
11
RF Amplifier
11
First Mixer and First if Amplifier
11
High Pass Filter
12
Audio Amplifier
12
Mute Circuit
12
Microprocessor
12
CTCSS Transmit
13
DTMF Decoding Circuit
13
DTMF Encoding Circuit
13
Channel Select Circuit
13
Alignment and Adjustment
14
Alignment Test Points and Parts Locations
14
RF Board
14
Digital Board
14
Phase Locked Loop and CPU Section
15
Test Equipment Required
15
General Alignment Procedure
15
Transmitter Section
16
Receiver Section
18
Troubleshooting
19
Error Display
20
Internal RAM Error
20
PLL Unlock Error
20
PLL Alignment
20
Printed Circuit Board
21
Rf Pcb
21
Digital PCB
23
Microphone PCB
25
Vco Pcb
25
Top View
25
Bottom View
25
Wiring Diagram
26
Exploded View
27
Exploded View Parts List
28
Main Set
28
Electrical Parts List
30
Semiconductor Lead Identification and IC Internal Diagrams
47
Pin Connection
51
Equivalent Circuit
51
Semiconductor Voltage Chart
58
Transistors
58
IC's
59
At Tone Squelch Function
62
At DTMF Squelch Function
63
RF Schematic
65
Microphone Schematic
69

Radio Shack 19-1125 Owner's Manual (44 pages)

Two-Meter Mobile Transceiver

Brand: Radio Shack | Category: Transceiver | Size: 0 MB

Table of Contents
4
Installation
6
Understanding the Htx-212
13
- Dual VFO Modes
  13
- DTMF (Touch-Tone) Features
  13
- Subaudible Tone (CTCSS) Features
  14
- Repeater Operation
  14
- Memory Channels
  14
- Understanding the Display
  15
Basic Operation
17
- Turning On/Off Your HTX-212
  17
- Resetting the HTX-212
  17
- Extending the Transmit Frequency Range
  17
- Setting Volume and Squelch
  18
- Using the Light
  18
- Setting the Power Level
  18
- Locking the Controls
  19
- Selecting a Frequency
  19
- Setting the Frequency Step
  21
- Setting the Scan Options
  21
- Receiving Transmissions
  23
- Transmitting
  24
  - Transmitting DTMF Tones
    24
  - Limiting Transmit Duration
    25
- Turning the Keytone Beep on and off
  25
Advanced Operation
26
- Frequency Offset Defaults
  26
- Using the Dual Vfos for Duplex Operation
  27
Using Memory Channels
28
- Using the Calling-Frequency Memory
  28
- Using the Standard Memory Channels
  29
  - Storing a Frequency
    29
  - Changing Stored Settings
    29
  - Tuning to a Memory Channel
    30
  - Checking Priority Channel 1
    30
  - Scanning Memory Channels
    30
  - Clearing a Memory Channel
    30
Using Dtmf and Subaudible Tones
31
- Storing a DTMF Sequence
  31
- Transmitting a DTMF Sequence
  31
- Using DTMF Page
  32
  - Using Group Calling
    32
  - Using Auto-Reply
    33
- Using Subaudible Tones
  33
- Setting the DTMF Page and Subaudible Tone Alert
  34
Using the Menu
35
Troubleshooting
36
- Error Codes
  36
- Common Problems and Solutions
  36
- Replacing the Fuse
  37
Specifications
38
- General
  38
- Receiver
  38
- Transmitter
  39
Schematics
40

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Radio Shack 19-1125 Mobile Transceiver Manuals

Radio Shack 19-1125 Service Manual (72 pages)

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Radio Shack 19-1125 Owner's Manual (44 pages)

Table of Contents

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