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HYT Manuals
Two-Way Radio
POWER446
Service manual
Table Of Contents - HYT POWER446 Service Manual
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
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Table of Contents
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Table of Contents
Table Of Contents
2
Revision History
3
Copyright Information
3
Disclaimer
3
Product Overview
4
Intended User
4
Product Controls
5
Software Specifications
6
Description Of Modes
6
User Mode
6
Pc Programming Mode
6
Manual Tune Mode
7
Description Of Tuning
7
To Switch Between Tx Tuning Items And Rx Tuning Items
7
To Switch Between Tuning Items Within Tx Group/Rx Group
7
To Switch Within Narrow Bands
8
To Tune The Value
8
About Several Special Items
8
About The Key-Press
8
Circuit Description
9
1 Pll Frequency Synthesizer
9
Vco
9
Rf Power Amplifier Circuit (Tx Section)
10
Rx Amplifier And Mixer Circuit (Rx Section)
10
Low-Noise Amplifier And Bandpass Filter Circuit
10
Mixer And If Bandpass Filter Circuit
11
Automatic Power Control Circuit
11
Audio And Signaling Processing Circuit
12
Tx Audio & Signaling Process
12
Tx Audio Processing
12
Rx Audio & Signaling Process
13
Rx Audio Processing
13
Rx Signaling Processing
13
Noise Signal Processing
13
Mcu Control Section
14
Signal Control
14
Signal Detect
14
Data Transfer And Process
14
Power Supply Processing
15
Vox Realization Circuit
16
Cpu Pins
17
Parts List 1
21
Tuning Description
36
Required Test Instruments
36
Preparation
36
Tuning Procedures
36
Specific Operations And Requirements
37
Tuning Outside The Mode
37
Tuning In The Mode
39
Reference Value For Source Radio
43
Troubleshooting Flow Chart
44
Tx Circuit
44
Rx Circuit
45
Mcu
46
Disassembly And Assembly
47
Disassembling The Aluminum Chassis
47
Assembling The Aluminum Chassis
48
Exploded View
49
Parts List 2
50
Packing Guide
52
Power446 Pcb View
53
Top Layer
53
Bottom Layer
54
Power446 Level Diagram
55
Tx Part
55
Rx Part
55
Power446 Block Diagram
56
Power446 Schematic Diagram (Af&If&Pll)
57
Power446 Schematic Diagram (Mcu&Power)
58
Power446 Schematic Diagram (Vco&Rf)
59
Specifications
60
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