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DX-440
Realistic DX-440 Shortwave Radio Manuals
Manuals and User Guides for Realistic DX-440 Shortwave Radio. We have
2
Realistic DX-440 Shortwave Radio manuals available for free PDF download: Service Manual, Owner's Manual
Realistic DX-440 Service Manual (60 pages)
AM/FM direct entry communications receiver
Brand:
Realistic
| Category:
Receiver
| Size: 2.49 MB
Table of Contents
Contents
1
Specifications
2
SW Electrical Performance
2
FM Electrical Performance
2
MW Electrical Performance
3
LW Electrical Performance
3
Disassembly Instruction
4
To Remove Back Cover
4
To Remove PCB A-1 and PCB B
4
To Remove PCB A-2 and PCB C
4
Block Diagram
5
Circuit Description
6
Pin Configuration
6
Keyboard Matrix
6
Liquid Crystal Display (LD-BU7140J)
7
Pin Connection Table
7
IC401-CX-7961 A-1 (Frequency Synthesizer PLL) Block Diagram
8
Control Data Transmitted
9
Reference Divider Frequency Division Number
9
Programmable Divider Frequency Division Number
9
Programmable Divider Frequency Division Number in 20 Bits Chart
10
Reference Divider Frequency Division Number in 20 Bits Chart
10
IC101-Μpc1018C (am if Amp, FM if Amp) Diagram
11
IC102-LA5003 (Regulator) Diagram
11
IC201-LA3361 (FM MPX Demodulator) Diagram
11
IC202-TA7366P (Signal Strength, LED Driver) Diagram
12
IC203-M6900L (Pre-Amp.) Diagram
12
IC301-Μpc 1263C2/Μpc1316C (Poewr Amp.) Diagram
12
Alignment Instruction
13
Alignment for Power Supply VDD
13
Alignment for Clock Time Accuracy
14
Alignment for VC01 Voltage Range
15
Alignment for PLL Frequency
16
Alignment for am 2Nd Local OSC
17
Alignment for am 2Nd if
18
Alignment for FM if
19
Alignment for am Sensitivity
20
Alignment for BFO
21
Alignment for Signal Level and Stop Level
22
Alignment for MPX
23
Alignment for FM Sensitivity
24
Troubleshooting Flow Chart
25
Scan Auto Stop Does Not Work
25
Weak Sensitivity on FM Mode
25
Power Can Not be Turned on
26
PLL Does Not Work
26
Weak Sensitivity in am Band
27
Wiring Diagram - Solder Side
28
PCB-A1 Top View Diagram
29
PCB-A1 Bottom View Diagram
29
PCB-A2 & A3 Top View Diagram
31
PCB-A2 & A3 Bottom View Diagram
32
PCB-C Top View Diagram
33
PCB-B Top View Diagram
33
PCB-B Bottom View Diagram
34
PCB-C Bottom View Diagram
34
Exploded View
35
Parts List for Exploded View
36
Before Electrical Parts List
38
Electrical Parts List
39
Table of ICS' & Transistors' Voltage List
52
Transistors
56
Semiconductor Lead Identifications
58
Schematic Diagram
59
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Realistic DX-440 Owner's Manual (28 pages)
am/fm direct entry communications receiver
Brand:
Realistic
| Category:
Receiver
| Size: 0.83 MB
Table of Contents
Table of Contents
2
Features
3
Control Locations
3
Choosing a Power Supply
4
Preliminary Settings
6
Tuning the Radio
7
Clock Radio Operation
12
Special Tuning Techniques and Controls
14
Special SSB/CW Reception Techniques
15
Using the Shoulder Strap
17
Choosing an Antenna
18
System Grounding
19
The Shortwave Hooby
20
Listening Notes
21
Frequency Conversion
21
Care and Maintenance
25
Specifications
26
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