Motorola Portable Radio Ep450 Detailled Hkln4216c Manual

Table of Contentsix
HKLN4216CJune, 2005
Chapter 13 UHF 465-495 MHz 8486634Z02-O Schematic Diagrams,
Overlays, and Parts Lists ............................................... 13-41
Figure 13-31. UHF (465-495 MHz) 8486634Z02-O Radio Circuit Block Diagram .............................. 13-41
Figure 13-32. UHF (465-495 MHz) 8486634Z02-O Receiver Front End Schematic Diagram ........... 13-42
Figure 13-33. UHF (465-495 MHz) 8486634Z02-O Receiver Back End Schematic Diagram ............ 13-43
Figure 13-34. UHF...

xTable of Contents
June, 2005HKLN4216C
List of Figures
Figure 1-1. Programming/Test Cable.................................................................................................. 1-4
Figure 1-2. Wiring of the Connectors .................................................................................................. 1-4
Figure 2-1. DC Power Distribution Block Diagram .............................................................................. 2-1
Figure 4-1. VHF Receiver Block Diagram...

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HKLN4216CJune, 2005
Figure 7-33. VHF (146-174 MHz) 8486342Z13-C Receiver Back End Schematic Diagram .............. 7-43
Figure 7-34. VHF (146-174 MHz) 8486342Z13-C Synthesizer Schematic Diagram .......................... 7-44
Figure 7-35. VHF (146-174 MHz) 8486342Z13-C Voltage Controlled Oscillator Schematic Diagram 7-45
Figure 7-36. VHF (146-174 MHz) 8486342Z13-C Transmitter and Power Control Schematic 
Diagram...

xiiTable of Contents
June, 2005HKLN4216C
Figure 13-2. Speaker and Microphone Schematic.............................................................................. 13-3
Figure 13-3. UHF (403-440 MHz) 8486635Z03-O Radio Circuit Block Diagram ................................ 13-5
Figure 13-4. UHF (403-440 MHz) 8486635Z03-O Receiver Front End Schematic Diagram.............. 13-6
Figure 13-5. UHF (403-440 MHz) 8486635Z03-O Receiver Back End Schematic Diagram .............. 13-7
Figure 13-6. UHF (403-440...

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HKLN4216CJune, 2005
Figure 13-50. UHF (490-527 MHz) 8486768Z02-A Transmitter and Power Control Schematic 
Diagram ........................................................................................................................13-64
Figure 13-51. UHF (490-527 MHz) 8486768Z02-A Controller Interconnect Schematic Diagram ...... 13-65
Figure 13-52. UHF (490-527 MHz) 8486768Z02-A Microprocessor Circuitry Schematic Diagram .... 13-66
Figure 13-53. UHF (490-527 MHz) 8486768Z02-A...

xivTable of Contents
June, 2005HKLN4216C
List of Tables
Table 1-1. Recommended Test Equipment ....................................................................................... 1-1
Table 1-2. Service Aids...................................................................................................................... 1-2
Table 1-3. Recommended Service Tools .......................................................................................... 1-2
Table 2-1. Voltage Regulators...

Chapter 1 Test Equipment, Service Aids, and 
Service Tools
1.1 Test Equipment
Table 1-1 lists test equipment required to service the EP450 Radios.
Table 1-1.  Recommended Test Equipment 
Motorola Part No. Description Characteristics Application
R2600 seriesSystem analyzerThis item will substitute for 
items with an asterisk (*)Frequency/deviation meter and 
signal generator for wide-range 
troubleshooting and alignment
*R1074 Fluke 87 digital multi-
meterTrue RMS metering, 
200 kHz frequency 
counter,...

June, 2005HKLN4216C
1-2Test Equipment, Service Aids, and Service Tools: Service Aids
1.2 Service Aids
Ta b l e  1 - 2 lists service aids recommended for working on the EP450 Radios. While all of these items 
are available from Motorola, most are standard shop equipment items, and any equivalent item 
capable of the same performance may be substituted for the item listed.
Table 1-2.  Service Aids 
Motorola Part 
No.Description Application
RLN4460Po r ta ble  Tes t Se tEnables connection to the...

HKLN4216CJune, 2005
Test Equipment, Service Aids, and Service Tools: Service Aids 1-3
RLN4062 Hot air workstation, 120 V Tool for hot air soldering/desoldering of surface 
mounted integrated circuits
0180386A78Illuminated magnifying glass with 
lens attachment
Illumination and magnification of components
0180302E51 Master lens system
0180386A82Anti-static grounding kitUsed during all radio assembly and disassembly pro-
cedures
6684253C72 Straight prober
6680384A98Brush
1010041A86 Solder (RMA type),...

June, 2005HKLN4216C
1-4Test Equipment, Service Aids, and Service Tools: Service Aids
Programming/Test Cable
Figure 1-1.  Programming/Test Cable
Figure 1-2.  Wiring of the Connectors
25 POSITION
FEMALE CONNECTOR 25 POSITION
MALE CONNECTOR
36.0”
CABLE
36.0”
CABLE
P1 P2 P3
P2
25 pin Male D Connector
Components molded inside
1
5
24
7
20
8
15
16
9
47
ohm
33K
+
1UF,16V 5% Orange
Blue
White
Spiral
Yellow
P1
2.5mm stereo and
3.5mm
1
2
5
3
4
3.5mm Tip
(Speaker +)
3.5mm
Sleeve
2.5mm Tip
(Microphone)
2.5mm
2.5mm...