Chapter 1
THEORY OF OPERATION
1.0
Keypad and Flexible Connectors
1.1
Keypad
The keypad block diagram is shown in Figure 1-1. U602 is a comparator that will compare the
voltage when any one of the keypad row or keypad column keys is being pressed. Therefore when a
key is being pressed, it will send a message to the microprocessor through the output (KEY_INT)
telling it that a key has been pressed. The microprocessor then sample the analog to digital voltages
at the keypad row and keypad column and map it with a table so that the key pressed being can be
identified. Once the key has been identified, the message that corresponds to the key will show up
at the display.
The LED_EN setting is set by the codeplug. When the value is set to high, the LED does not light up
during power up and vice versa.
Figure 1-1
Keypad Block Diagram
1.2
Flexible Connectors
Flexible ribbon circuits (flexes) are used to connect the keypad and radio front panel components
with the circuit boards. The flexes are locked into place in their connectors by latches which must be
released before the flexes may be disconnected during maintenence disassembly.
Two types of flexible ribbon circuits are used in the radios:
■
Keypad/Controller Interconnect flex - used for connecting the keypad with the main board
circuits.
■
Universal Flex connector - used to make connections to the Speaker, Microphone and
accessory connector.
40 pin connector
Comparator
Keypad
Button
LED
Di
splay
1
8
pin con
nector
Key_Int
Keypad Column
Keypad
Data
Row
Содержание GP series
Страница 1: ...Professional Portable Radio Detailed Service Manual 6866558D03 P ...
Страница 2: ...ii ...
Страница 5: ...Professional Radio GP Series Service Maintainability Issue July 2007 ...
Страница 14: ...x THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 16: ...xii THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 26: ...2 6 MAINTENANCE THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 32: ...4 2 Error Codes Notes ...
Страница 33: ...Professional Radio GP Series Keypad and Flex Service Information Issue July 2007 ...
Страница 36: ...iv THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 40: ...1 4 THEORY OF OPERATION THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 48: ...2 8 PCB Schematic Diagrams and Parts List Flexes THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 52: ...2 12 PCB Schematic Diagrams and Parts List Keypad THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 56: ...2 16 PCB Schematic Diagrams and Parts List Keypad THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 59: ...Professional Radio GP Series Power Distribution and Controller Service Information Issue July 2007 ...
Страница 62: ...iv THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 72: ...3 4 CONTROLLER SCHEMATICS THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 92: ...3 24 Controller Set 3 PCB 8486458Z03 UHF 8486686Z02 UHF2 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 98: ...3 30 Controller Set 4 PCB 8416256H02 UHF Controller Audio Power Amplifier Schematic Diagram ...
Страница 100: ...3 32 Controller Set 5 PCB 8486743Z02 UHF Intentionally left blank Controller ASFIC ON_OFF Schematic Diagram ...
Страница 101: ...Controller Set 5 PCB 8486743Z02 UHF 3 33 Controller Micro Processor Schematic Diagram ...
Страница 102: ...3 34 Controller Set 5 PCB 8486743Z02 UHF Controller Interface Schematic Diagram ...
Страница 103: ...Controller Set 5 PCB 8486743Z02 UHF 3 35 Controller Audio Power Amplifier Schematic Diagram ...
Страница 104: ...3 36 Controller Set 5 PCB 8486743Z02 UHF THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 108: ...3 40 Controller Schematics Set 6 PCB 8415234H05 Narrow Band THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 109: ...Professional Radio GP Series UHF 403 470MHz Narrow Band 450 470MHz Service Information Issue July 2007 ...
Страница 134: ...1 22 THEORY OF OPERATION THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 150: ...3 6 UHF PCB SCHEMATICS PARTS LISTS THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 160: ...3 16 UHF PCB 8480450Z03 Schematics THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 178: ...3 34 UHF PCB 8480587Z03 Schematics THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 182: ...3 38 UHF PCB 8480587Z03 Parts List THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 190: ...3 46 UHF PCB 8480587Z05 Parts List THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 200: ...3 56 UHF PCB 8480450Z13 14 Schematics THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 214: ...3 70 UHF PCB 8486458Z03 Schematics THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 228: ...3 84 UHF PCB 8415234H01 Schematics THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 244: ...3 100 UHF PCB 8415234H02 Schematics THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 250: ...3 106 UHF PCB 8415234H02 Parts List THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 260: ...3 116 Circuit Board Schematic Diagrams and Parts List PCB No 8415234H05 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 270: ...3 126 UHF PCB 8415234H05 EPP Parts List THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 280: ...3 136 UHF PCB 8415234H08 Schematics THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 290: ...3 146 UHF PCB 8415234H08 Parts List THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 293: ...UHF PCB 8486743Z02 Schematics 3 149 UHF 403 470 MHz Receiver Front End Schematic Diagram ...
Страница 294: ...3 150 UHF PCB 8486743Z02 Schematics UHF 403 470 MHz Receiver Back End Schematic Diagram ...
Страница 295: ...UHF PCB 8486743Z02 Schematics 3 151 UHF 403 470 MHz Synthesizer Schematic Diagram ...
Страница 296: ...3 152 UHF PCB 8486743Z02 Schematics UHF 403 470 MHz Voltage Controlled Oscillator Schematic Diagram ...
Страница 297: ...UHF PCB 8486743Z02 Schematics 3 153 UHF 403 470 MHz Transmitter Schematic Diagram ...
Страница 298: ...3 154 UHF PCB 8486743Z02 Schematics THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 316: ...3 172 UHF PCB 8415234H05 450 470 MHz Narrow Band THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 325: ...Professional Radio GP Series UHF2 450 527MHz Service Information Issue July 2007 ...
Страница 342: ...1 14 THEORY OF OPERATION THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 352: ...2 10 TROUBLESHOOTING CHARTS THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 356: ...3 4 UHF2 PCB SCHEMATICS PARTS LISTS THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 384: ...3 32 UHF2 PCB 8485677Z02 GP1280 Schematics THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 386: ...3 34 Voice Storage Parts List GP1280 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 394: ...3 42 UHF2 PCB 8485677Z03 GP1280 Parts List THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 404: ...3 52 UHF2 PCB 8486686Z02 Schematics THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 441: ...Professional Radio GP Series 800 MHz 806 870MHz Service Information Issue July 2007 ...
Страница 444: ...iv THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 456: ...1 12 THEORY OF OPERATION THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 464: ...3 2 800MHz PCB schematics Parts list THIS PAGE INTENTIONALLY LEFT BLANK ...