Contents
Service Manual
ii
7.1.1 RF Power Amplifier Circuit..................................................................................................32
7.1.2 Low-pass Filter Circuit ........................................................................................................33
7.1.3 Auto Power Control Circuit..................................................................................................33
7.2 Receiver Circuit.............................................................................................................................33
7.2.1 Receiver Front-end .............................................................................................................34
7.2.2 Receiver Back-end .............................................................................................................35
7.3 Frequency Generation Unit (FGU) ................................................................................................35
7.3.1 Working Principle of PLL.....................................................................................................36
7.3.2 Working Principle of VCO ...................................................................................................37
7.3.3 Two-point Modulation..........................................................................................................37
7.4 PCB View......................................................................................................................................38
7.5 Block Diagram ..............................................................................................................................46
7.6 Schematic Diagram.......................................................................................................................49
7.7 Parts List.......................................................................................................................................65
7.8 Troubleshooting Flow Chart........................................................................................................115
8. UHF2 (450-520MHz) Information ...................................................................................................121
8.1 Transmitter Circuit.......................................................................................................................121
8.1.1 RF Power Amplifier Circuit................................................................................................121
8.1.2 Low-pass Filter Circuit ......................................................................................................122
8.1.3 Auto Power Control Circuit................................................................................................122
8.2 Receiver Circuit...........................................................................................................................122
8.2.1 Receiver Front-end ...........................................................................................................123
8.2.2 Receiver Back-end ...........................................................................................................124
8.3 Frequency Generation Unit (FGU) ..............................................................................................124
8.3.1 Working Principle of PLL...................................................................................................125
8.3.3 Two-point Modulation........................................................................................................126
8.4 PCB View....................................................................................................................................127
8.5 Block Diagram ............................................................................................................................135
8.6 Schematic Diagram.....................................................................................................................138
8.7 Parts List.....................................................................................................................................154
8.8 Troubleshooting Flow Chart........................................................................................................205
9. UHF3 (350-400MHz) Information ...................................................................................................211
9.1 Transmitter Circuit.......................................................................................................................211
9.1.1 RF Power Amplifier Circuit................................................................................................211
9.1.2 Low-pass Filter Circuit ......................................................................................................212
9.1.3 Auto Power Control Circuit................................................................................................212
9.2 Receiver Circuit...........................................................................................................................212
Содержание PD70X Series
Страница 1: ......
Страница 9: ...Figures Service Manual vi Figure 11 3 Diagram of IF Processor 399 Figure 11 4 Diagram of FGU 400 ...
Страница 18: ...Baseband Section Service Manual 8 Figure 3 3 Diagram of OMAP5912 Figure 3 4 Diagram of Overall Scheme ...
Страница 48: ...PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G PCB View Main Board Top Layer 38 7 4 PCB View ...
Страница 49: ...PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G PCB View Main Board Bottom Layer 39 ...
Страница 50: ...PD70X PD70XG HD705 HD705G PCB View Channel Board Top Layer 40 ...
Страница 51: ...PD70X PD70XG HD705 HD705G PCB View Channel Board Bottom Layer 41 ...
Страница 52: ...PD78X PD78XG HD785 HD785G PCB View Channel Board Top Layer 42 ...
Страница 53: ...PD78X PD78XG HD785 HD785G PCB View Channel Board Bottom Layer 43 ...
Страница 54: ...PD78X PD78XG HD785 HD785G PCB View Keyboard Top Layer 44 ...
Страница 55: ...PD78X PD78XG HD785 HD785G PCB View Keyboard Bottom Layer 45 ...
Страница 57: ...PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G Block Diagram Baseband Section 47 ...
Страница 127: ...Service Manual UHF1 400 470MHz Information 117 Transmitter Circuit ...
Страница 137: ...PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G PCB View Main Board Top Layer 127 8 4 PCB View ...
Страница 138: ...PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G PCB View Main Board Bottom Layer 128 ...
Страница 139: ...PD70X PD70XG HD705 HD705G PCB View Channel Board Top Layer 129 ...
Страница 140: ...PD70X PD70XG HD705 HD705G PCB View Channel Board Bottom Layer 130 ...
Страница 141: ...PD78X PD78XG HD785 HD785G PCB View Channel Board Top Layer 131 ...
Страница 142: ...PD78X PD78XG HD785 HD785G PCB View Channel Board Bottom Layer 132 ...
Страница 143: ...PD78X PD78XG HD785 HD785G PCB View Keyboard Top Layer 133 ...
Страница 144: ...PD78X PD78XG HD785 HD785G PCB View Keyboard Bottom Layer 134 ...
Страница 146: ...PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G Block Diagram Baseband Section 136 ...
Страница 217: ...Service Manual UHF2 450 520MHz Information 207 Transmitter Circuit ...
Страница 227: ...PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G PCB View Main Board Top Layer 217 9 4 PCB View ...
Страница 228: ...PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G PCB View Main Board Bottom Layer 218 ...
Страница 229: ...PD70X PD70XG HD705 HD705G PCB View Channel Board Top Layer 219 ...
Страница 230: ...PD70X PD70XG HD705 HD705G PCB View Channel Board Bottom Layer 220 ...
Страница 231: ...PD78X PD78XG HD785 HD785G PCB View Channel Board Top Layer 221 ...
Страница 232: ...PD78X PD78XG HD785 HD785G PCB View Channel Board Bottom Layer 222 ...
Страница 233: ...PD78X PD78XG HD785 HD785G PCB View Keyboard Top Layer 223 ...
Страница 234: ...PD78X PD78XG HD785 HD785G PCB View Keyboard Bottom Layer 224 ...
Страница 236: ...PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G Block Diagram Baseband Section 226 ...
Страница 307: ...Service Manual UHF3 350 400MHz Information 297 Transmitter Circuit ...
Страница 317: ...10 4 PCB View PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G PCB View Main Board Top Layer 307 ...
Страница 318: ...PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G PCB View Main Board Bottom Layer 308 ...
Страница 319: ...PD70X PD70XG HD705 HD705G PCB View Channel Board Top Layer 309 ...
Страница 320: ...PD70X PD70XG HD705 HD705G PCB View Channel Board Bottom Layer 310 ...
Страница 321: ...PD78X PD78XG HD785 HD785G PCB View Channel Board Top Layer 311 ...
Страница 322: ...PD78X PD78XG HD785 HD785G PCB View Channel Board Bottom Layer 312 ...
Страница 323: ...PD78X PD78XG HD785 HD785G PCB View Keyboard Top Layer 313 ...
Страница 324: ...PD78X PD78XG HD785 HD785G PCB View Keyboard Bottom Layer 314 ...
Страница 326: ...PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G Block Diagram Baseband Section 316 ...
Страница 397: ...Service Manual UHF5 806 941MHz Information 387 No Ref No Part No Description 17 R7 3001051010000 100Ω ...
Страница 398: ...UHF5 806 941MHz Information Service Manual 388 10 8 Troubleshooting Flow Chart Receiver Circuit ...
Страница 401: ...Service Manual UHF5 806 941MHz Information 391 Transmitter Circuit ...
Страница 412: ...11 4 PCB View PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G PCB View Main Board Top Layer 402 ...
Страница 413: ...PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G PCB View Main Board Bottom Layer 403 ...
Страница 414: ...PD70X PD70XG HD705 HD705G PCB View Channel Board Top Layer 404 ...
Страница 415: ...PD70X PD70XG HD705 HD705G PCB View Channel Board Bottom Layer 405 ...
Страница 416: ...PD78X PD78XG HD785 HD785G PCB View Channel Board Top Layer 406 ...
Страница 417: ...PD78X PD78XG HD785 HD785G PCB View Channel Board Bottom Layer 407 ...
Страница 418: ...PD78X PD78XG HD785 HD785G PCB View Keyboard Top Layer 408 ...
Страница 419: ...PD78X PD78XG HD785 HD785G PCB View Keyboard Bottom Layer 409 ...
Страница 421: ...PD70X PD70XG PD78X PD78XG HD705 HD705G HD785 HD785G Block Diagram Baseband Section 411 ...
Страница 492: ...VHF 136 174MHz Information Service Manual 482 11 8 Troubleshooting Flow Chart Receiver Circuit ...
Страница 494: ...VHF 136 174MHz Information Service Manual 484 Transmitter Circuit ...
Страница 506: ...Packing Guide Service Manual 496 14 Packing Guide This section takes PD78X PD78XG HD785 HD785G for example ...