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After Sales
Technical Documentation
RAE/RAK–1N
Faultfinding/Disassembly
Page 8 – 20
Original, 05/97
1.3.1
Reset OK?
The PWRGOOD signal, coming from the PDA power unit, should go from
low to high after 140ms when VBatt is connected. If this signal is not
functioning as expected, then disconnect the signal either from the CPU
(D130) or the Reset IC (D80), and isolate the problem to the power unit or
to the CPU.
If this signal rises too fast, or the signal levels are illegal, then check the
power unit. If the signal is OK, but there’s no bus activity at all, then
suspect a CPU fault, see 1.3.1.1
1.3.1.1
CPU Fault
If the PLL is running properly and the CPU gets the RESET signal from
the power unit (PWRGOOD), but there is no bus activity at all, then it is
likely that the CPU is not functioning properly.
If the PLL circuitry surrounding the CPU is OK, but the PLLDIV24 is not,
then it is likely that the CPU is defective.
It is possible that PLLDIV24 is OK as well as RESET but no activity is
detected on CPU address lines. Before you replace the CPU it is
reasonable to check that circuitry around the HPLLI (R137, C153, C154)
and IREFH (R139) is OK. It is hard to measure these signals so a visual
check is usually all that can be done. If no defect can be found, suspect a
defective CPU chip.
If the device beeps during POST CPU related error beeps, then it’s likely
that the CPU is defective.
Содержание 9000i
Страница 7: ...After Sales Technical Documentation RAE RAK 1N Series Original 08 96 Chapter 1 Overview ...
Страница 67: ...After Sales Technical Documentation RAE RAK 1N Series Amendment 1 04 97 Chapter 3 Transceiver GE8 GE9 RF Block ...
Страница 93: ...After Sales Technical Documentation RAE RAK 1N Series Chapter 4 Transceiver GE8 GE9 UIF Module ...
Страница 106: ...After Sales Technical Documentation RAE RAK 1N UIF Page 4 14 Amendment 1 04 97 This page intentionally left blank ...
Страница 107: ...After Sales Technical Documentation RAE RAK 1N Series Original 08 96 Chapter 5 Transceiver GE8 GE9 SIM Flex Module ...
Страница 112: ...After Sales Technical Documentation RAE RAK 1N SIM Flex Page 5 6 Original 08 96 This page intentionally left blank ...
Страница 113: ...After Sales Technical Documentation RAE RAK 1N Series Original 08 96 Chapter 6 PDA Hardware Module GP1 ...
Страница 116: ...After Sales Technical Documentation RAE RAK 1N PDA Hardware Page 6 4 Original 08 96 This page intentionally left blank ...
Страница 158: ...After Sales Technical Documentation RAE RAK 1N PDA Hardware Page 6 46 Original 08 96 This page intentionally left blank ...
Страница 159: ...After Sales Technical Documentation RAE RAK 1N Series Amendment 1 04 97 Chapter 7 Service Software ...
Страница 243: ...After Sales Technical Documentation RAE RAK 1N Series Original 05 97 Chapter 8 Faultfinding Disassembly ...
Страница 287: ...After Sales Technical Documentation RAE RAK 1N Series Original 08 96 Chapter 9 Service Tools ...
Страница 301: ...After Sales Technical Documentation RAE 1N Series Original 04 97 Chapter 10 Schematics ...
Страница 303: ...RAE 1N Original 08 96 10 11 Page 1 Figure 1 Component Layout Bottom ...
Страница 304: ...RAE 1N Original 08 96 10 12 Page Figure 2 Component Layout Top ...
Страница 305: ...RAE 1N Original 08 96 10 13 Page Figure 3 Baseband Circuit Diagram PWRU ...
Страница 306: ...RAE 1N Original 08 96 10 14 Page Figure 4 Baseband Circuit Diagram MCM1 ...
Страница 307: ...RAE 1N Original 08 96 10 15 Page Figure 5 Baseband Circuit Diagram MCM2 ...
Страница 308: ...RAE 1N Original 08 96 10 16 Page Figure 6 RF TX Circuit Diagram ...
Страница 309: ...RAE 1N Original 08 96 10 17 Page Figure 7 RF RX Circuit Diagram ...
Страница 310: ...RAK 1N 10 20 Page Amendment 1 04 97 Figure 18 PCN Component Layout Bottom ...
Страница 311: ...RAK 1N 10 21 Page Amendment 1 04 97 Figure 19 PCN Component Layout Top ...
Страница 312: ...RAK 1N 10 22 Page Amendment 1 04 97 Figure 20 PCN RF TX ...
Страница 313: ...RAK 1N 10 23 Page Amendment 1 04 97 Figure 21 PCN RF RX ...
Страница 314: ...RAK 1N 10 24 Page Amendment 1 04 97 Figure 22 UIF Schematic PCN ...
Страница 315: ...RAK 1N 10 25 Page Amendment 1 04 97 Figure 23 UIF Component Layout PCN ...
Страница 316: ...RAE 1N Original 05 97 10 3 Page Figure 1 PDA Block Diagram Edit 82 for layout 13a ...
Страница 317: ...RAE 1N Original 05 97 10 4 Page Figure 2 PDA Power Unit PWRU Edit 108 for layout 13a ...
Страница 318: ...RAE 1N Original 05 97 10 5 Page Figure 3 PDA Serial Interface SIRU Edit 24 for layout 13a ...
Страница 319: ...RAE 1N Original 05 97 10 6 Page Figure 4 PDA MCU and Memory PROCU Edit 121 for layout 13a ...
Страница 320: ...RAE 1N Original 05 97 10 7 Page Figure 5 PDA EMIU Edit 21 for layout 13a ...
Страница 321: ...RAE 1N Original 05 97 10 8 Page Figure 6 Keyboard matrix Edit 24 for layout 13a ...
Страница 322: ...RAE 1N Original 05 97 10 9 Page Figure 7 PDA Memory Edit 28 for layout 13a ...
Страница 323: ...RAE 1N Original 05 97 10 10 Page Figure 8 PDA Component Layout 13a ...
Страница 324: ...RAE 1N Original 08 96 10 18 Page Figure 1 UIF Schematic ...
Страница 325: ...RAE 1N Original 08 96 10 19 Page Figure 2 Component Layout Uif ...
Страница 326: ...After Sales Technical Documentation RAE RAK 1N Series Original 08 96 Accessories ...
Страница 340: ...After Sales Technical Documentation RAE RAK 1N Series Original 08 96 CARK60 Installation Guide ...
Страница 352: ...After Sales Technical Documentation Appendix 2 RAE RAK 1N Amendment 1 04 97 PARTS LISTS ...
Страница 399: ...After Sales Technical Documentation RAE RAK 1N Parts Lists Page 48 Amendment 1 04 97 Mechanical Assy Parts RAE 1N ...
Страница 401: ...After Sales Technical Documentation RAE RAK 1N Parts Lists Page 50 Amendment 1 04 97 This page intentionally left blank ...
Страница 402: ...After Sales Technical Documentation Appendix 1 RAE RAK 1N Original 08 96 QUICK GUIDE ...
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