Nokia RM-57, Service Manual

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Nokia Customer Care Appendix A: RF Troubleshooting
Company Confidential
Copyright © 2005 Nokia. All rights reserved
A-19
2.9 Error Code Interpretation Examples
This section presents three different examples of RF error code interpretation.
2.9.1 Example 1
ST_CDSP_RX_PLL_PHASE_LOCK self test gives “Fatal” result with error code: 0x00, 0x04
This means that the total error code is “ 0x004” (“ 0000 0000 0000 0100” in binary format) and if
we look a flowchart in section RX PLL phase lock self test (ST_CDSP_RX_PLL_PHASE_LOCK_TEST) the
meaning for the code is “Hinku PLL is not locked”.
2.9.2 Example 2
Some of the self-tests can return multiple errors at the same time.
For example: RF-BB interface (ST_CDSP_RF_BB_IF_TEST) self test gives “Fatal” result with
error code: 0x00, 0x09, …
This means that the total error code without measurement values is “ 0x0009” and this is the
same as “ 0000 0000 0000 1001 ” in binary format. If we look closer there are multiple errors (2)
found:
Bit mask “ ---- ---- ---- ---1 ” = “ 0x0001 ”
Bit mask “ ---- ---- ---- 1---“ = “ 0x0008 ”
Troubleshooting can be continued with RF-BB interface (ST_CDSP_RF_BB_IF_TEST) flowchart
because there are errors with two error codes: 0x0001 and 0x0008.
2.9.3 Example 3
Supply test for Hinku and Vinku (ST_CDSP_RF_SUPPLY_TEST) is slightly different self test from others
because there are both Vinku and Hinku errors shown in the same error code (
The format for error
code is explained in section Supply test for Hinku and Vinku ).
For example: ST_CDSP_RF_SUPPLY_TEST gives “Fatal” result with error code: 0x0B, 0xBC, 0x00,
0x00, …
This error code means that there are probably no errors in Hinku RX ASIC supply voltages because
the main part of the error code for Hinku
is 0x00, 0x00 (=0x0000) and means the same as “no
errors”.
Anyway, there are many errors with Vinku TX ASIC supply voltages. The main part of the error
code for Vinku is
0x0B, 0xBC and that’s the same as “ 101110111100 ” in binary format. If we look
closer there are multiple (8) errors found:
Bit mask “ ---- ---- ---- -1--“ = “0x0004”
Bit mask “ ---- ---- ---- 1---“ = “0x0008”