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Appendix A: RF Troubleshooting
A-14
Company Confidential
Copyright
©
2005 Nokia. All rights reserved
2.4 TXC Data test (ST_TXC_DATA_TEST)
TXC_DATA_TEST (74) tests that the TXC line between RETU & VINKU is properly connected. If this fails
also TX power tests will fail.
Test covers: TxC power control signal, Retu (N2200), RFBUS, Vinku (N7501), VBAT_ASIC
Error code for this self test is given in format:
•
0xyy, 0xzz, MeasResult1, MeasResult2, …
,where 0xyy, 0xzz part is the main part of the error code:
0xyyzz
ST_CDSP_TXC_DATA_TEST
ERRORS
Propable cause:
Faulty RETU
Other possible reasons:
Vinku, but it only routes the
voltage back to RETU so in this
test, so it’s very unlikely.
YES
NO
YES
Propable cause:
Poor soldering/Faulty VINKU
Poor soldering/Faulty RETU
It’s not possible to
get here…
NO
TXC too high at min
input (0x0001)
TXC too low at max
input (0x0002)
