Txc Data Test (St_Txc_Data_Test) - Nokia RM-57 Service Manual

Appendix A: RF Troubleshooting

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:
Other possible reasons:
Vinku, but it only routes the
voltage back to RETU so in this
A-14
ST_CDSP_TXC_DATA_TEST
ERRORS
TXC too high at min
input (0x0001)
YES
Propable cause:
Faulty RETU
test, so it's very unlikely.
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TXC too low at max
NO
input (0x0002)
YES
Propable cause:
Poor soldering/Faulty VINKU
Poor soldering/Faulty RETU
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0xyyzz
It's not possible to
NO
get here...