Wcdma Transmitter Self Test (St_Cdsp_Wcdma_Tx_Power_Test) - Nokia 6680 RM-36 Service Manual

Appendix A: RF Troubleshooting

2.8 WCDMA transmitter self test (ST_CDSP_WCDMA_TX_POWER_TEST)

TX_WCDMA_POWER_TEST (75) checks the output power of the WCDMA transmitter.
Test covers: Modulator, Vinku (N7501) IC gain stages, IC output supply components, TX filter, WCDMA
PA (N7503), DCDC-converter (N7504), RFBUS, VBAT_ASIC, VBAT_PA
Test does not cover: Circulator (Z7505), duplexer (Z7502), and antenna
To prevent network interference, the phone must be in an RF shield box, when this test is run!
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:
Propable cause:
Propable cause:
Plenty of components
Plenty of components involved. Go
involved. Go through the whole
thro ugh the whole
"WCDMA TX power and transmit
p wer and transmit frequency o
Frequency ok?"
to find reason.
ok?"
Too low output power
Too low output power
(0x0010)
(0x0010)
A ny power at Vinku
Any power at Vinku output
output at all?
at all ?
YES YES
Poor solder/Faulty Vinku
Poor solder/FaultyVinku
"WCDMA TX
to find reason.
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ST_CDSP_WCDMA_TX_POWER_TEST ST_CDSP_WCDMA_TX_POWER_TEST
NO NO
Any other code Any other code
YES YES
NO NO
Propable cause:
Propablecause:
Company Confidential
0xyyzz
It's not possible to
It's not possibleto
NO NO
get here...
get here ...
YES YES
Propablecause: Propable cause:
Test problem
Test problem
RFBUS failure (but this should
RFBUS failure (but this
be ok if we've gotten this far)
should be ok if we've
gotten this far)
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