User Guide

Nokia Customer Care

RM-1

RF Troubleshooting

Company Confidential

7A - 13

Issue 1

,where 0xyy, 0xzz part is the main part of the error code: 0xyyzz

Error

code

Bit mask Reason Actions

0x0001 ---------------1

0x0002 --------------1-

0x0008 ------------1---

0x0010 -----------1----

Test cannot be executed.

Internal SW error. Should not happen.

Does RF-BB interface self test also fail?

3.1.1.1.2 “

RFBUS signals ok?”

0x0004 -------------1-- Power detector reading is

outside limits.

3.1.1.1.1. “RF operating voltage

VBAT_ASIC?”

Check WCDMA power detector circuitry:

Follow troubleshooting in section

4.1.2.3.2.4 “

Does SMPS get correct

control voltage from the WCDMA

power detector (signal Vcontrol)?”

Measure also WTXDET-signal: 2.6.1.

“

WCDMA power detector ok?”

If ok => Retu AD converter faulty?

Please, refer to chapter 2.11 “

Error Code Interpretation Examples”, if more information about

error code interpretation is needed.

2.6.1 WCDMA power detector ok?

Follow these instructions if it’s needed to check WCDMA power detector functionality. Please

notice that WCDMA power detector is used only in maximum TX power limiting and WCDMA PA

supply voltage controlling purposes.

• WCDMA transmitter has to be active before measurements. Procedure is explained in

chapter “General instructions for TX troubleshooting”.

• Measurement can be done with an oscilloscope and a probe.

• Connect the probe to R7531.

• WTXDET signal should be constant DC-voltage. Voltage level should change if TX power is

changed. Vcontrol is lower on lower power levels and higher if higher power levels are

used.