Figure 50 WCDMA TX test points
Synthesizer troubleshooting
PIHI (N7500) Troubleshooting
Preparations
Set Phoenix to RF local mode RX burst.
Check the following
Check the voltages in the steps below.
NO. Signal Name Test point Check GSM900
Suppliers
1 VBATRF (in) L7500 3.8VDC
2 VR1_RX (out) C7503 2.8VDC
3 VR1_TX (out) C7502 2.8VDC
4 VR2_TX (out) C7501 2.8VDC
5 VREFRF01 (in)
VB_EXT
R7501 1.36VDC
6 VCP1 (in) C2221 4.76VDC
RM-123; RM-145
Nokia Customer Care RF troubleshooting
Page 7 –12 COMPANY CONFIDENTIAL Issue 1
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