Synthesizer Troubleshooting; Pihi (N7500) Troubleshooting - Nokia 6233 Service Manual

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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.
Suppliers
1 VBATRF (in)
2 VR1_RX (out)
3 VR1_TX (out)
4 VR2_TX (out)
5 VREFRF01 (in)
VB_EXT
6 VCP1 (in)
Page 7 –12
Figure 50 WCDMA TX test points
Signal Name
COMPANY CONFIDENTIAL
Copyright © 2006 Nokia. All rights reserved.
Test point
L7500
C7503
C7502
C7501
R7501
C2221
RM-123; RM-145
RF troubleshooting
Check GSM900
3.8VDC
2.8VDC
2.8VDC
2.8VDC
1.36VDC
4.76VDC
Issue 1