Synthesizer Troubleshooting Setup; Top Level Troubleshooting - Nokia 6235 Troubleshooting Manual

6235/6235i/6236i (RM-60)
RF Description and Troubleshooting

Synthesizer Troubleshooting Setup

Use the following steps to troubleshoot the synthesizer using Phoenix:
1. On the Phone Control dialog box, click the LOCAL button in the Phone State
area to put the mobile terminal into Local Mode.
2. Select the following values on the RF Main Mode dialog box:.
Synthesizer
UHF
Rx VHF
Tx VHF

Top Level Troubleshooting

Check for the folowing problems during your initial troubleshooting:
• Faulty synthesizers can cause both RX and TX failures during tuning, in addition
to the VCTCXO tuning.
• With AMS phones, it is recommended first to check for the presence of various
LO's signals and their proper levels.
• The reference clock, 19.2MHz, is needed for the phone to power up. Therefore, if
everything fails, perhaps it may be necessary to check the presence of 19.2MHz.
Page 46
Figure 44: Phone Control dialog box
Table 7: RF Main Mode Dialog Box Settings
Band
Cell
PCS
(one band is enough)
Cell
PCS
©2005 Nokia Corporation
Mode Channel
Rx/Tx 384
Rx/Tx 600
Rx
Rx/Tx 384
Rx/Tx 600
Company Confidential Issue 1 04/2005