RM-384
RF Troubleshooting
Issue1 Company Confidential Page 4-11
Copyright © 2008 Nokia. All rights reserved.
RF TX voltage checking
Steps
1. Set up the main board in the module jig.
2. Check the following:
#
Signal name
Test point
Voltage (all bands)
1 TX_2.85V
U403
2.85V
2 MSMP_2.6V
U403
2.6V
3 TX_ON
U403,U301
2.6V
4
PA_RXX
U403,U301
0V for high gain mode 2.4~2.5V for low gain mode
5
PA_ON0
U403,U301
2.5~2.6V for PA turning on, 0V for turning off (CELL)
6
PA_ON1
U403,U301
2.5~2.6V for PA turning on, 0V for turning off ( PCS)
Table 17 RF TX voltage checking point information
Figure 40 Tx DC checking test points
