Nokia 3210 Repair Manual page 44

Customer Care Europe & Africa
Technical Services Training Group
TX Power faults
FOR DETAILED TROUBLESHOOTING AND FURTHER INFORMATION SEE SERVICE MANUAL CHAPTER 4/GSM & 5/PCN TRANSMITTER
Z500 faulty – (low TX power / GSM900)
Check TX power level difference at Z500 between TX pad & Antenna pad
Check soldering of Z500
Z504 faulty (low TX power / GSM1800)
Check switching voltage at Z504 (C507): 1VDC
Check TX power difference at Z504 between TX pad & Antenna pad
If the difference > 2dBm – change Z504
N500 / N501 faulty (low TX power GSM900 / GSM1800)
All hints are always for both bands (GSM/PCN) – so take only the band depending on your faulty one
Check VDC_OUT 3.2V .... 4.2V (depending on power level) at N500 / N501
Check input / output power difference at N500 / N501
Check CTL_GSM signal at N500 (1.2Vpp .... 1.9Vpp – depending on the used power level) at N700, pin 31
Check CTL_PCN signal at N501(1.0Vpp .... 1.6Vpp – depending on the used power level) at N700, pin 28
(see diagram below)
Change corresponding PA if control lines are ok
CTL_PCN signal at N700, pin 28 – in this example measured at power level 0
© 2001 Nokia Mobile Phones
CONFIDENTIAL
NSE-8/9
Date: 05.09.2001
Checked by:
CC Training Group
44 (48)
Repairhints
Version 5.0 Approved
Approved by:
Technical Services