Common Problems; No Communication During Flash; No Communication During Alignment; Failed Self Test/Calibrate - Nokia 6265 Baseband Description And Troubleshooting

Nokia Customer Care

Common Problems

The following section has a list of common problems, along with some standard checks.

No Communication During Flash

• Make sure there is a good connection between flash adaptor and the mobile
terminal
• The mobile terminal has to be powered by prommer (FPS-8)
• Check the Baseband regulators VR3, VIO, VCORE, VFLASH1
• The mobile terminal will not able to flash without 19.2Mhz clock into D2800
• Check BSI, MBUS, FBUSRx, FBUSTx, PURX, SLEEPX for bad solder joints between
UEMEK and D2800
• Check the Flash bus signal and VPP voltage level

No Communication During Alignment

• Check all connections between test fixture, cables and the mobile terminal
• Make sure the mobile terminal is in Local Mode, check Vbat voltage and current
level. If not, check BSI signal level
• Make sure the mobile terminal is programmed/flashed

Failed Self Test/Calibrate

• Make sure the mobile terminal is in local mode
• Make sure power supply provides enough current (approximately 500mA and 2A
for tuning)
• Use the troubleshooting guide to verify the failed circuit

Mobile Terminal Not Powering Up

Refers to when no power causes the mobile terminal to not able to flash, not to get into
local mode and similar problems.
• Check the baseband regulators – VR3, VIO, VFLASH1, VCORE dc/dc, PURX
• Check VCTCXO 19.2MHz signal at D2800 input
• Check power-up sequence
• Check the Flash IC, flash bus signals, and voltage level

Shut Down After 32 Seconds

• Check for the absence of 32KHz SleepCLK
• Check for incorrect SleepX and PURX signal levels
• Check if ESN number is corrupt
Issue 1 11/2005
©2005 Nokia Corporation
6265/6265i/6268 (RM-66)
Baseband Description and Troubleshooting
Company Confidential Page 51