User Guide

CCS Technical Documentation 7 - Troubleshooting Instructions
RH-26
Issue 1 02/04 ©Nokia Corporation Page 43
are needed (RF filters, power supply filtering, etc.) Bluetooth components are under the
RF shield assembly. External 2.8V regulator N131 is used as a power supply for bluetooth
internal regulator, which is switched on by PURX line. Antenna is integrated into the
main PWB, same shape in all layers 1-8.
In fault situation check:
• There is no mechanical damage between test point J148 and antenna.
• Output of N131 (VREG_IN) is 2.8V at test point J130. If not, check control signal
PURX 1.8V at N131/pin3 and Vbat at N131/pin1. If OK, change N131.
Figure 27: Bluetooth test points
Camera
Camera is connected to baseband (UPP) through HW accelerator IC D970. External 1.8V
regulator N970 is used as a power supply (VCAMDIG) for camera module and for HW
accelerator together with VFLASH2. N970 is switched on and off by GENIO(1) line.
In fault situation:
• Remove camera module and check connector X970 contacts and solderings.
• Check regulator N970: output should be 1.8V at C983,984 when J974 is 1.8V.
• Signals are according to the attached figures below: