Nokia NSB-7 Series Service Manual page 275

PAMS Technical Documentation
Vbb
Vcore
Vcobba
Vref
Vbat
VXO
VRX
VTX
Vsyn1
Vsyn2
Power up sequence test:
Cconts digital parts keep MAD in reset by keeping PURX down for a delay of 62ms.
Here is shown the start up sequence picture.
Ch1 = Vbb
Ch2 = VXO
Ch3 = SleepClk
Issue 1 06/00
= 2.7V - 2.87V
= 1.3V - 2.65V
= 2,67V - 2.85V
= 1.48V - 1.523V
= 3.11V - 4.2V
= 2,67V - 2.85V
= 2,67V - 2.85V
= 2,67V - 2.85V
= 2,67V - 2.85V
= 2,67V - 2.85V
ãNokia Mobile Phones Ltd.
Disassembly & Troubleshooting
NSB-7
Page 27