Phone Is Totally Dead - Nokia NPD-4 Series Troubleshooting - Bb

NPD-4
Troubleshooting — BB

Phone is totally dead

Phone is dead
Phone current is zero
or too high?
No
Phone current is
< 30 mA
No
Phone current is
<= 35 mA
Yes
Is phone in local
mode?
Yes
OK restart
Page 28
Yes
Is phone flash
Yes
programming OK?
No
Check BSI line X110,
R202, R203, C230.
No
Are they OK?
Nokia Corporation
CCS Technical Documentation
-If current is zero, check X110 solder and
VBATT lines.
-If current is too high, check for shorts.
-Make sure all BB regulators are at their
respective voltage levels (e.g., VANA, VIO,
VCRE(DC-DC), VFlash1, and VR3). See
phone's top view diagram for test points.
-Make sure System Clk is 19.2MHz and
Sleep Clk is 32KHz.
-Make sure PURX and SleepX signals are
high (1.8V).
No
Yes
No
Confidential
Yes
Change UEM
Repair
Issue 1 02/2003