Nokia RH-41 Series Troubleshooting Instructions page 9

CCS Technical Documentation
OK
Check
19.44MHz RF
clock from C420
OK
Check that purx goes
up to 1.8V
OK
Measure J406 (it
should be 1.08MHz)
OK
Change
Programming OK but phone doesn't start
UPP (D400)
Issue 2 09/2003
Try to start phone to
test or local mode
FAIL
Measure Vflash1,
Vana, Vio, Vcore, VR3
when pwr key pressed
VANA and VR3 missing
Check G790 (missing
or misaligned)
Check C420
FAIL
OK
Check 19.44MHz from
G790
OK
Change N801
Reflash phone
FAIL
Figure 2: Fault tree, phone does not power up
Nokia Corporation
Troubleshooting Instructions
Check the power key
OK
Check R202, R206,
R207, C220, C240
FAIL
Measure VBAT from
OK
Check R792, C792,
FAIL
Change G790
FAIL
Programming fails
Confidential
RH-41
OK
R206, R207,
C220, C240
OK
Check X101
FAIL
C261
C793
OK
OK
Change UEM
(D200)
Go to Flash
Failure flowchart
Page 9