Display Faults 1 - Nokia RH-37 Series Baseband Troubleshooting Instructions

Nokia Customer Care

Display faults 1

Display
faults
No
Check N2400
Measure
signal from C2407.
Is it
~16 V?
No
Measure
voltage from
C2424.
Is it ~2,4 V?
Yes
Measure
supply voltage
at C2409.
Is it ~4V?
Yes
Check L2405. OK?
Issue 1 07/04
Set phone into local mode.
Set VBATT 4.2V. Start
display test with Phoenix.
Set display and keypad
lights on.
Are the LEDs
turned on?
Check R2425
Yes
and X2400
pin1,12
Check control
signal line if
No
ok. If yes,
change UEM.
Check battery
No
and line.
change N2400
Yes
Change L2405
No
Nokia Corporation
6(a) - BB Troubleshooting Instructions
Yes
Display
faults 2
Retest
RH-37
Page 23