Display Faults - Nokia RH-3 Series Troubleshooting - Bb

RH-3
Troubleshooting — BB

Display faults

Display
faults
Are the UI module
LEDs turned on
when phone is
turned on or when
making a phone
call?
Display
faults 2
Page 36
Measure VBATT
voltage at C310.
Is it OK?
Set phone in LOCAL mode.
Use Phoenix "Message Sender" and
navigate down as follows: DEV_HOST --
> DEV_PC --> PN_LIGHT -->
OBJ_ROUTING_REQ --> OBJ_PC -->
UTID --> LIGHT_CONTROL_REQ -->
LIGHT_CONTROL_TARGER_KBD.
Select "LIGHT_STATE_BLINK" and
click "Send'
Measure the UEM
signal @R306. Is
the signal OK?
Measure the voltage
@LEDs. Is it ~3.8V?
Change LEDs
Nokia Corporation
CCS Technical Documentation
No Check VBATT line.
Yes
No Change the UEM
Yes
No Change LM2795
Confidential Issue 1 06/2003