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Nokia 3105 Servicehandbuch

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CCS Technical Documentation
Troubleshooting — BB
RH-48
Issue 1 11/2003
© 2003 Nokia Corporation         Confidential 
Page 45
Display faults
Display
faults
Display
faults,
page 2
Are the UI module
LEDs turned on when
phone is turned on or
when making a phone
call?
Measure VBATT
voltage at C313. Is it
OK?
Check VBATT line
Set phone in Local Mode. Use
Phoenix "Message Sender" and
navigate 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 driver
signal from UEM at
J336.
 Is the signal OK?
Change the UEM
Check N302 driver
signal at C304. If not
OK, change N302.
NO
NO
YES
NO
YES
YES