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CONFIDENTIAL
Service & Analysis Center Europe
Training Team
version 1.0 / 05.11.1999 Page 4 of 37
Doesn't Switch on
Check VB (Battery 2,4V-3V)
on L102
check connector X101/ X102
change if bend or soiled
Phone doesn't switch on, section: DC / DC converter
check the connection between
L102 and R132 (0 Ohm)
Swap the phone if the
connection is open
check solder of V105 or
change if necessary
check the voltage on V101
anode 2,6V; cathode 3,2V
check solder of V105 or
change if necessary
check also R102, R105, R112
DC/ DCconverter is oK!
continue with CCONT
Check 600KHz switching
frequency on Pin 4,5,12,13 of
V105
Check 1,2V operation voltage
on Pin 15 of V105
No
No
No
No
No
Yes
Yes
Yes
check the solderings and
resistance of L102 "0Ohm"
resolder or change L102
check pin 3 from V105
on="low"status 0Ohm
Yes
No
Yes
Yes
check V109 and the
respective voltage deviders
R131,132,134,143,144
No