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9.4
Repair Documentation
9.4.1 Description of procedure:
9.4.1.1 Diagnosis
9.4.1.2 Repair by component change
9.4.1.3 Repair by SW-Booting
9.4.1.4 Test
9.4.2 List of needed material
9.4.2.1 Components
9.4.2.2 Jigs and Tools
V1.2
The coil is used to generate the voltage to operate the piezo ringer. If it
is defective, the ringer cannot work anymore.
Check the status of the coil by measuring its resistance with a
multimeter. The resistance must be very low. Also broken coils have to
be replaced.
Use hot air blower or soldering iron to remove defective coil.
Avoid excessive heat!
Watch surrounding components!
Resolder new coil afterwards.
Not possible!
Retest handset after repair.
Ringer Coil C25(88)
Part-Number:
L36151-F5105-K3
Hot Air Blower
Soldering Iron
Page 30 of 34
Information and Communication Products
Communication Devices
ICP CD ST
D. Schnoor
8/99

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C2588

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