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3.3 Repair Document
Description of procedure
Diagnosis
Visual check and measure with a multimeter to detect if the RTC is oxidized or
deformed.
Repair by component change
1. Remove the defected RTC by Hot Air Blower (350°C ~ 400 °C) (350~400 °C).
2. Put on new RTC and add solder at the "+" side first.
3.
Then add solder at the "-" side.
Repair by SW-Booting
Not possible!
Test
Retest handset after repair procedure as described above
List of needed material
Components
ST55 RTC battery
Part Number: L36385-F505-X
Jigs and Tools
Hot Air Blower (350°C ~ 400 °C)
Soldering Iron (350°C ± 20 °C)
Special Tools:
Multimeter
Working materials
Desolder Wick / Braid
Solder
V 1.1
ST55
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