Nokia 2220 Servicehandbuch

CCS Technical Documentation

Troubleshooting Instructions

RH-42

Issue 2 09/2003

Nokia Corporation Confidential

Page 17

Sleep Clock

Missing/nonfunctional sleep clock causes

• Entering sleep mode fails (higher current consumption -> shorter standby time).

• Baseband self tests cannot be run.

• Phone clock (on display) does not function properly.

Figure 7: Fault tree, sleep clock

Sleep mode not

working

Measure sleep clock

from B200

Check C209 and

C210

Change B200

Change UEM (D200)

Change UPP (D400)

Fail