Service Manual Level 1 and 2
Nokia Lumia 630 (RM-976, RM-977)
Nokia Lumia 630 Dual SIM (RM-978, RM-979)
Version 1.0
Proximity sensor troubleshooting
Solutions to the possible problems are as follows:
Problem:
Display stays on during the call when phone is next to
the ear.
Solution:
Advice the customer to keep the phone closer to the
ear during the call. Cheek or ear should be in touch
with the display area of the phone, not the frame of
the phone.
Problem:
Display stays black when phone is removed from ear during the call or
Customer complains that phone display blinks or stays black when
headset, charger or both are connected.
Solutions:
1. Touch screen functions or proximity sensing may be affected by
humidity, rain drops, make-up, or dirt on the display. If your phone
touch screen becomes unresponsive, use a cleaning cloth to wipe the
touch screen clean. To avoid scratches on display do not use anything
that could scratch the display and do not use chemicals for cleaning.
2. Advice the customer that two short power key presses wake up the
display if it stays black in situation where is should be active.
3. Check that latest Phone SW is in use. That has the best proximity
sensing parameters.
4. Check that user has original Nokia headset and charger in use.
Display, Touch and Proximity sensing related troubleshoot
Proximity sensing
This phone does not have optical proximity sensor, like previous Nokia products. In this device touch
module is used for proximity sensing purpose. Proximity sensing works when call is active. When
conductive large object (e.g. face or ear) is in touch with display, display is turned off.
Troubleshooting on call related (proximity sensing) problems.
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