Display Module Troubleshooting; General Instructions For Display Troubleshooting - Nokia RM-596 Service Manual

Display module troubleshooting

General instructions for display troubleshooting

The first step is to verify with a working display that the fault is not on the display module itself. The display
module cannot be repaired.
The second step is to check that the engine is working normally. This can be done by connecting the phone
to a docking station and starting Phoenix service software. With the help of Phoenix read the phone
information to check that also the application engine is functioning normally (you should be able to read the
APE ID).
After these checks proceed to the display troubleshooting flowcharts. Use the Display Test tool in Phoenix to
find the detailed fault mode.
Pixel defects
Display blank
Image on the display not correct
Page 3 – 34
Figure 9 Expected SDTV CVBS NTSC signal on Oscilloscope
Table 6 Display module troubleshooting cases
COMPANY CONFIDENTIAL
Copyright © 2010 Nokia. All rights reserved.
BB Troubleshooting and Manual Tuning Guide
There is no image on the display. The display looks
the same when the phone is on as it does when the
phone is off.
Image on the display can be corrupted or a part of
the image can be missing. If a part of the image is
missing, change the display module. If the image is
otherwise corrupted, follow the appropriate
troubleshooting diagram.
RM-596
Issue 2