Display Module Troubleshooting; General Instructions For Display Troubleshooting - Nokia RM-627 Service Manual

Symptoms and diagnosis
Position
Phone lying flat on
table. Display up.
Phone lying flat on
table. Display down.
Holding the phone
vertically
Holding the phone right
side down
The impact test is done with the phone in four different positions to test all axes. The table presents the nominal value readout value
for x, y and z axis in the different phone positions. Tolerance +/- 0.9
Supply
VAUX2
VIO

Display module troubleshooting

General instructions for display troubleshooting

Context
• The display is in a normal mode when the phone is in active use.
• The operating modes of the display can be controlled with the help of
Display blank
Image on the display not correct
Backlight dim or not working at all
Page 3 – 26
Table 5 Nominal x, y, z readout
Nominal readout X
0.0
0.0
0.0
-1.0
Table 6 Nominal voltages
Measure on
C6503
C6504
Table 7 Display module troubleshooting cases
COMPANY CONFIDENTIAL
Copyright © 2010 Nokia. All rights reserved.
BB Troubleshooting and Manual Tuning Guide
Nominal readout Y
0.0
0.0
1.0
0.0
2.5 V
1.8 V
Phoenix .
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. The backlight can be on in some cases.
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
display fault troubleshooting flowchart.
Backlight LED components are inside the display
module. Backlight failure can also be in the
connector or in the backlight power source in the
main engine of the phone.
This means that in case the display is working
(image OK), the backlight is faulty.
RM-627
Nominal readout Z
1.0
-1.0
0.0
0.0
Nominal voltage
Issue 1