User Guide

Table Of Contents

Visual defects (pixel) Pixel defects can be checked by controlling the

display with Phoenix. Use both colours, black and

white, on a full screen.

The display may have some random pixel defects

that are acceptable for this type of display. The

criteria when pixel defects are regarded as a display

failure, resulting in a replacement of the display, are

presented the following table.

Table 7 Pixel defects

Item White dot defect Black dot

defect

Total

1 Defect counts R G B White Dot

Total

1 1

1 1 1 1

2 Combined

defect counts

Not allowed.

Two single dot defects that are within 5 mm of each other should be

interpreted as combined dot defect.

Steps

1. Verify with a working display that the fault is not on the display module itself.

The display module cannot be repaired.

2. Check that the cellular engine is working normally.

i To check the functionality, connect the phone to a docking station.

ii Start

Phoenix

service software.

iii Read the phone information to check that also the application engine is functioning normally (you

should be able to read the APE ID).

3. Proceed to the display troubleshooting flowcharts.

Use the Display Test tool in

Phoenix

to find the detailed fault mode.

RM-272; RM-273

BB Troubleshooting and Manual Tuning Guide

Issue 1 COMPANY CONFIDENTIAL Page 3 –21