Backlights Controlling In Phoenix; Switching Display Lighting On Using Phoenix - Nokia RM-313 Service Manual

RM-313
BB Troubleshooting and Tuning Guide
Iterate by changing IPhoto (reference level) value (remove cross from Use manually added values).
After writing a value to IPhoto (reference value), press the Calibrate button. Stop iterating when the co-
efficient is equal to the co-efficient calculated in bullet 6. Note that decimal numbers should be used in
the iteration in order to achieve enough precision (e.g 23.2455).
8. After having a co-efficient value in the Co-efficient textbox as the calculated value, make sure that
ambient light values (read using TestingDisplay TestLuminance textbox) are almost the same in the
reference phone and the calibrated phone. Remember that illuminance readings for the reference and
calibrated phones must be done in the same ambient light conditions. If illuminance values differ a lot
(difference max. +- 10%), repeat the ALS re-tuning procedure from the beginning.
9. To end the calibration, click Close.

Backlights controlling in Phoenix

There are two power sources for lights. One is an SMPS type LED driver giving about 16V out, when 4 LEDs
are connected as serial between its output and GND. Output is shared to two branches (4 + 4 LEDs in serial).
This SMPS type LED driver is used for powering the display and S60 keyboard lights. Display lights must be
switched ON before it is possible to switch ON S60 keybord lights. However, S60 keyboard lights can be
switched OFF, although display lights are still ON.
The second LED driver (a current pump type driver) is used for powering all other LEDs (ITU keyboard and
side keys lights). This driver includes seven outputs. Each LED is connected straight from driver output to
GND. Different keybord lighting groups can be switched ON/OFF separately. In addition to that, it is possible
to switch ON/OFF every side key light independently.

Switching display lighting on using Phoenix

Steps
1. Connect phone to
Phoenix .
2. Start
3. Choose File Scan Product.
4. Choose Display Display test.
Issue 1
Phoenix .
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