Nokia E72, Руководство по обслуживанию

Страница: 81 / 170

9. Use Phoenix (Testing
→
Display test
→
Lights tab) to verify the calibration by reading the luminance value
for both the reference phone and calibrated phone.
Note: Remember that the illuminance readings for the reference and calibrated phones must be
done in the same ambient light conditions. If the illuminance values differ more than +- 10%, repeat
the whole ALS calibration procedure.
10. To end the calibration, click Close.
Audio troubleshooting
Audio troubleshooting test instructions
External earpiece, internal earpiece and internal handsfree outputs can be measured either with a single-
ended or a differential probe.
When measuring with a single-ended probe each output is measured against the ground.
The input signal for each loop test is single-ended.
Required equipment
The following equipment is needed for the tests:
•
Oscilloscope
•
Function generator (sine waveform)
•
Phoenix service software
•
Battery voltage 3.7V
Test procedure
Audio can be tested using the Phoenix audio routings option. Three different audio loop paths are used in
the tests:
•
AV mic to AV ear
•
AV mic to HP ear
•
Ext microphone in Int handsfree out
Note: The internal uplink microphones can be tested using the Phoenix self test "ST-DIGIMIC-TEST".
If the test result is PASS, the uplink microphones are electrically OK. For more thorough testing, see
section Internal microphone troubleshooting (page 3–37) .
Each audio loop sets routing from the specified input to the specified output enables a quick in-out test. Loop
path gains are fixed and they cannot be changed using Phoenix. Correct pins and signals for each test are
presented in a table in the following section.
Phoenix audio loop tests and test results
The results presented in this table apply when no accessory is connected and battery voltage is set to 3.7V.
Earpiece, internal microphone and speaker are in place during measurement. Applying a headset accessory
during measurement causes a significant drop in measured quantities.
The gain values presented in the table apply for a differential output vs. single-ended/differential input.
RM-529; RM-530; RM-584
BB Troubleshooting and Manual Tuning Guide
Issue 1 COMPANY CONFIDENTIAL Page 3 –33
Copyright © 2009 Nokia. All rights reserved.