Nokia E62 Service Manual

Audio troubleshooting
Audio troubleshooting test instructions
Differential external earpiece and internal earpiece 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.
Internal handsfree output is measured using a current probe, if a special low-pass filter designed for
measuring a digital amplifier is not available. Note also that when using a current probe, the input signal
frequency must be set to 2kHz.
The input signal for each loop test can be either single-ended or differential.
Required equipment
The following equipment is needed for the tests:
• Oscilloscope
• Function generator (sine waveform)
• Current probe (Internal handsfree PWM output measurement)
• Phoenix service software
• Battery voltage 3.7V
Test procedure
Audio can be tested using the Phoenix audio routings option. Three different audio loop paths can be
activated:
• External microphone to Internal earpiece
• External microphone to Internal handsfree speaker
• Internal microphone to External earpiece
Each audio loop sets routing from the specified input to the specified output enabling 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 the following table.
Phoenix audio loop tests and test results
The results presented in the 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.
Loop test Input terminal Output
terminal
Path
gain
[dB]
(fixed)
Input
volta
ge
[mVp-
p]
Differen
tial
output
voltage
[mVp-p]
Outpu
t DC
level
[V]
Outp
ut
curre
nt
[mA]
External Mic to Internal
Earpiece
XMICP and GND EarP and GND 35 100 920 1.2 NA
EarN and
GND
RM-88
Nokia Customer Care BB Troubleshooting and Manual Tuning Guide
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Nokia E62 Specifications

General

Panel type	LCD
Display resolution	320 x 240 pixels
Display number of colors	16.78 million colors
Ringer type	Polyphonic
Processor frequency	0.235 GHz
Internal memory	80 MB
Compatible memory cards	miniSD
Multimedia Messaging Service (MMS)	Multimedia Messaging Service (MMS) is a standard way to send messages that include multimedia content to and from a mobile phone over a cellular network
Bundled software	S 60 UI
Form factor	Bar
Product color	Silver, White
Talk time (2G)	5.5 h
Battery capacity	1500 mAh
Standby time (2G)	330 h
2G standards	EDGE, GPRS
Keyboard layout	QWERTY
Personal info management (PIM)	Alarm clock, Calculator, Calendar, Notes

Weight and Dimensions

Depth	14 mm
Width	69.7 mm
Height	177 mm
Weight	144 g