Nokia RM-529 Service Manual page 82

Loop test
terminal
AV mic to AV ear HS_MIC
and GND
AV mic to HP ear HS_MIC
and GND
Ext microphone HS_MIC
in Int handsfree and GND
out
Measurement data
Figure 11 AV mic to AV ear, single-ended loop measurement. 16 kHz lowpass filter is used to attenuate noise from the
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Input Output
terminal
HS_EAR_R and
GND
HS_EAR_L and
GND
B2101 pad1
and GND
B2101 pad2
and GND
B2102 pad1
and GND
B2102 pad2
and GND
signal. The filter is optional.
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BB Troubleshooting and Manual Tuning Guide
Path gain Input voltage,
[dB] (fixed) 1 kHz sine
[mVp-p]
+21.3 100
+18.2 100
+3.6 with 1000
lowpass
filter
RM-529; RM-530; RM-584
Single-ended Output
output DC level
voltage [mVp- [V]
p]
584 0
407 1.5
758 with NA
lowpass filter
See the
Measurement
data graphics
below
Issue 1