Nokia RM-164 Service Manual page 75

RM-164
BB Troubleshooting and Manual Tuning Guide
Loop test Input
terminal
Internal Mic IB2201
to External (DATA /
Earpiece GND)
Measurement data
Figure 11 Single-ended output waveform of the Ext_in_HP_out measurement when earpiece is connected.
Figure 12 Differential output waveform of the Ext_in_IHF_out out loop measurement when speaker is connected.
Figure 13 Single-ended output waveform of the HP_in_Ext_out loop when microphone is connected.
Issue 1
Output Path gain
terminal [dB]
(fixed)
D+, D- and 22.7
GND
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Input Differential
voltage output
[mVp-p] voltage
[mVp-p]
100 1360
Output DC Output
level [V] current
[mA]
1.2 NA
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