Check Microphone Using "Hp Microphone In Ext Speaker Out" Loop - Nokia RM-340 Service Manual

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Check microphone using "Hp microphone in Ext speaker out" loop

Steps
1. Connect phone with Phoenix.
2. Open "audio test" window from "Testing -> Audio test", as shown in
above.
3. Select "Hp microphone in Ext speaker out"
4. Select "Acc. Detection" as "Off".
5. Select "Loop" as "On"
6. Input sound at microphone port, for example 94dB SPL 1kHz.
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Figure 19 4-pole jack plug for audio accessory
Table 4 Connector for External Audio Accessories
Signal name
PLUGDET
HS EAR L
HS EAR R
HS MIC
HS GND
COMPANY CONFIDENTIAL
Copyright © 2007 Nokia. All rights reserved.
Baseband Troubleshooting Instructions
Direction
Input
Output
Output
Input
-
Figure Phoenix audio test window
RM-340; RM-341
Description
Terminal internal
connection, plug
detection
Audio output
Audio output
Multiplexed
microphone audio and
control data
Ground contact
Issue 1