Table 3 All Test Items For Audio - Nokia 301 Service Manual

The below test item in PST is relate to audio:
Test No.
1 Vibra test
2 Tone generator *
3 Microphone
4 Selftest->ST_HOOKINT_TEST
* IHF = integrated hand free speaker; speaker=hand portable receiver (earpiece).
Step 2 , if step1 test fail, pls refer below trouble shoot charts.
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Table 3 All test items for audio

Test items
Speaker
IHF
Internal
external
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BB Troubleshooting and Manual Tuning Guide
Debug what?
vibrator
earpiece/speaker
internal mic /external
mic
Headset hookkey
RM-839; RM-840; RM-841
What to do If test fail
Check whether drive
signal Vrms=1.8~1.9V,
if not, change vibrator
Go to related chart
Do test3 to verify if it is
earpiece problem, if
not, go to internal mic
chart
Feedback to engine
team do further check
Issue 1