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G800 Service Manual
6.2.3 Side Tone Not transmitted ( Ear-piece )
Repeat 6-2-1 No receiving tone heard.( Ear-piece )
1.Check to see if Mic + pin is around 1.8V : CP120
NO
Check that R104,C181 is cold solder,broken,short to the other
PCB pattern or not
If you find out any defective part, you replace it.
Set to HP8922M to connect a call and then set to 1Khz with Echo audio mode.
2.Check U102 No. J10(C132) pins for wave form : CP121
NO
Replace MIC
6.2.4 Side Tone Not transmitted ( Hands-free Mic. )
Repeat 6-2-2 No receiving tone heard.( Hands-free Earphone ).
1. Check to see if U102 No. H10(C130) pin is 2.5V : CP122
NO
Check that R107, R108, C128 and C151 is cold solder,broken,short to the other
PCB pattern or not.
If you find out any defective part, you replace it
Set to HP8922M to connect a call and then set to 1Khz with Echo audio mode.
3. Check U102 No. H10(C130) pins for wave form : CP122
NO
Replace Handsfree Mic.
PANTECH
CP117
CP119
CP118
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R&D CONFIDENTIAL
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