Service manual

GTC Service Manual
ASUS Proprietary 18
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碩
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4.8
4.8 4.8
4.8 Audio Te
Audio TeAudio Te
Audio Test
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4.8.1 Headset fail
Visual inspection earphone connector depends on soldering issue.
a. If headset signal can’t be detected by phone. Please check the ，
JACK_DET_1 and JACK_DET_2 1.8V. Please check
the below components:R36、R93、C56、C240.
b. Audio no effect on R/L pathway
Please check the related circuit on U12, , ex:C40、C41、R37、
R38 both side to avoid soldering issue. Check the R30 Pin2 是
High ( 1.8V )
c. Can’t record
Please check the signal from HSMICP and HSMICN, Please
check the related component on soldering issue. ex. C51、C52、
R35.
Figure 12. Headset Circuit - 01