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b. When play stereo music
channel, L23 and L14 shall have audio signals, otherwise please check the related components
in the green path.
c. L7 shall be (2.8V)
d. R39 (GP16_JACK_AMP_SHDN#) shall be high (2.8V)
e. In the right channel, L24 and L13 shall have audio signals, otherwise please check the related
components in the green path.
c. Please check the microphone bias of headset in R18 and R80 first. L3 (C88, HSMICN) and
L22 (C91, HSMICP) shall have voice signals if you speak to microphone of headset.
d. Please unplugged headset.
(or run audio test for MMI testing program)
GTC
■
Service Manual
to headset, in the left
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