Only For Training And Service Purposes - LG GM210 Service Manual

Audio Output 3
PGA gain for Audio Output 3 Stereo Configuration can be set by using bits AudOutL-Gain[4:0] and
AudOutRGain[4:0] in the AudOutLRControl (0x22 ) register. When Audio Output 3 configured as
monophonic differential output PGA gain can be set by using bits AudOut3Gain[4:0] in the
AudOut3Control register (0x23 ).
This port is used for headset speaker in stereo. This port must use DC-coupling capacitor as output DC.
It uses two 100uF capacitor each other in left and right output.
Analog Audio Input
The AD6725 provides two analog input channels, AIN1 and AIN2, that may be used for both microphone
and line inputs. The AIN1 and AIN2 channels are identical. One of the two channels is typically used with
microphone built into a handset. The other channel is typically used with an external microphone or
external line input.
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Copyright © 2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

Figure 3-13-3 ABB Audio OUTPUT3
Figure 3-13-4 Audio Input Block Diagram
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3. TECHNICAL BRIEF
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only