Only For Training And Service Purposes - LG KF305 Service Manual

Analog Audio Output Drivers
Audio Output 1
PGA gain for Audio Output 1 can be set by using bits AudOut1Gain[4:0] in the AudOut12Control
(0x21) register. Output 1 is used for 32 Ω interface with differential output but can be used by single
ended interface.
And this model only uses passive filters between output port and Receiver.
Audio Output 2
PGA gain for Audio Output 2 can be set by using bits AudOut2Gain[4:0] in the AudOut12Control
(0x21) register. Output 2 is used for 8Ω. This port supports only a differential interface. And this
model only uses passive filters and Class D audio amplifier between output port and speaker. Audio
amplifier Gain is set by hardware component and gain is 6 times.
Copyright © 2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

Figure 3-15-2 ABB Audio OUTPUT1
Figure 3-15-3 ABB Audio OUTPUT2
- 51 -
3. TECHNICAL BRIEF
LGE Internal Use Only