XOCECO PH-42T8 Service Manual page 18

M52797 instruction of the pin:
Pin Function
3 YPbPr2_L audio input
5 YPbPr2_R audio input
6 AV1_L audio input
7 AV1 audio input
8 AV1_R audio input
9 AV2_L audio input
10 AV2 audio input
11 AV2_R audio input
3.5 R2S15900
R2S15900 is a audio processing chip that take charge of audio switch, sound processing and
volume adjustment, controlled by IIC bus.
Internal block diagram:
Pin Function
20 Video output to PW2300
22 Right track audio output
23 Video output to AVOUT interface
24 Left track audio output
25 TV_R audio input
26 TV video input
27 TV_L audio input
16