Sharp LC-20AV7U Service Manual - Page 30

Audio Block Diagram NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. MAIN CBA TO IF/VIDEO BLOCK SIF DIAGRAM IC851 (MTS/SAP AUDIO SIGNAL PROCESS) 21 SIF DEMOD INPUT VCA SIF/BB SW 24 I2C 27 DECORDER STEREO FILTER SAP FILTER OFFSET CANCEL SAP DEMOD L+R FILTER L-R FILTER SAP OUT FILTER 75uS DE-EMPH (L-R)/SAP SW Comparison Chart of Models and Marks Model Mark LC-20AV7U A LC-20SH7U B AUDIO SIGNAL OFFSET CANCEL WIDE BAND FILTER WIDE BAND RMS DET WIDE BAND EXPAND OFFSET CANCEL dBX DE-EMPH SPECTRAL EXPAND SPECTRAL FILTER SPECTRAL RMS DET L-CH 30 MATRIX AGC R-CH 29 8-3 JK1701 DIGITAL AUDIO-OUT TO DTV MODULE BLOCK DIAGRAM DTV-SPDIF DTV-AUDIO(L) DTV-AUDIO(R) JK704 AUDIO(L) -IN1 JK705 AUDIO(R) -IN1 JK709 AUDIO(L) -IN2 JK710 AUDIO(R) -IN2 TO SYSTEM CONTROL BLOCK DIAGRAM TO IF/VIDEO BLOCK DIAGRAM AUDIO-MUTE VOLUME SCL SDA INPUT-0(INV) INPUT-1(INV) INPUT-2(INV) IC852 (INPUT SELECT) (L-CH) 12 TUNER 15 AUDIO1 11 AUDIO2 13 14 DTV (R-CH) 1 TUNER 2 AUDIO1 4 AUDIO2 3 5 DTV SW CTL INH 6 9 10 IC801 (AUDIO AMP) (L-CH) 6 (R-CH) 1 MUTE /STANDBY CONTROL AMP 11 VOLUME AMP 14 WF7 2 7 P-ON+5V(2) Q802 AUDIO MUTE CL802 1 SP-L 1 2 SP-GND 2 JUNCTION-B CBA CL801 1 SP-R 1 2 SP-GND 2 JUNCTION-A CBA A SP802 SPEAKER L-CH SP801 SPEAKER R-CH CN802 CLN802 SP-L 1 SP-GND 2 JK801 HEADPHONE JACK B SP802 SPEAKER L-CH CN801 CLN801 SP-R 1 GND 2 SP801 SPEAKER R-CH A7144BLA