Onkyo TX-DS474 Service Manual - Page 17

IC BLOCK DIAGRAM CS4226 (Codec) DGND2 VD+ SCLK DGND1 LRCK RX1 SDOUT1 SCLKAUX/RX2 SDOUT2 LRCKAUX/RX3 -----,..Th _.----- SDIN1 DATAUYJRX4 --\ HOLD/RUBIT in in ri rt i-t in rt rt ri rt r-t 7 -- SDIN2 44 42 40 38 36 34 333/ - SDIN3 SCUCCLK --\ c 1 ; 32 ) /- CLKOUT SDA/CDOUT ----- Cc ADI/CDIN --ft...* C C 4 5 313 - OVUERR 2390 3' 3,--- XTO ADO/CS C a SPU12C -- PDN _/ C c c 7 8 9 ,1ieelw' 2226763J3-.-"-- XTI DEM 25 3\- AOUT6 AIN3R/AUDIO -_.--ii cC 10 11 2243 33 \.__.____AOUT5 AIN3UAUTODATA / 12 14 16 18 20 22 AOUT4 AIN2UFREQ0 LILJI-WI-IlJUL.J1-1 1-7 1-J AOUT3 AIN2R/FREQ1 AOUT2 AIN1R AOUT1 AIN1L AGND2 AINAUX VA+ • CMOUT AGND1 FlLT TX-DS474 Pin No. Symbol I/O Description 1 DATAAUX/RX4 I Auxiliary data input / receiver channel 4 2 HOLD/RUBIT I/O S/PDIF receiver user bit / HOLD control 3 SCL/CCLK I/O Serial control interface clock 4 SDA/CDOUT O Serial control data out 5 ADI/CDIN I Address bit / serial control data in 6 ADO/CS O Address bit / control post chip select 7 SPI/PC I/O Control post format 8 PDN Power down pin 9 AIN3R/AUDIO Right channel multiplexer input 3/AC3 I and MPEG detect output Righrt channel multiplexer input 3/AC3 10 AIN3R/AUTODATA I and MPEG detect output 11 AIN2L/FREQ0 12 AIN2R/FREQ1 Left channel multiplexer input 2/channel 1 status freci.bit Right channel multiplexer input 2/channel I status frea.bit 13 AIN1R I Right channel multiplexer input 1 14 AIN1L I Left channel multiplexer input 1 15 AINAUX I Auxiliary line level input(non A/D converter) 16 CMOUT O Common mode output 17 FILT PLL loop filter pin 18 AGND1 - Analog ground 19 VA+ - Analog power input 20 AGND2 Analog ground 21 AOUT1 O The analog outputs from the 6 D/A converters. 22 AOUT2 O The analog outputs from the 6 D/A converters. Pin No. Symbol 23 AOUT3 24 AOUT4 25 AOUT5 26 AOUT6 27 DEM 28 XTI 29 XTO 30 OVL/ERR 31 CLKOUT 1./O Description O The analog outputs from the 6 D/A converters. O The analog outputs from the 6 D/A converters. O The analog outputs from the 6 D/A converters. O The analog outputs from the 6 D/A converters. O De-emphasis control - Crystal connections - Crystal connections O Overload indicator O Master clock output 32 SDIN3 I Serial data input 3 33 SDIN2 I Serial data input 2 34 SDIN1 I Serial data input 1 35 SDOUT2 O Serial data output 2 36 SDOUT1 O Serial data output 1 37 LRCK I/O Left/Right select signal I/O 38 SCLK I/O DSP serial port clock I/O 39 DGND2 - Digital ground 40 VD+ - Digital power input(+5V) 41 DGND1 - Digital ground 42 RX1 Receiver channel 1 43 SCLKAUX/RX2 I/O Auxiliary bit clock input or output / receiver channel 2 Auxiliary word clock input or output / 44 LRCKAUX/RX3 I/O receiver channel 3