Kenwood KRF-X7775D Service Manual

Also see for KRF-X7775D: User guide User guide Connection and setup guide

Contents

KRF-X7775D/X7775D-S/VR-5080/509011CIRCUIT DESCRIPTIONt No. Port Name I/O Function ACTIVEH L1 ERF I D.I.R. (X08, IC6) error flag.2 FS96 DET I 96KHz fs detection. H : fs>88.1kHz detection3 AUTO I Non-PCM detection. H : Non-PCM detection4 AVSS - GND5 DIR PD O Power down for D.I.R. (X08, IC6).L : DIR power down and reset6 DIR CS O Chip select for D.I.R. (X08, IC6). L : Chip selection7 AVREF - Reference voltage.8 DIR DIN I Data input from D.I.R. (X08, IC6).9 DIR DOUT O Data output for D.I.R. (X08, IC6).0 DIR CLK O Clock output for D.I.R. (X08, IC6).1 D MUTE O Mute signal output for D.I.R. (X08, IC6). Data mute2 DAC PD O Power down for D/A converter (X08, IC11/14/17/20). Powerdown3 DAC 96K O Double speed sampling mode for D/A converter speed mode(X08, IC11/14/17/20). H : Double4 DAC MUTE O Mute signal output for D/A converter Mute(X08, IC11/14/17/20).5 ADC RST O Reset signal output for A/D converter (X08, IC7). Reset6 MDT I Main microcomputer master data.7 SDT O Sub microcomputer data output.8 MCK I Main microcomputer control data clock9 MREQ I Main microcomputer master request.0 SREQ O Main microcomputer slabe request.1 REC 6dB O Rec gain control when HDCD +6dB. +6dB on~24 DSEL A~C O Control port for digital input selector (A~C).5 DSP POWER O Power supply for DSP/DAC/ADC/DIR.6 DSP RESET O Reset signal output for DSP.~32 DSP D0~D5 I/O DSP control data.3 VSS - GND,35 DSP D6,7 I/O DSP control data.6 DSP REQ O DSP communication request. Request7 DSP ACK I Input port of command data reading from DSP. Ack.8 DSP BUSY I DSP status busy. Busy9 DSP WRT O DSP Write Data write Data read0 DTS DET I DSP DTS detection. DTS1 PCM ZERO I PCM zero data detection. PCM 02 HDCD DET I DSP HDCD sync. Detection. HDCD3 HDCD 6dB DET I DSP HDCD +6dB detection. (KPCM) +6dB4 OVER LEVEL I DSP over level detection. Over level5 PCM MUTE O DSP mute control (PCM). Fixed6 DRIVE O DSP D.R.I.V.E. /HDCD control (PCM). D.R.I.V.E/HDCD ON7 SUB MUTE O Sub microcomputer analog mute. Mute on~50 C ROOMB(C/B/A) O Zone B video selector control.,52 YC SEL(B, A) O Zone A video selector control.~59 C ROOMA(A~G) O Zone A video selector control.0 RESET I Reset signal input.1 YC MUTE O Zone A video selector (Y/C) mute control.2 FSC CTRL O Zone A video selector FSC control.3 VSEL O Zone A video selector control.4 CTRL A2 O Zone A video selector control A2.5 CTRL B O Zone A video selector control B.6 CTRL A O Zone A video selector control A.ort Description of Sub Microcomputer : uPD784224K507 (X08,IC43)