NAD M15 C/AH Service Manual

Also see for M15 C/AH: Owner's manual Specifications

NAD M15 C/AH Service Manual Manual pdf 19 page image

3.Volume and EXT. Section/L/R/C/SWL EXT. InputBufferU2011(OPA4134)Output BufferU2025(OPA4134)VolumeU2037(WM8816)Main L Output13dBr(DAC) 0.5dBr 0dBr(150mVrms)Muti-Source SelectorU2059(TC9274N-008)2.5dBr(EXT)BufferU2021(OPA2134)MuteQ2022, Q2023(SC3326)AttenuationR2230, R2231(220R), R2205(47R)0.5dBr0.5dBrIf load is10Kohms,attenuation is0.5dBDAC LPF(55KHz 2rd Butterworth with 16.5dB gain)U2013(OPA2134))rBd5.2(Bd0)smrVm002(Bd0From DAC L-20dBfs13dBris -32dBfs ifwithout "SW"13dBr(DAC)2.5dBr(EXT)Reduce 12.5dB if inputfrom DAC and Compensategain if DAC output ischangedReduce 4dB if DIALNORMis 27Reduce 2dB if input fromEXT.R EXT. InputBufferU2011(OPA4134)Output BufferU2025(OPA4134)VolumeU2037(WM8816)Main R Output13dBr(DAC) 0.5dBr 0dBr(150mVrms)Muti-Source SelectorU2059(TC9274N-008)2.5dBr(EXT)BufferU2021(OPA2134)MuteQ2024, Q2025(SC3326)AttenuationR2232, R2233(220R), R2206(47R)0.5dBr0.5dBrIf load is10Kohms,attenuation is0.5dBDAC LPF(55KHz 2rd Butterworth with 16.5dB gain)U2014(OPA2134))rBd5.2(Bd0)smrVm002(Bd0From DAC R-20dBfs13dBris -32dBfs ifwithout "SW"13dBr(DAC)2.5dBr(EXT)Reduce 12.5dB if inputfrom DAC and Compensategain if DAC output ischangedReduce 4dB if DIALNORMis 27Reduce 2dB if input fromEXT.C EXT. InputBufferU2012(OPA4134)Output BufferU2026(OPA4134)VolumeU2038(WM8816)Main C Output13dBr(DAC) 0.5dBr 0dBr(150mVrms)Muti-Source SelectorU2059(TC9274N-008)2.5dBr(EXT)BufferU2024(OPA2134)MuteQ2026, Q2027(SC3326)AttenuationR2234, R2235(220R), R2207(47R)0.5dBr0.5dBrIf load is10Kohms,attenuation is0.5dBDAC LPF(55KHz 2rd Butterworth with 16.5dB gain)U2015(OPA2134))rBd5.2(Bd0)smrVm002(Bd0From DAC C-20dBfs13dBris -23dBfs ifmode is PL2 orPL2X orNEO:613dBr(DAC)2.5dBr(EXT)Reduce 12.5dB if inputfrom DAC and Compensategain if DAC output ischangedReduce 4dB if DIALNORMis 27Reduce 2dB if input fromEXT.SW EXT. InputBufferU2012(OPA4134)LPF(1KHz 1st)U2026(OPA4134)VolumeU2038(WM8816)Main SW Output13dBr(DAC) 10.5dBr 10dBr(150mVrms)Muti-Source SelectorU2059(TC9274N-008)12.5dBr(EXT)BufferU2024(OPA2134)MuteQ2028, Q2029(SC3326)AttenuationR2236, R2237(220R), R2208(47R)10.5dBr10.5dBrIf load is10Kohms,attenuation is0.5dBDAC LPF(55KHz 2rd Butterworth with 16.5dB gain)U2016(OPA2134))rBd5.21(Bd01)smrVm236(Bd01From DAC SW-20dBfs13dBris -36dBfs ifall are "small"13dBr(DAC)12.5dBr(EXT)Reduce 2.5dB if input fromDAC and Compensate gainif DAC output is changedReduce 4dB if DIALNORMis 27Reduce 2dB if input fromEXT.3-8