Denon RCD-M38

39
2. No Sound,Noise generated
2.1. CD PLAY
CheckPowerSupplyVoltagesforCD.
MCU_CD B'D
•D+3.3V[IC51]:2pi3.3VOK?
•+1.5V[IC52]:2pi1.5VOK?
CheckPowerSupplyVoltagesforDAC.
INPUTB'D
•[IC15]:14pinVDD5VOK?
Check Reset signal for CD.
MCU_CD B'D
•[IC16]:69pin/RST"H"levelO.K.?
•[IC41]:61pinDSP_RST"H"levelO.K.?
•[IC11]:58pinCD_DSP_RST"H"levelO.K.?
CheckResetsignalforDAC.
INPUTB'D
•[IC15]:5pinAKRST
"H" level O.K.?
Check Oscillation waveform.
MCU_CD B'D
•[IC16]:49pinXO
16.9344MHzOK?
Check Oscillation waveform.
MCU_CD B'D
•[IC41]:73pinX2
9.0MHzOK?
CheckClockSignalforDAC.
INPUTB'D
•[IC15]:1pinMCLK
16.9344MHzOK?
CheckcontrollsignalforDAC.
INPUTB'D
•[IC15]:6,7,8pinAKCS,AKCLK,AKCON
CheckPowerSupplyVoltagesforCD.
MCU_CD B'D
•[CN98]:1pin+8VM
•[CN98]:5pinUSB+9V
•[IC51]:1pinUSB+5V
CheckSoldering.
•MCU_CDB'D [CN98]:1,3pin
  +8VM,USB+9V
•POWERB'D
Check Parts
•[IC71]
CheckSoldering.
•[IC51]onMCU_CDB'D
•[IC52]onMCU_CDB'D
Check Parts
•[IC51],[IC52]
CheckSoldering.
•[CN72]:9pinSW+5V
•POWERB'D
CheckSoldering.
•[IC11]:58pinCD_DSP_RSTonMCU_CDB'D
•[IC41]:61pinDSP_RSTonMCU_CDB'D
CheckSoldering.
•[IC11]:25pinDAC_RSTonMCU_CDB'D
CheckSoldering.
•[X201]onMCU_CDB'D
CheckSoldering.
•[X401]onMCU_CDB'D
CheckSoldering.
•[IC16]onMCU_CDB'D
•[WN12]onMCU_CDB'D
•[WF12]onINPUTB'D
CheckSoldering.
•[IC11]onMCU_CDB'D
•[WN12]:6,7,8pinonMCU_CDB'D
 DAC_CE,DAC_CLK,DAC_CDTI
•[WF12]onINPUTB'D
NG
NG
NG
NG
NG
NG
NG
NG
NG
OK
OK
OK
OK
OK
OK
OK
OK
OK