Flow Chart No.9 - Denon DCD-720AE Service Manual

FLOW CHART NO.9

Audio is not outputted normally.
Set the disc on the disc tray, and playback.
Are the analog audio signals outputted to IC82Pin(1) or IC82Pin(7)
※ DCD520AE:without IC82
IC82Pin(1) : AUDIO (L)
IC82Pin(7) : AUDIO (R)
YES
Is the "L" level MUTE line to Pins(17) of PMAD?
YES
Check A_MUTE line and service it if defective.
IC11 Pin(17) F_MUTE H : mute / L : play
NO
Check AUDIO+V(+6V_A) and AUDIO-V(-6V_A) line and
service it if defective.
DSP (IC21)Check the DAC in DCD720AE(IC64) / DAC
in DCD520AE(IC65) digital audio data signal of a DSP
(IC21).
(DAC_BCK.LRCK,DATA)
Check the DAC in DCD720AE(IC64) / DAC in
DCD520AE(IC65) control signal of a microcomputer
(IC11). (MS/DAC_FLT,MC/DAC_FLT,MOSI)
Check DAC in DCD520AE:IC65(IC64)_Vcc(+3.3V_A or
+3.3V_D) line and service it if defective.
Replace IC64.
43
YES
YES
YES
YES