Denon RCD-N9 - Analog and Digital Input Troubleshooting; Analog Input Audio Signal Check; DIR Input Signal Verification; Optical Input IC Power Supply Check

2.6. Digital In 1/2
Check Power Supply Voltages for OPTICAL Input IC.
INPUT PCB
•[JK12], [JK13]：1pin +3.3V
MAIN PCB
•[IC27]：4pin +3.3V
Check Digital Audio Data input from OPTICAL.
MAIN PCB
•[IC22]：33pin OPT1, 35pin OPT2
OK
OK
Check the solder and replace any faulty parts.
•[CN16]：1pin +3.3V on INPUT PCB
•[IC27]：IN：+5V / OUT：+3.3V
•SMPS PCB
Check the solder and replace any faulty parts.
•[CN16]：5pin OPT1, 3pin OPT2 on INPUT PCB
•[CN16]：4pin GND on INPUT PCB
•INPUT PCB [JK12], [JK13]
NG
NG
To 2.1. COMMON(signal)
2.5 . Analog In
Check Analog Audio Signal from Analog.
MAIN PCB
•[JK22]：Analog In (L_CH / R_CH)
•[IC20]： 7, 4pin：AUX(L/R)
5pin：AIN_CNT1
CNT1 [H](AUX),
Check the DIR input.
•[IC22]：47, 48：VINL / VINR
OK
OK
OK
Check the solder and replace any faulty parts.
•[JK22] on MAIN PCB
Check the solder and replace any faulty parts.
•[IC61]
•[IC28]：17pin AIN_CNT
Check the solder and replace any faulty parts.
•[C375], [C389] on MAIN PCB
NG
NG
NG
To 2.1. COMMON(signal)
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