Optical / Coaxial In - Denon DRA-100 Service Manual

2.4. Optical / Coaxial In

Check the power supply voltage for the Optical/Coaxial input
circuit.
FRONT PCB
[JK802] : 3pin (OPT IN1) +3.3V
[JK803] : 3pin (OPT IN2) +3.3V
[IC801] : 14pin (COAX IN) +3.3V
Check the S/PDIF Signal DIR[IC1451] input.
MAIN PCB
[IC1451] : 33pin S/PDIF_OPT1
[IC1451] : 32pin S/PDIF_OPT2
[IC1451] : 37pin S/PDIF_COAX
2.1. To COMMON
OK
OK
NG
Check the soldering or replace the device or SMPS.
SMPS PCB ➡ MAIN PCB
[CN1002] 10,11pin +5V ➡ [IC1009] : 4pin +5V, 5pin +3.3V
FRONT PCB ➡ [BD802] : +3.3V
NG Check the soldering or replace the device or SMPS.
FRONT PCB ➡ MAIN PCB
[R805] ➡ [R814] ➡ [R1461]
[R807] ➡ [R813] ➡ [R1462]
[IC801] : 10, 11, 12, 13pin ➡ [R1453]
37
➡ [BD1018] : +3.3V
➡ [R804] : +3.3V (OPT1)
➡ [R806] : +3.3V (OPT2)
➡ [BD801] : +3.3V (COAX)