8. No Audio Output during OPT or COAX Playback
Check each part listed after "
4. Audio PCB Abnormalities and no Audio Output (Line Out, Variable Out,
".
Are waveforms output from PLD [
U3001
]?
DIGITAL PCB
[
L3005
]BCK/DBCK, [
L3004
]LRCK/DSD_DATAL, [
L3003
]PCM_DATA/DSD_DATA
When playing back a OPT or COAX signal, are digital audio wave-
forms output from DIR [
U2002
]?
DIGITAL PCB
[
R2063
]MCLK, [
R2064
]BCK, [
R2065
]LRCK, [
R2066
]DATA
Check for an OPT or COAX input malfunction and input buffer IC
[
U2007
] power supply voltage [3.3V] and input output to deter-
mine the location where the S/PDIF signal is interrupted.
There is a malfunction in communication between DIR [
U2002
] and System uCOM [
U1004
] or in the
DIR [
U2002
] unit.
If no abnormalities are apparent in the waveforms sent between DIR [
U2002
] and System uCOM
[
U1004
], replace DIR [
U2002
] or the Digital PCB board if doing so proves too complicated.
Communication waveform confirmation point of [
U3001
] and [
U1004
].
[
R3099
]C_PLD_CLK, [
R3102
]C_PLD1_CS, [
R3101
]C_PLD_MDI
Is the S/PDIF signal input to DIR [
U2002
]?
DIGITAL PCB
[
R2023
]COAX IN, [
R2039
]OPT1 IN, [
R2037
]OPT2 IN
There is a malfunction in communication between DIR [
U2002
] and System uCOM [
U1004
] or in the DIR [
U2002
] unit.
If no abnormalities are apparent in the waveforms sent between DIR [
U2002
] and System uCOM [
U1004
], replace DIR [
U2002
] or the Digital
PCB board if doing so proves too complicated.
Communication waveform confirmation point of [
U2002
] and [
U1004
]. (SPI)
[
R1151
]DIR_CE, [
R1148
]DIR_CLK, [
R1155
]DIR_DOUT, [
R1158
]DIR_DIN, [
R1142
]DIR_RESET("
Hi
"Enable)
NO
YES
YES
YES
NO
NO
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
58
