Sony GN3UN - HDMI ARC Failure

3h.2 Troubleshooting Detail Audio Problem
3h.2.6.1 HDMI ARC Failure
Confirm Source (Player)
ARC Condition/Capability
HDMI ARC
Failure
[OK] Source Support ARC &
ARC Source function Normally
[NG] Source Not Support ARC /
ARC Source not function Normally
Bravia Sync (CEC)
TV setting
[NG] CEC setting Off
[OK] CEC Setting On
Factory Reset &
Change Proven OK
HDMI cable
Physical
appearance Check On
HDMI connector
[NG] Connector abnormal
[NG] ARC not functioning
HDMI Connector Broken.
Replace & Re-verify
[OK] Connector no abnormality
Resistor Broken.
Replace & Re-verify
[NG] R4018 ≠ 180Ω
[OK] ARC functioning
Replace B-Board
And Re-verify
END
[OK] R4018 ≈ 180Ω ±5%
[NG] ARC not functioning
[NG] ARC not functioning
[OK] ARC functioning
[OK] ARC functioning
[OK] ARC functioning
Checking condition:
- TV ON & HDMI Source ON except if the flow mentioned is AC OFF.
- TV HDMI input connected to HDMI source (Player etc.)
- TV Input Selection: HDMI
Turn TV Bravia Sync
“On”
Change to CEC
Compatible source
[NG] CEC not functioning
Check impedance
Of R4018 Resistor
during AC OFF
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