Sony GN3UN - TMDS Failure Analysis

3f.7.6 TMDS Failure Analysis – General Checking
3f.7.6 TMDS Failure Analysis
TMDS
Failure Analysis
END
Replace Broken
Resistor and Re-verify
[OK] Picture
recovered
Check impedance of Resistor,
CMF (Filter)during AC OFF
HDMI1:RB4000,R4001,L4000,L4001
HDMI2:RB4002,R4003,L4002,L4003
Check I2C GPIO Line impedance
to Ground during AC OFF
HDMI1: CN4001 – Pin1,3,4,6,7,9,10,12
HDMI2: CN4000 – Pin1,3,4,6,7,9,10,12
Replace B-Board
and Re-Verify
[NG] Impedance ≠
Open (High-Z)
[OK] Impedance =
Open (High-Z)
Internal Main IC (SoC)
Broken (IC5000)
[OK] Impedance
≈ 0±5Ω
[NG] No Picture
[NG] Impedance ≠ 0Ω
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
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