Tmds Failure Analysis – General Checking - Sony KD-43XE7 Series Service Manual

3.7.6 TMDS Failure Analysis – General Checking
TMDS
Failure Analysis
Check impedance of Resistor,
CMF (Filter)during AC OFF
HDMI1:RB4007,RB4008,L4002,L4003
HDMI2:RB4003,RB4004,L4004,L4005
HDMI3:RB4005,RB4006,L4000,L4001
[NG] Impedance ≠ 0Ω
Replace Broken
Resistor and Re-verify
[OK] Picture recovered
END
[OK] Impedance ≈ 0±5Ω
[NG] Impedance ≠ Open (High-Z)
[NG] No Picture
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
Check I2C GPIO Line impedance
to Ground during AC OFF
HDMI1: CN4001 – Pin1,3,4,6,7,9,10,12
HDMI2: CN4002 – Pin1,3,4,6,7,9,10,12
HDMI3: CN4000 – Pin1,3,4,6,7,9,10,12
Internal Main IC (SoC)
Broken (IC5000)
Replace B-Board
and Re-Verify
[OK] Impedance = Open (High-Z)
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