Sony GN3UN - I2 C Failure Analysis

3f.7.5 I2C Failure Analysis – General Checking
3f.7.5 I2C Failure Analysis
I2C
Failure Analysis
END
Replace Broken
Resistor and Re-verify
[OK] Picture recovered
Check impedance of
Resistor during AC OFF
HDMI1: RB4004
HDMI2: RB4005
Check I2C GPIO Line
impedance to Ground
during AC OFF
HDMI1: CN4001 – Pin15&16
HDMI2: CN4000 – Pin15&16
Replace B-Board
and Re-Verify
[NG] Impedance ≠
105kΩ
[OK] Impedance ≈ 105kΩ ±5%
Internal Main IC (SoC)
Broken (IC5000)
Go to
“TMDS Failure Analysis“
Page
[OK] Impedance
≈ 47kΩ
[NG] No Picture
[NG] Impedance
≠ 47kΩ
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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