Sony KD-43X720E - 3.7.5 I2 C Failure Analysis - General Checking

3.7.5 I2C Failure Analysis – General Checking
63
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
I2C
Failure Analysis
END
Replace Broken
Resistor and Re-verify
[OK] Picture recovered
Check impedance of
Resistor during AC OFF
HDMI1: RB4001
HDMI2: RB4002
HDMI3: RB4000
Check I2C GPIO Line
impedance to Ground
during AC OFF
HDMI1: CN4001 – Pin15&16
HDMI2: CN4002 – Pin15&16
HDMI3: CN4000 – Pin15&16
Replace B-Board
and Re-Verify
Internal Main IC (SoC)
Broken (IC5000)
Go to
“TMDS Failure Analysis“
Page
[OK] Impedance≈ 47kΩ
[NG] No Picture
[NG] Impedance ≠ 47kΩ
[
OK] HDMI1 Impedance ≈ 140kΩ ±5%
[OK] HDMI2 Impedance Open (High Z)
[OK] HDMI3 Impedance ≈ 140kΩ ±5%
[NG] HDMI1 Impedance ≠
140kΩ ±5%
[NG] HDMI2 Impedance
not Open (High z)
[NG] HDMI3 Impedance ≠
140kΩ ±5%
63