Sony KD-43X7 G Series Service Manual page 68

2.6.14 HDMI No Picture
2.6.14.4 I2C Failure Analysis
I2C
Failure Analysis
Check impedance of
Resistor during AC OFF
HDMI1: RB4001
HDMI2: RB4002
HDMI3: RB4000
[NG] Impedance ≠ 47kΩ
Replace Broken
Resistor and Re-verify
[OK] Picture recovered
END
[OK] Impedance≈ 47kΩ
[NG] HDMI1 Impedance ≠ 140kΩ ±5%
[NG] HDMI2 Impedance not Open (High z)
[NG] HDMI3 Impedance ≠ 140kΩ ±5%
[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 – Pin15&16
HDMI2: CN4002 – Pin15&16
HDMI3: CN4000 – Pin15&16
Internal Main IC (SoC)
Broken (IC5000)
Replace B-Board
and Re-Verify
[OK] HDMI1 Impedance ≈ 140kΩ ±5%
[OK] HDMI2 Impedance Open (High Z)
[OK] HDMI3 Impedance ≈ 140kΩ ±5%
Go to
"TMDS Failure Analysis"
Page
68
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