Sony KD-55X7 E Series - +5 V Power Failure Analysis - HDMI1 and HDMI3 General Checking

3.7.3 +5V Power Failure Analysis – HDMI1 and HDMI3 General Checking
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+5V Power
Failure Analysis
Check impedance of
Varistor during AC OFF
HDMI1: VR4010
HDMI3: VR4009
[OK] Impedance ≈ 100kΩ ±5%
[NG] Impedance ≠ 100kΩ ±5%
END
Go to
“HPD Power Failure Analysis“
Page
Replace Broken Varistor
and Re-verify
[OK] Picture recovered
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
[NG] No picture
Check impedance of
Resistor during AC OFF
HDMI1: R4025
HDMI3: R4024
[NG] Impedance ≠ 1K Ω
[OK] Impedance ≈ 1K Ω
Replace Broken Resistor
and Re-verify
[NG] No picture
[OK] Picture recovered
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