Sony KD-43X7 G Series Service Manual page 61

2.6.14 HDMI No Picture
2.6.14 HDMI – No picture – General Checking (Continued)
Continue..
Check impedance of series
resistor at SCL&SDA during AC OFF
HDMI1: R4004 & R4007 (I2C)
HDMI2: R4005 & R4008 (I2C)
HDMI3: R4003 & R4006 (I2C)
[OK] Impedance ≈ 100Ω±5%
Check voltage of SCL&SDA line
HDMI1: CN4001 – Pin 15 & 16
HDMI2: CN4002 – Pin 15 & 16
HDMI3: CN4000 – Pin 15 & 16
[OK] VI2C = 3.5 ~ 5.5V
Check voltage of TMDS line
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,
[OK] VTMDS = 2.6 ~ 3.5V
Replace B-board &
Escalate this issue to
R&D team
[NG] Impedance ≠
[NG] VI2C ≠ 3.5 ~ 5.5V
[NG] VTMDS ≠ 2.6 ~ 3.5V
9,10,12
re-verify
END
Series Resistor Broken.
Replace → Re-verify
100 Ω±5%
[NG] No picture
"I2C Failure Analysis"
"TMDS Failure Analysis"
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
[OK] Picture recovered
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SYS SET