Sony GN3UN - Page 63

3f.7.1 HDMI – No picture – General Checking (Continue..)
3f.7.1 HDMI
END
[OK] Picture recovered
Check impedance of series
resistor at SCL&SDA during AC OFF
HDMI1: R4008 & R4009 (I2C)
HDMI2: R4010 & R4011 (I2C)
Continue..
Series Resistor Broken.
Replace → Re-verify
[NG] Impedance ≠ 100Ω
[NG] No picture
[OK] Impedance = 100Ω
Check voltage of SCL&SDA line
HDMI1: CN4001 – Pin15&16
HDMI2: CN4000 – Pin15&16
Go to
“I2C Failure Analysis“
Page
[NG] VI2C ≠ 3.5 ~ 5.5V
[OK] VI2C = 3.5 ~ 5.5V
Check voltage of TMDS line
HDMI1: CN4001 – Pin1,3,4,6,7,9,10,12
HDMI2: CN4000 – Pin1,3,4,6,7,
9,10,12
[NG] VTMDS ≠ 2.6 ~ 3.5V
Go to
“TMDS Failure Analysis“
Page
[OK] VTMDS = 2.6 ~ 3.5V
Replace B-board &
re-verify
Escalate this issue to
R&D team
END
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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