Service manual

CONFIDENTIAL – DO NOT COPY
Page10-19
File No. SG-0174
TROUBLE OF DDC READING
Analog DDC OK?
Start
No
Yes
No
Digital HDMI1 DDC OK?
Support DDC2B
1.Analog cable ok?
2.Voltage of +5V_BUF ok?
3.Check U21
4.Is compliant protocol?
Support DDC2B
1.HDMI cable ok?
2.Voltage of VCC5_E2P_2ok?
3.Check U44
4.Is compliant protocol?
Yes
No
Digital HDMI2 DDC OK?
Support DDC2B
1.HDMI cable ok?
2.Voltage of VCC5_E2P_1 ok?
3.Check U37
4.Is compliant protocol?
End