Samsung HT-BD1255 Service Manual page 45

4-1-8 NO LOGO HDMI
accords with cable connection and
Samsung Electronics
No Logo HDMI
Video selection
TV mode?
Yes
Clock, Data and Sync from
Pin 56~94 from IC18.
 Refer to wave pattern
Yes
image of Fig. 4-7.
Pin 51 of IC18 is High?
(2V ~ 5V)
Yes
Data output from IC18?
(Pin 30, 31, 33, 34, 36, 37,
39, 40)
 Refer to wave pattern
Yes
image of Fig. 4-9.
HDMI Cable Error
No
Check the Video select, cable
connection, TV mode
No
Check U1 Power Input,
Y1 Oscillation, Memory interface

No
Check IC18 connector and HDMI
cable connection
No
Check IC18 power input and
peripheral devices
Troubleshooting
Refer to wave pattern
image of Fig. 4-8.
4-19