Samsung HT-C550 Service Manual page 64

4-1-3 Composit (Video out)
Composit (Video out)
1
Check if VDAC output is
measured at the pin 77 of
IC10 ES8398
Yes
Check if output
is measured at the pin 14
of IC36 THS7374
Yes
2
Check if composite video output is
measured at the JA1.
Samsung Electronics
Check MPEG output
No
 Refer to wave pattern
image of Fig. 4-5.
Check Video switch.
No
3.3V is measured at the pin
Check JACK Output
No
 Refer to wave pattern
image of Fig. 4-6.
Check if VDD of 3.3V
is measured at the pin 82,
78, 72 of IC10
Yes
Replace the IC10 IC
Check if VDD of
10 of IC36.
Yes
Replace the IC36.
Check the JA1 connectivity
and replace.
Troubleshooting
No
Check if the pin 7, 8
of IC23 are 3.3V.
Replace the IC23 IC.
No
Check 3.3V power lines
from IC23 to IC36.
4-7