Samsung N64D, Service Manual

Page: 72 / 119

4-13
4. Troubleshooting
4-1-5. No Video (Tuner DTV)
Symptom No video on Tuner input.
-
Major
checkpoints
Check your source on the TV.
Check your source content.
Check all connections.
-
-
-
Diagnostics
40” 52”
No
Check the D-TV source.
No Does the DC TU5V_PW, TU33V_PW
appear at #2, #4 Pin of Tuner?
Power indicator LED is off.
Lamp(Backlight) on, no video
No
Check the connection of RF cable
Change the Main PCB
40” : BN44-00264A
52” : BN44-00267A
Yes
Check IC201 (Saturn4)
Change the Main PCB
40” : BN44-00264A
52” : BN44-00267A
No
No
Does the digital data appear at
Pin #16,17,34,35 (LVDS Data clk)
of LVDS connector?
Check the ‘signal strength’
in Self Diagnosis menu
Strength is enough?
No
Please, Contact Tech support
Check the LVDS cable?
Replace the LCD panel?
Yes
Yes
Input the RF cable properly.
Yes
Yes
2
Check a set
in the ‘Stand-by mode’.
Caution Make sure to disconnect the power before working on the IP board.