Flow Chart For Malfunction - Samsung HL67A750A1FXZA Service Manual

Troubleshooting
■ Flow Chart for Malfunction
Does the TV turn on?
No
Check the Power Cord
Yes
Is LED for illumination off?
Yes
Check Logic Power
(CN9007)
Yes
12V OK?
(Pin 18)
Yes
5V OK?
(Pin 21/22)
Yes
Check Driver Power
(CN9005)
Yes
16V OK?
(Pin 2/4/6)
Yes
Operate driver in internal mode
(grounding R9010) LED On?
Yes
Check Cables connected to
DMD Board.
If necessary, replace DMD Board.
4-2
Yes
Can you see anything
on the screen?
No
1) Check the LVDS Cable
No
connected between the Main
Board and the DMD Board.
If necessary, replace LVDS Cable.
No Check Cables connected to DMD Board
(CN801 Pin 18).
If necessary, replace DMD Board.
No Check Cables connected to DMD Board
(CN801 Pin 21, 22).
If necessary, replace DMD Board.
No
Check Sub SMPS
No
Replace driver
Yes
Yes
Can you see OSD menu
running on the screen?
No
Check Cables connected to
Main Board. If necessary,
replace the Main Board
Check Cables connected to
DMD Board. If necessary,
replace DMD Board.
R9010 Gronding
Can you see Digital
Channel broadcast ?
No
Replace the Main Board
Samsung Electronics