
Repair Flow Chart:Trouble Condition
Green Power LED and LCD backlight is ON, but no video or OSD.
LCD backlight is ON,
but TV has NO VIDEO or OSD.
For Main board:
Is the 12V supplied from “K8B Pin 6/7”?
Replace“Power board” and
“Wire harness”.
Is LVDS signal working?
(see TABLE*1.0)
Confirm LVDS cable connection
and then check video or OSD again.
T-Con Board or LCD panel can not work.
1st:Replace“T-Con Board&LVDS Cable”.
If T-Con board&LVDS cable has no
problem, then 2nd:Replace“LCD Panel”.
Main board can not work.
Replace “Main board”.
If LVDS signal output is OK, the Main board is
normally OK, but can not be sure. If
the T-Con Board & LVDS has no problem,
please try the Main Board before changing
the panel.
No:0V
No:0V or 1.1Vconstant
Yes
Yse:12V
Page 3
(TABLE*1.0)Main board:"LVDS Clock"Test Points
42" Models
LVDS Clock on Main board
P42142-00 Z5GH
P42142M-00 Z5GHM
P42142-02 Z5GK
P42142M-02 Z5GKM
K5LV Pin10 clock+
K5LV Pin8 clock-
Note:The bandwidth of the oscilloscope and probe must be at least 100MHZ or higher to check if the clock pulse exists.
Содержание DP42142
Страница 36: ... 30 䎳䎲䎺䎨䎵䎃䎥䏏䏒䏆䏎 䎃 䎃䏉䏒䏕䎃䎸䎶䎕䎭 BLOCK DIAGRAM POWER LINES ...
Страница 40: ... 34 IC6600_C0DBZYY00485 USB Protection IC6700_C0CBAYG00009_LM1117S ADJ IC6560_C0JBAA000502_TC7SET08FU ...
Страница 41: ... 35 IC5700_C3ABSY000102_IC H5PS5162GFR S6C IC6720_C0DBAYY01122_BD9328EFJ E2 ...
Страница 46: ... 40 IC DIODE AND TRANSISTOR PIN LAYOUTS ...