Repair Flow Chart:Trouble Condition
Green Power LED and LCD backlights are ON,but no video or OSD.
LCD backlights are ON,
but TV has NO VIDEO or OSD.
On analog board:
Is the 12V supplied from “K17 Pin 6/7”?
On digital board:
Is power 12V supllied from “K5A Pin2”?
Replace“Power board” and
“Wire harness”.
On digital board:
Is power 12V to TCON supplied
from“K7200 Pin1/2/3/4” ?
Analog board is not working.
Replace “analog board”.
Is LVDS clock output?
Confirm LVDS cable connection
and check video OSD again.
T.Cnt.Board or LCD panel is not working.
1st:Replace“T.Cnt.Board&LVDS Cable”.
If T.Cnt.board&LVDS cable do not solve
problem, then 2nd:Replace“LCD Panel”.
Digital board is not working.
Replace “digital board”.
Digit board is not working.
Replace “digital board”.
If the clock output is OK, the digital board is
normally OK, but can not be 100% sure. If
the T Cont Board &LVDS do not solve the
problem, please try the digital before ordering
a panel.
No:0V
Yes
No:0V
Yes:12V
No:0V
No:0V or 1.1V constant
Yes
Yes:12V
See TABLE *2.0
See TABLE *1.0
Page 3
(TABLE *1.0)Digital board: power 12V to Tcon
42" /46"Models
Digital board power to Tcon
Confirmation Voltage
P46841-03 Z5WP
P42841-05 Z5VT
P42841-06 Z5VV
Digital K7200 Pin1 or Pin2 or Pin3 or Pin4 12V
Note:The bandwidth of the oscilloscope and probe must be at least 100MHZ or higher to check if the clock pulse exists.
(TABLE*2.0)Main board:"LVDS Clock"Test Points
42" /46"Models
LVDS Clock on
Digital
board
P46841-03 Z5WP
P42841-05 Z5VT
P42841-06 Z5VV
K7200 Pin32 clock+
K7200 Pin33 clock-
Содержание DP46841
Страница 29: ... 24 POWER BOARD PARTS SIDE POWER BOARD SOLDER SIDE ...
Страница 35: ... 30 IC6600_C0DBZYY00485 USB Protection IC6700_C0CBAYG00009_LM1117S ADJ IC6560_C0JBAA000502_TC7SET08FU ...
Страница 36: ... 31 IC5700_C3ABSY000102_IC H5PS5162GFR S6C IC6720_C0DBAYY01122_BD9328EFJ E2 ...
Страница 41: ... 36 IC DIODE AND TRANSISTOR PIN LAYOUTS ...