XOCECO LC-42R27, Service Manual

Page: 26 / 43

24
2. With backlight, without picture
Does remote control
and key of the unit
operate?
Does not picture
of all channel
Which no picture
Enter the factory
menu, the CLEAR
EEPROM
adjustment after,
turn off the unit,
and check if the
picture is normal
when turn on.
Replacing CPU assy
Display OSD?
Check
LVDS
cord
Does N21
(pin5-8)
output
18V?
Check FU1
Replacing
N21
Does R223 and
R216-R219
output signal?
Replacing
CPU assy
Replacing
N34
Check the
pin4 and
pin8 of
N24 has
H-V sync? Check if C16
has SOG
signal
Check if the pin1 and pin5 of
N24 has input signal
Replacing N24
Check if the pin2 and pin3
of N4 has input signal
Replacing N4
Check the
N10
input
and output
Replacing
CPU assy
Does
R70-R73
input signal
Replacing N7
No
Yes
Yes
No
Yes
No Yes Yes No
Yes
No Yes
No
Yes
No
Yes
No
Yes
No
No Yes
HDMI
VGA
YPBPR
TV/VIDEO
Main
picture or
sub
picture?
Check if R74, R75 has
output signal
No
Replacing N8
Check the N35
and N36 input
and output
No
Yes
Yes
Main
picture Sub
picture