Saturday, January 31, 2015

LG 32LE5700 ZC - 42LE5700-ZC SERVICE MODE AND AUDIO AMPLIFIER CIRCUIT


SERVICE MODE

Press “Menu”, “1”, “2”, “4”, 7” and “5” keys on a remote.

Software version upgrading.
USB DOWNLOAD
1) Press “Menu” Key and select “OK” key after focusing “SETUP” item
2) Press Numeric Keys like following sequences : 1 – 2 – 4 – 7 – 5
3) Factory menu will be displayed
4) press “OK” key after focusing “USB Check” item, then “USB Check” item value will be changed to “TRUE
5) Copy SW upgrade image “xxxxxx.hdf” to an USB memory stick.
Model Name and  Upgrade image file name
32/42LE5700 
à LE5700.hdf
32/37/42/47LE5400 
à LE5400.hdf
32/42LE5750 
à LE5750.hdf

6) Connects USB memory stick to the side jack(USB IN) of TV.
7) Turn Off and On TV with using AC-Power.
8) After Turning on TV, Software upgrade will be done automatically.
9) After upgrading SW, turn off TV and wait 20 second
10) Turn on TV, Check SW version in Diagnostics of SETUP.
Function Check
1) Check display and sound.
2) Check Input and Signal items.(cf. work instructions)
a) TV & DTV
b) AV(SCART, CVBS)
c) COMPONENT(480i)
d) RGB(PC : 1024 x 768 @60Hz)
e) HDMI
f) PC Audio In
3) Display and Sound Check is executed by Remote control.
EDID DOWNLOAD
Panel Setting
a) You should change the panel size by going to the Factory Mode, press “Menu”, “1”, “2”, “4”, 7” 
and “5” keys on a remote.
b) You have to select 32” or 37”, 42”, 47” panel in Factory mode.
32LE5400-ZA : Panel Select à “LC320EUH_SCAx”
32LE5700-ZC : Panel Select 
à “LC320EUH_SCAx”
32LE5750-ZC : Panel Select 
à “LC320EUH_SCAx”
37LE5400-ZA : Panel Select 
à “LC370EUH_SCAx”
42LE5400-ZA : Panel Select 
à “LC420EUH_SCAx”
42LE5700-ZC : Panel Select 
à “LC420EUH_SCAx”
42LE5750-ZC : Panel Select 
à “LC420EUH_SCAx”
47LE5400-ZA : Panel Select 
à “LC470EUH_SCAx”
EDID Setting
a) You should change the panel size by going to the Factory Mode, press “Menu”, “1”, “2”, “4”, 7” and “5” keys on a remote.
b) You have to select “Engineering Menu” in Factory mode.
c) Enter “ EDID Download” by pushing “OK” key.

FRC DOWNLOAD
a) You should change the panel size by going to the Factory Mode, press “Menu”, “1”, “2”, “4”, 7” and “5” keys on a remote.
b) You have to select “Engineering Menu” in Factory mode.
c) Enter “ FRC Download” by pushing “OK” key.

V-COM Adjust(Only LGD Module)
a) Why need Vcom adjustment?# The Vcom (Common Voltage) is a Reference Voltage of Liquid Crystal Driving.à Liquid Crystal need for Polarity Change with every frame.
b) Adjust sequence
# You should change the panel size by going to the Factory Mode, press “Menu”, “1”, “2”, “4”, 7” and “5” keys on a remote.
# You have to select “Miscellaneous” in Factory mode.
# Enter “ V-Com” by pushing “OK” key.


As pushing the right or the left key on the remote control, and find the V-COM value which is no or minimized the Flicker.
(If there is no flicker at default value, Press the exit key and finish the VCOM adjustment.)
AUDIO AMPLIFIER CIRCUIT 
CLICK ON THE IMAGE TO ZOOM IN