Thursday, March 03, 2016

How to enter to service mode Sharp lcd tv - SHARP LC-32M400M – Service Mode – Software update – White balance adjustment – Factory reset – LCD television repair and service

Category: LCD Television repair and service 

Contents of this article 

  • How to access service mode 
  • Software update procedure 
  • Factory Reset procedure 


SHARP LC-32M400

ADJUSTMENT PROCEDURE
Entering and cancel the adjustment process mode
1) While holding down the TV/VIDEO and Volume DOWN keys at the same time, plug in the AC cord to turn on the power. (“K” standing for inspection process mode is displayed on the upper left position of the screen.)
2) Press the Channel DOWN and Volume DOWN keys at the same time. (The adjustment process mode screen appears.)
3) To cancel it, turn off the power using the Power switch or remote control.
Software upgrading. (Method D)
1) Plug off the LCD TV.
2) Insert the USB device to the USB terminal at the LCD TV.
(Make sure that the latest software is installed in the USB device.)
3) Hold the LCD TV power key and plug on the LCD TV.
4) LCD TV is on and detecting the USB device.
5) A few seconds later, the software upgrading will start automatically.
6) Let the process running & entering verification.
7) Software is successfully installed when the following appears at the end of the process.
8) Plug off the LCD TV and plug ON again as usual.
9) LCD TV is running with the latest software.
White balance adjustment
Adjustment Procedure
1) Using the remote control, set the LCD TV to adjustment mode.
2) Measure Max brightness (Lmax).
3) Calculate min. brightness (Lmin)=Lmax/5000.
4) Measure Point 2 brightness (Lhigh).
5) Set the reference value R,G,B of Point 2 (R2)=3264 x (204/P2) where P2=255 x [(Lhigh-Lmin)/(Lmax-Lmin)]1/2.2
6) Set the specified gradation for point 2, fix the most faint colour to get reference
value, adjust others 2 colour to minus adjustment for reference value of point 2.
7) Measure Point 1 brightness (Llow).
8) Set the reference value R,G,B of Point 1 (R1)=1024 x (64/P1) where P1=255 x [(Llow-Lmin)/(Lmax-Lmin)]1/2.2
9) Set the specified gradation for point 1. Set G of point 1 to the default value [(R1 x G value of point 2/R2), with fractions rounded] and adjust RB to the reference value of point 1.
10)Adjusted value is writing at [command] MSET0003.
11)Set the G of point Max. to the default value (4080 x G value of point 2/R2). Set the
R,B Max. value [Gmax-G value of point 2 + (R,B value of pint 2)].
12)Shut down the AC power.
*Initial value at RGB 2 point : 3264
*Initial value at RGB 1 point : 1024
[Adjustment Value]
Specification data by engineering dept is set as reference.
[Reference value for adjustment reference]
Equipment: Luminance meter [Minolta CA-210]


Level

Spec Data

Adjustment Spec.

Inspection Spec.

Point 2
ref.
values

204

x=0.272
y=0.277

r0.0010


r0.0020




Point 1
ref.
values

64
x=0.272
y=0.277
r0.0045
r0.0090
Factory setting
1) Setting is done with test remote control.
2) Press the “Factory Setting” key on the remote control continuously.
3) When Green background appears on screen and “K” mark disappears, setting is completed.
The followings are initialized to factory setting
1) User setting
2) Channel data (e. g. broadcast frequencies)
3) Manufacturer’s option settings
4) Password data
5) Setting values are set based on model destination