Tuesday, December 01, 2015

HITACHI L42S601 - L42V651 SERVICE MODE INITIALIZATION AND ADJUSTMENTS

HITACHI L42S601 - L42V651 

SERVICE MODE INITIALIZATION AND ADJUSTMENTS 

ADJUSTMENT PROCEDURE START-UP
The L42S601 and the L42V651 LCD TV sets pass through adjustment procedures during the assembly process. These adjustments must be done to enssure the best performance of the LCD set for the consumer. Also, after servicing, these same adjustments must be done. The adjustments are all made through the I2C bus by changing data in the Adjustment mode menu.
HOW TO GET TO THE ADJUSTMENT MODE
Chassis adjustment mode can be accessed by pressing the R/C keys MENU + MENU + 8 + SELECT to enter adjustment mode. 

For some parameters the only way to see them is by selecting the parameter number then press SELECT in order to see it; then DATA can be changed if other parameter needs to change then press DOWN key then repeat the same procedure.
Other way to access this mode is by use JIG R/C code: (9C Hex). To escape from Adjustment Mode press “INPUT” key on Side panel or EXIT key of R/C to exit service adjustment mode.
CHANGING DATA AND SELECTING ADJUSTMENT CODE
When the LCD set is in adjustment mode, the cursor LEFT,RIGHT ,UP,DOWN  and MENU keys of the remote control or side panel may be used as the adjustment keys.
A. Use any Hitachi remote control when making an adjustment. UP,DOWN  keys are used for selecting adjustment item. LEFT,RIGHT  keys are used for changing data values. MENU key is used to advance through the adjustment mode menus and pages.
B. To make a selection, use the NUMBER pad on the LCD R/C ; example: select DEVICE press 69 then SELECT the DATA shown is "EB"; if this DATA needs to be changed press the LEFT/RIGHT keys to modify, when finish press SELECT key to store the new DATA value. normal condition.
C. After finishing the necessary adjustment press the R/C EXIT key or EXIT key on the side panel. Adjustment mode is released and LCD set returns to normal condition.
MEMORY INITIALIZE
MEMORY INITIALIZE OPERATION
NOTE: The execution of this function returns the adjustment codes to the preset values, therefore, adjustment data will be lost.
Procedure
(1) Enter Adjustment mode by the method described in sub-items 1.1 and 1.2 from item 1 (“Adjustment procedure start up”).
(2) Get to the second row of Adjust Mode by pressing R/C or side panel  DOWN cursor key once.
(3) Select MEMORY INIT adjust code.
(4) Activate MEMORY INIT by pressing  RIGHT cursor key for more than 3 seconds.
(5) Check the following process for initialization operation.
Process of Memory Initialize operation.
The screen is colored blue when MEMORY INIT start.
The screen is colored green when MEMORY INIT finish normally.
The screen is colored red when MEMORY INIT finish abnormally.
(6) Do not unplug from AC outlet until this operation is complete and do not perform any key operation either, after this operation each factory setting and all adjust mode data should reset to delivery settings automatically.
(7) After Memory Initialize, the AC cord should be unplugged. Unplug and plug the AC cord and then all settings and data will be updated.
(8) When LCD turns ON , it will tune CH03 this is the complete operation of Memory Initialize process.
Sub-Contrast Adjustment
Preparation for adjustment
(1) Pre-heat at least 2 min. before the adjustment.
(2) Recall user menu and select ‘Video’
> ‘Picture Mode’>‘Day(Dynamic)’> ‘Reset’.
(3) Receive following signal into input3 or input4(Comp) input.
Adjustment procedure
525p Sub-Contrast, Y/Cb/Cr Clamp offset adjustment
(1) Receive following 525(480)p Signal.
Adjustment signal for 525(480)p format
(2) Go into Service Adj. Menu and select ‘RGB’ .
(3)
Press  RIGHT for over 2 seconds and the TV will do automatic adjustment. When it’s completed, the
OSD will appear, during adjustment, it will disappear.
WHITE BALANCE ADJUSTMENTS
General Notes for White Balance
(1) If the incident illumination is more than 20 lux,
change the environment (location, lighting, etc.) and
ensure it to be less than 20 lux.
(2) At least one of the color drive codes must stay at its
default value, 110.
VIDEO COLOR TEMPERATURE ADJUSTMENT (HIGH)
Preparation 1
(1) Set the output of signal generator to white raster.
(Ratio:100%)
(2) Component signal (480i)
Video level: 0.700Vp-p
SYNC: 0.300Vp-p
Set-up level: 0V
(3) Input white raster signal into COMPONENT input ,terminal of the LCD set.
(4) Set user control to Day(Dynamic) mode. (Picture Mode)
(5) Confirm that the mode is set as “Factory Setting. 
Mode”.
(6) Aspect: 4:3 Expanded
(7) Allow at least 20 minutes heat-run before adjusting.
Adjustment
(1) Perform the following adjustment with the remote
control.
(2) Set the CRT color analyzer (non contact type: CA-210,
BM-5, BM-7, CA-110) at the center of the panel.
(3) Set color temperature to “HIGH”.
(4) Ensure that Adjustment R/G/B DRIVE (HIGH) are all set as 110.
(5) After receiving the White raster signal, reduce the value of two (or only one) of the adjustment parameters
R/G/B DRIVE (HIGH) and adjust to the target value shown below.
Specification Video Color temperature (HIGH)
x = 0.273 ± 0.005
y = 0.273 ± 0.005
(Color temp: 12000K-7MPCD)
At least one of the data should be 110.
Remarks
(1) Color temperature should be adjusted under the condition in which the screen is the brightest, thus the initial value for adjustment is set to its maximum.
(2) Adjustment is made by reducing brightness only. Reduce a bright color for adjustment.
(3) Video color temperature & Adjustment no. are the same, but addresses in the memory are different, thus there’s no problem.
VIDEO COLOR TEMPERATURE ADJUSTMENT (MEDIUM)
Preparation
(1) Same as “Video Color Temperature adjustment: (HIGH)”
(1) Perform the following adjustment with the remote
control.
(2) Set the CRT color analyzer (non contact type: CA-210, BM-5, BM-7, CA-110) at the center of the panel.
(3) Set color temperature to “MEDIUM”.
(4) Ensure that Adjustment R/G/B DRIVE (MEDIUM) are all set as 110.
(5) After receiving White raster signal, reduce the value of two (or only one) of the adjustment parameters R/G/B DRIVE (MEDIUM) and adjust to the target value shown below.
Specification Video Color temperature (MED)
x = 0.285 ± 0.005
y = 0.293 ± 0.005
(Color temp: 9300K)
At least one of the data should be 110.
(1) Color temperature should be adjusted under the condition in which the screen is the brightest, thus the initial value for adjustment is set to its maximum.
(2) Adjustment is made by reducing brightness only. Reduce a bright color for adjustment.
(3) Video color temperature & Adjustment no. are the same, but addresses in the memory are different, thus there’s no problem. Remarks
VIDEO COLOR TEMPERATURE ADJUSTMENT (STD)
Preparation
(1) Same as “Video Color Temperature adjustment: (HIGH)”.
Adjustment
(1) Perform the following adjustment with the remote control.
(2) Set the CRT color analyzer (non contact type: CA-210, BM-5, BM-7, CA-110) at the center of the panel.
(3) Set color temperature to “STANDARD”.
(4) Ensure that Adjustment R/G/B DRIVE (STD) are all set as 110.
(5) After receiving the White raster signal, reduce the value of two (or only one) of the adjustment parameters R/G/B DRIVE (STD) and adjust to the target value shown below.
Specification Video Color temperature (STD)
x = 0.314 ± 0.005
y = 0.323 ± 0.005
(Color temp: 6500K )
At least one of the data should be 110.
(1) Color temperature should be adjusted under the condition in which the screen is the brightest, thus the initial value for adjustment is set to its maximum.
(2) Adjustment is made by reducing brightness only. Reduce a bright color for adjustment.
(3) Video color temperature & Adjustment no. are the same, but addresses in the memory are different, thus there’s no problem. Remarks.
VIDEO COLOR TEMPERATURE ADJUSTMENT (B/W)
Preparation
(1) Same as “Video Color Temperature adjustment: (HIGH)”.
Adjustment
(1) Perform the following adjustment with the remote control.
(2) Set the CRT color analyzer (non contact type: CA-210, BM-5, BM-7, CA-110) at the center of the panel.
(3) Ensure that Adjustment R/G/B DRIVE (B/W) are all set as 110.
(4) After receiving the White Raster signal, reduce the value of two (or only one) of the adjustment parameters R/G/B DRIVE (B/W) and adjust to the target value shown below.
Specification Video Color temperature (B/W)
x = 0.335 ± 0.005
y = 0.343 ± 0.005
(Color temp: 5400K )
At least one of the data should be 110.
Remarks
(1) Color temperature should be adjusted under the condition in which the screen is the brightest, thus the initial value for adjustment is set to its maximum.
(2) Adjustment is made by reducing brightness only. Reduce a bright color for adjustment.
(3) Video color temperature & Adjustment no. are the same, but addresses in the memory are different, thus there’s no problem.