HITACHI 37HLX99 SERVICE MODE

HITACHI 37HLX99 SERVICE MODE

HOW TO GET TO ADJUSTMENT MODE
Chassis adjustment mode can be access 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 than pressed SELECT in order to see it; then DATA can be change if other parameter needs to change then press DOWN ARROW 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 TV set is in adjustment mode, the cursor LEFT AND RIGHT, UP AND DOWN and MENU keys of the remote control or front panel may be used as the adjustment keys.
A. Use any Hitachi remote control when making an adjustment.
 UP AND DOWN keys are used for selecting adjustment item. LEFT AND 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 R/C ; example : select DEVICE press 69 then SELECT the DATA shown is "EB" ; if this DATA needs to be change press the LEFT AND RIGHT  keys to modify, when finish press SELECT key to store the new DATA value.

C. After finishing the necessary adjustment press the R/C EXIT key or EXIT key on the side panel. Adjustment mode is released and TV 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 page of Adjust Mode by pressing remote control “Menu” key once, or with either the R/C or front panel LEFT AND RIGHT cursor keys several times.
(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.
1.A screen is be colored cyan when MEMORY INIT start.
2.A screen is be colored green when MEMORY INIT finish normally.
3.A screen is be colored red when MEMORY INIT finish abnormally.

(8) When TV turns ON , it will tune CH03 this is the complete operation of Memory Initialize process.
(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, it should be unplug AC cord. Unplug and plug AC cord and then all settings and data are updated.

The adjustment item that is affected by the memory initialize operation is shown below:
FACTORY AND SERVICE ADJUSTMENTS
Note: Perform pre heat-run for more than 20 min. before adjusting.
Sub-Contrast & Clamp Offset Adjustment
Preparation for adjustment
(1) Pre-heat at least 20 min. before the Final Adjust.
(2) Recall user menu and select ‘Video’ඎ ‘Picture Mode’ඎ
(3) Receive following signal into input3 or input4 (Component) input.

Adjustment procedure
525p Sub-Contrast, Y/Cb/Cr Clamp offset adjustment
(1) Receive following 525(480)p Signal. ‘Day(Dynamic)’ඎ ‘Reset’.

(2) Go into Service Adj. Menu and select ‘RGB’ .
(3) Press  RIGHT ARROW for over 2 seconds and have it perform automatic adjustment. When it’s completed, ‘Auto Adjusting’ on the screen will be disappeared.

25i Cb,Cr Clamp offset adjustment
Preparation
(1) Change signal format from 525(480)p to 525(480)i.
Adjustment
(1) Select ‘RGB’ of Service Adj. Menu.
Press RIGHT ARROW for over 2 seconds and have it perform automatic adjustment. When it’s completed, ‘Auto Adjusting’ on the screen will be disappeared.

 BRIGHTNESS CHECK
Preparation
(1) Start checking 20 minutes or more after the power is turned ON.
(2) Receive the color bar signal.
(3) The vertical incident illumination on the screen should be 20 lux or less.
(4) Picture Format is 16:9 standard mode.
(5) Select Day mode and reset.
Checking Procedure
(1) Check the brightness as below.

Note: If set black level is NG, readjust item Sub Contrast adj.
Measuring Conditions
(1) At the signal electric field strength 75± dBm, the specification mentioned above should be satisfied.
(2) At the input electric field 46-106dB , there should be no abnormality.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 maximum value, 100 H.
VIDEO COLOR TEMPERATURE ADJUSTMENT (HIGH)
Preparation 1
(1) Set the output of signal generator to white raster. (Ratio:100%)
(2) Component signal
Video level: 0.700Vp-p
SYNC: 0.300Vp-p
Set-up level: 0V
(3) Input white raster signal into COMPONENT input terminal of the TV 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

Adjustment
(1) Perform the following adjustment with the remote control.
(2) Set the LCD color analyzer (CA-210) 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 100.
(5) After receiving White raster signal, step down the two (or one) among Adjustment R/G/B DRIVE (HIGH) and adjust the value

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)”.
Adjustment
(1) Perform the following adjustment with the remote control.
(2) Set the LCD color analyzer (CA-210) 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 100.
(5) After receiving White raster signal, step down the two (or one) among Adjustment R/G/B DRIVE (MEDIUM) and adjust the value

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 (STD)
Preparation
(1) Same as “Video Color Temperature adjustment: (HIGH)”.
Adjustment
(1) Perform the following adjustment with the remote control.
(2) Set the LCD color analyzer (CA-210) at the center of the panel.
(3) Set color temperature to “STD”.
(4) Ensure that Adjustment R/G/B DRIVE (STD) are all set as 100.
(5) After receiving White raster signal, step down the two (or one) among Adjustment R/G/B DRIVE (STD) and adjust the value.

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 (B/W)
Preparation
(1) Same as “Video Color Temperature adjustment: (HIGH)”.
Adjustment
(1) Perform the following adjustment with the remote control.
(2) Set the LCD color analyzer (CA-210) at the center of the panel.
(3) Ensure that Adjustment R/G/B DRIVE (B/W) are all set as 100.
(4) After receiving White Raster signal, step down the two (or one) among Adjustment R/G/B DRIVE (B/W) and adjust the value.
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.