HITACHI 50V720 SERVICE MODE

HITACHI 50V720 SERVICE MODE

HITACHI 50V720 

LCD PROJECTION TELEVISION SERVICE MODE 

ADJUSTMENT PROCEDURE START-UP
The 50V720 LCD rear projection television sets pass through adjustment procedures during the assembly process. These adjustments must be done to assure the best performance of the LCD set for the consumer. Also, after servicing, these same adjustments must be done. Most of the adjustments are made by the I2C bus
by changing data in the Adjustment mode menu.
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” 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 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 LCD  R/C ; example : select SEINE 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. 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 page of Adjust Mode by pressing remote control “Menu” key once, or with either the R/C or front panel UP AND DOWN 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 blue when MEMORY INIT start.
2.A screen is be colored green when MEMORY INIT finish normally.
3.A screen is be colored black 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, it should be unplug AC cord. Unplug and plug AC cord and then all settings and data are updated.

(8) When LCD turns ON , it will tune CH03 this is the complete operation of Memory Initialize process.

FACTORY RESET OPERATION
NOTE: The execution of this function returns the adjustment made by the customer , this will return all the adjustments to the original shipping conditions.

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 UP, DOWN cursor keys several times.
(3) Select FACTORY RESET adjust code.
(4) Activate FACTORY RESET by pressing RIGHT cursor key for more than 3 seconds.
(5) Check the following process for FACTORY RESET operation.

Process of FACTORY RESET operation.
1.A screen is be colored MAGENTA when FACTORY RESET start.
2.A screen is be colored green when FACTORY RESET finish normally.
3.A screen is be colored black when FACTORY RESET 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 FACTORY RESET, it should be unplug AC cord. Unplug and plug AC cord and then all settings and data are updated.

(8) When LCD turns ON , it will tune CH03 this is the complete operation of FACTORY RESET process.