Chassis Adjustment; Service Menu Access; Memory Initialize - Hitachi 50VF820 Service Manual

ADJUSTMENT PROCEDURE START-UP
The 50,55 & 60 VF820/VG825 LCD rear proyection 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 I
by changing data in the Adjustment mode menu.
On pages 42-78 shows the complete parameter list
with a brief description, signal format, the adjustment
range and the initial data.
1-1 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
key then repeat the same procedure.
ADJUST MODE
▶RGB
H POSITION
V POSITION
ENBW
GHOST
VCOM
NRSH
STRIPE
S.GHOST
STREAK
Other way to access this mode is by use JIG R/C code: (9C Hex).
To escape from Adjustment Mode press " I NPUT" key on Side
panel or EXIT key of R/C to exit service adjustment mode.
1-1.1 CHANGING DATA AND SELECTING ADJUSTMENT
CODE
When the PDP set is in adjustment mode, the cursor
, 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.
, keys are used for selecting adjustment item.
MENU
SELECT
, keys are used for changing data values.
MENU key is used to advance through the adjustment
mode menus and pages.
BACK TO ADJUSTMENTS
C bus
2
**
**
**
,
EXIT
EXIT
Increase
Data Value
B. To make a selection, use the NUMBER pad on the PTV
R/C ; example : select SEINE press 69 then SELECT
the DATA shown is "EB" ; if this DATA needs to be change
, ,
press the 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 PTV set returns to
normal condition.

1-2 MEMORY INITIALIZE

1-2.1 MEMORY INITIALIZE OPER A TION
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
,
(3) Select MEMORY INIT adjust code.
(4) Activate MEMORY INIT by pressing
more than 3 seconds.
(5) Check the following process for initialization opera-
tion.
·Process of Memory Initialize operation.
① A screen is be colored blue when MEMORY INIT
start.
A screen is be colored green when MEMORY INIT
②
finish normally.
A screen is be colored black when MEMORY INIT
③
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 PTV turns ON , it will tune CH03 this is the
complete operation of Memory Initialize process.
32
LC58/LC58E
Remote Control Buttons
MENU EXIT Change
EXIT
Selection (Up)
Increase
Data Value
SELECT
Change
Selection (Down)
cursor keys several times.
,
cursor key for