Hitachi 50VF820 - 50" Rear Projection TV, Service Manual

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NOTE: (1) If there is a different value than shown in I2C Parameter List, for
fixed data, adjust it using , buttons (only in this case
)
* JIG. R/C FACTORY PRESET CODE:92
MEMORY INITIALIZE and FACTORY PRESET
ITEM MEMORY
INITIALIZE
FACTORY RESET REMARKS
H POSITION ADJUST DATA INITIALIZE NOT INITIALIZE
V POSITION ADJUST DATA INITIALIZE NOT INITIALIZE
RGB(480p) ADJUST DATA INITIALIZE NOT INITIALIZE
SETTING DATA FOR EACH DEVICE INITIALIZE NOT INITIALIZE
BBE EFFECT SETTING DATA INITIALIZE NOT INITIALIZE
AUDIO AGC SETTING DATA INITIALIZE NOT INITIALIZE
V CHIP RATING SETTING DATA INITIALIZE NOT INITIALIZE
CCD SETTING DATA INITIALIZE NOT INITIALIZE
FACTORY RESET ITEM
INITIALIZE INITIALIZE
LAMP TIME INITIALIZE INITIALIZE
Accumulate TIME INITIALIZE NOT INITIALIZE
GHOST ADJUST DATA INITIALIZE NOT INITIALIZE
FLICKER ADJUST DATA(V.COM) INITIALIZE NOT INITIALIZE
NRSH ADJUST DATA INITIALIZE NOT INITIALIZE
COLOR UNIFORMITY NOT INITIALIZE NOT INITIALIZE
GAMMA CORRECTION NOT INITIALIZE NOT INITIALIZE
V.REF (EPSON PANEL ONLY ) NOT INITIALIZE NOT INITIALIZE
Automatic Power saving- Yes/No
Set to “No”
for heat-run
Set to Yes
( 8 ) When PTV turns ON , it will tune CH03 this is the
complete operation of FACTORY RESET process.
·Process of FACTORY RESET operation.
A screen is be colored MAGENTA when FACTORY
RESET start.
A screen is be colored green when FACTORY
RESET finish normally.
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
①
②
③
are updated.
1-3 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
G
,
H cursor keys several times.
(3) Select
FACTORY RESET
adjust code.
(4) Activate
FACTORY RESET
by pressing E cursor key
for
more than 3 seconds.
(5) Check the
following process for FACTORY RESET
operation.
1-4 FACTORY AND SERVICE ADJUSTMENTS
The adjustment item that is affected by the memory
initialize operation is shown below:
II Final ASSEMBLY ADJUSTMENT
2 - 1 PRE HEAT RUN CONDITION
Heat run should be performed with moving picture or no signal.
And disable side panel or
top/bottom panel.
Do NOT use stock market quotation, computer graphics,
and other fixed (non-moving) image.
Table 2 .1 Final adjustment order
Order Adjustment Item Signal
1
SUB CONTRAST
ADJUSTMENT
(RGB) White Raster 480i,720P
2 RASTER POSITION ADJUSTMENT Circle pattern signal.
3 GHOST ADJUSTMENT
4 FLICKER ADJUSTMENT
5 NRSH ADJUSTMENT
6 White Balance (GAMMA) ADJUSTMENT
7 WHITE UNIFORMITY ADJUSTMENT
8 DOT STRIPE CHECKING and ADJUSTMENT
9 SUB GHOST CHECKING and ADJUSTMENT
10 HORIZONTAL CROSS TALK CHECKING
and ADJUSTMENT
11 LAMP DOOR PROTECTION OPERATION
CHECK
12 LAMP HOLDER PROTECTION OPERATION CHECK
13 HIGH TEMPERATURE PROTECTION
OPERATION CHECK
14 TEMPERATURE SENSOR OPERATION CH
E
CK
15 HDMI ADJUSTMENT / EDID DATA
INSTALLATION
16
17
18
19
20
2-2
SUB-CONTRAST ADJUSTMENT
Preparation
Receive Sub-contrast adjustment signal (Fig. 1).
Adjustment
(1) Select ‘SUB CONTRAST’ of Service Adj. Menu.
Press E for over 2 seconds and have it perform
automatic adjustment. When it’s completed, ‘Auto
Adjusting’ on the screen will be disappeared.
V
1
V
3
V
2
Fig. 1
Full White
(RF Input ANT A))
V
1
=1.0 Vp-p (when
V
2
=100IRE with
V
3
=7.51IRE)
(
Y P
B
P
R
Input
720p,1080i
)
V
1
=1.0 Vp-p (when
V
2
=100IRE with
V
3
=7.51IRE)
LC58/LC58E
BACK TO ADJUSTMENTS
33