Hitachi ULTRAVISION L42S504 User manual

Caution: Be sure to read this manual before servicing. To ensure safety from fire, electric shock, injury, harmful
radiation and materials, various measures are provided in this LCD TV. Be sure to read cautionary items described
in the manual before servicing. These servicing instructions are for use by qualified service personnel only. To
reduce the risk of electric shock, do not perform any servicing other than that described in the operating instructions
unless you are qualified to do so.
Service Warning
1. Replacement work should be started after the Panel Module and the AC/DC Power supply have become
sufficiently cool.
2. Special care should be taken when working near the display area in order not to damage its surface.
3. The Panel Module should not be touched with bare hands in order to protect its surface from blemishes and
damage.
4. It is recommended that you use clean soft gloves during the replacement work in order to protect not only the
display area of the Panel Module but also yourself.
Initial Edition 2010-2 v1
L42S504
HITACHI TV
HITACHI
Schematic Diagram……...………………………...………16
Connection Diagram……..……….………….……..……..31
Main Parts View.……..……….………………....…….......32
PCB Layout…………..………………………....……….....33
Exploded View…………..………………..…….................39
Parts List………...…..……..............................................41
Features…….……….…........................................……......3
Dimensions………..……..……………………………………4
General Specification...................................…………........5
Firmware Upgrade.………….………….……..………..........6
Adjustment…….…………..………..….………..….….….....7
Troubleshooting…………...…………………….…….........10
Block Diagram.........………………...………….………......14
Table of Contents
- NOTICE-
All warranty parts are provided through
Hitachi Customer Service.
All Servicers should call:
800-654-7013
Updated: 073010 OR

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Caution for Safety
Please read this page before repair the TV.
The following safety precautions are designed to help you stay safe and prevent accidents during the repair work.
●Please take note of these cautionary flags.
Warning This means "Potential to sustain injury or even death."
Caution This means "Potential to sustain breakage or irreparable damage."
●Also note these cautionary icons.
This means "CAUTION" This means "MUST"
This means "POTENTIAL
ELECTRIC SHOCK" This means "DO NOT"
WARNING
■Follow instructions. ■Must use same types of wires and components.
The cabinet, chassis, and labels
are parts that require attention.
You must follow the caution notes
and safety instructions presented
throughout this User Manual to
prevent damage to them or injury
to yourself.
The TV uses special tubes and
tapes made from insulated
materials. Moreover, some
materials are kept from making
contact with the PWB for the sake
of safety. Internal leads are kept
from hot parts or high voltage
parts by means of clamps or
other measures. As such, you
must restored these parts to their
original conditions in order to
prevent electric shock or fire.
■Prevent electric shock.
Exercise caution while working
on the device as the TV contains
high voltage parts and supply. It
is possible to sustain severe
injury or death if you accidentally
touch the wrong parts. You must
disconnect the power supply
while servicing, reassembling, or
change parts. If you touch a live
connection it is possible to
sustain severe injury or death.
■Perform safety check when done.
Every part (such as removed
screws, components, and wiring)
must be restored to their prior
conditions after servicing. Be
sure to check everything that was
repaired for damage or mistakes.
Also measure the insulated
impedance with a meg-ohm
meter to confirm that the
impedance value is more than 4M
ohm. If the impedance value is
less than 4M ohm, then electric
shock or fire may result.
■Use recommended components.
Use only the recommended
components or components that
structurally identical to the
originals. This is to ensure safety
and reliability. Pay special
attention to parts in the parts list
and circuit diagrams marked with
. If you use
non-recommended components,
then electric shock or fire may
result.

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PRECAUTIONS
●Cleaning the TV’s LCD screen panel
Before cleaning the TV, turn it off and disconnect the power plug from the power outlet. To prevent scratching or
damaging of the LCD screen face, do not knock or rub the surface with sharp or hard objects. Clean the screen with
a soft cloth moistened with warm water and dry with a second soft cloth. If it is not enough, then use a cloth with mild
detergent. Do not use harsh or abrasive cleaners.
●Cleaning the TV's cabinet
Use a soft cloth to clean the TV's cabinet and control panel. When excessively soiled, dilute a neutral detergent in
water, wet and wring out the soft cloth in it, gently clean the cabinet, and then wipe it down with a dry soft cloth.
Never use acid/alkaline detergents, alcoholic detergents, abrasive cleaners, powder soaps, OA cleaners, car wax,
glass cleaners, and so on. They will cause discoloration, scratches or cracks.
Features
●Enhanced definition LCD display panel
This specification applies to the 42.0 inch Color TFT-LCD Module T420HW06 V5. This LCD module has a TFT
active matrix type liquid crystal panel 1,920x1,080 pixels, and diagonal size of 42.0 inch. This module supports
1,920x1,080 mode. Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arranged in vertical
stripes. Gray scale or the brightness of the sub-pixel color is determined with a 8-bit gray scale signal and Frame
Rate Control (FRC) for each dot.
The T420HW06 V5 has been designed to apply the 10-bit 2 channel LVDS interface method. It is intended to
support displays where high brightness, wide viewing angle, high color saturation, and high color depth are very
important.
●New High Gloss Black Frame
●(4) HDMI® (V.1.3 with CEC) - 1080p60, 1080p24 Input Compatible
●New Multi-Function Remote Control
●120Hz 1080p Perfected
●Reel 120 Motion Correction
●Dynamic/Standard/Movie/Custom/Game/Pro-Day/Pro-Night Picture Memories
●3 Preset Color Temperatures
●Game Mode
●Calibration Menu

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Dimensions

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General Specification
Inputs
Power Input: AC 120V, 60Hz
Power Consumption
Maximum Power: 220 W, 1.83 A
Antenna Input Impedance: 75 Ohm
Channel Coverage: 191ch.
VHF-Band: 2~13; UHF-Band: 14~69
CATV Mid Band: A5~A1, AI
Super Band: J-W; Hyper Band: W+1 - W+28; Ultra Band: W+29 - W+94
Television System: NTSC Standard, ATSC Standard (8 VSB, 64-QAM,
256-QAM)
Video: 1.0Vp-p, 75 Ohm
S-Video
Luminance(Y): 1.0Vp-p, 75 Ohm; Chrominance(C): 0.286Vp-p, 75 Ohm
Component Video
Luminance(Y): 1.0Vp-p, 75 Ohm; Chrominance(Pb/Pr): 0.7Vp-p, 75 Ohm
Audio Input Impedance: more than 10k Ohm
Audio Input Sensitivity: 300mVrms
HDMI: (19 PIN)
Video
Display Resolution: 1920 x 1080p
Wide Viewing Angle
Color Temperature Presets: High, Standard and Medium
Multiple Screen Fill Modes: (Auto/4:3/16:9/Zoom 1/Zoom 2/Full)1
4MB 10-bit 3D Y/C Comb Filter
Picture Modes: Dynamic, Standard, Movie, Custom and Game, Pro-Day,
Pro-Night
Audio
CONEQTM Sound Quality
MTS Stereo/SAP
4 Sound Modes (Custom, Standard, Movie, News)
Rated Output Power: 12W+12W
Inputs/Outputs
Wideband Component Y, Pb, Pr
Composite Video
S-Video
Antenna (RF)Input
Audio Output
Optical Output
HDMI
USB Multimedia/Upgrade Slot
RGB Input
RGB Audio Input
Phone Jack for Headphones

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Firmware Upgrade
Equipments and materials
1. TV remote control
2. AC power 110V/ 60Hz
3. Flash storage
Preparations
Use PC to write software to a flash storage, press “on” button to start the TV. (Take L46S603 for example)
1. Insert the flash storage into the USB port, and you will see a picture in which you can choose “YES” or “NO”
(Picture1), you choose “YES”, and then the software will update automatically. (Picture 2)
2. After software update is finished, you put out the flash storage and restart the TV.
3. Press “menu+1999+select”, check whether software version is ok. (Picture 3 the fifth row)
Picture 1
Picture 2
Picture 3
Important Service Notice:
We recommend you install latest available firmware before hardware replacement. Check service
web site (www.hitachiserviceusa.com) for latest firmware version and availability.

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Adjustment
1. ADC Adjustment
Ⅰ. In the TV mode adjust volume to zero, press menu key and then press number key 1 Æ9 Æ9 Æ9. It will
achieve the factory mode. Select the item of White Balance and press right key to enter it.
Change TV, press the item “Current Source” to Component mode and change signal to 1080i mode, press the item
“Auto Color”; Change TV, press the item “Current Source” to PC mode and change signal to PC TIMING
137(1024X768) Pattern 147 (16 Grays), press the item “Auto Color”.
2. White Balance, Luminance Adjustment
Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.
Before started adjust white balance, please set the Ca210 Channel to 05 Channel and set it’s mode to xyLv mode.
Color Temp. Cold Normal Warm
HDMI Mode
x 272 285 313
y 278 293 329
Y Panel Max Luminance
Note: The tolerance of the Cold color coordinates should be less than ± 10; The tolerance of the Normal
color coordinates should be less than ± 20; The tolerance of the Warm color coordinates should be less than
± 20;
How to setting the Ca210 channel, you can reference to Ca210 user guide or simple use the “Memory CH” up or

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down to set the channel to 05 channel, and use the “Mode” key to set the mode to xyLv.
Following is the procedure to do white-balance adjust
Note: We can use the HDMI white balance adjustment to cover the white balance of all source modes, this
method is meeting to the Zoran 785 software.
HDMI Mode:
Ⅰ. In the TV mode adjust volume to zero, press menu key and then press number key 1 Æ9 Æ9 Æ9. It will
achieve the factory mode. Select the item of White Balance and press right key to enter it.
Ⅱ. Before to adjust the white balance, please press the factory mode OSD of “Reset” to reset all white
balance factory setting.
In the White Balance you can adjust 8 items.
1> R Offset, G Offset, B Offset ÆR, G, B Offset adjust.
2> R Gain, G Gain, B Gain ÆR, G, B Gain adjust.
3> ZR-Bright adjust;
4>ZR-Contrast adjust;
5>ZR-T ÆColor Temp adjust;
Ⅲ. Gain adjustment:
A. Adjust Cool color-temperature:
1. Set the pattern generator to pattern 104 or 0 IRE pattern. And adjust the Item “ZR-Bright” to min luminance.

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2. Switch the Ca210 to xyLv-mode (with press “MODE” button)
3. Switch the Ca210 channel to Channel 05 (with up or down “MEMORY CH” button)
4. The LCD-indicator on Ca210 will show x =272, y =278, Lv can adjust to max luminance.
5. Use the item R Offset and B Offset adjust to Adjust black balance: use 20 IRE(Pattern 190) signal, and adjust the
black balance, until the Ca210 show x =272, y =278.
6. Use the item R Gain and B Gain to adjust white balance: use 100 IRE (Pattern 105) signal, and adjust the white
balance, until the Ca210 show x =272, y =278.
7. Adjust item “ZR-Contrast” to check color temperature is saturation or not: Add by 7 steps and then to adjust the
item R Gain and item B Gain to check the color temperature is saturation or not, until is saturation.
8. Enter the item “Color Temp” to select another color temperature to adjust.
B. Adjust Normal temperature:
1. Set the pattern generator to pattern 104 or 0 IRE pattern. Adjust the Item “ZR-Bright” value and can adjust to min
luminance
2. Switch the Ca210 to T△uvLv-mode (with press “MODE” button)
3. Switch the Ca210 channel to Channel 05 (with up or down “MEMORY CH” button)
4. The LCD-indicator on Ca210 will show T=9300K.
5. Adjust the Color Temp item: Normal, until Ca210 indicator reached the value T=9300k.
C. Adjust Warm color-temperature:
1. Set the pattern generator to pattern 104 or 0 IRE pattern. Adjust the Item “ZR-Bright” value and can adjust to min
luminance
2. Switch the Ca210 to T△uvLv-mode (with press “MODE” button)
3. Switch the Ca210 channel to Channel 05 (with up or down “MEMORY CH” button)
4. The LCD-indicator on Ca210 will show T=6500K.
5. Adjust the Color Temp item: Warm, until Ca210 indicator reached the value T=6500k.
Press “Exit” button on remote control to quit from factory mode.
NOTE 1:
If you choose to do EEPROM Initialization (EEPROM Init), you MUST write down all White Balance values before
doing so. These values will be reset to a default value.
All white balance factory adjustments will be LOST. It can be done as a NOTE anywhere in same page, please.
NOTE 2:
Activating Reset to Default Settings (Reset to Def) will zero BOTH hour counters, the one for back light time and the
one for Total time.
You may want to add a condition or event in which this would be recommended.

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Troubleshooting
1). No Picture, No Sound
First, confirm the status of Stand-by / On lamp (LED), then survey by following the flowchart as shown below.
Status of Stand-by / On lamp (LED) Estimated cause, method of survey
Not lighting Confirm the connection of AC cord is complete, and AC
switch is turned on, then forward to (1).
Lighting in red Power save mode of Video or PC input. It is not defect.
Lighting in red Turn power on by remote controller.
If it does not turn power on, forward to (2).
Lighting in blue Forward to (2).
(1) Stand-by / On lamp (LED)
is not lighting
The voltage of
pin No.11,No.12 of
CN701 on
Main Board is 5V?
Power Board
No
Yes
Main Board