Hitachi UltraVision L42S503 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.
1. Summary
New High Gloss Black Frame; (4) HDMI™ (V.1.3 with x.v.Color™, Deep Color, CEC) - 1080p60, 1080p24 Input
Compatible; New Multi-Function Remote Control; 120Hz 1080p Perfected; Reel 120 Motion Correction;
Dynamic/Standard/Movie/Custom/Game Picture Memories; 3 Preset Color Temperatures; Game Mode
LCD TV 2009-4
L42S503
HITACHI
Block Diagram......……………..………….………......21
Schematic Diagram…...………………………………22
Connection Diagram...……….………….……..……..40
Wiring Diagram....………..………………....…….......41
PCB Layout...……………………………....……….....42
Exploded View...…………………..……….................50
Parts List...……………..............................................51
Summary………..........……..........................……….........1
Features….….………..........................................……......4
Dimensions……..……………………………………………5
General Specification................................…………........6
Service points…………….…………….……………..........7
Adjustment……………..………..…….………..….…….....8
Troubleshooting.………...……………………….…….......11
Self Diagnosis Function..…..…………………...……….....20
Table of Contents
HITACHI
- NOTICE-
All warranty parts are provided through
Hitachi Customer Service.
All Servicers should call:
800-654-7013
Revised: 041210 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.

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2. Features
●Enhanced definition LCD display panel
V420H1-LH5 is a 42” TFT Liquid Crystal Display module with 12-CCFL Backlight unit and 2ch-LVDS interface. This
module supports 1920 x 1080 Full HDTV format and can display 1.07G colors (8-bit+FRC/color). The inverter
module for backlight is built-in.
●New High Gloss Black Frame
●(4) HDMI™ (V.1.3 with x.v.Color™, Deep Color, CEC) - 1080p60, 1080p24 Input Compatible
●New Multi-Function Remote Control
●120Hz 1080p Perfected
●Reel 120 Motion Correction
●Dynamic/Standard/Movie/Custom/Game Picture Memories
●3 Preset Color Temperatures
●Game Mode

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3. Dimensions

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4. General Specification
Inputs
Power Input: AC 120V, 60Hz
Power Consumption
Maximum Power: 250 W, 2.5 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 20k Ohm
Average Input Level: 470mVrms
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
Audio
MTS Stereo/SAP
4 Sound Modes (Custom, Standard, Movie, News)
SRSTruSurround HD Sound
L42S503: 24W
Inputs/Outputs
Wideband Component Y, Pb, Pr
Composite Video
S-Video
Antenna (RF)Inputs
Audio Output
Optical Output
HDMI
Upgrade USB Slot
RGB Input
RGB Audio Input
Phone Jack for Headphones

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5. Service points
Lead-free solder
This product uses lead-free solder (unleaded) to help protect the environment. Please read these instructions
before attempting any soldering work.
1) Lead-free solder indicator
Printed circuit boards using lead-free solder are engraved with an label.
2) Properties of lead-free solder
The melting point of lead-free solder is 40-50℃higher than leaded solder.
3) Servicing solder
Solder with an alloy composition of Sn-3.0Ag-0.5Cu or Sn-0.7Cu is recommended. Although servicing with
leaded solder is possible, there are a few precautions that have to be taken. (Not taking these precautions
may cause the solder to not harden properly, and lead to consequent malfunctions.)
Precautions when using leaded solder
●Remove all lead-free solder from soldered joints when replacing components.
●If leaded solder should be added to existing lead free joints, mix in the leaded solder thoroughly after the
lead-free solder has been completely melted (do not apply the soldering iron without solder).
4) Servicing soldering iron
A soldering iron with a temperature setting capability (temperature control function) is recommended.
The melting point of lead-free solder is higher than leaded solder. Use a soldering iron that maintains a high
stable temperature (large heat capacity), and that allows temperature adjustment according to the part being
serviced, to avoid poor servicing performance.
Recommended soldering iron:
●Soldering iron with temperature control function (temperature range: 320-450℃)

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6. Adjustment
6.1 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. The factory menu
follow picture:
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”.
6.2 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
x 272 285 313
y 278 293 329
HDMI Mode
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
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

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Note: We can only the HDMI white balance to cover the white balance of all source modes, this method is
meeting to the Zoran 775 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. The factory menu
follow picture:
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.
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

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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.

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7. 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

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Main Board
No
Power Board
LCD Panel.
The voltage of
pin No.3,No.4 of CN701
on Main Board is 12V?
The voltage of
pin No.11 or 12 of CN701
in Main Board is 5V?
Yes
No Main Board
LCD Panel.
Yes The voltage of
pin No.1 to 4 of CN405
in Main Board is 12V?
No Yes
Main Board
Yes
(2) Stand-by / On lamp (LED)
is lighting in red or blue
LED Indicates
blue or red?
red
green
Turn R/C power on, then
LED change to blue?
No
Backlight of LCD Panel
is lighting?
Yes
No

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2). No Picture, Picture failed (Color failed, Dark picture, Beat noise, etc.)
First, confirm the connection of all connectors between Board's, then survey by following the flowchart as shown
below.
CN701 (1) 3.3V
(2) 0~3.3V
(3)~(4) 12V
(5)~(7) 0V
(8)~(9) 24V
(10)~(12) 5V
No Picture, Picture failed
(Color failed, Dark picture,
Beat noise, etc.)
Occured at only
Video1 input (CVBS), or
Video2 input (CVBS, S2)?
Main Board
No
Yes
Main Board
Voltage of all pin of
CN701 on Main Board is
correct?
Power Board
No
Yes

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3). No Sound, Sound failed (Loading interrupt, Noise, etc.)
First, confirm the connection of all connectors between Board's and speakers, then survey by following the flowchart
as shown below.
No Sound, Sound failed
(Loading interruption,
Noise, etc)
Occured at only
Video1 input (CVBS), or
Video2 input (CVBS, S2)? Main Board
No
Yes
Main Board or Speaker units
Voltage of
pin No.3 or 4 of CN701 on
Main Board is 12V?
Power Board
No
Yes

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Confirm CN405 of Main Board
is well connected
No
Picture
displayed?
A
Change connector between
Main Board and LCD unit
Yes End
No
Picture
displayed?
Picture
displayed? Yes Main Board
No
LCD unit
Change Main Board
Yes connector between
Main Board and LCD unit

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4). Network terminal (LAN) communication failure
Replace the connected communication
equipment to one with DHCP function, or set
fixed IP address.
Examine the Main Board.
Yes
Connected commu-
nication equipment is set to
Auto negotiation mode?
Yes
No
Set connected communication equipment to
Auto negotiation mode, or set to same mode of
TV settings.
Cannot execute the communication with
network terminal (LAN),
or unstable.
Connection is
following the instruction of
user manual?
Connect modem or router by
following the instruction
of user manual.
Yes
No
Confirm LAN cable.
The cable is
UTP straight type, and
category 5?
Replace to the cable which is UTP straight type,
and category 5.
Yes
The cable is deteriorated?
DHCP function is
enbedded in connected commu-
nication equipment?
No
No
Yes
No
Replace cable.

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Confirm CN405 of Main Board
is well connected
No
Picture
displayed?
A
Change connector between
Main Board and LCD unit
Yes End
No
Picture
displayed?
Picture
displayed? Yes Main Board
No
LCD unit
Change Main Board
Yes connector between
Main Board and LCD unit

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5). Telephone line, when Execution the "Simplified connection test", "Cannot
connect" is indicated.
"Cannot connect" is indicated.
Telephone line is
correctly connected? Connect telephone line correctly.
Yes
No
The type of telephone
line is set correctly?
Examine the Main Board.
Yes
No Set the type of telephone line correctly.

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Confirm CN405 of Main Board
is well connected
No
Picture
displayed?
A
Change connector between
Main Board and LCD unit
Yes End
No
Picture
displayed?
Picture
displayed? Yes Main Board
No
LCD unit
Change Main Board
Yes connector between
Main Board and LCD unit

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8. Self Diagnosis Function
Return to Main Parts View