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SERVICE MANUAL
L37X01A : The LCD panel made from IPS-Alpha is used for this product.
L42X01A : The LCD panel made from LPL is used for this product.
Be sure to read this manual before servicing. To ensure safety from fi re, 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 qualifi ed 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 qualifi ed to do so.
1. Since the Panel Module and the front Filter are made of glass, handling the broken Module and Filter
carefully and with caution in order not to receive injury.
2. Replacement work should be started after the Panel Module and the AC/DC Power supply have
become suffi ciently cool.
3. Special care should be taken when working near the display area in order not to damage its surface.
4. The Panel Module should not be touched with bare hands in order to protect its surface from
blemishes and damage.
5. 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.
1.Features ······················································· 3
2.Specifi cations ··············································· 4
3.Component names ······································· 7
4.Service points ·············································· 10
5.Adjustment ·················································· 11
6.Troubleshooting ·········································· 17
7.Hotel Menu Operation ································· 20
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
YK
Caution
Service Warning
Contents
8.Block Diagram ··········································· 23
9.Connection Diagram ································· 26
10.Wiring Diagram ·········································· 27
11.Printed Wiring Board Diagram ··················· 29
12.Disassembly Diagram ······························· 38
13.Replacement Parts List ····························· 45
LCD TV
September 2007
No.055E
L37X01A
L42X01A
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Related Manuals for Hitachi L37X01A
Summary of Contents for Hitachi L37X01A
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Page 1: Table Of Contents
L37X01A SERVICE MANUAL L42X01A L37X01A : The LCD panel made from IPS-Alpha is used for this product. L42X01A : The LCD panel made from LPL is used for this product. Caution Be sure to read this manual before servicing. To ensure safety from fi re, electric shock, injury, harmful radiation and materials, various measures are provided in this LCD TV. - Page 2 L37X01A / L42X01A 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."...
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Page 3: Features
L37X01A / L42X01A PRECAUTIONS Cleaning the LCD panel of the television Please make sure to unplug the power cord before cleaning the television. ● Wipe the panel with a lint-free and dry cloth in order to prevent damage to the panel surface. -
Page 4: Specifications
The television takes at least 30 minutes to attain the status of optimal picture quality. S-Video input terminal is available for AV3 of L37X01A only. This analog audio input terminal can be used for PC (RGB) or HDMI 1~3 only. - Page 5 L37X01A / L42X01A ● The Expression of input signal mode (format) With HDMI INPUT [Table] Digital HDMI 1 Video Timing Chart Signal mode Horizontal Dot clock Remarks frequency frequency Vertical Signal (KHz) (MHz) Resolution frequency name (Hz) 640x480 59.94 31.47 25.18...
- Page 6 L37X01A / L42X01A With Component Video INPUT [Table] Component Video Timing Chart Signal mode Horizontal Dot clock frequency frequency Remarks Vertical Signal (KHz) (MHz) Resolution frequency name (Hz) 576i 720(1440)x576 15.63 EIA-861D 480i 720(1440)x480 59.94 15.73 EIA-861D 576P 720x576 31.25...
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Page 7: Component Names
L37X01A / L42X01A 3. Component names [Main unit] Front Panel ① Cabinet L42X01A ② Panel ③ Remote Control Receiver L37X01A ② ① ④ Indicating Lamp ⑤ Speaker ⑥ Desktop Stand (Option for L42X01A) ⑦ Main Power Switch (on the left side) –... - Page 8 L37X01A / L42X01A Control Panel L37X01A L42X01A ① Sub Power button ② Menu button ③ Channel Up/ button ④ Channel Down/ button ⑤ Volume Up button ⑥ Volume Down / button ⑦ Input Select /OK button...
- Page 9 L37X01A / L42X01A Remote Control Sub Power Press this button to switch TV On or Off standby. Device Select (TV/DVD/STB) Press these buttons to select the device (TV, DVD or STB) to be controlled by this remote control. The selected button will light up to display the selected mode.Normally, select “TV”.
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Page 10: Service Points
L37X01A / L42X01A 4. 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. Caution: Always wear safety glasses to prevent fumes or molten solder from getting into the eyes. -
Page 11: Adjustment
L37X01A / L42X01A 5.Adjustment 5.1 Color Temperature Adjustment Procedure 1. Preparation 1. Set the signal generator (ASTRO VG859A or equivalent) to RGB, 1024*768, 60HZ, Level:0.7V, all white pattern.. 2. Turn on the set and select RGB source,perform pre-heat run more than 30 min. with Full white pattern. - Page 12 L37X01A / L42X01A 3. Source Calibration (RGB) 1. Set the signal generator to RGB, Color bar pattern (level: 0.7V, color order from left side: white, yellow, cyan, green,magenta, red, bule, black, width ratio: 12.5% for each color), 2. Entering into factory Mode: Press up or down key of remote control to select “Source Calibration”, Press 「OK」...
- Page 13 L37X01A / L42X01A (3) Select 「Cool 15000」 (1) Cool：15000 K spec.: x=0.266±0.001 y=0.270±0.001 (2) If the x and y value are larger than specification, Decrease Green drive from default value. Increase Blue drive from default value. (3) If the x or y or both x and y value is/are smaller than specification.
- Page 14 L37X01A / L42X01A 5. Color Temperature Check: Press 「Menu」key , Press 「ok」 to select [Picture] [Color Temp.] [OK]. Picture Picture Mode Dynmaic Contrast Brightness Color Sharpness Tint Color Temperature Cool Back Light High Reset Reset Select Return (1) Select 「Cool」,check If the color temperature is in spec.
- Page 15 L37X01A / L42X01A (3) Select [Warm],check If the color temperature is in spec. Color Temperature Warm Next/Prev Adjust Return ◄► Warm：6500 K x=0.314±0.005 y=0.327±0.005 6. Source Calibration (Component only support AV1 port used) (1) Set the signal generator to Component, Color bar pattern (level: 0.7V, color order from left side: white, yellow, cyan, green, magenta, red, bule, black, width ratio: 12.5% for each color)
- Page 16 L37X01A / L42X01A 7. Source Calibration (CVBS only support AV3 port used) (1) Set the signal generator to CVBS, Color bar pattern (level: 0.7V, color order from left side: white, yellow, cyan, green, magenta, red, bule, black, width ratio: 12.5% for each color) (2) Entering into factory Mode:Press up or down key of remote control to select “AV CVBS Calibration”, Press 「OK」...
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Page 17: Troubleshooting
L37X01A / L42X01A 6. Troubleshooting The flow chart shown below will help you to troubleshoot your Televison set with it doesn’t display normally. Each procedure offers a simple way to check for system errors. Before starting, ensure that there is a signal in and that the Televison is turned on. - Page 18 L37X01A / L42X01A Change to new power board. P/N : PK101V0410I...
- Page 19 L37X01A / L42X01A Change to new power board. P/N : PK101V0410I...
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Page 20: Hotel Menu Operation
L37X01A / L42X01A 7. Hotel Menu Operation Opening Hotel Menu： 1. Press colorful button “YELLOW & BLUE” of the remote control and hold on, then press “MENU” at least 3 Service Mode seconds to enter “ ”. Hotel Menu 2. Using the to select “... - Page 21 L37X01A / L42X01A Selected Items Setup hint Channel Lock This is for locking out the channel selecting function Fine-Tuning Lock This is for locking out the TV fine tuning function Teletext Lock This is for locking out the Teletext function Select the waiting time to enter pc power saving 5,10,15,.20...
- Page 22 L37X01A / L42X01A Selected Items Setup hint Available For Power OFF Enable to execute special R/C of power off key function Command NOTES: 1. The default setting of all hotels menu items are off. 2. When the Hotel Mode item is ON, P+/P- button of the remote or keypad can cyclically select the TV channel and source: 1,2,……,125,AV1, AV2, AV3,AV4 HDMI1,HDMI2,HDMI3...
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Page 23: Block Diagram
L37X01A / L42X01A 8. Block Diagram... - Page 24 L37X01A / L42X01A POWER BOARD L42X01A...
- Page 25 L37X01A / L42X01A L37X01A...
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Page 26: Connection Diagram
L37X01A / L42X01A 9. Connection Diagram... -
Page 27: Wiring Diagram
L37X01A / L42X01A 10. Wiring Diagram L42X01A... - Page 28 L37X01A / L42X01A L37X01A...
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Page 29: Printed Wiring Board Diagram
L37X01A / L42X01A 11. Printed Wiring Board Diagram L42X01A TOP SIDE... - Page 30 L37X01A / L42X01A BOTTOM SIDE...
- Page 31 L37X01A / L42X01A L37X01A...
- Page 32 L37X01A / L42X01A BOTTOM...
- Page 33 L37X01A / L42X01A POWER MODULE [ L42X01A ]...
- Page 34 L37X01A / L42X01A POWER MODULE [ L37X01A ]...
- Page 35 L37X01A / L42X01A PCBA KEY/B L42X01A TOP SIDE BOTTOM SIDE L37X01A TOP SIDE BOTTOM SIDE...
- Page 36 L37X01A / L42X01A PCBA IO/B L42X01A TOP SIDE BOTTOM SIDE L37X01A TOP SIDE BOTTOM SIDE PCBA IR/B L42X01A / L37X01A TOP SIDE BOTTOM SIDE...
- Page 37 L37X01A / L42X01A PCBA SIDE HDMI L42X01A/ L37X01A TOP SIDE BOTTOM SIDE...
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Page 38: Disassembly Diagram
L37X01A / L42X01A 12. Disassembly Diagram L42X01A... - Page 39 L37X01A / L42X01A...
- Page 40 L37X01A / L42X01A L37X01A...
- Page 41 L37X01A / L42X01A L42X01A CO 23 : CO...
- Page 42 L37X01A / L42X01A L42X01A NA 24 : NA...
- Page 43 L37X01A / L42X01A L37X01A CO...
- Page 44 L37X01A / L42X01A L37X01A NA...
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Page 45: Replacement Parts List
L37X01A / L42X01A 13. Replacement Parts List L42X01A USAGE ITEM PART NO DESCRIPTION SPEC L42X01A CO L42X01A NA TE05401 PCBA IR/B VTV-IR42002 SHX42C TE05411 PCBA KEY/B VTV-K42002 SHX42CG TE05421 PCBA SWITCH/B VTV-SW42002 SHX42 TE05431 PCBA HDMI/B VTV-HDMI42002 SHX4 TE05441 PCBA SIDE-IO/B... - Page 46 L37X01A / L42X01A L37X01A USAGE ITEM PART NO DESCRIPTION SPEC L37X01A CO L37X01A NA TE05601 PCBA KEY/B VTV-K3704 SHH37CH PCBA IR/B VTV-IR42002 SHX42CGA TE05401 TE04911 PCBA SWITCH/B VTV-SW3209 SLH37CHA PCBA IO/B VTV-IO3704 SHH37CH TE05611 TE05431 PCBA HDMI/B VTV-HDMI42002 SHX42CGA FIRMWARE MAIN/B...
- Page 47 L37X01A / L42X01A MEMO...
- Page 48 L37X01A YK No.055E L42X01A TE05681...