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User Manual
SERVICE MANUAL
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. Replacement work should be started after the Panel Module and the AC/DC Power supply have become
suffi ciently 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.
1. Features --------------------------------------------------3
2. Specifi cations --------------------------------------------4
3. Component names -------------------------------------5
4. Service point ---------------------------------------------7
5. Adjustment -----------------------------------------------8
6. Troubleshooting --------------------------------------- 16
7. Self-diagnosis function ------------------------------ 21
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
Caution
Service Warning
Contents
8. Block diagram ----------------------------------------- 23
9. Wiring diagram ---------------------------------------- 25
10. Circuit diagram ---------------------------------------- 26
11. Printed wiring board diagram ---------------------- 42
12. Disassembly diagram -------------------------------- 46
13. Replacement parts list ------------------------------- 48
LCD Television
July 2005 Digital Media Division
No.019E
YK
26LD8000TA
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Summary of Contents for Hitachi 26LD8000TA
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Page 1: Table Of Contents
No.019E 26LD8000TA SERVICE MANUAL 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. Be sure to read cautionary items described in the manual before servicing. - Page 2 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. This means "Potential to sustain injury or even death." Warning This means "Potential to sustain breakage or irreparable damage."...
- Page 3 WARNING Follow instructions. Must use same types of wires and components. The cabinet, chassis, and labels are parts The TV uses special tubes and tapes that require attention. You must follow the made from insulated materials. Moreover, caution notes and safety instructions some materials are kept from making presented throughout this User Manual to contact with the PWB for the sake of...
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Page 4: Features
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. -
Page 5: Specifi Cations
2. Specifications Display Approx. 26.005nches (604 (H) x 323 (V) mm, diagonal 600.53mm) dimensions Panel Resolution 1366 (H) x 768 (V) pixels Net dimensions 661.9 (W) x 522.5 (H) x 266.9(D) mm (With Base) Net weight 18 kg (With Base) Temperatur Operating: 0°C to 40°C, Storage: -15°C to 50°C Ambient... -
Page 6: Component Names
3..Component names [Main unit] Control panel An Adjustment buttons are located on the top of the control panel Indications for each button's function can be found on the inside of the control panel cover. 1. SUB-POWER 4. VOL 7.MENU 2. PROGRAM 4. - Page 7 [Remote Control]...
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Page 8: Service Point
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. Lead-free solder can splatter at high temperatures (600℃). Lead-free solder indicator Printed circuit boards using lead-free solder are engraved with an label. -
Page 9: Adjustment
5.Adjustment 5.1 SERVICE (FACTORY) MODE ACCESS This model has a Factory Mode, where the technician can access and adjust some of the color temperature settings. The Factory Mode has several different appearances, depending on the input signal. Picture Setting NTSC for Factory Model Table1 Table2... - Page 10 ENTER FACTORY MODE NAVIGATION To navigate through the different menu items, use the button on the remote control. The menu items will be high-lighted green as navigation occurs. To access a particular adjustment parameter, use the “ENTER” button on the remote control, which will cause a new menu to appear. To back up from the FACTORY MODE, use the RETURN or EXIT button on the remote control.
- Page 11 Menu Function Description Video Picture Mode OSD menu video mode default setting Picture Display Contrast adjustment ( Back- end ) Brightness Display Brightness adjustment ( Back- end ) Tint Display Hue adjustment ( Back- end ) Color Display Saturation adjustment ( Back- end ) Detail Display Sharpness adjustment ( Back- end ) Backlight...
- Page 12 Scalar Bri - B Output B brightness factor adustment ( color temperature function ) Scalar Off - R Output R offset factor adustment ( color temperature function ) Scalar Off - G Output G offset factor adustment ( color temperature function ) Scalar Off - B Output B offset factor adustment ( color temperature function ) Display...
- Page 13 Enable Blue Gain Blue add gain COLOR TEMPERATURE ADJUSTMENTS Following the procedures to make the color temperature adjustments. Note that a colorimetry meter (such as a Minolta CA-210) is required to measure the actual screen color temperature. Low : x=0.301 +/- 0.01, y=0.314 +/- 0.01 = Color Temp.: 7500K High : x=0.266 +/- 0.01, y=0.264 +/- 0.01 = Color Temp.: 15000K 5.2 Firmware update This model has a Debbug Mode, where the technician can debbug and update the firmware.
- Page 14 6. Load BIN file. 7. Click OK button...
- Page 15 8. Click Write Device icon 9. IAP is finished while following massage is shown. 10. After IAP is done, please disconnect and reconnect AC power switch and do initialization.
- Page 16 5.3 Initialization This model has a Initialization Mode, where the technician can initial the EEPROM. Preliminary 1.To access the Bebbug Mode, the TV must be running. ① ② Procedure 6. Press and hold the #4 and #5 button (VOLUME and VOLUME 7.
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Page 17: Troubleshooting
6.Troubleshooting The flow chart shown below will help you to troubleshoot your TV 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 TV is turned on. -
Page 22: Self-Diagnosis Function
7.Self Diagnosis Function If a problem arises while you are using the TV, please read this self diagram function guide carefully before you ask to have the TV repaired. You may be able to fix it easily by yourself. For example, if the mains plug is disconnected from the mains outlet, or the TV aerial has problems, you may think there is a problem with the TV itself. - Page 23 Other concerns: When the SLEEP TIMER function operates, the TV is auto matically turned off. If the TV suddenly turns off, try to press the standby button to turn on the TV once again. If the TV goes back to normal, there is no problem. It takes a short period of time from the time an operation such as changing channels is performed until an image is displayed.
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Page 24: Block Diagram
8.Block Diagram LCD-TV... -
Page 26: Wiring Diagram
9. Wiring Block Diagram... -
Page 27: Circuit Diagram
10. Circuit Diagram Main Board (PWB-0885) - Page 40 I/O Board1 (PWB-0886)
- Page 41 I/O Board2 (PWB-0887)
- Page 42 Power Board...
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Page 43: Printed Wiring Board Diagram
11. Printed Wiring Board Diagram Main Board-Top side(PWB-0885) - Page 44 I/O Board1-Top Side(PWB-0886) I/O Board2-Top Side (PWB-0887)
- Page 45 Power Board...
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Page 47: Disassembly Diagram
12. Disassembly Diagram Mechanical... -
Page 49: Replacement Parts List
Mechanical & Packing Parts List(26LD8000TA) NO. DESCRIPTION PART NO. HITACHI PART NO Q’TY. M1 FRONT COVER ASSEMBLY 5095670823 a FRONT COVER(ASIA) E641104703 b LENS LED E640333200 c IR LENS E640333300 d SPONGE-H E642026412 e SPONGE-V E642026413 f IPS LABEL E642442200... - Page 50 MODEL LABEL(TTL)(A05) E030538202 f MODEL LABEL (TCN) (A05) E030538204 M6 CONTROL BUTTON ASSEMBLY 5095670825 a CONTROL PANEL UP(ASIA) E642323202 b CONTROL BUTTON E642852301 M7 STAND ASSEMBLY 5095854669 a STAND TURN COVER(ASIA) E641418202 b STAND COVER(ASIA) E641418302 c STAND BASE E641418400 d STAND RING E641419600 e STAND BRACKET...
- Page 51 b TAPE OF AL FOIL E648006507 c TAPE OF AL FOIL E648006520 M12 RS CARTON I513580256 EPS Bottom(BR) I523580256 EPS Bottom(BL) EPE Bag I533319256 EPS Top(TR) I523580156 EPS Top(TL) Clip PE Bag I533251157...
- Page 52 Electrical Parts List (26LD8000TA) DESCRIPTION PART NO. HITACHI PART NO QT'Y PB01 POWER MODULE + CASE FSP 6693006617 5098801042 ASSEMBLY PCB-MAIN BOARD (PWB-0885-A) ASSEMBLY PCB-SIDE I/O (PWB-0886) 5097650503 5097650602 ASSEMBLY PCB-REAR I/O (PWB-0887) 5098801043 ASSEMBLY PCB-LED/IR(PWB-0885-B) 5098801046 ASSEMBLY PCB-KEY PAD (PWB-0885-C)
- Page 53 MEMO...
- Page 54 26LD8000TA YK No.019E Digital Media Division TP01511...