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SERVICE MANUAL

Be sure to read this manual before servicing. To assure safety from fi re, electric shock, injury, harmful radiation
and materials, various measures are provided in this HITACHI LCD monitor.
Be sure to read cautionary items described in the manual to maintain safety before servicing.
1. Since Panel Module is made of glass, handling the broken Module shall be taken care suffi ciently in order
not to be injured.
2. Replacing work shall be started after the Panel Module and the AC/DC Power supply become suffi ciently
cool.
3. Special care shall be taken to the display area in order not to damage its surface.
4. The Panel Module shall not be touched with bare hand to protect its surface from stains.
5. It is recommended to use clean soft gloves during the replacing work in order to protect not only the dis-
play area of the Panel Module but also a serviceman himself.
1. Features --------------------------------------------------3
2. Specifi cations --------------------------------------------4
3. Component names -------------------------------------5
4. Adjustment -----------------------------------------------6
5. Troubleshooting --------------------------------------- 19
6. Self diagnosis function ------------------------------ 22
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
Downloaded From TV-Manual.com Manuals
Caution
Service Warning
Contents
LCD Television
March 2004 Digital Media Division
7. Replacement parts list ------------------------------- 23
8. Block diagram ----------------------------------------- 24
9. Connection diagram --------------------------------- 26
10. Wiring diagram ---------------------------------------- 27
11. Disassembly diagram -------------------------------- 28
SM008
28LD5200E
(PW1L)

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   Summary of Contents for Hitachi 28LD5200E

  • Page 1: Table Of Contents

    Be sure to read this manual before servicing. To assure safety from fi re, electric shock, injury, harmful radiation and materials, various measures are provided in this HITACHI LCD monitor. Be sure to read cautionary items described in the manual to maintain safety before servicing.

  • Page 2

    28LD5000TA (PW1L) CAUTION FOR SAFETY Please read this page before repairing the monitor. This page explains the following items to ensure the safety of set and prevent accidents during repair work. We explain by symbols what damage or injury may occur if errors are made. Warning This symbol means "possible to cause death or serious injury"...

  • Page 3: Features

    28LD5200E (PW1L) PRECAUTIONS ● How to clean the LCD screen panel of the monitor Before cleaning the monitor, turn off the monitor and disconnect the power plug from the power outlet. To prevent scratching or damaging the LCD screen face, do not knock or rub the surface with sharp or hard objects.

  • Page 4: Specifications

    28LD5200E (PW1L) 2. Specifications Display Approx. 28 inches (599.04 (H) x 359.42 (V) mm) dimensions Panel Resolution 1280 (H) x 768 (V) pixels 854 (W) x 516 (H) x 277 (D) mm Net dimensions 21.9kg Net weight Temperature Operating : 5 C to 35 C, Storage : 0 C to 60 C...

  • Page 5: Component Names

    28LD5200E (PW1L) 3. Component names [ Main unit ] Control panel These buttons are located on the top. INPUT SELECT button (OK button) PROGRAM UP button SELECT button) SUB-POWER button PROGRAM DOWN button ( SELECT button) VOLUME UP/DOWN buttons MENU button ADJUST buttons) ( ) indicates the function while the MENU is displayed on the screen.

  • Page 6: Adjustment

    28LD5200E (PW1L) 4.Adjustment ● How to get to Adjustment mode Using the front control buttons with the set turned off (standby) can activate it. Press the SUB-POWER( ) button, INPUT SELECT( ) button and button at the same time, and hold for more than 5 seconds.

  • Page 7

    28LD5200E (PW1L) Service adjustment items by I C-bus control O : Should be adjusted : Should be followed previous data Function Changed Component ADJ. Maximum Formatter VIDEO TUNER Adjustment Items Mode Default Value PANEL 0 R DRIVE1 [TV/VIDEO/DSUB-COMP] COOL 1 G DRIVE1 [TV/VIDEO/DSUB-COMP]...

  • Page 8: For Wvga

    28LD5200E (PW1L) O : Should be adjusted : Should be followed previous data Function Changed Component ADJ. Maximum Formatter VIDEO TUNER Adjustment Items Mode Default Value PANEL 94 S_GP 95 S_V_ID 96 BELL/HPF 97 Cb offset1 MAIN 98 Cr offset1...

  • Page 9

    28LD5200E (PW1L) O : Should be adjusted : Should be followed previous data Function Changed Component ADJ. Maximum Formatter VIDEO TUNER Adjustment Items Mode Default Value PANEL 188 Upper Limits Value for Sync Detect of 2ms interval For AFC at TV mode...

  • Page 10

    28LD5200E (PW1L) O : Should be adjusted : Should be followed previous data Function Changed Component ADJ. Maximum Formatter VIDEO TUNER Adjustment Items Mode Default Value PANEL 282 Display of internal temperature C°(Temperature) 283 Display of Panel map version 284 accumulation time for Panel (hours)

  • Page 11

    28LD5200E (PW1L) O : Should be adjusted : Should be followed previous data Function Changed Component ADJ. Maximum Formatter VIDEO TUNER Adjustment Items Mode Default Value PANEL 376 CM_THRESHOLD (D15-D8) 377 CM_THRESHOLD (D7 -D0) 378 Sharpness Gain(RF M) MAIN 379 Sharpness Gain(RF M)

  • Page 12

    28LD5200E (PW1L) O : Should be adjusted : Should be followed previous data Function Changed Component ADJ. Maximum Formatter VIDEO TUNER Adjustment Items Mode Default Value PANEL 470 [MYNRP8] HD1/HD4/HD5/HD6/HD7/HD8 471 YFRNR Transition Level (Main/Sub) [MCNRP0] NT1/PAL1/multi 472 [MCNRP5] NT1/PAL1-video...

  • Page 13

    28LD5200E (PW1L) O : Should be adjusted : Should be followed previous data Function Changed Component ADJ. Maximum Formatter VIDEO TUNER Adjustment Items Mode Default Value PANEL 564 DSB Gain of Vertical for B-Y/B,R-Y/R [CVDSBG0] NTSC/PAL/multi 565 [CVDSBG1] 566 DSB coring of Vertical for B-Y/B,R-Y/R [CVDSBC0]...

  • Page 14: Q Mode 0:freeze, 1:move 1, 2:move

    28LD5200E (PW1L) O : Should be adjusted : Should be followed previous data Function Changed Component ADJ. Maximum Formatter VIDEO TUNER Adjustment Items Mode Default Value PANEL 658 Tint Center (CM) DVI-STB (720p-60/1080i-60/1080i-50 659 Tint Center (CM) DVI-STB (VGA) 660 Tint Center (CM)

  • Page 15: Factory Reset

    28LD5200E (PW1L) The Expression of input signal mode (format) Video Judgment of Video Input PAL1: RF, S and Composite of PAL/SECAM System Mode Input H.Frequency Setup PAL2: Component of PAL (YCBCR) 15.75kHz Auto PAL2 PAL3: Component of PAL (YPBPR) (576i)

  • Page 16

    28LD5200E (PW1L) Item AUTOMATIC SIGNAL LEVEL ADJ USTMENT –RGB (1) Preparation Procedure (1) Input the adjustment signal of VGA (60Hz) (1) Select RGB2 and enter the service adjustment format into RGB2 [D-sub] input terminal. mode. the adjustment signal (2) Select No.740 “RGB Amp. Gain ADJ.” and press...

  • Page 17

    28LD5200E (PW1L) Item COLOR TEMPERATURE ADJUSTMENT -VIDEO Preparation Procedure [Adjustment of Cool mode] (1) Set CRT COLOR ANALYZER(CA-210) at the Enter the service adjustment mode, and confirm that Adjustment NO 0,1 are set as 230. NO2 is set as 255.

  • Page 18

    28LD5200E (PW1L) Item COLOR TEMPERATURE ADJUSTMENT -PC Preparation Procedure It is same as color temperature adjustment data of video. Write the data which are inside drive No0 to No11 into drive N0.12 to No.23 respectively. Example. [at VIDEO] [at PC] No.0 'data'...

  • Page 19: Troubleshooting

    28LD5200E (PW1L) 5. Troubleshooting How to get to Burn-in mode This mode displays the test patterns of some single color raster in turn. These signals are from built-in generator of LCD monitor. Using the front control buttons with the set turned off (standby) can activate this mode.

  • Page 20

    28LD5200E (PW1L) Power cannot be turned on (LED does not light) Is the input voltage applied to Power supply unit? (CN5 [1][3]) Power Power supply Power board switch inlet unit Are the voltages applied to P804 [1][8]pins, P806[1]pin and P808 [1][4][8][12]pins...

  • Page 21

    28LD5200E (PW1L) Picture is not displayed (LED is lighting) Is the LED red or green/orange? green/orange Is Voltage applied to P804[1]pin of the Power supply unit? Is it the power saving mode? [1] +5V Power supply unit Input signal Cable...

  • Page 22: Self Diagnosis Function

    28LD5200E (PW1L) 6. Self-Diagnosis Function Signal circuit check mode: It indicates the check result on some points of the signal circuit and the history of them with On-Screen Display (OSD). Signal circuit self-diagnosis function This function is for the failure of the signal circuit, for example the phenomenon as below: "Sometimes power turns off abnormally."...

  • Page 23: Replacement Parts List

    THE UPDATED PARTS LIST FOR THIS MODEL IS AVAILABLE ON ESTA Downloaded From TV-Manual.com Manuals...

  • Page 24: Block Diagram

    28LD5200E (PW1L) 8. Block diagram Block diagram 1/2 INVERTER Back light LCD Panel Module Inverter Power AC100V -240V Power Unit Noise (Main Power Circuit) Filter Main Power SW TACT SW PWB Signal Power Audio Power Supply Remote Control Speaker x2...

  • Page 25

    28LD5200E (PW1L) Block diagram 2/2 Downloaded From TV-Manual.com Manuals...

  • Page 26: Connection Diagram

    28LD5200E (PW1L) 9. Connection diagram Downloaded From TV-Manual.com Manuals...

  • Page 27: Wiring Diagram

    28LD5200E (PW1L) 10. Wiring diagram ECONT P802 AUDIO board INVERTER UNIT EJP1 EJP2 P803 EJF1 P804 EAF1 EJF3A JOINT board EAS1 POWER board EJF2 To Panel EJA1 TO SP (Right) EAJ1 EJF5 EAS2 EJF4 EJF6 SUB POWER board CN6-1 CN4-1...

  • Page 28: Disassembly Diagram

    28LD5200E (PW1L) 11. Disassembly diagram The codes in brackets shown in the wiring diagram express the name of materials. The key to the codes and materials is shown on the table below. Code Material ACRYLONITRILE BUTADIENE STYRENE POLYCARBONATE Downloaded From TV-Manual.com Manuals...

  • Page 29

    Fax: +46 (0) 8 562 711 13 Tel: +39 02 38073415 Servizio Clienti Email: csgswe@hitachi-eu.com Fax: +39 02 48786381/2 Email: customerservice.italy@hitachi-eu.com HITACHI EUROPE LTD (Norway) AB HITACHI EUROPE S.A.S Lyon Office STRANDVEIEN 18 B.P. 45, 69671 BRON CEDEX 1366 Lysaker...

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