Hitachi CML176SXW Service Manual
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Hitachi CML176SXW Service Manual

Hitachi CML176SXW Service Manual

Tft lcd monitor
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CAUTION:
Before servicing this chassis, it is important that the service technician read the "Safety
Precautions" and "Product Safety Notices" in this service manual.
ATTENTION:
Avant d'effectuer l'entretien du châassis, le technicien doit lire les «Précautions de sécurité»
et les «Notices de sécurité du produit» présentés dans le présent manuel.
VORSICHT:
Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise" und „Hinweise
zur Produktsicherheit" in diesem Wartungshandbuch zu lesen.
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
SERVICE MANUAL
MANUEL D'ENTRETIEN
WARTUNGSHANDBUCH
TFT LCD MONITOR
June 2005
No. 0536
CML176SXW
CML178SXWB
Data contained within this Service
manual is subject to alteration for
improvement.
Les données fournies dans le présent
manuel d'entretien peuvent faire l'objet
de modifications en vue de perfectionner
le produit.
Die in diesem Wartungshandbuch
enthaltenen Spezifikationen können sich
zwecks Verbesserungen ändern.
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  • Page 1 No. 0536 CML176SXW CML178SXWB SERVICE MANUAL MANUEL D'ENTRETIEN WARTUNGSHANDBUCH CAUTION: Before servicing this chassis, it is important that the service technician read the “Safety Precautions” and “Product Safety Notices” in this service manual. Data contained within this Service manual is subject to alteration for improvement.

  • Page 2: Table Of Contents

    EP877/878 TFT LCD MONITOR CONTENTS 1. INTRODUCTION.......................... 4 1.1 Scope ..................................4 1.2 Description ................................4 2. ELECTRICAL REQUIREMENTS ....................5 2.1 Standard Test Conditions............................5 2.2 LCD monitor General specification ........................6 2.3 LCD Panel Specification ............................7 2.4 Input Signals............................... 12 Supported Timing................................
  • Page 3 8.9 Climatic Conditions: ............................38 8.10 Test Procedure: ..............................38 9. POWER LINE SURGE TEST (IEC 61000-4-5 SURGE) ............40 9.1 Climatic Condition ............................. 40 9.2 Test Conditions:..............................40 ..................................40 ..................................40 ..................................40 ..................................40 9.7 Display set high-resolution mode, AC input use AC 240V................. 40 10.ENVIRONMENT REQUIREMENT....................

  • Page 4: Introduction

    CRT monitor, it consumes less power and gets less weight in addition MTBF target is 20K hours or more. Comparison Chart of EP877/EP878 CML176SXW CML178SXW B Normal 17” panel Normal 17” panel...

  • Page 5: Electrical Requirements

    2. ELECTRICAL REQUIREMENTS 2.1 Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. : 225 lux Ambient light Viewing distance : 50cm in front of LCD panel Warrn up time All specifications : 30 minutes Fully functional : 5 seconds Chroma 2250 signal generator or equivalent, directly Measuring Equipment :...

  • Page 6: Lcd Monitor General Specification

    2.2 LCD monitor General specification 17 “ active matrix color TFT LCD Panel Type : HT17E13-100-110 337.92mm (H) x 270.336mm (V) Display size : 720 X 400 (70Hz) Display mode : 640 X 480 (60/66/70/72/75Hz) SVGA 800 X 600 (60/70/72/75Hz) XGA 1024 X 768 (60/70/75Hz) SXGA 1280 X 1024 (60/75Hz) standard resolution 0.264mm(H) x 0.264mm(V)

  • Page 7: Lcd Panel Specification

    2.3 LCD Panel Specification 2.3.1 LCD Panel Model ( HydisHT17E13-100-110 ) • Display Type active matrix color TFT LCD • Resolution 1280 x 1024 pixels • Display Dot 1280 x (RGB) x 1024 • Display Area 337.92mm(H) x 270.34mm(V) • Pixel Pitch 0.264mm(H) x 0.264mm(V) •...
  • Page 8 Note 1) Definition of Viewing Angle: Viewing angle range (10≤CR) Note 2) Definition of Contrast Ratio (CR): Ratio of gray max (Gmax), gray min (Gmin) at the center point of panel. Luminance with all pixels white (Gmax)  Luminance with all pixels black (Gmin) Note 3) Definition of Response time: Sum of T...
  • Page 9 Note 4) After stabilizing and leaving the panel alone at a given temperature for 30 min, the measurement should be executed. Measurement should be executed in a stable, windless and dark room. 30 min after lighting the back-light. This should be measured in the center of screen.
  • Page 10 Notes 5) Definition of Luminance of White : measure the luminance of white at center point. Notes 6)Definition of 9 points brightness uniformity (Measuring points: Refer to the Note 5) Bmin =100∗  Bmax Bmax: Maximum brightness Bmin: Minimum brightness Notes 7) Definition of Flicker level Flicker Voltage = ...
  • Page 11 Note 8) Definition of Crosstalk (Refer to the VESA STD) The calculation for shadowing is made from the 2 luminance measurements Gbkg and Lsh, as follows: Lmax - Lmin =  x100 % Lmin Where Lmax is the larger value of Gbkg or Lsh , and Lmin is the smaller of the two. ♦...

  • Page 12: Input Signals

    2.4 Input Signals 2.4.1 Video input • Type Digital / Analog R, G, B. • Input Impedance 75 ohm +/- 2% • Polarity Positive • Amplitude 0 - 0.7 +/- 0.05 Vp • Display Color same as LCD panel 2.4.2 Sync input •...

  • Page 13: Supported Timing

    Supported Timing TIMING FH(KHZ) SYNC TOTAL ACTIVE SYNC FRONT BACK PIXEL FV(HZ) POLARITY (DOT/LINE) (DOT/LINE) WIDTH PORCH PORCH FOREQ.(MHZ) (DOT/LINE) (DOT/LINE) (DOT/LINE) 640x350 31.469 25.175 VGA-350 70.087 – 640x400 24.83 – 21.05 NEC PC9801 56.42 – 640x400 31.469 – 25.175 VGA-GRAPH 70.087 640x400...
  • Page 14 2.4.4 85Hz refresh rate Support Monitor should display 85Hz refresh rate mode as emergency mode. Monitor should display “Out of Range” warning menu at this mode. 2.4.5 Video input Connector Analog Video input Connector: 15pins mini D-Sub Table 2.4.5. Pin assignment for D-sub connector Separate Sync RED VIDEO GREEN VIDEO...

  • Page 15: Controls

    2.5 CONTROLS 2.5.1 Control panel (monitor front panel) 1. Stereo Speakers (EP877) 2. Speaker Volume Control (EP877) 3. Soft Power Switch 4. DC Power-On Indicator 5. Function select Buttons 6. Adjustment Control Buttons 7. External Headphone Jack (EP877) Note: When OSD Menu is off, press button 2 and 3 at the same time can activate “Auto Adjustment”...
  • Page 16 Description: • Brightness: Brightness adjustment, the range from 0 to 100. Default = 80 • Contrast: Contrast adjustment, the range from 0 to 100. Default = 80 • H. Position: Horizontal position adjustment. • V. Position: Vertical position adjustment. • Phase: Focus adjustment, the range from 0 to 100 steps.

  • Page 17: White Color Temperature

    Comment: • 1280x1024: Current mode resolution. • 60 HZ: Current mode vertical frequency±1Hz. • VER 1.00: Firmware revision. Other features: Intellectual-Auto EP877/878 can start the Auto-Adjustment automatically when input a new display mode at first time. After the adjustment, EP877/878 will remember this mode and switch to optimized condition automatically for this mode whenever encounter this mode again.

  • Page 18: Power Supply

    2.7 POWER SUPPLY 2.7.1 input Voltage Range The monitor shall operate within specification over the range of 90 to 264VAC power supply. 2.7.2 Input Frequency Range Input power frequency range shall be from 47.5 to 63Hz over the specified input voltage range.

  • Page 19: Plug & Play(Edid)

    2.7.4 Power Management 2.7.4.1 Meet VESA DPMS proposal The monitor must comply with the Microsoft On Now specification, with a minimum of three power management states, as defined by the VESA DPMS document. The front panel of the monitor must appropriately display the DPMS state, For example: DPMS ON : The power LED is Green...

  • Page 20: Audio Technical Specification (Ep877 Only)

    2.9 Audio Technical specification (CML178SXW B Only) 2.9.1 General Description: Output power : 1W + 1W maximum Total harmonic distortion : Less than 1% (except speakers distortion) Input signal sensitivity : 0.5Vrms for full output Input impedance : 47Kohm +/- 5% Frequency response range : 100Hz –...

  • Page 21: Vl-750 Display Control Board

    3. VL-750 DISPLAY CONTROL BOARD Description The VL-750 display control board is design to directly receive R, G, B Analog signal to optimum LCD timing signals so as to construct a high display quality LCD monitor. 3.2 Features • Support for image expansion and reduction. •...

  • Page 22: System Block Diagram

    System Block Diagram 3.4 Connector Locations...

  • Page 24: Connector Type

    3.5 Connector Type Location Type Maker Number of pins 98210-4011 E&T CN302 98115-0313 E&T CN301 4300-11P E&T 96113-0803 E&T D-SUB E&T 3.6 Signal Pin & Description 3.6.1 CN302 Pin No. Signal Comment Audio-RIN Audio Right Input Audio-LIN Audio Left Input 3.6.2 CN301 Pin No.

  • Page 25: Vk-723 Control Panel Board

    4. VK-723 Control Panel Board 4.1 Description The VK-723 is designed to offer a user interfaced control panel which passes and receives signals to and from VK-723 display control board. 4.2 Connector and Switch Locations 4.3 Connector type Location Type Maker Number of pins J4,J1((VK-720) 4301-08...

  • Page 26: Power Supply & Inverter Board

    4.8~5.2Vdc +13Vdc +25%/-10% 2.2A 11.7~16.25Vdc • Total output power: 48 Watt max. for CML178SXW B 40 Watt max. for CML176SXW • Withstanding voltage : 1.5KVac or 2.2KVdc for 1 minute. • Leakage current : < 0.25mA/100Vac, <3.5mA/230Vac • Efficiency :...

  • Page 27: Inverter (Dc To Ac Section)

    5.3 Inverter (DC to AC Section) 5.4 Electrical characteristics 5.4.1 FOR HYDIX PANEL (HT17E13-100-110) MIN. TYP. MAX. COMMENT INPUT VOLTAGE 11.4V 13.0V 16.25V 13V+25% / -10% Vin=13V, INPUT CURRENT -------- -------- Vbrite=3.3V Normal BACKLIGHT -------- 700V rms. -------- VOLTAGE LAMP CURRENT 3mA rms.

  • Page 28: Connector Locations

    5.5 Connector locations 5.5.1 Connector type Location Type Maker Number of pins J903,J904, J905,J906 SM02B-BHSS-1 J802 96113-1203 E&T P801 SA-4S-066 AC Inlet J701 SCJ03451X9 J702 98115-0313 E&T...
  • Page 29 5.5.2 Connector pin assignment 5.5.2.1 J903, J904, J905, J906 Pin NO. Signal Comment High voltage for lamp LOW voltage for lamp 5.5.2.2 J802 For Display control board (Interface) Pin NO. Signal Comment +5Vaudio +5Vdc for Audio ckt GND/Audio Ground for Audio ckt Common Ground BRITE Brightness adjustable range:...

  • Page 30: Troubleshooting

    6. TROUBLESHOOTING 6.1 Main Procedure EP877/878...
  • Page 31 6.1.1 Power Circuit and Backlights Troubleshooting...
  • Page 32 6.1.2 Performance Troubleshooting...
  • Page 33 6.1.3 Function Troubleshooting...

  • Page 34: Mechanical Requirements

    7. MECHANICAL REQUIREMENTS 7.1 Vibration and Shock All testing shall be done in each of three mutually perpendicular axes, referenced to the position of the system as it is in front of the user (i.e., front-to back, side-to-side, and top-to- bottom).

  • Page 35: Dimension Size And Weight

    7.3 Dimension Size and Weight Dimension size 374 (W) x 387 (H) x 190 (D) Net Weight Gross Weight 7.4 Gap Spec. 7.4.1 The step between front bezel and back cover shall be within specification. Left and Right Back cover concavity Back cover concavity 0 mm ≤...

  • Page 36: Tilt Base Rotation

    LCD Horizontally 7.4.2 The angle between front bezel and LCD unit in bottom side should not large than 1.0mm. The angle between front bezel and LCD unit in bottom side should not large than 4.0mm. 7.5 Tilt Base Rotation Tilt up 30º 2°/ down 5º 2° 7.6 Plastic Material Front Bezel ABS 94V-0 Back Cover ABS 94V-0...

  • Page 37: Gap Spec

    7.7 GAP Spec. Gap between panel with bezel is 0 mm < gap < 1.2 mm ES678-E01...

  • Page 38: Power Line Transient Test (Iec 61000-4-4 Fast Transients/Burst)

    8. POWER LINE TRANSIENT TEST (IEC 61000-4-4 FAST TRANSIENTS/BURST) TEST CONDITIONS & PROCEDURE: (Follow IEC 61000-4-4) Test Condition : The condition is base on operating with 50Ω load. 8.1 Peak Voltage: 2 KV (applies the Level 3 typical Industrial Environment” of IEC 61000-4-4) 8.2 Polarity : + / -...
  • Page 39 WAVESHAPE...

  • Page 40: Power Line Surge Test (Iec 61000-4-5 Surge)

    9. POWER LINE SURGE TEST (IEC 61000-4-5 SURGE) 9.1 Climatic Condition The climatic conditions shall be within the following ranges: ° ° 9.1.1 Ambient Temperature: 15 C to 35 9.1.2 Relative Humidity: 10% to 75% 9.1.3 Atmospheric Pressure 86kPa (860mbar) to 106kPa (1060mbar) Note: The temperature and relative humidity should be recorded in the test report.

  • Page 41: Environment Requirement

    10. ENVIRONMENTAL REQUIREMENT 10.1 Operating Temperature 5°C ~ 40°C Relative Humidity 20% to 80% Altitude Sea level to 8000ft 10.2 Storage or Shipment Temperature -20°C ~ +60°C Relative Humidity 5% to 85% Altitude Sea level to 40,000ft 10.2.1 TEST PROCEDURE •...

  • Page 42: Regulation Compliance

    11. REGULATION COMPLIANCE 11.1 This product complies with the most current revisions of following regulations: UL/CUL Standard for Safety of Information Technology Equipment including Electrical Business Equipment {UL 1950/ CSA C22.2 NO950} EN 60950/CB Scheme Safety of Information Technology Equipment including Electrical Business Equipment MPR 1990:8 Test methods for visual display units.

  • Page 43: Electrostatics Discharge (Esd)

    11.2 Electrostatics Discharge (ESD) E.S.D Test This test follow the IEC 61000-4-2 Discharge Voltage Level : Criteria Contact Discharge (KV) Air Discharge (KV) Class C ±4 ±4 Class B ±6 ±8 Class A ±8 ±15 Class A : Temporary degradation or loss of function or performance which requires operator Intervention or system reset.

  • Page 44: Quality And Reliability

    Ambient temperature : 15°C to 35°C Relative humidity : 30% to 60% 12. QUALITY AND RELIABILITY 12.1 QUALITY ASSURANCE Unless otherwise specified in this specification or the applicable purchase order, the supplier shall be responsible for maintaining a statistical process program or performing inspections that are sufficient to assure that the parts supplied meet the requirements specified herein.

  • Page 45: Appendix A: Pcba Assembly

    Appendix A: PCBA ASSEMBLY...

  • Page 47: Appendix B: Display Unit Assembly

    Appendix B: DISPLAY UNIT ASSEMBLY FOR HYDIS PANEL (EP877)
  • Page 48 FOR HYDIS PANEL (EP878)
  • Page 49 Schematic Diagrams U802 VOUT R821 C821 C826 HU AJIE 10 1/2W FUSE 102/1KV SA- 4S-066 L821 W803 W804 F801 R800 T801 CHOKE J802 P801 T2A/250V L804 Bead 0.2/ 1W FUSE EE-30 D821 ER1002F C823 C824 470uf/25V 470uf/25V Vinv BD801 W802 C801 2KBP06M R806...
  • Page 50 U802 VOUT R821 C821 C826 HU AJIE 10 1/2W FUSE 102/1KV SA- 4S-066 L821 W803 W804 F801 R800 T801 CHOKE J802 P801 T2A/250V L804 Bead 0.2/ 1W FUSE EE-30 D821 ER1002F C823 C824 470uf/25V 470uf/25V Vinv BD801 W802 C801 2KBP06M R806 R801 C825...
  • Page 51 DGND R234 4.7K BAV99 R235 DVI_DET ADC_VAA DGND BAV99 DVI_5V VGA_SCL 0.1u B0805/30 VGA_SDA DGND VGA_5V SHELL1 DGND DGND A Red BLM21P300S A Gm ADC_VAA A Blue VGA_DET A Hs A RTN RIN - RX2- DGND RX2- TX2- RX2+ GIN- RX2+ TX2+ BIN -...
  • Page 52 MCU_VCC R76 0 RESET# for AR877/899 : add R19,R20 TCM809# 4.7K DGND 4.7k 4.7k AUDIO_VOL5 + C25 BL_EN 10u/16V BL_BRIGHT DGND DGND R257 4.7k 100u/16V MCU_VCC 14.318MHz DGND DGND 0.1u C252 DGND 4.7k OSCO LCD_EN2 PC1* 100p PC0* PC3/PWM0 RSTB PC4/PWM1 SC_RSTN PD-AUDIO...
  • Page 53 CVDD25 DPLL25 B1206/600 DVI_PVCC ADC_VAA PLL_VAA LAVCC LPVCC IRQN + C185 C184 0.1u 100uF/16V DGND DPLL25 CVDD25 DVI_AVCC DGND P_ALE BB0/RSBB0+ P_RDn BB1/RSBB0- P_WRn BB2/RSBB1+ RSBB1+ P_CSn BB3/RSBB1- RSBB1- BUSTYPE BB4/RSBB2+ RSBB2+ BB5/RSBB2- RSBB2- RSBB3+/T0M TSTCKO BB6/RSBB3+/T0M ADC_VAA DGND VCON BB7/RSBB3-/T0P RSBB3-/T0P VREF...
  • Page 54 DGND DGND RSBB1+ RSRA3- RSBB1- RSRA3+ RSBB2+ RSRA2- RSBB2- RSRA2+ RSBB3+/T0M RSBB3+/T0M RSRA1- RSBB3-/T0P RSBB3-/T0P RSRA1+ RSGB1+/T2M RSGA3- 11 11 RSGB1+/T2M RSGB1-/T2P RSGA3+ RSGB1-/T2P RSGB2+/TCLK1M RSGA2- RSGB2+/TCLK1M RSGB2-/TCLK1P RSGA2+ RSGB2-/TCLK1P RSGB3+/T3M RSGB3+/T3M RSGA1- RSGB3-/T3P RSGB3-/T3P RSGA1+ RSCLKB+/T7M RSCLKA- RSCLKB-/T7P RSCLKA+ RSRB1+/T5M RSRB1-/T5P RSRB1+/T5M...
  • Page 55 AIC1085-33 VOUT PAN5V/12V CASE BLM21P300S C118 C120 TO252 0.1u C119 C121 220u/10V 220u/10V 0.1u C225 C226 0.01u 220u/10V DGND DGND DGND LPVCC DVI_PVCC PIN 118 ,121 BLM21P300S BLM21P300S Pin 49 BLM21P300S PIN 1 05 C186 C187 C188 C227 C228 C229 100uF/16V 0.1u 0.1u...
  • Page 56 V-AUDIO V-AUDIO C501 + C502 C508 0.1u V-AUDIO V-AUDIO 470uF/6.3V V-AUDIO V-AUDIO R512 R514 C505 AUDIO_GND AUDIO_GND 0.1u R515 100K# U501 R517 CN302 Mode C509 220uF/10V L501 BLM21P300S R503 C503 0.33uF R516 Vin A -OUT L502 BLM21P300S L503 BLM21P300S R504 R505 CN301 +OUT...
  • Page 57 Key Circuit Board...
  • Page 58 THE UPDATED PARTS LIST FOR THIS MODEL IS AVAILABLE ON ESTA...
  • Page 59 Fax: +46 (0) 8 562 711 13 Tel: +39 02 38073415 Servizio Clienti Email: [email protected] Fax: +39 02 48786381/2 Email: [email protected] 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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