Hitachi CML176SXW Service Manual Download Page 25

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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

E&T

J2 4301-11

E&T

J1 87502-0200

ACER

J3 87502-0200

ACER

JP1 SCJ-0348-C

SC 5

4.4 Connector pin Assignment

4.5 Switch definition

Location Definition

S1 Power

ON/OFF

S4,S2(VK-720)

Function select by clockwise direction

S5,S3(VK-720)

Function select by counter-clockwise direction

S2,S4(VK-720)

Adjust up

S3,S5(VK-720) Adjust

down

4.6 LED definition

Location Definition

Green for ON mode; Yellow for OFF mode; yellow for Power Saving
mode; Dark for DC power OFF mode.

Summary of Contents for CML176SXW

Page 1: ...enieur die Sicherheitshinweise und Hinweise zurProduktsicherheit indiesemWartungshandbuchzulesen SERVICE MANUAL MANUEL D ENTRETIEN WARTUNGSHANDBUCH 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 leproduit Die in diesem Wartungshandbuch enthalten...

Page 2: ...ocations 25 4 3 Connector type 25 4 4 Connector pin Assignment 25 4 5 Switch definition 25 4 6 LED definition 25 5 POWER SUPPLY INVERTER BOARD 26 5 1 Description 26 5 2 Power supply AC to DC section 26 5 3 Inverter DC to AC Section 27 5 4 Electrical characteristics 27 5 5 Connector locations 28 6 TROUBLESHOOTING 30 6 1 Main Procedure 30 7 MECHANICAL REQUIREMENTS 34 7 1 Vibration and Shock 34 7 2 P...

Page 3: ...tion mode AC input use AC 240V 40 10 ENVIRONMENT REQUIREMENT 41 10 1 Operating 41 10 2 Storage or Shipment 41 11 REGULATION COMPLIANCE 42 11 1 This product complies with the most current revisions of following regulations 42 11 2 Electrostatics Discharge ESD 43 12 QUALITY AND RELIABILITY 44 12 1 QUALITY ASSURANCE 44 12 2 RELIABILITY 44 Appendix A PCBA ASSEMBLY 45 Appendix B DISPLAY UNIT ASSEMBLY 4...

Page 4: ... LCD technology to provide a performance oriented product with no radiation This will alleviate the growing health concerns It is also a space saving design allowing more desktop space and comparing to the traditional 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 Panel Normal 17 panel Hydis...

Page 5: ...ings User brightness control Maximum unless otherwise specified User contrast control Typical unless otherwise specified User red white balance Green white balance and Blue white balance control In the center unless otherwise specified Power input 110Vac or 220Vac Ambient temperature 20 5 C 68 9 F Analog input mode 1280 x1024 60Hz 2 1 1 MEASUREMENT SYSTEMS The units of measure stated in this docum...

Page 6: ...color FRC Viewing angle CR 10 L R 75 75 Typ U D 65 65 Typ Luminance Uniformity 75 minimum Pc interface 1 Video RGB analog 0 7V peak to peak Sync TTL positive or negative 2 Digital TMDS Signal connector 15 pin Mini D type standard VGA video DVI D connector 3 5mm stereo audio jack Audio EP877 3 5mm miniature stereo Headphone jack EP877 Audio power 1Wrms 1Wrms 300Hz 20kHz S P L 10 dB EP877 Front cont...

Page 7: ...n Item Symbol Condition Min Typ Max Unit Rema rk Rising TR Response time Falling TF θ 0 12 16 ms Contrast Ratio CR θ 0 350 450 Luminance of white YL θ 0 250 300 Cd m2 White Uniformity δY 75 80 Wx 0 270 0 300 0 330 White Chromaticity Wy 0 305 0 335 0 365 Rx 0 607 0 637 0 667 Red Chromaticity Ry 0 317 0 347 0 377 Gx 0 246 0 276 0 306 Green Chromaticity Gy 0 584 0 614 0 644 Bx 0 113 0 143 0 173 Blue ...

Page 8: ...gle 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 CR Luminance with all pixels black Gmin Note 3 Definition of Response time Sum of TR TF 8 ...

Page 9: ...xecuted 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 Dual lamp current 13 0mA 6 5mA x2 Refer to note 1 on page 14 for more information Environment condition Ta 25 2 C Optical characteristics measurement setup 9 ...

Page 10: ...ition of Flicker level Flicker Voltage pp F x 100 LMD Voltage dc One maximum value of three estimated values For this test an LMD Light Measurement Device is needed with adequate response time to track any visible rate flicker component and with a voltage level output proportional To luminance intensity Test Pattern For dot inversion Driving Gray levels of foreground dots on the test panel Are G22...

Page 11: ...mine that point proceed as follows Using the background and foreground gray levels of step1 Gbkg and Gfg Turn on each box at a time Look for the case with the worst shadowing The box causing the worst case is the shadowing source or Bsrc Use Bsrc and the box opposite from it that lies directly in the shadow path That is the target box or Btgt Note that box Eight be either Bsrc or Btgt depending on...

Page 12: ...l separate horizontal and vertical sync or composite sync which are TTL compatible Polarity positive and negative Interface frequency The following frequency range is generalized by supported timing If the entered mode does not match the supported timing the display optimization will not be assured Horizontal Frequency 24KHz 80KHz analog 31 5 80KHz digital Vertical Frequency 56Hz 75Hz 12 ...

Page 13: ...0 VESA 600 60Hz 60 317 628 600 4 1 23 800x600 48 077 1040 800 120 56 64 50 VESA 600 72Hz 72 188 666 600 6 37 23 800x600 46 875 1056 800 80 16 160 49 5 VESA 600 75Hz 75 625 600 3 1 21 1024x768 48 363 1344 1024 136 24 160 65 XGA 60 004 806 768 6 3 29 1024x768 53 964 1328 1024 176 16 112 71 664 COMPAQ XGA 66 132 816 768 4 8 36 1024x768 56 476 1328 1024 136 24 144 75 VESA 768 70Hz 70 069 806 768 6 3 2...

Page 14: ...GROUND 6 RED GROUND 7 GREEN GROUND 8 BLUE GROUND 9 PC5V 5V DDC 10 CABLE DETECTION 11 GROUND 12 SDA 13 H SYNC 14 V SYNC 15 SCL 15 10 5 1 6 11 Color of plastic parts Blue PC99 D sub connector For Digital DVI D connector Signal Signal Signal PIN Description PIN Description PIN Description 1 RX2 10 RX1 19 Shield for TMDS Channel 0 2 RX2 11 Shield for TMDS Channel 1 20 NC 3 Shield for TMDS Channel 2 12...

Page 15: ...s 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 immediately OSD Functions OSD Format Refer to following figure OSD Border Cyan color OSD Tunable Item The 16 icons that around the border Selected Item Yellow background Comment Magenta foreground Blue background page format 15 ...

Page 16: ... either Analog or Digital Input video when VGA input or and DVI Input is are available Clock Frequency tracking adjustment The max range from 50 to 50 but some modes the range will be limited Graph Text 640x400 GRAPH or 720x400 TEXT mode select Language 9 kinds of language for description including English German French Spanish Italian Pyccknn Japanese simple Chinese complex Chinese Recall Recall ...

Page 17: ...877 878 show a black screen about 3 seconds If no further signal then it shows No Signal and enters power saving mode 2 6 White Color Temperature White color temperature is 4 preset as 9300 7500 6500 and User Default value of user color should be user which is maximum setting for panel Target of color setting Color Temp Color Co ordinate Tolerance Color Co ordinate Tolerance x y u v 9300K 0 283 0 ...

Page 18: ...d full load 0 6A max at 264VAC input and full load Inrush current cold start 30A 0 peak 110Vac 50A 0 peak 220Vac measured when switched off for at least 10 mins Output Tolerance Output Current Output Volt MIN MAX Volt Tolerance 5Vdc 5 0A 1 0A 4 8 5 2Vdc for EP877 5Vdc 5 0 05A 1 5A 4 8 5 2Vdc 13Vdc 25 10 0A 2 2A 11 7 16 25Vdc Total output power 48 Watt max for EP877 40 Watt max for EP878 Withstandi...

Page 19: ...LED is Amber Power Consumption On mode 40Wmax EP878 48Wmax EP877 Green Off mode 3Wmax Amber DC power off 3Wmax Dark disconnection 3Wmax Dark DC power off Amber DC power on Power saving states are measured with speakers attached but not worked The recovery time from stand by suspend off mode to on mode is 3 seconds maximun 2 7 6 Power Connector All units shall have an IEC CEE 22 type male power rec...

Page 20: ... Typ Max Comment Input Voltage V 5 Input Current m A 500 800 Audio Voltage Gain 500mVrms 1KHz 6dB Volume Max load 4Ω Frequency Response 500mVrms 300Hz 20KHz 10dB 10dB Volume Max load 4Ω Signal to Noise ratio 500mVrms 1KHz 40dB Volume Max load 4Ω Total harmonic distortion 500mVrms 1KHz 1 except speakers distortion Cross talk 500mVrms 1KHz 30dB Volume Max load 4Ω Output Watt 500mVrms 1KHz 1W Volume ...

Page 21: ...icro processor to detect display timings and control user functions Using Novatek design to generate optimum LCD timings Using E2 PROM to memorize every adjusted parameter Support up to 28 display modes from VGA to SXGA Offer full screen expansion function on non XGA mode automatic Support OSD functions Support VESA DPMS function Support DDC2B functions Support English and Japanese language for OS...

Page 22: ...System Block Diagram 3 4 Connector Locations 22 ...

Page 23: ...23 ...

Page 24: ...t Pin No Signal Comment 1 5 VDD Audio 5V 2 VR Audio Volume Control 3 L Audio Left Output 4 L Audio Left Output 5 AGND Analog GND 6 HP S HP Sense 7 HP L Audio Left Output Head Phone 8 HP R Audio Right Output Head Phone 9 AGND Analog GND 10 R Audio Right Output 11 R Audio Right Output Pin NO Signal Comment 1 LED Y Power saving mode 2 LED G Monitor is ON 3 GND GND 4 KEY ON OFF KEY ON OFF 5 KEY UP KEY...

Page 25: ...720 4301 08 E T 8 J2 4301 11 E T 11 J1 87502 0200 ACER 2 J3 87502 0200 ACER 2 JP1 SCJ 0348 C SC 5 4 4 Connector pin Assignment 4 5 Switch definition Location Definition S1 Power ON OFF S4 S2 VK 720 Function select by clockwise direction S5 S3 VK 720 Function select by counter clockwise direction S2 S4 VK 720 Adjust up S3 S5 VK 720 Adjust down 4 6 LED definition Location Definition D1 Green for ON ...

Page 26: ...input voltage range Quick specification review Input current 1 2A max at 90VAC input and full load 0 6A max at 264VAC input and full load Inrush current cold start 30A 0 peak 110Vac 50A 0 peak 220Vac measured when switched off for at least 10 mins Output Tolerance Output Current Output Volt MIN MAX Volt Tolerance 5Vdc 5 0A 1 0A 4 8 5 2Vdc for EP777 5Vdc 5 0 05A 1 5A 4 8 5 2Vdc 13Vdc 25 10 0A 2 2A ...

Page 27: ... max brightness Vin ON OFF sequence 0 5S OLP TIME 1S _ Open lamp protection time BRIGHTNESS RANGE 30 100 Brightness control 0 4V _ 3 3V 3 3V brightness max Brightness _ 300cd m2 _ Strike voltage at 0 C 1310Vrms _ _ Operating life time 40 000 hrs 50 000 _ note Note Life time hr can be defined as the time in which it continues to operate under the condition Ta 25 2 C IL 6 5mArms until one of the fol...

Page 28: ...nnector locations 5 5 1 Connector type Location Type Maker Number of pins J903 J904 J905 J906 SM02B BHSS 1 JST 2 J802 96113 1203 E T 10P P801 SA 4S 066 AC Inlet 3 J701 SCJ03451X9 SC 3 J702 98115 0313 E T 3 28 ...

Page 29: ...gnal Comment 1 5Vaudio 5Vdc for Audio ckt 2 GND Audio Ground for Audio ckt 3 4 GND Common Ground 5 BRITE Brightness adjustable range 0 4V min 3 3V max 6 N C 7 Enable Backlight ON OFF control Active High ON 1 5 5 5V OFF 0 3 1 0V 8 9 10 Vcc 5Vdc supply to Interface BD always on 5 5 2 3 J701 J702 For EP877 Pin NO Signal Comment 1 Audio RIN Audio Right Input 2 GND 3 Audio LIN Audio Left Input 29 ...

Page 30: ...6 TROUBLESHOOTING 6 1 Main Procedure EP877 878 30 ...

Page 31: ...6 1 1 Power Circuit and Backlights Troubleshooting 31 ...

Page 32: ...6 1 2 Performance Troubleshooting 32 ...

Page 33: ...6 1 3 Function Troubleshooting 33 ...

Page 34: ...ct Random Vibration 0 008G2 Hz 10 to 500Hz nominal 2 GRMS The test shall be for one hour for each of the three axes Sinusoidal Vibration 0 75G zero to peak 10 to 500Hz 0 5 octave minute sweep rate This requires one sweep 10 to 500 to 10Hz along each of the three axes The unit should suffer minimal visible cosmetic damage or damage that presents a safety hazard or impairs the setup and operation of...

Page 35: ... x 387 H x 190 D Net Weight 5Kg Gross Weight 7Kg 7 4 Gap Spec 7 4 1 The step between front bezel and back cover shall be within specification Top Left and Right Back cover concavity Back cover concavity 0 mm A 0 8mm 0 mm A 0 8mm ES678 E04 ES677 E01 35 ...

Page 36: ...mm 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 The Others ABS 94HB TCO 99 Optional Front Bezel PC ABS 94 5V BACK COVER PC ABS 94 5V The others ABS 94 HB 36 ...

Page 37: ...7 7 GAP Spec Gap between panel with bezel is 0 mm gap 1 2 mm ES678 E01 37 ...

Page 38: ...ms 20 8 9 Climatic Conditions Ambient Temperature 15 C to 35 C Relative Humidity 45 to 75 Atmospheric Pressure 86kPa to 106kPa 8 10 Test Procedure The monitor Display set high resolution mode AC input use AC 240V Note 8 10 1 8 10 2 IEC 61000 4 4 defines that power supply I O line and control line all shall be performed the transient test but the I O line and control line is applied with only half ...

Page 39: ...WAVESHAPE 39 ...

Page 40: ...humidity should be recorded in the test report Atmospheric Pressure 86kPa 860mbar to 106kPa 1060mbar Relative Humidity 10 to 75 Ambient Temperature 15 C to 35 C 9 3 The surge will be applied between lines and between lines and ground 9 4 If not otherwise specified the surge to power supply circuits shall be applied synchronized to the voltage phase at the zero crossing and the peak value of the AC...

Page 41: ...orage or Shipment Temperature 20 C 60 C Relative Humidity 5 to 85 Altitude Sea level to 40 000ft 10 2 1 TEST PROCEDURE Put in temperature chamber under 60 C Time 24 hours Back to room temperature Time 4 hours Put in temperature chamber under 20 C Time 24 hours Back to room temperature Time 4 hours The process repeats 2 times 41 ...

Page 42: ...places in the office sector FCC 47 CFR Chapter 1 Subchapter A Part 15 Subpart B A digital device that is marketed for use in a residential environment not withstanding use in commercial business and industrial environments CISPR 22 Limits and methods of measurements of radio interference characteristics of information technology equipment CE LVD Directive 73 23 EEC Safety EN60950 CE EMC Directive ...

Page 43: ...Intervention or system reset Class B Temporary degradation or loss of function or performance which is self recoverable Class C Normal performance within the specification limits Discharge times 20 times for each discharge point time interval 1 second In the case of acceptance tests the test program and the interpretation of the test results are subject to agreement between manufacturer and user T...

Page 44: ...ecification 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 12 2 RELIABILITY The product shall have a designed MTBF of greater than 20 000 hours during its useful life ...

Page 45: ...Appendix A PCBA ASSEMBLY 45 ...

Page 46: ...46 ...

Page 47: ...FOR HYDIS PANEL EP877 Appendix B DISPLAY UNIT ASSEMBLY ...

Page 48: ...FOR HYDIS PANEL EP878 ...

Page 49: ...01 R915 10K W802 L805 Bead R913 22 U802 1 3 2 VIN VOUT GND C824 470uf 25V 1 2 L704 Bead R804 510K 1206 R908 61 9K 1 R813 1 8 C921 223 R823 470 1W C827 1000uf 10V 1 2 R906 80 6K 1 C800 222 Y1 W804 D914 BAV99 1 3 2 U800 LTV 817M B J905 1 2 HV LV J904 1 2 HV LV R809 27K T801 EE 30 3 6 1 2 5 12 8 4 9 10 11 7 R936 1 15K 1 C910 104 L702 Bead Q907 AP4410 1 2 3 4 5 6 7 8 S S S G D D D D Q902 2N7002 2 3 1 ...

Page 50: ...FB CMP PDRV_C NDRV_D NDRV_B R847 2 2K R827 4 99K 1 TVS1 P6KE180A C828 1000uf 10V 1 2 C920 R821 10 1 2W FUSE Q904 AP4435 1 2 3 4 5 6 7 8 S S S G D D D D L821 CHOKE C800 222 Y1 C803 0 33uf X2 U802 1 3 2 VIN VOUT GND C703 1 2 C810 103 W802 W804 L704 C931 22p 3KV C914 473 C825 470uf 25V 1 2 R807 C912 221 NPO C905 10U 50V C824 470uf 25V 1 2 D901 0 1 2 R812 1 8 R916 10K R914 22 R810 27K 1 8W L804 Bead C...

Page 51: ...TXC Shld TXC TXC SHELL1 SHELL2 A Red A Blue A Gm A Hs A RTN D14 BAV99 1 3 2 R46 0 R44 22 L15 B0805 30 D16 BAV99 1 3 2 FB1 BLM21P300S C19 10p R42 22 R48 0 L17 B0805 30 C216 10uF C18 0 1u ZD1 ZD5V6 U3 74LVC14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 D0 Q0 D1 Q1 D2 Q2 GND Q3 D3 Q4 D4 Q5 D5 VCC R36 75 R29 27 R47 0 D15 BAV99 1 3 2 D17 BAV99 1 3 2 R31 4 7K R34 100 R37 2 2k R30 75 D6 BAV99 1 3 2 CN1 DB15 8 15 7 ...

Page 52: ... 10 R62 1M R184 10K C218 0 1u C33 100p R61 15k ZD6 ZD5V6 D22 1N4148W A C R243 100 U15 24LC21 8 4 1 2 3 7 6 5 VCC GND NC NC NC VCLK SCL SDA C222 0 1u R229 47 R74 10 C215 0 1u Y1 14 318MHz R19 4 7K U5 24LC16B 1 2 3 4 5 6 7 8 A0 A1 A2 GND SDA SCLK WP VCC R75 0 C30 0 1u R22 4 7k ZD5 ZD5V6 C10 1uF C25 10u 16V R66 47 R233 47 U4 NT68F633 41 42 43 10 44 12 22 20 21 11 13 16 17 15 14 24 23 9 8 7 6 32 40 39...

Page 53: ...D PWM0 GPIO4 PWM1 GPIO5 SPB DVDD LVDS_AVCC BB0 RSBB0 BB1 RSBB0 BB2 RSBB1 BB3 RSBB1 BB4 RSBB2 BB5 RSBB2 BB6 RSBB3 T0M BB7 RSBB3 T0P DGND LVDS_AGND GB0 RSGB0 T1M GB1 RSGB0 T1P GB2 RSGB1 T2M GB3 RSGB1 T2P GB4 RSGB2 TCLK1M GB5 RSGB2 TCLK1P GB6 RSGB3 T3M GB7 RSGB3 T3P LVDS_GND LVDS_VDD DVDD LVDS_AVCC LVDS_GND LVDS_VDD RB0 RSRB0 T4M RB1 RSRB0 T4P RB2 RSRB1 T5M RB3 RSRB1 T5P RB4 RSRB2 T6M RB5 RSRB2 T6P R...

Page 54: ... 27 24 21 31 32 CN7 LVDS CON DF14 30P 1 25H 31 32 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 GND GND C251 0 1u R126 2 2k C223 470u 25V C250 0 1u RSGA2 3 RSBA1 3 RSBA3 3 RSCLKA 3 RSRA2 3 RSBB2 3 RSGA2 3 RSBA2 3 RSBB1 3 RSRA2 3 RSGA3 3 RSGA3 3 RSBA2 3 RSBA1 3 RSGA1 3 RSRA3 3 RSBB2 3 RSBA3 3 RSBB1 3 RSGA1 3 RSRA1 3 RSRA3 3 RSCLKA 3 RSRA1 3 RSBB3 T0M 3 RSRB2 T6P 3...

Page 55: ...01 0 1u C233 0 1u L59 BLM21P300S C120 0 1u L60 BLM21P300S L56 BLM21P300S R251 10K U13 APL1117 25 3 1 2 4 VIN ADJ VOUT CASE U10 AIC1085 33 3 2 1 4 VIN VOUT GND CASE C97 0 1u C106 0 1u NC C93 0 1u C91 0 1u R276 270 L61 BLM21P300S C226 0 01u R249 1K R248 22 C231 0 1u C132 220u 10V C188 0 1u R250 2 2K C225 220u 10V C119 220u 10V C186 100uF 16V L63 BLM21P300S Q2 MMBT3904 1 3 2 C103 0 1u L65 BLM21P300S ...

Page 56: ...1P300S R519 100 R506 20K R513 0 C51168P C503 0 33uF R510 100k L503 BLM21P300S R522 10k R514 20k R517 1k R505 20K C505 0 1u R508 BEAD CN302 CON3 1 2 3 C502 470uF 6 3V U501 LM4838 1 8 14 20 23 11 25 24 28 26 21 15 17 18 19 3 27 16 6 4 12 13 10 9 7 2 5 22 VSS 1 VSS 2 VSS 3 VSS 4 VSS 5 Beep R2fin R2in OUT B OUT B HP IN OUT A OUT A L2fin L2in Gain Sel VCC 3 VCC 2 VCC 1 Mode Vin A Vo A Vin B VO B DC Vol...

Page 57: ...Key Circuit Board ...

Page 58: ...THE UPDATED PARTS LIST FOR THIS MODEL IS AVAILABLE ON ESTA ...

Page 59: ...47 Milano Italia ITALY Tel 39 02 487861 Tel 39 02 38073415 Servizio Clienti Fax 39 02 48786381 2 Email customerservice italy hitachi eu com HITACHI Europe AB Box 77 S 164 94 Kista SWEDEN Tel 46 0 8 562 711 00 Fax 46 0 8 562 711 13 Email csgswe hitachi eu com HITACHI EUROPE S A S Lyon Office B P 45 69671 BRON CEDEX FRANCE Tel 33 04 72 14 29 70 Fax 33 04 72 14 29 99 Email france consommateur hitachi...

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