Hitachi 42EDT41A Service Manual Download Page 87

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Summary of Contents for 42EDT41A

Page 1: ... cooled sufficiently 3 Special care should be exercised in the proximity of the display area in order not to damage its surface 4 The Panel Module should not be touched with bare hands as this will protect its surface from stains 5 It is recommended to use clean soft gloves during the repair work in order to protect not only the display area of the Panel Module but also the technician 6 The Chip T...

Page 2: ... physical ground Using an insulation tester DC500V connect one of its leads to the AC plug jumper and touch with the other lead each exposed metal part antennas screwheads metal overlays control shafts etc particularly any exposed metal part having a return path to the chassis should have a resistor reading over 4MΩ Any resistance value below this range indicates an abnormality which requires corr...

Page 3: ...e take special care with this fragile circuitry particularly Flexible Printed Circuits bonded to surrounding edges of the glass panel They are not strong enough to withstand harsh outer mechanical forces Avoid touching the flexible printed circuits by not only your hands but also tools chassis or any other object Extreme bending of the connectors must be avoided too In case the flexible printed ci...

Page 4: ...Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are called Electrostatically Sensitive ES Devices Examples of typical ES devices are integrated circuits and some field effect transistors and semiconductor chip components The following techniques should be used to help reduce the incidence of componen...

Page 5: ...placement IC in the circuit board 2 Carefully bend each IC lead against the circuit foil pad and solder it 3 Clean the soldered areas with a small wire bristle brush It is not necessary to reapply acrylic coating to areas Small signal Discrete Transistor Removal Replacement 1 Remove the defective transistor by clipping its leads as close as possible to the component body 2 Bend into a U shape the ...

Page 6: ... only on IC connections 1 Carefully remove the damaged copper pattern with a sharp knife Remove only as much copper as absolutely necessary 2 Carefully scratch away the solder resist and acrylic coating if used from the end of the remaining copper pattern 3 Bend a small U in one end of a small gauge jumper wire and carefully crimp it around the IC pin Solder the IC connection 4 Route the jumper wi...

Page 7: ...ring pads with tweezers or with a miniature alligator clip and apply heat to the pad area with a 30 watt iron until solder flows Do not apply heat for more than 3 seconds How to Replace Flat lC Required Tools Soldering iron iron wire or small awl De solder braids Magnifier 1 Remove the solder from all of the pins of a Flat lC by using a de solder braid 2 Put the iron wire under the pins of the Fla...

Page 8: ...outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio television technician for help Modifications The FCC requires the user to be notified that any changes or modifications made to this device that are not expressly approved by Hitachi Home Electronics America Inc may void the user s warranty Cables Connections to this device must be...

Page 9: ...ternational Business Machines Corporation of the U S A Apple and Macintosh are registered trademarks of Apple Computer Inc VESA is a trademark of a nonprofit organization Video Electronics Standard Association This Class B digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations This Class B digital apparatus complies with Canadian ICES 003 Cet appareil n...

Page 10: ... D sub on the monitor is male Therefore the cable interface to the monitor should be female 1 3 The cable is configured in a null modem wiring scheme 1 4 A pin reference illustrations is provided below Figure 1 a Male 9 pin D sub Outside View Figure 1 b Female 9 pin D Sub Outside View 1 5 Electric Electrical specification is based on the current RS232C standard 2 Communication Format 2 1 Port Conf...

Page 11: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 Start Stop Figure 3 3 Television Answer Format Showing current Status The television responds with a 6 byte answer strings as follows Start 1 byte 02 Hex STX Response 4 byte Upper Data Lower Data Stop 1 Byte 03 Hex ETX 1 2 3 4 5 6 Start Stop Figure 4 4 Television Answer Format Status of Command Execution Acknowledgement 06 Hex ACK No Acknowledgement 15 Hex NAK ACK ...

Page 12: ...nd when an attempt to turn terminal mode on or off is made with either an ACK or a NAK 7 In the following cases even if the check box of menu is checked Terminal mode cannot be turned on Adjust mode While Event Timer and Timer Recording While Auto CH scan operates While upgrade operates 8 Write function in terminal mode will write data to the EEPROM in the same manner as when unit is operated in N...

Page 13: ...command sent to the television as shown in table 3 2 1 2 The television will respond with an answer as shown in table 3 2 2 In the event that a command is rejected by the television an Hex 15 will be sent to the PC Table 3 2 2 Answer format from television to PC 1 Character Code Example 0 9 30 39 A F 41 46 Start Stop Received byte 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Contents Start 1st 2nd 3rd 4th 5th...

Page 14: ...nfo Write c 2 INPUT 6F R W 0000 Info Write c 3 Volume 27 R W 0000 Volume Bar c 4 Balance 28 R W 0000 No OSD c 5 Treble 2B R W 0000 No OSD c 6 Bass 2A R W 0000 No OSD c TV Mode 7 Audio Mute 29 R W 0000 No OSD c 8 Picture Mode A4 R W 0003 Day Night c 9 Contrast 59 R W 0000 No OSD c 10 Brightness 1F R W 0000 No OSD c 11 Color 10 R W 0000 No OSD c 12 Tint 13 R W 0000 No OSD c 13 Sharpness 14 R W 0000 ...

Page 15: ... On 0 2 Input 0 Input 1 1 Input 2 2 Input 3 3 Input 4 4 Input 5 6 Ant A 7 Ant B 9 Photo Input 3 Volume 0 63 Step 20 4 Balance 0 20 Step 10 5 Treble 0 20 Step 10 6 Bass 0 20 Step 10 7 Audio Mute 0 Off 1 On 2 Soft Mute 0 8 Picture Mode 0 Day 1 Night 0 9 Contrast 0 68 Step 10 Brightness 0 60 Step 11 Color 0 60 Step 12 Tint 0 60 Step 13 Sharpness 0 60 Step 14 Color Temperature 0 High 1 Medium 2 Standa...

Page 16: ...Off 1 On 0 17 Direct CH 0 9 Key Code 0 9 0 9 18 Direct Channel 0 19 Direct Channel Select 0 20 Auto Movie Mode 0 Off 1 On Auto 0 RGB Mode 21 Contrast 0 68 Step 22 Brightness 0 60 Step 23 Color Temperature 0 High 1 Medium 2 Standard 3 Black White 24 Aspect 0 16 9 Std 1 2 4 3 Std 3 4 5 6 Real ...

Page 17: ... the Sleep Timer will be cleared The Event Timer Timer Rec will not operate when the unit is Terminal Mode On If the Terminal Mode is activated when the Auto Link Setting is in Stand By The Auto Link operation will be cancelled The Urgent Broadcast Signal will take precedence when Terminal Mode is on with the CableCARD installed The Magic Timer function is disabled when Terminal Mode is On 2 Other...

Page 18: ...ng to create a complete command 4 3 Figure 6 shows the 14 byte string formatted in Hex Characters for the Power On Function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Start Stop 02 6 E 0 0 0 0 0 0 0 0 0 1 Figure 6 4 4 Figure 7 shows the Power On function converted to Hex Code set 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Start Stop 02 36 45 30 30 30 30 30 30 30 30 30 31 Hex Character Hex Code 0 30 1 31 2 32 3 33 4 3...

Page 19: ...0001 323930303030303030303031 Set to On 17 Picture Mode Set to Day 0 A40000000000 413430303030303030303030 Set to Day 18 Picture Mode Set to Night 0 A40000000001 413430303030303030303031 Set to Night 19 Contrast Set to 59 60 590000000059 353930303030303030303539 Set to 59 20 Brightness Set to 29 30 1F0000000029 314630303030303030303239 Set to 29 21 Color Set to 29 30 100000000029 31303030303030303...

Page 20: ...40000000000 443430303030303030303031 Auto Movie On Auto RGB Mode 41 Contrast Set to 59 60 590000000059 353930303030303030303539 Set to 59 42 Brightness Set to 29 30 1F0000000029 314630303030303030303239 Set to 29 43 Color Temperature Set to High 600000000000 363030303030303030303030 Set to High 44 Color Temperature Set to Medium 600000000001 363030303030303030303031 Set to Medium 45 Color Temperat...

Page 21: ... Processor A wide range of personal computer signals can be handled from 640 x 400 640 x 480 VGA to 1600 x 1200 UXGA RGB Analog input Easy to use remote control and on screen display system OSD The remote control included eases the work of setting display controls Further the on screen display OSD displays the input status control settings in an easy to view fashion Power saving system The Interna...

Page 22: ...nput signals Input terminals Input terminals RF Video System AV1 composite video input terminal RCA AV1 Y PB PR video input terminal RCA AV1 L R audio input terminal RCA AV2 composite video input terminal RCA AV2 Y G PB B PR R video input terminal RCA AV2 L R audio input terminal RCA AV3 composite video input terminal RCA AV3 S video input terminal RCA AV3 L R audio input terminal RCA AV4 composit...

Page 23: ... signals shown on the following page there may be instances when correct display is not possible In this case use H V separate sync H V composite sync Sync signal type Priority H V separate sync 1 H V composite sync 2 sync on Green 3 Pin Input signal 1 R PR CR 2 G or sync on green Y 3 B PB CB 4 No connection 5 No connection 6 R GND PR CR GND 7 G GND Y GND 8 B GND PB CB GND 9 No connection 10 GND 1...

Page 24: ...commended Signal List With Digital RGB signal input RGB1 input With Analog RGB signal input RGB2 input Make sure that the signal of the equipment to be connected is compatible with the pecifications of this list ...

Page 25: ... Hz 1 NTSC M 525 59 94 15 73 With Composite Input AV1 AV4 input and S video Input AV3 and AV4 input No Signal mode Horizontal frequency kHz Dot clock frequency MHz Remarks Signal Name Resolution Vertical frequency Hz 1 NTSC M 525 59 94 15 73 With R G B Video input AV2 and AV4 input No Signal mode Horizontal frequency kHz Dot clock frequency MHz Remarks Signal Name Resolution Vertical frequency Hz ...

Page 26: ...anel Main power switch The main power switch is located at the back on the lower surface Indicating lamp for 42EDT41A Remote control Main unit for CMP420V1A CMP420V2A NOTE 1st number indicates normal button operation 2nd number indicates function during MENU Rear Label 7 6 5 4 3 2 1 OK 2 VOL 2 ADJ 1 SUB POWER 3 VOL 3 ADJ 4 PROGRAM 4 SELECT 5 PROGRAM 5 SELECT 6 INPUT SELECT 6 OK 7 MENU ...

Page 27: ...er from soldered joints when replacing components If leaded solder should be added to existing lead free joints mix in the leaded solder thoroughly after the lead free solder has been completely melted do not apply the soldering iron without solder Servicing soldering iron A soldering iron with a temperature setting capability temperature control function is recommended The melting point of lead f...

Page 28: ... function during MENU Rear Label 7 6 5 4 3 2 1 OK 2 VOL 2 ADJ 1 SUB POWER 3 VOL 3 ADJ 4 PROGRAM 4 SELECT 5 PROGRAM 5 SELECT 6 INPUT SELECT 6 OK 7 MENU 1 2 6 BURN IN MODE ON With unit in standby mode turned off press and hold After the unit comes on continue to hold the buttons down until the initial OSD goes away OSD will then appear indicating that BURN IN MODE is engaged OSD Burn In On 1 2 BURN ...

Page 29: ...s function during MENU Rear Label 7 6 5 4 3 2 1 OK 2 VOL 2 ADJ 1 SUB POWER 3 VOL 3 ADJ 4 PROGRAM 4 SELECT 5 PROGRAM 5 SELECT 6 INPUT SELECT 6 OK 7 MENU DEMO MODE OFF With unit in standby mode turned off press and hold After the unit comes on continue to hold the buttons down until the initial OSD goes away DEMO MODE is now disengaged although you will not see any OSD confir mation 1 3 DEMO MODE ON...

Page 30: ...7 MENU I2C Adjustment Mode With unit in standby mode turned off press and hold After the unit comes on continue to hold the buttons down until the initial OSD goes away OSD will then appear indicating that I2C ADJUSTMENT MODE is engaged 9 1 4 6 MEMORY INITIALIZATION Donʼt indiscriminately perform this procedure as it can result in a loss of data if the old val ues were not recorded 1 Engage I2C Ad...

Page 31: ...n operation 2nd number indicates function during MENU Rear Label 7 6 5 4 3 2 1 OK 2 VOL 2 ADJ 1 SUB POWER 3 VOL 3 ADJ 4 PROGRAM 4 SELECT 5 PROGRAM 5 SELECT 6 INPUT SELECT 6 OK 7 MENU Factory Reset With unit in standby mode turned off press and hold After the unit comes on continue to hold the buttons down until the initial OSD goes away Factory Reset has now engaged although you will not see any O...

Page 32: ...on volume channel menu input etc will cause the unit to exit from the Diagnosis mode 11 SERVICE MODE ACCESS DIAGNOSIS MODE Code Problem Phenomenon Cause H11 Tuner problem Can not receive the main signal from antenna U101 error H15 Composite video SW IC problem Can not receive picture and audio can not change input mode I201 error H16 Component video SW IC problem No component picture can not chang...

Page 33: ...OR RF PAL SECAM SUB 3 8 40 SUB_COLOR VIDEO NTSC SUB 15 10 41 SUB_COLOR RF NTSC SUB 15 8 46 S_B Y_ADJ MAIN 15 8 47 S_R Y_ADJ MAIN 15 8 48 S_B Y_ADJ SUB 15 8 49 S_R Y_ADJ SUB 15 8 50 BPF_Q 4 43MHz MAIN 3 3 51 BPF_f0 4 43MHz MAIN 3 1 52 Y_DL 4 5MHz For Asia MAIN 10 5 53 Y_DL 5 5MHz PAL NTSC4 43 For Asia MAIN 10 3 54 Y_DL 5 5MHz SECAM For Asia MAIN 10 0 55 Y_DL 6 0PAL NTSC4 43 For Asia MAIN 10 9 56 Y_...

Page 34: ... 3 0 90 AFC_GAIN AV3 3 0 91 AFC_GAIN AV4 3 0 92 S_INHBT 1 0 93 S_ID 1 0 94 S_GP 3 0 95 S_V_ID 1 0 96 BELL HPF 3 3 97 Cb offset1 MAIN 15 8 98 Cr offset1 MAIN 15 8 99 Cb offset1 SUB 15 8 100 Cr offset1 SUB 15 8 101 Sharpness Gain VIDEO PAL MAIN 15 10 102 Sharpness Gain RF MAIN 5 8 103 Sharpness EQ 4 5MHz MAIN 3 1 104 Sharpness EQ 5 5MHz MAIN 3 1 105 Sharpness EQ 6 0 6 5MHz MAIN 3 1 106 Sharpness EQ ...

Page 35: ...On Off Setting at Initialize Reset and Shipping 0 Change 1 Don t Change 2 0 177 DVI STB RGB COMPONENT Function available 0 NO 1 YES 1 0 178 Dynamic Backlight function 0 No 1 Yes For LCD model 1 1 179 ISM Control for WVGA 1 1 180 Terminal Mode Function available 0 Not Available 1 Available RS232C 1 0 181 Black insert function 0 Not available 1 Available For Dynamic mode or Day mode For LCD model on...

Page 36: ...63 33 235 Demonstration White 0 3 None 4 0 5 10W 6 20W 7 30W Mode common 7 5 236 Demonstration 0 Normal 1 Peak Mode 1 1 237 Demonstration Middle 0 0W 1 10W 2 20W 3 30W Mode common 3 3 238 Demonstration 0 Normal 1 Peak Mode 1 0 239 Horizontal Enhance TEXT 3 3 240 YNR Input Level at Low level for DVI STV Mode 1080i 60 1080i 50 720p 60 7 2 241 YNR Input Level at Low level for DVI STV Mode 480i 480p 5...

Page 37: ...de 254 90 307 Component Frq fH Setup 0 28 31 33 45KHz 1 28 31 45KHz 1 0 308 Terget value of White peak Adj Single Picture mode 237 235 309 Sharpness Gain S VIDEO Main 15 7 310 Sharpness Gain S VIDEO Sub 15 7 311 Select color control 0 Asia 1 South America Main Sub 1 0 312 Sharpness Gain Main N PAL 15 8 313 Sharpness f0 Main N PAL 3 2 314 Sharpness Gain Sub N PAL 15 9 315 Sharpness f0 Sub N PAL 3 2...

Page 38: ...s f0 L MAIN 3 2 374 BURN IN enable disenable 0 Disenable 1 Enable 1 1 375 BURN IN mode 2 2 376 CM_THRESHOLD D15 D8 254 0 377 CM_THRESHOLD D7 D0 254 36 378 Sharpness Gain RF M MAIN 15 11 379 Sharpness Gain RF M Sub 15 11 380 Sharpness f0 RF M Main 3 2 381 Sharpness f0 RF M SUB 3 2 382 Counting value of 2ms Sync Detect MAIN 383 Counting value of 2ms Sync Detect SUB 384 TB1274 Read Data 00h Main 385 ...

Page 39: ...ECOR0_P4 PAL1 Video 15 1 440 Horizontal Coring Level Enhancer Gain HECOR0_P5 NT2 NT3 NT4 PAL2 PAL3 PAL4 15 0 441 Horizontal Coring Level Enhancer Gain HECOR0_P6 HD2 HD3 HD9 HD10 15 1 442 Horizontal Coring Level Enhancer Gain HECOR0_P7 HD1 HD4 HD5 HD6 HD7 HD8 15 0 443 Horizontal Coring Level Enhancer Gain HECORPC_P1 PC 15 1 444 Horizontal Coring Level Enhancer Gain EU HECORE_P1 PAL1 RF multi 15 1 4...

Page 40: ...ear Peaking for Y G YHNLP0_P0 NTSC PAL multi 63 0 513 YHNLP1_P0 HD 63 0 514 Coring Amplitude for Y G YCOR0_PO NT1 RF PAL1 RF multi 7 7 515 YCOR1_PO NT1 Video PAL1 Video 7 5 516 YCOR2_PO NT2 NT3 NT4 PAL2 PAL3 PAL4 7 3 517 YCOR3_PO HD2 HD3 HD9 HD10 7 1 518 YCOR4_PO HD1 HD4 HD5 HD6 HD7 HD8 7 1 519 Vertical Enhancer Gain for Y G YVEG0_P1 NTSC PAL RF 15 8 520 YVEG1_P1 HD2 HD3 HD9 HD10 15 12 521 YVEG2_P...

Page 41: ...fset Except D Sub Component NT1 2 3 HD2 3 PAL1 2 3 HD9 10 255 128 584 B Y Clamp offset Except D Sub Component HD1 4 HD7 8 255 128 585 R Y Clamp offset Except D Sub Component HD1 4 HD7 8 255 128 586 B Y Clamp offset Except D Sub Component HD5 6 255 128 587 R Y Clamp offset Except D Sub Component HD5 6 255 128 588 B Y Clamp offset D Sub Component NT1 2 3 HD2 3 PAL1 2 3 HD9 10 255 128 589 R Y Clamp o...

Page 42: ... 254 127 651 Color Center CM DVI PC 127 64 652 Color Center CM DVI STB 480i 576i 480p 576p 127 82 653 Color Center CM DVI STB 720p 60 1080i 60 1080i 50 127 82 654 Color Center CM DVI STB VGA 127 82 655 Color Center CM DSUB RGB 127 64 656 Tint Center CM DVI PC 254 128 657 Tint Center CM DVI STB 480i 576i 480p 576p 254 128 658 Tint Center CM DVI STB 720p 60 1080i 60 1080i 50 254 128 659 Tint Center ...

Page 43: ...tural Night mode 2 1 702 Dispersion Time of Sustain current 0 2 Times 1 4 times For PC Movie mode 1 1 703 SMPLING For CCD 255 0 704 POLLING For CCD 255 15 705 START For CCD 7 2 706 TIMEOUT For CCD 30 5 707 STATUS For CCD 7 2 708 CCD HP For CCD 79 40 709 CCD CLK For CCD 79 57 710 Sharpness Gain For Main 480i 576i 15 10 711 Sharpness EQ For Main 480i 576i 3 1 712 Sharpness f0 For Main 480i 576i 3 1 ...

Page 44: ... HD8 Component of 1080i 50 YCBCR HD9 Component of 576p YPBPR HD10 Component of 576p YCBCR HD HD1 10 of Component TV NTSC HD PC PC signal Video Input System Judgment of H Frequency Video Input Setup Mode AV1 AV2 PAL 15 75kHz 576i Auto P AL2 SDTV DVD PAL2 HDTV P AL3 NTSC 15 75kHz 480i Auto NT2 SDTV DVD NT2 HDTV NT3 PAL 31 25kHz 576p Auto HD10 SDTV DVD HD10 HDTV HD9 NTSC 31 50kHz 480p Auto HD3 SDTV D...

Page 45: ...urn Vs ADJ to adjust Vs voltage to be within 0 1V of the value specified in the label on the panel Turn Va ADJ to adjust Va voltage to be within 0 2V of the value specified in the label on the panel Reconfirm that Vs voltage remains within 0 1V of the specified value Readjust if it s outside of the margin Label example LOT N6 Vs 185 0V Va 65 0V Permissive level of voltage in sufficient time of hea...

Page 46: ...tment No 289 AGC adjustment No 291 AGC Input Raise No 289 data value until No 291 data is saturated This point AGC MAX With monitoring No 291 reduce No 289 data value and press OK key at the point when No 291 data comes down No 289 AGC Adjustment AGC Adjustment control No 291 AGC Input AGC Voltage Data Default Settings No 289 50 No 291 AGC Voltage Saturation level Adjustment Procedures Adj point I...

Page 47: ... Push AV2 of remote control 2 Push MULTI PICTURE PinP Button of remote control It become two screens 3 It checks that left hand side of two screens is AV2 4 After push yellow button of remote control and push AV1 of remote control 5 It checks that right hand side of two screens is sub tint adjustment signal The waveform of 1pin Cr output and 5pin Y output of PYS Connector is seen 1pin is connected...

Page 48: ... 576p or 480p format into AV1 input terminal 1 Select AV1 and enter the service adjustment mode the adjustment signal 2 Select No 740 RGB Amp Gain ADJ and press OK button for more than 2 seconds to start the adjustment It will complete the adjustment after the OSD of AUTO MODE disappeared 3 Select No 741 RGB Amp Gain ADJ and press OK button for more than 2 seconds to start the adjustment It will c...

Page 49: ... press OK button for more than 2 seconds to start the adjustment It will complete the adjustment after the OSD of AUTO MODE disappeared Note Never adjust without use of the specified signal If that were done by mistake the picture would become abnormal in black level contrast and color In this case it will be recovered by re adjustment in the specified way The signal level of black area should be ...

Page 50: ...step down the two or one among adjustment No 0 1 2 and adjust the value as shown below At least one of the data should be 224 Specification Video color temperature Cool x 0 268 0 005 y 0 283 0 005 Color temp 12000 K 10MPCD Color temperature should be adjusted under the condition in which the screen is the brightest thus the initial value of adjustment is it s maximum value Only reducing the bright...

Page 51: ...ep down the two or one among adjustment No 3 4 5 and adjust the value as shown below At least one of the data should be 224 Specification Video color temperature Normal x 0 285 0 005 y 0 293 0 005 Color Temp 9300 K 0MPCD Color temperature should be adjusted under the condition in which the screen is the brightest thus the initial value of adjustment is it s maximum value Only reducing the brightne...

Page 52: ...r receiving Video signal step down the two or one among adjustment No 6 7 8 and adjust the value as shown below At least one of the data should be 224 Specification Video color temperature WARM x 0 314 0 005 y 0 327 0 005 Color Temp 6500 K 0MPCD Color temperature should be adjusted under the condition in which the screen is the brightest thus the initial value of adjustment is it s maximum value O...

Page 53: ...r receiving Video signal step down the two or one among adjustment No 9 10 11 and adjust the value as shown below At least one of the data should be 224 Specification Video color temperature B W x 0 335 0 005 y 0 343 0 005 Color Temp 5400 K 0MPCD Color temperature should be adjusted under the condition in which the screen is the brightest thus the initial value of adjustment is it s maximum value ...

Page 54: ...mperature Cool x 0 268 0 005 y 0 283 0 005 Color temp 12000 K 10MPCD Environment 20 lux or less Color temperature should be adjusted under the condition in which the screen is the brightest thus the initial value of adjustment is it s maximum value Only reducing the brightness controls the adjustment thus weaken the brighter color to adjust Color temperature is at Cool mode while the following No ...

Page 55: ...es Power cannot be turned on LED does not light Is the input voltage applied to Power supply unit CN61 AC inlet Power switch AC Fuse F901 T6 3AH 250V Are the voltages applied to CN63 pins and CNPPS pins of Power supply unit CN63 5V CNPPS 30V 3 3V 5V 12V 10V Formatter PWB Power supply unit No Yes FILTER PWB L ch R ch GND Check Speaker terminal and Speaker cord Unlocked Check Locked No sound Are the...

Page 56: ...on the Power supply unit correct Panel Module Panel Module Power supply unit Is the LED red or green orange Picture is not displayed LED is lighting Is Voltage applied to CN63 pin of the Power supply unit Power supply unit Is the voltage of CN68 pin on the Power supply unit 5V Power supply unit Is it the power saving mode Formatter PWB Input signal Cable or Formatter PWB ...

Page 57: ... STB Vcc See NO PICTURE IC201 Q200 PC201 PC202 etc See NO POWER IC001 D005 D006 D007 D008 PC003 etc NG NG OK OK NO Vs Va Vcc open connector CN806 CN807 impedance check Vs LINE impedance check Vs LINE PDP module Vs NG impedance check Va LINE open connector CN807 impedance check Va LINE PDP module Va NG D351 D551 Va no uprise Vs down after up Vs no uprise Va down after up SW ON Q300 I301 D310 PC301 ...

Page 58: ...58 PW1A 7 Block diagram Block diagram 1 ...

Page 59: ...I 6 3 1 1 W J N L O V R E T S A M E C N A L A B S S A B T N O C E L B E R T F F O N O R R U S 2 0 4 C I M A 2 9 1 2 M J N S S A B U R T E T U M A L E R Y 4 0 4 C I B 1 2 0 2 A T L A T I G I D P M A R E W O P V 2 1 3 0 4 I 2 5 0 4 U B T N O C S S A B U R T B W P O I D U A E V I R D E T U M E V I R D Y A L E R F F O D E L A L E R Y E T U M h c L T U O P S h c R T U O P S V 2 1 V 2 1 F F O D E L C T ...

Page 60: ...1 0 D 1 1 0 D 0 1 0 D T201 IC201 Q201 6V 30V 12V Bridge 10V C016 Vcc5 1V 1 0 D0 T301 IC301 Q301 C201 T501 Q501 ect AC det Power go 02 2 IC Power off RL002 PFC 1 0 IC0 Q003 4 005 AC100 V 320V AC200V 70V 3 C A in LV TB S Va 60 Va Vs 80 s V 1 0 C1 CHOP CHOP REG Block diagram 3 POWER BOARD ...

Page 61: ... FCK 1 2 3 4 5 6 7 8 EFG2 ZH 8P EJF6 ZH 8P GND TXD RXD 5V RES MD2 FEW FCK L R MUTE AUDRST SCL 1 2 3 4 5 6 7 8 9 GND GND SPRLY AUDDET SDA EFA1 ZH 10P EAF1 ZH 10P 1 2 3 4 5 6 7 8 9 10 L R MUTE AUDRST SCL GND GND SPRLY AUDDET SDA AUDIO PWB 1 2 3 4 5 6 1 2 AC L NC 3 4 AC N NC NC 5 6 FG CN62 B6P VH PPU1 VH 6P AC L NC AC N NC NC FG FILTER PWB 1 2 LCH LCH EAS1 EH 2P PAS3 EH 2P 1 2 LCH LCH 2 3 RCH RCH EAS...

Page 62: ...62 PW1A 7 3 5 3 5 9 3 2 0 1 0 4 2 4 3 3 9 3 8 3 4 3 1 2 1 4 9 2 6 3 3 2 3 1 1 6 9 ...

Page 63: ... Layer Chassis Boards CMP420V1 and CMP420V2 use parts for 41EDT42 CMP420V1A and CMP420V2A use parts for 41EDT42A 1 3 2 4 6 5 42EDT41A AC Filter PWB Power Unit Video Card Joint PWB Formatter PWB Audio PWB TS05429 TS05263 42EDT41 CS00891 Description TS05423 HA01361 UX23571 TS05428 TS05423 HA01361 UX23571 TS05428 TS05263 ...

Page 64: ...ds 7 9 8 All Models Y Driver Upper PWB Y Drive Lower PWB Y SUS PWB X Drive Left PWB Control LVDS PWB X Drive Right PWB Description Z SUS PWB 10 11 12 13 TS05672 TS05673 TS05679 TS05683 TS05678 TS05682 TS05681 Tact Key PWB SW PWB LED PWB SP L PWB SP R PWB Description Not Shown TS05422 TS05424 TS05425 TS05426 TS05427 All Models ...

Page 65: ... to Y SUS PWB Wire Ass y Y Drive Upper PWB to Y Drive Lower PWB Description Ribbon Cable Control PWB to X Drive Right PWB Wire Ass y X Drive Right to Z SUS PWB short Wire Ass y Control PWB to Y SUS PWB Wire Ass y Control PWB to X Drive Left PWB Wire Ass y Control PWB to X Drive Right PWB Wire Ass y X Drive Right to Z SUS PWB long 1 3 2 4 6 5 7 9 8 All Models Description 44 Circuit Board Part Numbe...

Page 66: ...66 PW1A 10 Basic circuit diagram POWER BOARD Basic circuit diagram 1 ...

Page 67: ...67 PW1A POWER BOARD Basic circuit diagram 2 ...

Page 68: ...68 PW1A POWER BOARD Basic circuit diagram 3 ...

Page 69: ...69 PW1A POWER BOARD Basic circuit diagram 4 POWER BOARD Basic circuit diagram 5 ...

Page 70: ...70 PW1A 11 Printed wiring board diagram POWER BOARD Printed wiring board diagram 1 ...

Page 71: ...71 PW1A POWER BOARD Printed wiring board diagram 2 ...

Page 72: ...72 PW1A POWER BOARD Printed wiring board diagram 3 ...

Page 73: ...73 PW1A 12 Disassembly diagram ...

Page 74: ... 21 TS05443 H CON SET HP8C FORMATTER EFL O O O 22 TS05444 H CON SET HP8C FORMATTER EFK O O O 23 TS05445 H CON SET HP8C FORMATTER EFA O O O 24 TS05446 H CON SET HP8C FORMATTER EFJ O O O 25 TS05447 H CON SET HP8C FORMATTER EFJ O O O 26 TS05448 H CON SET HP8C FORMATTER EFJ O O O 27 TS05449 H CON SET HP8C FORMATTER EFG O O O 28 TS05451 H CON SET HP8C FORMATTER EFG O O O 29 TS05452 H CON SET HP8C FORMA...

Page 75: ...4 PWR CORD SP305X1 8MXIS14 SV O O O 71 TS05495 BATT LR6 SN 2P X WHM 1 O O O 72 TS05496 CARTON CMP420V1 C HP8C J88 FOR US O O 73 TS05538 CARTON 42EDT41 C HP8C J88 FOR US TV SILVER O 74 TS05497 USER S MANUAL U HP8C J88 E F S F O O 75 TS05542 USER S MANUAL U HP8C J88 E F S FOR US TV O 76 TS05498 IMAGE RETENTION NOTE HP8C L007 FOR CARTON O O O 77 TS05499 MODEL LABEL CMP720V1 HP8C L006 O 78 TS05501 MOD...

Page 76: ...8 1 0 0 Black 1 5 9 Blue 2 0 0 Brown 2 0 0 3 5 17 Red 3 0 0 4 5 17 Orange 4 0 0 1 190 7 White 5 54 2 190 7 6 54 3 0 0 1 9 81 Black 4 0 0 2 0 0 5 0 0 3 4 95 6 65 2 4 0 0 7 0 0 5 1 96 8 5 17 6 0 0 1 190 7 White 7 4 34 2 190 7 1 5 89 3 190 7 2 5 89 4 0 0 3 0 0 5 0 0 4 0 0 6 0 0 5 3 29 7 0 0 6 3 29 8 0 0 7 0 0 9 0 0 8 0 0 10 0 0 9 1 79 10 1 79 11 0 0 Joint PWB EJF1 Formatter PWB EFJ1 EJF2 Formatter PW...

Page 77: ...3 4 99 6 12 54 4 4 99 1 3 6 Purple 5 4 99 2 0 0 6 0 0 3 3 6 7 4 99 4 0 0 8 4 99 5 0 0 1 9 81 Black 6 0 0 2 0 0 7 4 85 3 4 95 8 4 85 4 0 0 9 4 85 5 1 96 10 4 85 6 0 0 7 4 34 1 0 0 Gray 2 4 99 3 4 99 4 4 99 5 4 99 6 0 0 7 4 99 8 4 99 1 4 86 Yellow 2 4 86 3 4 86 4 0 0 1 4 86 2 4 21 3 0 0 4 4 03 5 0 0 6 0 0 EFK1 Control Panel EFL1 Front Panel indicators EFJ1 Joint PWB EJF5 EFJ2 Joint PWB EJF6 EFG1 Joi...

Page 78: ...PW1A Power PWB DC Voltages CN805 CN63 CNPPS 78 ...

Page 79: ...PW1A Joint PWB DC Voltages EJF6 EJF5 EJP2 EJP1 EJF1 EJA1 EJF2 79 ...

Page 80: ...PW1A Audio PWB DC Voltages EAJ1 EAF1 EAD1 NOT USED 80 ...

Page 81: ...PW1A Formatter PWB DC Voltages EFJ2 EFJ1 EFG1 EFK1 EFL1 EFA1 EFJ4 EFG2 81 ...

Page 82: ...PW1A YSUS PWB DC Voltages P5 P6 82 ...

Page 83: ...PW1A ZSUS PWB DC Voltages P1 83 ...

Page 84: ...areful handling the speaker systems Since the front side of the speaker systems is fragile please do NOT press hard or subject impacts Caution required Product Components Specifications Speakers x2 Speaker cable with core x2 Cushions 2 Speaker holder x4 Mounting screw x8 Type 2 way 3 speakers Bass Reflex Woofer 80mm cone type x 2 each Tweeter 25mm dome type Impedance 6Ω Max input power 50W RMS inp...

Page 85: ...peaker system and slide the screws downwards Next use the previously removed screws to fasten the speaker holders into the mounting holes in the monitor Tighten the four screws to secure Attach the speaker systems to the monitor 3 4 Attach the connection cables to the speaker system Connect the copper coloured wire to the side Connect the silver coloured wire to the side Speaker terminals Press do...

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Page 89: ...PA 0198 42EDT41A CMP420V1A CMP420V2A ...

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Hitachi 42EDT41A, Service Manual

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