Philips BDL4221V/00 Service Manual Download Page 69 | Manualshive

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69

420WN6 LCD TV

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Summary of Contents for BDL4221V/00

Page 1: ...gram 40 55 Scaler Board C B A 56 57 Power Diagram C B A 58 60 IR Control Diagram C B A 61 62 DSUB Diagram C B A 63 65 Tuner Diagram C B A 66 68 Exploded View 69 Recommended Spare parts list 70 75 Circuit description 76 Repair Tips 77 78 General product specification 79 123 Different Parts List 124 Updated for 420WN6QS 125 126 Revision List 127 REFER TO BACK COVER FOR IMPORTANT SAFETY GUIDELINES CA...

Page 2: ...h the safety symbol on the schematics or exploded views Use of substitute replacement parts which do not have the same specified safety characteristics may create shock fire or other hazards Under no circumstances should the original design be modified or altered without written permission from Philips Philips assumes no liability express or implied arising out of any unauthorized modification of ...

Page 3: ...ode 220W Typ at TV mode Power cord length 1 8M Power cord type European type and UK type Power indicator LED On Blue Sleeping mode Amber Auto power saving 5W 1 3 3 Horizontal scan 30 63KHz 1 3 4 Vertical scan 50 75 Hz 1 3 5 Input signals 1 3 5 1 PC Signal type a Analog Video 15 pin D Sub 0 7 Vp p linear positive polarity and separate Sync TTL level positive or negative polarity b Audio signal Mini...

Page 4: ...pp C 300 mV pp Impedance 75ohm Audio L R input share with Composite Audio input Nominal 0 5 V rms Maximum 1 5 V rms Impedance 10 kohm Note the input will be overloaded when the signal 1 5 V rms 4 CVBS input with RCA Jack Video Audio input Specification Video CVBS Source signal 1 Vpp Impedance 75ohm Audio L R input share with S Video Audio input Nominal 0 5 V rms Maximum 1 5 V rms Impedance 10 kohm...

Page 5: ...r TV tuner input available in TV version only Rear View 1 AC in AC power in 2 AC power AC power switch 3 Speakers output External speakers output 4 D Sub output PC analog D Sub output 5 DVI D input PC digital input 6 D Sub input PC analog D Sub input 7 RS232 input RS232 network connection Input 8 RS232 output RS232 network connection output for the use of loop through function 9 PC audio PC stereo...

Page 6: ...ct the cables to the back of your computer by following step 1 5 l If your monitor displays the computer image the installation has been completed successfully l If installation was not successful see the Troubleshooting section l For installation of the monitor driver for Microsoft Windows see the Monitor Driver Installation section Getting Started Connect to DVD VCD VCR Connect to DVD VCR VCD th...

Page 7: ...7 Installation 420WN6 LCD TV Go to cover page Connecting to Cable TV Antenna Progressive video and HDTV connections for digital high definition picture ...

Page 8: ...reen Yellow Green Blue Cyan Light Blue Three adjacent lit sub Pixels one white pixel A red or blue bright dot must be more than 50 percent brighter than neighboring dots while a green bright dot is 30 percent brighter than neighboring dots Black Dot Defects Black dot defects appear as pixels or sub pixels that are always dark or off That is a dark dot is a sub pixel that stands out on the screen w...

Page 9: ...p YES p TV q NO AV MANUAL ADJUST S VIDEO PHASE q EXT CLOCK AUDIO HORIZON TAL p PC VERTICA L q PIP DISPLAY AUDIO p ICON1 SMART SOUND ICON2 p MUSIC SOURCE ICON3 THEATRE p PC q ICON4 NEWS DVI q PERSONA L TV SETTINGS AV TREBLE S VIDEO BASS HD BALANCE q EXT VIRTUAL SURROUND ZOOM p ON ZOOM ID q OFF ZOOM TYPE AVL p OFF p YES 4X4 q NO INSTALL 3X3 LANGUAGE 2X2 p ENGLISH q 1X5 DEUTSCH FRANÇAIS 1 pc signal c...

Page 10: ...WS q OFF q PERSONAL FACTORY RESET SETTINGS p NO TREBLE q YES BASS BALANCE SETUP VIRTUAL SURROUND AUTO PROGRAM p ON START q OFF MANUAL STORE AVL SYSTEM p YES p FRANCE FEATURES q NO q WEST EUROPE SOURCE p PC MANUAL STORE DVI HDCP PROGRAM NUMBER TV FINE TUNE AV STORE S VIDEO YES HD STORE q EXT p YES q NO PICTURE FORMAT CHANNEL SETTING p AUTOMATIC CHANNEL EDIT 4 3 CHANNEL ZOOM 16 9 SKIP WIDESCREEN p A...

Page 11: ...GS RATING TREBLE BLOCK OPTION BASS p ON BALANCE q OFF VIRTUAL SURROUND p ON MOVIE RATING q OFF G p ON AVL p YES q OFF q NO PG FEATURES p PC PG13 SOURCE DVI HDCP R TV NC17 AV X S VIDEO HD TV RATING q EXT TV Y TV Y7 PICTURE FORMAT p AUTOMATIC BLOCK 4 3 FV ZOOM 16 9 TV G WIDESCREEN TV PG q SUPER WIDE BLOCK PICTURE ALIGNMENT V AUTO LOCK S LOCK PROGRAM L CHANGE CODE D YES TV 14 CLEAR ALL BLOCK p ON V Z...

Page 12: ...G screen then release all buttons Bring up OSD Lock OSD function can be locked by Pressing Menu button for more than 10 seconds while there is video signal in The screen automatically shows OSD MAIN MENU LOCKED for 3 seconds When users press Menu button OSD Lock MENU will appear and the default cursor location will be on unlock OSD can be unlocked by Pressing front panel Menu button for more than ...

Page 13: ...ription Scalar Gain R G B Scalar Gain for Normal Warm Cool in PC mode Auto Color Adjust color from received signal either in PC or HDTV mode ADC Offset R G B Adjust AD 9883 for PC ADC offset ADC Gain R G B Adjust AD 9883 for PC ADC gain PC Offset R G B PC analog scalar offset 711X SDTV Brightness Adjust SA 7119 SDTV brightness 711X SDTV SAT Adjust SA 7119 SDTV saturation 711X SDTV Contrast Adjust ...

Page 14: ... timing is out of range it shows OUT OF RANGE warning message on the center of the screen The range of horizontal frequency is between 14 63 KHz The range of vertical frequency is between 45 76 Hz The OSD won t timeout 3 NO VIDEO INPUT When PC input timing has either horizontal frequency or vertical frequency Or neither has horizontal frequency nor vertical frequency It shows on the center of the ...

Page 15: ...via Menu Factory Reset All Settings Lower video resolution or increase font size Shaky Jittery Video Wavy picture or fine movement Auto adjust image through Menu Image Setting Auto Adjust Adjust Phase and Clock controls via OSD Perform the LCD Monitor TV factory reset via Menu Factory Reset All Settings Check environmental factors Relocate and test in other room Missing Pixels LCD screen has spots...

Page 16: ...on Adjust Phase and Clock controls via OSD Check for bent or broken pins Boot up in the safe mode LCD Scratched Screen has scratches or smudges Turn the LCD Monitor TV off and clean the screen Safety Related Issues Visible signs of smoke or sparks Do not perform any troubleshooting steps The LCD Monitor TV needs to be replaced Intermittent Problems The LCD Monitor TV malfunctions on off Ensure the...

Page 17: ...he video cable to video output port behind the LCD monitor TV Low Quality DVD playback Picture not crisp and some color distortion Check DVD connection Composite gives good picture S Video gives better picture Component gives best picture No sound See video but no audio Check if the LCD Monitor TV volume is turn off of muted Connect the audio cable securely Audio cable is connected incorrectly Ver...

Page 18: ...es Foreign material inside polarizer It shows liner or dot shape Concentric circle formed Bottom back light of LCD is brighter than normal Back light un uniformity Backlight has foreign material Black or white color liner or circular type Quick reference for failure mode of LCD panel this page presents problems that could be made by LCD panel It is not necessary to repair circuit board Simply foll...

Page 19: ... set at 100 uA 5 mA 0 09 Rohm current for Max R is the Tester limitation set resistance of at 0 1 uA for the mains cord Min Limitation Ramp set at 2 time seconds Tester Test method Condition HiPot Test for HiPot Test for Ground Continuity products where products where Test requirement the mains input the mains input is range is Full 110V AC USA range or 220V type AC 2 2 1 The minimum test duration...

Page 20: ...nscrew all the screws rise the back cover slowly and carefully then you will see the following picture you should disconnect all the connector carefully and the remove the back cover Remove the scaler board and power board and TV BOX Unscrew all the screws and disconnect the connectors on the power board and unscrew the screws on the side as shown in following ...

Page 21: ...er board Remove the scaler board unscrew all the screws on the scaler board and on the side disconnect the connectors then remove the scaler board and the TV BOX After you remove the TV BOX then unscrew the screws Unscrew the screws and open the click to remove the control board ...

Page 22: ...ce with 4 channels TMDS signal Audio signal Audio 1 R L for AV IN AV and S Video Level Nominal 0 5 V rms Maximum 1 5 V rms Impedance 10 kohm Audio 2 R L for SCART IN Level Nominal 0 5 V rms Maximum 1 5 V rms Impedance 10 k ohm Audio 3 R L for HD Video IN Level Nominal 0 5 V rms Maximum 1 5 V rms Impedance 10 k ohm 2 1 3 CVBS output Video CVBS output 1Vpp Impedance 75ohm Audio R L output from CVBS ...

Page 23: ...z PAL I UK Checkerboard 25 K21 471 25 MHz 477 75 MHz SEC K1 CCIR Crosshatch 28 G28 527 25MHz 532 75MHz PAL G UK Color Bar Table 2 3 2 2 3 3 Table 2 3 3 for AP Multi model Signal Distribution Table PAL and NTSC Frequency Carriers PRG CH Video Sound TV System Pattern 0 1 AU37 590 25MHz 595 75MHz PAL B UK Pure White 2 AU2 64 25MHz 69 75MHz PAL B UK Circle Pattern 3 E7 189 25MHz 194 75MHz PAL B CCIR C...

Page 24: ...8 pixels 10 222 us Period 864 pixels 42 000 us 858 pixels 31 746 us 864 pixels 64 00 us 858 pixels 63 556 us Pulse delay 12 pixels 0 444 us 16 pixels 0 592 us 12 pixels 0 889 us 19 pixels 1 407 us Pulse width 64 pixels 2 370 us 62 pixels 2 294 us 63 pixels 4 667 us 62 pixels 4 593 us Vertical Frequen cy 50 Hz 60 Hz 50 Hz 59 94 Hz Active 576 lines 18 442 ms 480 lines 15 238 ms 576 lines 36 864 ms 4...

Page 25: ...nput Alignment method Initial Set up 1 Set 711X SDTV Brightness 135 Sat 64 Contrast 50 in Factory mode can be fine tuned 2 Set Smart picture as Personal 3 Apply 100 Full White pattern by TV pattern generator Alignment Set the VIDEO SCALER GAIN R G B SCALER GAIN R G B in Factory Mode See Fig 2 Enter factory menu press VOL and VOL keys together around six seconds or use factory command by Industrial...

Page 26: ...tive this function then scaler will adjust RGB and Color RGB automatically by it self Fig 2 Fig 3 2 Apply a 1024x768 60Hz signal with white pattern Set brightness control at 50 and contrast control at 50 Adjust the R G B gain to reach special color temperature on center of screen 2 1 Aim the probe CA A30 at the center of screen as Fig 4 2 2 Remove the lens protective cover of probe CA A30 2 3 Set ...

Page 27: ...Check X Y co ordinates as below Reading with Minolta CA 110 2 Check the gray level color poor noise condition and chromaticity Note 1 Use Minolta CA 110 for color coordinates and luminance check 2 Set Light Senor off before W D adjustment 3 Luminance 400 cd m2 in the center of the screen at 6500 NORAML color and PC Brightness control Contrast control at 100 4 Set smart picture at normal brightness...

Page 28: ...m Windows 95 98 Y o Install the EDID_PORT_Tool under Win2000 XP As Fig 1 A Cody the UserPort sys to C WINNT system32 drivers win2000 C WINDOWS system32 drivers winXP B Running io exe everytime Before you start to programming edid data 4 A D Alignment kits 3138 106 10396 inclusion a Alignment box x1 as Fig 2 b Printer cable x1 c D Sub to D Sub cable x1 System and equipment requirements ou have t 3 ...

Page 29: ...ollowing error message as shown in Fig 8 before entering the main menu Meanwhile the read EDID function will be disable At this time please make sure all cables are connected correctly and 1 Fig 9 4 Click button The main menu appears as shown in Fig 7 OK This is for initialize alignment box Fig 7 Fig 6 3 At the submenu type the letter of your computer s hard disk drive followed by EDID45 for examp...

Page 30: ...in Fig 14 EDID45 DDC application provides the function selection and text change select fill out from Step 1 to Step 9 Step 4 Modify DDC data Monitor Serial No Next 1 Click bring up Fig 15 2 Click bring up Fig 16 Next 3 Click OK button to confirm your selection 4 Click icon Read EDID function to read DDC EDID data from monitor The EDID codes will display on screen as shown in Fig 13 Fig 15 Fig 16 ...

Page 31: ...21 Fig 18 Fig 19 3 Click bring up Fig 17 Next 7 Click bring up Fig 21 Next 4 Click bring up Fig 18 Next 5 Click bring up Fig 19 Next Fig 22 6 Click bring up Fig 20 Next Serial number can be filled up or be changed at this moment Fig 20 8 Click bring up Fig 20 Next ...

Page 32: ...oad it into DDC IC for DDC Data application 2 Click Save Step 7 Exit DDC program Pull down the File menu and select Exit as shown in Fig 25 Step 5 Write DDC data 1 Configuration should be as Fig 23 And press OK 3 Click Write EDID icon from the tool bar to write DDC data Bring up Writing 0 100 ready a progressing bar on the left down corner 4 Turn off on monitor Fig 23 Fig 25 Fig 24 150S5 DDC C My ...

Page 33: ...ion selection and text change select fill out from Step 1 to Step 9 Step 4 Modify DDC data Monitor Serial No Next 1 Click bring up Fig 30 Then select Digital Signal as below 3 Click OK button to confirm your selection 4 Click icon Read EDID function to read DDC EDID data from monitor The EDID codes will display on screen as shown in Fig 28 Fig 30 Fig 31 2 Select the DDC2Bi as the communication cha...

Page 34: ...le ddc which can be open in WordPad By using WordPad the texts of DDC data table 128 bytes hex code can be modified If DDC TEXTS HEX Table are completely correct it can be saved as ddc flie to re load it into DDC IC for DDC Data application 2 Click Save Step 7 Exit DDC program Pull down the File menu and select Exit as shown in Fig 34 Step 5 Write DDC data 1 Configuration should be as Fig 32 And p...

Page 35: ... 523 H Border pixels 0 V Border lines 0 Flags Non interlaced Normal Display No stereo Digital Separate sync Positive Vertical Sync Positive Horizontal Sync Detailed Timing 2 Pixel Clock MHz 84 75 H Active pixels 1360 H Blanking pixels 416 V Active lines 768 V Blanking lines 30 H Sync Offset F Porch pixels 72 H Sync Pulse Width pixels 136 V Sync Offset F Porch lines 3 V Sync Pulse Width lines 5 H I...

Page 36: ... Display No stereo Digital Separate sync Positive Vertical Sync Positive Horizontal Sync Detailed Timing 2 Pixel Clock MHz 84 75 H Active pixels 1360 H Blanking pixels 416 V Active lines 768 V Blanking lines 30 H Sync Offset F Porch pixels 72 H Sync Pulse Width pixels 136 V Sync Offset F Porch lines 3 V Sync Pulse Width lines 5 H Image Size mm 930 V Image Size mm 523 H Border pixels 0 V Border lin...

Page 37: ...Port of PC and 15 pin D SUB connector of Monitor It is a windows based program which cannot be run in MS DOS System and equipment requirements 1 An i486 or above personal computer or compatible 2 Microsoft operation system Windows 95 98 2000 XP 4 ISP as shown in Fig 1 3 ISP Software Easywrite TOOL 3138 106 10079 5 Connect and Mains cord to Monitor as shown in Fig 2 ISP TOOL Fig 1 Fig 4 Fig 5 Fig 6...

Page 38: ...o cover page If there is a warring message coming as shown in Fig 10 you have to check the AC power Video cable or Novatek MCU Press the file exit to end program as shown in Fig 9 Fig 9 You can enter factory mode to confirm the CPU version ...

Page 39: ...39 420WN6 LCD TV Go to cover page BLOCK DIAGRAM Main Board ...

Page 40: ...Go to cover page ...

Page 41: ...41 420WN6 LCD TV Go to cover page SCALER DIAGRAM ...

Page 42: ...Go to cover page ...

Page 43: ...43 420WN6 LCD TV Go to cover page SCALER DIAGRAM ...

Page 44: ...Go to cover page 420WN6 LCD TV 44 SCALER DIAGRAM ...

Page 45: ...45 420WN6 LCD TV Go to cover page SCALER DIAGRAM ...

Page 46: ...Go to cover page 420WN6 LCD TV 46 SCALER DIAGRAM ...

Page 47: ...47 420WN6 LCD TV Go to cover page SCALER DIAGRAM ...

Page 48: ...Go to cover page 420WN6 LCD TV 48 SCALER DIAGRAM ...

Page 49: ...49 420WN6 LCD TV Go to cover page SCALER DIAGRAM ...

Page 50: ...Go to cover page 420WN6 LCD TV 50 SCALER DIAGRAM ...

Page 51: ...51 420WN6 LCD TV Go to cover page SCALER DIAGRAM ...

Page 52: ...Go to cover page 420WN6 LCD TV 52 SCALER DIAGRAM ...

Page 53: ...53 420WN6 LCD TV Go to cover page SCALER DIAGRAM ...

Page 54: ...Go to cover page ...

Page 55: ...55 420WN6 LCD TV Go to cover page SCALER DIAGRAM ...

Page 56: ...Go to cover page 420WN6 LCD TV 56 SCALER BOARD C B A ...

Page 57: ...57 420WN6 LCD TV Go to cover page SCALER BOARD C B A ...

Page 58: ...Go to cover page ...

Page 59: ...59 420WN6 LCD TV Go to cover page POWER BOARD C B A ...

Page 60: ...Go to cover page ...

Page 61: ...61 420WN6 LCD TV Go to cover page IR CONTROL DIAGRAM ...

Page 62: ...Go to cover page 420WN6 LCD TV 62 IR CONTROL BOARD C B A ...

Page 63: ...63 420WN6 LCD TV DSUB DIAGRAM Go to cover page ...

Page 64: ...DSUB C B A 64 420WN6 LCD TV Go to cover page ...

Page 65: ...65 420WN6 LCD TV DSUB C B A Go to cover page ...

Page 66: ...TUNER DIAGRAM FOR 420WN6QS 93 AND 420WN6QS 97 66 420WN6 LCD TV Go to cover page ...

Page 67: ...67 420WN6 LCD TV Go to cover page TUNER C B A FOR 420WN6QS 93 AND 420WN6QS 97 ...

Page 68: ...TUNER C B A FOR 420WN6QS 93 AND 420WN6QS 97 68 420WN6 LCD TV Go to cover page ...

Page 69: ...9876131 CBLE 486 2 160 3 963 AWG22 1191 313815137351 POWER SHIELD 92 313815862281 SCALER PCB ASSY WE 1051 313815137401 TV COVER NT 91 313815759842 BACK COVER ASSY 40 313815862301 DSUB ADAPOTOR PCB ASSY 1053 823827718511 SPEAKER CABLE 4P L R 1192 313815863541 CONTROL PCB ASSY 1055 313815759851 BASE ASSY 70 313815759851 BASE ASSY 70 313819876131 CBLE 486 2 160 3 963 AWG22 1191 313815861181 POWER PCB...

Page 70: ...0118 IC SM 74HC573PW PHSE R 7165 933828890215 TRA SIG SM PMBT2369 PHSE R 7166 935187000118 IC SM 74HC573PW PHSE R 7201 935245720165 IC SM 74HCT1G14GW PHSE R 7202 932214526668 IC SM M24C02 WMN6 ST00 R 7301 932214526668 IC SM M24C02 WMN6 ST00 R 7401 932222077668 IC SM AME1117ECGTZ AME0 R 7402 932222076668 IC SM AME1117CCGTZ AME0 R 7403 932222593671 IC SM MST5151A LF MSTA Y 7404 932222075668 IC SM AM...

Page 71: ...020 R 2116 223824619863 CER2 0603 Y5V 10V 1U P8020 R 2117 223824619863 CER2 0603 Y5V 10V 1U P8020 R 2118 223824619863 CER2 0603 Y5V 10V 1U P8020 R 2119 223824619863 CER2 0603 Y5V 10V 1U P8020 R 2121 223824619863 CER2 0603 Y5V 10V 1U P8020 R 2122 223824619863 CER2 0603 Y5V 10V 1U P8020 R 2123 222258015649 CER2 0805 X7R 50V 100N PM10 R 2124 222258015649 CER2 0805 X7R 50V 100N PM10 R 2125 22382461565...

Page 72: ... X7R 50V 10N PM10 R 2865 223878615649 CER2 0603 X7R 16V 100N PM10 R 2866 223886715101 CER1 0603 NP0 50V 100P PM5 R 2867 223886715101 CER1 0603 NP0 50V 100P PM5 R 2868 223858615636 CER2 0603 X7R 50V 10N PM10 R 2869 223858015636 CER2 0805 X7R 50V 10N PM10 R 2871 223858615636 CER2 0603 X7R 50V 10N PM10 R 2872 223858615636 CER2 0603 X7R 50V 10N PM10 R 2873 202002191726 ELCAP SM RVS 16V 47U PM20 R 2901...

Page 73: ...751 232270260101 RST SM 0603 RC21 100R PM5 R 3752 232270260472 RST SM 0603 RC21 4K7 PM5 R 3753 232270260472 RST SM 0603 RC21 4K7 PM5 R 3754 232270260472 RST SM 0603 RC21 4K7 PM5 R 3755 232270260101 RST SM 0603 RC21 100R PM5 R 3756 232270260101 RST SM 0603 RC21 100R PM5 R 3757 235003510101 RST NETW SM ARV24 4X100R PM5 R 3758 235003510101 RST NETW SM ARV24 4X100R PM5 R 3781 232270260472 RST SM 0603 ...

Page 74: ...50V S 2U2 PM5 B 2057 823827718501 1 5MF 450V MPP 2062 202203100427 ELCAP HS 450V S 220U PM20 B 2063 202055790152 CER2 DC B 500V S 1N5 PM10 A 2064 242254900673 SURGE PROTECT SPG 201M A A 2066 203801750215 ELCAP REA 16V S 10U PM20 A 2067 202203100273 ELCAP PF 25V S 100U PM20 A 2068 202203100273 ELCAP PF 25V S 100U PM20 A 2069 242254900673 SURGE PROTECT SPG 201M A A 2070 242254900673 SURGE PROTECT SP...

Page 75: ...M10 R 1053 313815862301 DSUB ADAPOTOR PCB ASSY 1698 242202518822 CON V 9P M 2 00 63389 B 1699 242202518954 SOC SUBD H 9P F BK 1211 B 2699 222224119876 CER2 1206 Y5V 10V 10U P8020 R 1055 313815863541 CONTROL PCB ASSY 1086 242202518816 CON V 4P M 2 00 63384 B 1087 242212803035 SWI TACT SM 1P 1POS SKQGAB R 1088 242212803035 SWI TACT SM 1P 1POS SKQGAB R 1089 242212803035 SWI TACT SM 1P 1POS SKQGAB R 1...

Page 76: ...s used for back light control RC receiver keypad input I O switch control IIC communication and TV tuning control MSP3450G sound decoder control SAA7119 video decoder control Columbus IC 3D comb filter control and Audio AMP TPA3008D2 control Video decoder SAA7119 is used for TV video processing and convert it with CCIR 656 8bits digital format and send to Columbus IC for 3D comb filter processing ...

Page 77: ...emoved with a solder sucker see Fig 1A While holding the SMD with a pair of tweezers take it off gently using the soldering iron s heat applied to each terminal see Fig 1 B Remove the excess solder on the solder lands by means of litz wire or a solder sucker see Fig 1C 1 3 Caution on removal When handling the soldering iron use suitable pressure and be careful When removing the chip do not use und...

Page 78: ...e hours around 90 for drying Take attention for ESD protection 5 Rework on BGA Ball Grid Array ICs General Although LF BGA assembly yields are very high there may still be a requirement for component rework By rework we mean the process of removing the component from the PWB and replacing it with a new component If an LF BGA is removed from a PWB the solder balls of the component are deformed dras...

Page 79: ...Tuner S Video RCA AV input output interface with R L Audio in SCART interface DVI digital interface with HDCP support for TV and PC HD Component YPbPr with L R audio input RCA connector NTSC PAL SECAM TV color system PC graphic auto picture adjustment 14 user modes User friendly OSD menu User friendly remote controller Recommend resolution 1366 x 768 non interlace at 60 Hz WXGA 42 color TFT LCD fl...

Page 80: ...e signals cables 3 2 User interface 3 2 1 Front and rear control panel 3 2 2 Front and rear control panel definition 3 2 3 Remote control 3 2 4 OSD Menu 3 2 5 RS232 control 3 3 PC TV requirement 3 3 1 PC interface 3 3 1 1 Mode storing capacity 3 3 1 2 Horizontal scanning 3 3 1 3 Vertical scanning 3 3 1 4 Input connectors 3 3 1 5 Available timings 3 3 2 I O interface 3 3 3 TV interface 3 3 3 1 TV T...

Page 81: ...tual display size 4 5 Brightness uniformity 4 6 PC white color adjustment 4 7 TV white color adjustment 4 8 TV picture centering 4 9 HD support timing 4 9 1 HD detail timing 5 0 Mechanical characteristics 5 1 Controls 5 2 Unit dimension weight 5 3 Tilt and swivel base 5 4 Transportation packages 5 4 1 Shipping dimension weight 5 4 2 Block unit palletization 6 0 Environmental characteristics 6 1 Su...

Page 82: ...TV 10 0 Appendices Fig 1 Pattern 1 Brightness and Uniformity Pattern 2 Cross talk pattern Gray leave 184 256 gray level Pattern 3 Cross talk pattern Center gray level 0 Black Table 1 WE model West Europe TV Preload channels Table 2 NAFTA model US Air broadcast channels US Cable channels Table 3 AP model AP multi TV preload channels Table 4 China model China TV preload channels ...

Page 83: ...GB vertical stripe Display operating mode Normally black Color depth 16 777 216 colors 8 bits Brightness cd m 2 500 Center 1 points Typ Viewing angle CR 10 Viewing angle free R L 178 Typ U D 178 Typ Surface treatment Hard coating 3H Anti glare treatment of the front polarize Electrical interface LVDS Response Time ms Typ TrR 8 TrD 10 Gray to Gray Contrast ratio Typical 1100 1 with AI Typical 550 1...

Page 84: ...input TV DVI D Digital interface Support HDCP share with PC audio input Tuner Aerial input HD Component YPbPr input and audio input with RCA jack Composite video input and S Video input share with the same audio Scart connector support RGB S video CVBS input and tuner CVBS output PVR output Composite Video and Audio output Headphone output 2 10 Ambient temperat 0 40 C 2 11 Regulatory compliance Sa...

Page 85: ...l characteristics 3 1 Interface signals cables VGA Interface Cable Length 1 8 M 50 mm DVI D Cable Length 1 8 M 50 mm Stereo RCA R L audio cable option Length 1 5 M 50 mm S video cable option Length 1 5 M 50 mm AV cable option Length 1 5M 50 mm SCART cable option Length 1 5 M 50 mm Mini Jack stereo cable option Length 1 5 M 50 mm YPbPr cable option Length 1 5M 50mm Power cord Length 1 8 M 50 mm ...

Page 86: ...nàBlue Standby modeàAmber IR receiver Sense the signal from RC handset Light Sensor It will set the LCD back light brightness automatically according to the ambient light Rear Input select Input source select key PC à DVIà HDCP à TVàAVà S VIDEO àEXTàHD and PC again Up Down Channel up and down and OSD cursor up and down Left Right Volume up and down and OSD cursor left and right OSD Enable OSD menu...

Page 87: ...t TV menu function III Recalling from saving mode In Monitor power saving mode which no H V sync or no either H sync or V sync input via VGA connector The monitor will enter Monitor saving mode The way to wake up Monitor 1 when PC H sync and V sync have signal again then Monitor will wake up 2 press Source key on remote controlà change to Video source directly In TV power saving mode which switche...

Page 88: ...D and adjustment CH CH 15 Freeze picture Freeze picture function 16 I II 2nd audio Sound select 17 Status OSD Display OSD status 18 PIP size PIP size selection 19 PIP position PIP position hot key 20 Sound mute function 1 Power Power On Standby key 2 Sleep timer 15 30 60 120 180 240 OFF 3 Display Format Picture format with Wide screen 4 3 Zoom 16 9 Supper Wide 4 AV Source selection 5 Numerica keys...

Page 89: ... MEDIUM AUTO ADJUST LARGE YES q PBP STORE VIDEO p YES p TV q NO AV MANUAL ADJUST S VIDEO PHASE q EXT CLOCK AUDIO HORIZONTAL p PC VERTICAL q PIP DISPLAY AUDIO p ICON1 SMART SOUND ICON2 p MUSIC SOURCE ICON3 THEATRE p PC q ICON4 NEWS DVI q PERSONAL TV SETTINGS AV TREBLE S VIDEO BASS HD BALANCE q EXT VIRTUAL SURROUND ZOOM p ON ZOOM ID q OFF ZOOM TYPE AVL p OFF p YES 4X4 q NO INSTALL 3X3 LANGUAGE 2X2 p...

Page 90: ... AUDIO p ON SMART SOUND q OFF p MUSIC REMOTE CONTROL THEATRE p ON NEWS q OFF q PERSONAL FACTORY RESET SETTINGS p NO TREBLE q YES BASS BALANCE SETUP VIRTUAL SURROUND AUTO PROGRAM p ON START q OFF MANUAL STORE AVL SYSTEM p YES p FRANCE FEATURES q NO q WEST EUROPE SOURCE p PC MANUAL STORE DVI HDCP PROGRAM NUMBER TV FINE TUNE AV STORE S VIDEO YES HD STORE q EXT p YES q NO PICTURE FORMAT CHANNEL SETTIN...

Page 91: ...ND p MUSIC SKIP THEATRE p ACTIVATE NEWS q SKIP q PERSONAL MANUAL FINE TUNE SETTINGS RATING TREBLE BLOCK OPTION BASS p ON BALANCE q OFF VIRTUAL SURROUND p ON MOVIE RATING q OFF G p ON AVL p YES q OFF q NO PG FEATURES PG13 SOURCE p PC R DVI HDCP NC17 TV X AV S VIDEO TV RATING HD TV Y q EXT TV Y7 PICTURE FORMAT p AUTOMATIC BLOCK 4 3 FV ZOOM 16 9 TV G WIDESCREEN TV PG q SUPER WIDE BLOCK PICTURE ALIGNM...

Page 92: ...s no video signal in The Attention signal Attention signals on or Attention signal off appears for 3 seconds 3 2 4 4 OSD Lock OSD function can be locked by Pressing Menu button for more than 10 seconds while there is video signal in The screen automatically shows OSD MAIN MENU LOCKED for 3 seconds When users press Menu button OSD Lock MENU will appear and the default cursor location will be on unl...

Page 93: ...onds while is no video signal in 3 2 5 RS232 Control 9 pin D Sub connector for RS232 interface with pin assignment as follows The communication protocol divided into 5 groups The simulation test program Can select necessary items to assure RS232 port function well Group 1 Geometry Group HORIZONTAL POSITION VERTICAL POSITION SCREEN MODE VIDEO MODE PIP SIZE PIP POSITION Group 2 Miscellaneous Group S...

Page 94: ...OR SHARPNESS TINT COLOR TEMPERATURE INPUT SELECT PIP VIDEO SOURCE Group 4 Audio Group SMART SOUND TREBLE BASS BALANCE VOLUME SURROUND MUTE Group 5 Debug Group 3 3 PC and TV requirement 3 3 1 PC interface 3 3 1 1 Mode storing capacity Pre set 12 User modes 12 New modes 8 3 3 1 2 Horizontal scanning Sync polarity Positive or Negative Scanning frequency 30 63 KHz 3 3 1 3 Vertical scanning Sync polari...

Page 95: ...ssignment 1 8m 15Pins D sub male with DDC2B Pin assignments B Output analog D sub connector pin assignment PIN No SIGNAL PC 1 Red 2 Green 3 Blue 4 GND 5 GND 6 Red GND 7 Green GND 8 Blue GND 9 5V Supply from PC 10 Sync GND 11 GND 12 Bi directional data 13 H sync 14 V sync 15 Data clock PIN No SIGNAL 1 Red_OUT 2 Green_OUT 3 Blue_OUT 4 GND 5 GND 6 Red GND 7 Green GND 8 Blue GND 9 GND 10 Sync GND 11 G...

Page 96: ... 8639 000 16494 2005 06 10 2005 06 10 590 18 45 Freud Yu 96 420WN6 LCD TV C DVI D Pin assignment for PC DVI and Video HDCP Pin No Description 1 RX2 2 RX2 3 GND 4 GND 5 GND 6 DDC clock 7 DDC data 8 GND 9 RX1 10 RX1 11 GND 12 GND 13 GND 14 5V 15 GND 16 5V 17 RX0 18 RX0 19 GND 20 GND 21 GND 22 GND 23 RXC 24 RXC ...

Page 97: ... 806 lines P ms 0 057 2 lines 0 106 4 lines 0 064 3 lines 0 124 6 lines Q ms 0 626 22 lines 0 607 23 lines 0 448 21 lines 0 600 29 lines R ms 17 07 600 lines 15 84 600 lines 12 80 600lines 15 880 768 lines S ms 0 028 1 lines 0 026 1 line 0 021 1 line 0 062 3 lines SYNC H V POLARITY SEP SYNC Y Y Y Y MODE NO 1 2 3 4 RESOLUTION 640 x 350 640 x 480 640 x 480 720 x 400 Dot clock MHz 25 175 25 175 31 50...

Page 98: ... 5 lines 0 1455 7 lines 0 105 5 lines Q ms 0 466 28 lines 0 4477 20 lines 0 4186 20 lines 0 461 22 lines R ms 12 795 768 lines 16 082 720 lines 16 075 768 lines 16 094 768 lines S ms 0 017 1 line 0 067 3 lines 0 0628 3 lines 0 063 3 lines SYNC H V POLARITY SEP SYNC Y Y Y Y A H Total O V Total B H Sync width P V Sync width C H Back porch Q V Back porch D H Video width R V Video length E H Front por...

Page 99: ... 16494 2005 06 10 2005 06 10 45 Freud Yu 42 BDS WXGA TFT LCD Monitor TV Location Rear down side DVI in HDCP VGA out VGA audio in VGA in RS232 out RS232 IN AV Audio L R output HD Audio L R in EXT Speaker connector AC Inlet AC Switch Rear left Side TUNER Box Headphone out S video in AV in S Video AV audio L R in ...

Page 100: ...U WE version NAFTA version AP version China version Closed caption N Y N N V chip N Y N N Teletext Y N Y N Remote controller RC5 WE version NAFTA version WE version WE version Channel number 100 US Air 68 cable 125 100 100 Following table is the detail TV System list TV system Position of sound carrier MHz Sound system Color system Country 4 5 4 724212 FM Stereo A2 NTSC Korea 4 5 FM FM EIA J NTSC ...

Page 101: ...Music Theater Sound mute When no video recognition on terrestrial tuner signal the sound must be muted 3 3 3 5 TV special setting Teletext For WE Tuner CVBS input source only TXT on off Enlarge Hold Reveal Mix Quick search from color keys Close Caption V chip For NAFTA Tuner CVBS input source only CC 1 CC 4 CC_MUTE decoding and display TXT1 TXT4 Text mode support violence rating and checking V chi...

Page 102: ...e RF signal Aerial input 10mV 80dBuV HD Component Y Pb Pr Video input Audio input Location Rear down side Specification Video Y 700mV Pb Pr 350mV Impedance 75ohm Audio L R input Nominal 0 5 V rms Maximum 1 5 V rms Impedance 10 k Note the input will be overloaded when the signal 1 5 V rms Connector type RCA Jack ESD protected 15 kV S Video Video input Audio input Location side Specification Video Y...

Page 103: ... down side Specification CVBS Video Audio signals input and output FULL SCART according EN50049 1A3 The sound output signal on the connector must be muted in case of no terrestrial video input Connector type 21 pin black Euro connector ESD protected 15KV SCART Pin assignment for WE model only PIN No SIGNAL 1 Audio output B right 2 Audio input B right 3 Audio output A left 4 Ground audio 5 Ground b...

Page 104: ...ere is no video signal input while PIP on 3 3 5 2 Display size There are 4 different size of PIP Small medium large and PBP Press PIP key to start up the picture in picture display in small size They will be operated in a carousel sequence PIP OFF PIP small PIP medium PIP large PBP PIP OFF 3 3 5 3 Display location The location of PIP should be adjustable and be at the four corners of the monitor P...

Page 105: ...h off 1 W 1 W TV mode The power consumption and the status indication of the set with power management function are as follows Power Spec STATUS 120VAC 230VAC LED On Typical 220W BLUE Stand by 5 W 5 W Amber DC Power switch off 3 W 3 W AC Power switch off 1 W 1 W In Monitor power saving mode Which no H V sync or absent either H sync or V sync input via VGA connector The monitor will enter Monitor s...

Page 106: ...te signal 3 Warm up more than 30 minutes after power on with signal supplied 4 Ambient light 400 600 lux 5 Ambient temperature 25 2 C 4 2 PC Resolution Dot rate MHz H freq KHz Mode Resolution V freq Hz Remark 25 175 31 469 VGA 1 640 350 70 086 25 175 31 469 IBM VGA 640 480 59 940 31 500 37 500 VGA 640 480 75 000 28 322 31 469 VGA 720 400 70 087 36 000 35 156 VESA 800 600 56 250 40 000 37 879 VESA ...

Page 107: ... white pattern with brightness in 50 position and the contrast control at 50 position The 1931 CIE Chromaticity color triangle diagram X Y coordinate for the screen center should be For NORMAL COLOR Equivalent 6500 K X 0 313 0 030 Y 0 329 0 030 For COOL PRESET Equivalent 9300 K X 0 283 0 030 Y 0 297 0 030 For WARM PRESET Equivalent 5700 K X 0 328 0 030 Y 0 344 0 030 4 7 TV White color adjustment S...

Page 108: ...00 16494 2005 06 10 2005 06 10 590 30 45 Freud Yu 108 420WN6 LCD TV Left size Right size 3mm Up size Down size 3mm 4 9 HD support timing 1920X1080I 60Hz 1920X1080I 50Hz 1280X720P 60Hz 1280X720P 50Hz 720X576P 50Hz 720X480P 60Hz 720X576i 50Hz 720X480i 60Hz For Quantum Data setting with Q801GD or Q802G with YPbPr mode ...

Page 109: ... us Pulse delay 44 pixels 0 593 us 70 pixels 0 943 us 484 pixels 6 519 us 400 pixels 5 387 us Pulse width 44 pixels 0 593 us 40 pixels 0 539 us 44 pixels 0 593 us 40 pixels 0 539 us Vertical Frequency 60 Hz 60 Hz 50 Hz 50 Hz Active 1080 lines 32 000 ms 720 lines 16 0 ms 1080 lines 38 4 ms 720 lines 19 2 ms Blank 45 lines 1 333 ms 30 lines 0 667 ms 45 lines 1 6 ms 30 lines 0 8 ms Period 1125 lines ...

Page 110: ...ixels 0 444 us 16 pixels 0 592 us 12 pixels 0 889 us 19 pixels 1 407 us Pulse width 63 pixels 2 333 us 62 pixels 2 294 us 63 pixels 4 667 us 62 pixels 4 593 us Vertical Frequency 50 Hz 60 Hz 50 Hz 59 94 Hz Active 576 lines 18 432 ms 480 lines 15 238 ms 576 lines 36 864 ms 480 lines 30 507 ms Blank 49 lines 1 568 ms 45 lines 1 429 ms 49 lines 3 136 ms 45 lines 2 860 ms Period 625 lines 20 000 ms 52...

Page 111: ...or Rear I O AC inlet AC switch Speaker out R R L L DVI D in VGA out RS232 in RS232 out VGA in Mini jack PC audio input Compoent YpbPr video in support from 480i to 1080i L R audio input for Compoent video EXT IN SCART CVBS out L R audio output S Video input CVBS in L R audio input for CVBS and S video Headphone Tuner RF input 5 2 Unit dimension Weight Set dimension 1052 mm W x 680 mm H x 300 mm D ...

Page 112: ... Environmental characteristics The following sections define the interference and susceptibility condition limits that might occur between external environment and the display device 6 1 Susceptibility of display to external environment Operating Temperature 0 to 40 Humidity 10 to 90 Altitude 0 to 12000 feet Air pressure 645 mBAR guaranteed optical performance 5 to 35 guaranteed functional perform...

Page 113: ...Truck spectruh 5 500Hz 30min for each axis 3AXES Test Test Electrical function ok Result Mechanical function ok No serious damage on set appearance 6 3 Display disturbances from external environment According to IEC 801 2 for ESD disturbances 7 0 Reliability 7 1 Mean Time Between Failures System MTBF Excluding the LCD panel and CCFL 50 000 hrs CCFL MTBF 50 000 hrs 8 0 Quality assurance requirement...

Page 114: ... BRAND PHILIPS 8639 000 16494 2005 06 10 2005 06 10 590 36 45 Freud Yu 114 420WN6 LCD TV 10 0 Appendices Fig 1 Pattern 1 Brightness and Uniformity measure points Pattern 2 Cross talk pattern Gray level 184 256 Gray level b b 1 2 3 5 4 H 2 3H 4 V 4 V 2 3V 4 H 4 H V a b a b a b a b YA 1 2 1 2 1 6 ...

Page 115: ...page GENERAL PRODUCT SPECIFICATION BRAND PHILIPS TYPE 420WN6VB 00 8639 000 16494 2005 06 10 2005 06 10 45 Freud Yu 42 BDS WXGA TFT LCD Monitor TV Pattern 3 Cross talk Pattern Center at Gray level 0 Black YB 1 2 1 2 1 6 1 3 1 3 1 3 1 3 1 3 ...

Page 116: ... White 2 AU2 64 25MHz 69 75MHz PAL B UK Circle Pattern 3 E7 189 25MHz 194 75MHz PAL B CCIR Circle Pattern 4 G47 679 25MHz 684 75MHz PAL G CCIR Circle Pattern 5 I23 487 25MHz 493 75MHz PAL I UK Circle Pattern 6 E12 224 25MHz 229 75MHz PAL B CCIR Color Bar 7 AU7 182 25MHz 187 75MHz PAL B UK Color Bar 8 G68 847 25MHz 852 75MHz PAL G CCIR 100 White 9 AU9 196 25MHz 201 75MHz PAL B UK Checkerboard 10 AU...

Page 117: ...182 25MHz 187 75MHz PAL B UK Pure White 16 AU9 196 25MHz 201 75MHz PAL B UK Pure White 17 AU10 209 25MHz 214 75MHz PAL B UK Circle Pattern 18 I23 487 25MHz 493 75MHz PAL I UK Circle Pattern 19 G28 527 25MHz 532 75MHz PAL G CCIR Circle Pattern 20 AU37 590 25MHz 595 75MHz PAL G UK Circle Pattern 21 I40 623 25MHz 629 75MHz PAL I UK Color Bar 22 CH44 655 25MHz 661 75MHz PAL DK UK Color Bar 23 I60 783 ...

Page 118: ...488 494 18 495 25 499 75 494 500 19 501 25 505 75 500 506 20 507 25 511 75 506 512 21 513 25 517 75 512 518 22 519 25 523 75 518 524 23 525 25 529 75 524 530 24 531 25 535 75 530 536 25 537 25 541 75 536 542 26 543 25 547 75 542 548 27 549 25 553 75 548 554 28 555 25 559 75 554 560 29 561 25 565 75 560 566 30 567 25 571 75 566 572 31 573 25 577 75 572 578 42 579 25 583 75 578 584 33 585 25 589 75 ...

Page 119: ...75 800 806 US Cable channel Cable Channel Video carrier MHz Audio carrier MHz Range MHz 2 55 25 59 75 54 60 3 61 25 65 75 60 66 4 67 25 71 75 66 72 1 73 25 77 75 72 78 5 79 25 83 75 76 82 6 85 25 89 75 82 88 95 91 25 95 75 90 96 96 97 25 101 75 96 102 97 103 25 107 75 102 108 98 109 25 113 75 108 114 99 115 25 119 75 114 120 14 121 25 125 75 120 126 15 127 25 131 75 126 142 16 133 25 137 75 142 13...

Page 120: ...25 365 75 360 366 48 367 25 371 75 366 372 49 373 25 377 75 372 378 50 379 25 383 75 378 384 51 385 25 389 75 384 390 52 391 25 395 75 390 396 53 397 25 401 75 396 402 54 403 25 407 75 402 408 55 409 25 413 75 408 414 56 415 25 419 75 414 420 57 421 25 425 75 420 426 58 427 25 431 75 426 442 59 433 25 437 75 442 438 60 439 25 443 75 438 444 61 445 25 449 75 444 450 62 451 25 455 75 450 456 63 457 ...

Page 121: ... 648 100 649 25 653 75 648 654 101 655 25 659 75 654 660 102 661 25 665 75 660 666 103 667 25 671 75 666 672 104 673 25 677 75 672 678 105 679 25 683 75 678 684 106 685 25 689 75 684 690 107 691 25 695 75 690 696 108 697 25 701 75 696 702 109 703 25 707 75 702 708 110 709 25 713 75 708 714 111 715 25 719 75 714 720 112 721 25 725 75 720 726 113 727 25 731 75 726 742 114 733 25 737 75 742 738 115 7...

Page 122: ...PAL B UK Pure White 2 AU2 64 25MHz 69 75MHz PAL B UK Circle Pattern 3 E7 189 25MHz 194 75MHz PAL B CCIR Circle Pattern 4 G47 679 25MHz 684 75MHz PAL G CCIR Circle Pattern 5 I23 487 25MHz 493 75MHz PAL I UK Circle Pattern 6 M58 735 25MHz 739 75MHz NTSC M CCIR Color Bar 7 AU7 182 25MHz 187 75MHz PAL B UK Color Bar 8 K21 471 25MHz 477 75MHz PAL G CCIR 100 White 9 AU9 196 25MHz 201 75MHz PAL B UK Chec...

Page 123: ...ar Table 4 China model China TV preload Channels Signal Distribution Table PAL D Frequency Carriers PRG CH Video Sound TV System Pattern 1 C 4 65 25MHz 71 75MHz PAL D CCIR Full Write 2 E 7 184 25MHz 190 75MHz PAL D CCIR Circle Pattern 3 E12 224 25MHz 230 75MHz PAL D CCIR Color Bar 4 K21 471 25MHz 477 75MHz PAL D CCIR Full Write 5 G34 511 25MHz 517 75MHz PAL D CCIR Circle Pattern 6 G62 547 25MHz 55...

Page 124: ...64641 EEPROM ASSY LG AP 0292 313815567661 LABEL LG AP 3071 212255000177 VDR DC 1MA 459V S MAX 845V R 0191 313815161901 HEAT SINK P T 0174 313815160891 HEATSINK 0194 313815161921 HEAT SINK B D 0197 313810340032 INSULATION PLATE 0185 313815161911 HEAT SINK P D 0187 313810340032 INSULATION PLATE 0290 313800992071 PROCESS BOX 1061 313819876041 SOC POW H 3P F AC CABL 100 0289 313800992071 PROCESS BOX 1...

Page 125: ...08584 0615 Hex code LG NAFTA 3138 117 08592 3138 177 08593 0615 Hex code LG China 3138 117 08601 3138 177 08602 2 According to the ECO CA005742 the panel of BDL4221VS 00 BDL4221V 00 BDL4221V 27 420WN6QS 93 420WN6QS 97 and BDL4221V 93 was changed Following is the details Action Item 12NC Description From 1050 823827718421 TFT LCD MOD LC420W02 B6 To 1050 823827720851 LCD LC420W02 SLA1 3 According to...

Page 126: ...6496 420WN6QS 93 2 863900016497 420WN6QS 97 4 863900016577 BDL4221V 93 REF 12NC Description 1 313815863511 EEPROM ASSY LG WE 2 313815864641 EEPROM ASSY LG AP 3 313815864671 EEPROM ASSY LG NAFTA 4 313815864711 EEPROM ASSY LG CHINA REF Action Item 12NC Description From 292 313815567593 LABEL LG WE 1 To 292 313815567594 LABEL LG WE From 292 313815567664 LABEL LG AP 2 To 292 313815567665 LABEL LG AP F...

Page 127: ...5 Initial Release 313810610491 10 Jan 06 Different parts list Updated P124 313810610492 11 Feb 06 Updated for 420WN6QS P125 313810610493 27 Mar 06 Panel chenged P125 313810610494 23 May 06 Modify BDS 42 mount mediator P125 313810610494 02 Aug 06 new software to update p126 313810610494 21 Sep 06 new software to update p126 ...

Page 128: ...ians review test procedures so that HV requation are always checked as a standard servicing procedure and the reason for this prudent routine is cleary understood by everyone It is important to use an accurate and reliable HV meter It is recommended that the HV recorded on each customer s invoice which will demonstrate a proper concern for the customer s safety 5 When troubleshooting and making te...

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