Akai PDP4206EM - 42" Plasma EDTV Service Manual Download Page 91

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Horizontal (bar)

4. Trouble shooting.

1. Connector

It can make a horizontal bar that connector on Y b/d and Z b/d did not plugged well. Because sustain voltage
can not be supplied to panel. So check connectors (FPC, Y drv –Y drv) first.

Most horizontal defects can be repaired. In case of adherence part of the Film and rear panel

electrode defect or panel electrode open,short , replace the panel.

Disconnected

Screen off

Horizontal bar

Summary of Contents for PDP4206EM - 42" Plasma EDTV

Page 1: ...IC Specifications Product Specification of PDP Module Trouble Shooting Manual of PDP Module Spare Part List Exploded View If you forget your V Chip Password Software Upgrade This manual is the latest...

Page 2: ...k of electric shock to persons The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the l...

Page 3: ...way from high voltage or high tempera ture components 8 Before returning the set to the customer always perform an AC leakage current check on the exposed metallic parts of the cabinet such as antenna...

Page 4: ...ER OF PAGES 9 REVISIONS ISSUED DATE DESCRIPTION RAISED BY SPECIFICATION AGREED SIGNATURE DATE R D DEPARTMENT COMMERCIAL DEPARTMENT PRODUCTION DEPARTMENT Q A DEPARTMENT CUSTOMER SPECIFICATION APPROVED...

Page 5: ...0 photometer 1 6 Magnetic field no restricted 1 7 Control settings Brightness Contrast Tint Color set at Center 50 1 8 Power input 110 120Vac 1 9 Ambient temperature 20 C 5 C 68 F 9 F 1 10 Display mod...

Page 6: ...2 2 7 Withstanding voltage 1 5kVac or 2 2kVdc for 1 sec 3 Display 3 1 Screen Size 42 Plasma monitor 3 2 Aspect Ratio 16 9 3 3 Pixel Resolution 852x480 3 4 Peak Brightness 1000 cd m Panel module withou...

Page 7: ...5 2 2 Relative humidity 5 to 95 6 Panel Characteristics 6 1 Type LG V6 6 2 Size 42 1005mm width x597mm height x61mm depth 1 mm 6 3 Aspect ratio 16 9 6 4 Viewing angle Over 160 6 5 Resolution 852x480...

Page 8: ...elect Button Push the key to select the input signals source 7 2 Stand by Button Switch on main power or switch off to enter power Saving modes 7 3 Main Power Switch Turn on or off the unit 8 OSD Func...

Page 9: ...MBER 6 OF 9 PAGES 9 Agency Approvals Safety UL60950 Emissions FCC class B 10 Reliability 11 1 MTBF 20 000 hours Use moving picture signal at 25 C ambient 11 Accessories User manual x1 Remote control x...

Page 10: ...800 x600 37 90 60 32 40 00 10 800 x600 46 90 75 00 49 50 11 800 x600 48 08 72 19 50 00 12 800 x600 53 70 85 00 56 25 13 832 x624 49 00 75 00 57 27 14 1024 x768 48 40 60 00 65 00 15 1024 x768 56 50 70...

Page 11: ...NUMBER 8 OF 9 PAGES 13 Remote Function Sleep Mute YPbPr PC Standby on off Number Buttons Channel up Channel down Return PIP EXIT Button Video BBE Wide VOL Up Down Left Right Button SRS ZOOM plus minu...

Page 12: ...TERISTICS 14 Power Cord Length 1 8m nominal Type optional 15 Cabinet 15 1 Color Black colour as defined by colour plaque reference number 15 2 Weight with stand Net weight 84 5lbs 38 3kg 15 3 Dimensio...

Page 13: ...mon sustain driver Display data Driver timing Memory Controller Driver Timing Controller Input Interface Controller Vcc 5V Va 55V 65V Vs 180V 190V Control Signal Serial Interface APL Data LVDS Input A...

Page 14: ...Block Diagram...

Page 15: ...ower supply board of PDP Module DGP 420WXGA Power supply board of PDP Module USP490M 42LP Main Video board Audio Tuner board Keypad board Remote control receiver board External L R Speakers board Remo...

Page 16: ...45 3KF R716 D208 BYV26EGP 3 3KF R509 F101 250VAC 8A R148 100KF Q200 KTA1281 R136 10KF 18KF R615 R144 10F 35V 47uF C120 R153 100KF R306 5W6 8 C202 35V 47uF 35V 47uF C215 1uF C203 CN801 171825 7 1 2 3...

Page 17: ...USP490M 42LP...

Page 18: ...E 7 0 MCKEXT RXD IRRCVR1 RESET DCKEXT VPEN VVS VFIELD GPEN ICSCLK ICSSTD ICSSTM ICSDAT LED R LED G NDSP_EN DTXON VGASEL DVS DENB DENG DENR DHS GAFEOE GDFEOE VVINT VHS MUTE SLEEP1 PIO3 CPUGO PDPGO SCL...

Page 19: ...0 1uF U8A 74LVC126A 1 2 3 7 14 C35 0 1uF C49 47uF C65 47nF C54 0 1uF U8D 74LVC126A 13 12 11 C57 0 1uF C51 0 1uF C55 0 1uF TP8 U7 AD9883A_140 19 18 17 16 15 14 13 12 77 76 75 74 73 72 71 70 9 8 7 6 5...

Page 20: ...420_OHM_200MA U3 LM2937_SOT223 1 2 3 4 VI GND VO TAB C14 0 1uF RP12 47R L15 FB_420_OHM_200MA C16 47uF RP11 47R R15 510 TP5 RP5 47R RP3 47R RP8 47R C23 10uF C19 0 1uF L16 FB_420_OHM_200MA C27 10uF TP1...

Page 21: ...29 30 31 32 33 34 35 36 38 39 40 41 42 43 44 45 1 2 3 4 5 6 7 8 17 18 19 20 21 22 23 24 25 48 26 28 11 12 14 47 16 VCC VPP GND1 GND2 D1 D9 D2 D10 D3 D11 D4 D12 D5 D13 D6 D14 D7 D15 D8 D16 A15 A14 A13...

Page 22: ...CLK VCC R12 75 J1 YUV 1 2 3 4 5 6 7 8 9 J15 DB15HD_V 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 D2 BAV99L 1 3 2 R5 3 3K C3 12pF C8 12pF L9 FB_40_OHM_500MA C7 12pF J2 DVI_V 1 2 3 4 5 6 7 8 9 10 11 12 13...

Page 23: ...TXE3p ABE6 ARE5 ABE5 DBE5 DBE6 TXECKm V33 V33 V33 V33 V33 V33 R143 0 RP51 47R RP52 47R R144 0 C275 0 1uF RP60 47R J14 JEA31 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...

Page 24: ...R118 NS C237 0 1uF DCKEXT1 U25 MAX232A 15 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 GND VCC C1P VP C1M C2P C2M VM TOUT2 RIN2 ROUT2 TIN2 TIN1 ROUT1 RIN1 T1OUT U24 TLC7733 4 5 2 8 6 1 3 7 GND RESET RESIN VDD...

Page 25: ...3 Y4 Y5 Y6 Y7 U0 U1 U2 U3 U4 U5 U6 U7 V0 V1 V2 V3 V4 V5 V6 V7 DVDLLC DVDB DVDHS DVDVS ODD VS HS HREF CREF LLC HRC LLAD2 HRA CLV HREFO LLA RESET DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 DQ8 DQ9 DQ10 DQ11 DQ12 D...

Page 26: ...ying Multimedia Technology Co Ltd Drawn by Checked by Approved by V25ADJ V25 5VIN VCC VCC V33 VCC U29 LM3940IS 3 3 1 2 3 ADJ VO VI R126 510 C261 0 1uF R129 510 C259 220uF 16V 1 2 C253 0 1uF C251 0 1uF...

Page 27: ...B14 A14 D15 C15 B15 A15 D16 C16 A16 B16 B18 A21 B21 C21 A22 VR0 VR1 VR2 VR3 VR4 VR5 VR6 VR7 VG0 VG1 VG2 VG3 VG4 VG5 VG6 VG7 VB0 VB1 VB2 VB3 VB4 VB5 VB6 VB7 VCLK VPEN VLAV VVS VFIELD VHS C183 0 1uF Di...

Page 28: ...EDGE VCC VCC VCC VCC IVCC IVCC IVCC GND GND GND GND PGND2 AGND AGND PGND1 TX0 TX0 TX1 TX1 TX2 TX2 TXC TXC EXT_SWING DIO16 DIO17 DIO18 DIO19 DIO20 DIO21 DIO22 DIO23 DIO8 DIO9 DIO10 DIO11 DIO12 DIO13 DI...

Page 29: ...1 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 B1 CB1IN G1 Y1IN R1 CR1IN B2 CB2IN G2 Y2IN R2 CR2IN ASGF1 NC1 VSUPCAP VSUPD GNDD1 GNDCAP SCL SDA RESQ TEST VGAV YCOEQ FFIE FFWE FFRSTW FFRE F...

Page 30: ...C B B A A 03_AUDIO 03_AUDIO SIF SCL5V SDA5V AUDIO OUTL AUDIO OUTR 04_MCU AMP 04_MCU AMP IR POWER_ON RELAY MUTE OUTA OUTB MUTE1 02_INPUT 02_INPUT OUTA OUTB AUDIO OUTL AUDIO OUTB SIF SDA5V SCL5V IR MUT...

Page 31: ...Audio Tuner...

Page 32: ...Audio Tuner...

Page 33: ...Audio Tuner...

Page 34: ...Keypad Remote control receiver External L R Speakers...

Page 35: ...Remote control...

Page 36: ...ustainer board 2 pc s Y Drive board 2 pc s X left and right Extension PCB 1 pc Control Signal Input and 1 pc Power board in the Module SET There are 5 pc s PCBs including 1 pc Tuner Audio board 1 pc K...

Page 37: ...ker Right Power Supply Internal Speaker Left Z Sustainer Y Sustainer External Speaker Terminals Tuner Audio EMI filter AC Inlet Control Signal Input Main Video Local key Stand X left Extension X right...

Page 38: ...ransmit to Control board 3 Control board Dealing with the digital signal for output to panel 4 Y Sustainer Z Sustainer board 1 Receiving the signals from Control and high voltage supply 2 Output scann...

Page 39: ...ight d Abnormal noise on screen 3 POWER No picture no power output 4 Z Sustainer a No picture b Color not enough c Flash on screen 5 Y Sustainer Darker picture with signals 6 Audio Bard a No voice Mak...

Page 40: ...will send ON Control signals to Power Then Power sends 5Vsc 9Vsc 24V and RLY ON Vs ON to PCBs working This time VIF will send signals to display back light OSD on the panel and start to search availa...

Page 41: ...MSPS Analog Interface for Flat Panel Displays NV320 Video Enhancement Processor VCP 323XD comb Filter Video Processor SiI161B Panel Link Receiver Z86229 NTSC Line 21 CCD Decoder TDA9850 BTSC stereo SA...

Page 42: ...ternal crystal to generate all necessary clocks for the system An integrated OSD controller provides bit mapped based OSDs with 16 colors from a 64K color palette The OSD controller supports transpare...

Page 43: ...The AD9883A is a complete 8 bit 140 MSPS monolithic analog interface optimized for capturing RGB graphics signals from personal computers and workstations Its 140 MSPS encode rate capability and full...

Page 44: ...ackground coloring Anti flickering circuitry NTSC PAL to SDTV 480p format conver sion Frame rate up conversion 50Hz up to 75Hz for PAL 60Hz up to 90Hz for NTSC DCTI Digital Color Transient Improve men...

Page 45: ...0 Part Number NV320 Package PQFP 208 Description Plastic quad flat pack age 208 leads Version 1 0 nDSP Video Enhancement Processor Timing Controller Memory Controller 10 Bit DAC 10 Bit DAC 10 Bit DAC...

Page 46: ...one S VHS input one CVBS output Two RGB YCrCb component inputs one Fast Blank FB input Integrated high quality A D converters and associated clamp and AGC circuits Multi standard sync processing Line...

Page 47: ...logy simplifies PC and display interface design by resolving many of the system level issues associated with high speed mixed signal design providing the system designer with a digital interface solut...

Page 48: ...application The robust nature of the Z86229 helps the device conform to the transmissionformat defined in the Television Decoder Circuits Act of 1990 and in accordance with the Electronics Industry As...

Page 49: ...o and SAP off I2 C bus transceiver NJW1144 AUDIO PROCESSOR GENERAL DESCRIPTION The NJW1144 is a sound processor includes all of the functions required to process the audio signal for TV such as tone c...

Page 50: ...e product immediately turn off the power Continuing to use the products it may cause fire or electric shock 5 If the product emits smoke an abnormal smell or makes an abnormal sound immediately turn o...

Page 51: ...ng a cable with excessive force may cause the core of the cable to be exposed or break the cable and this can lead to fire or electric shock 5 This product should be moved by two or more persons If on...

Page 52: ...g is wrong or if a voltage outside the rated range is applied the product may malfunction or be damaged 6 Do not store this product in a location where temperature and humidity are high This may cause...

Page 53: ...V pixels This is the display device which offers vivid colors with adopting AC plasma technology by LG Electronics Inc FEARURES High peak brightness 1000cd m2 Typical and high contrast ratio 3000 1 Ty...

Page 54: ...V 1pixel 3 RGB cells 1080 H 1080 V 367 H 1080 V Green Cell basis 920 1 H 518 4 V 0 5mm 1005 H 597 V 61 D 1mm RGB Closed type R 256 G 256 B 256 16 7 Mega colors 14 8 Kg 0 5 Kg Net 1EA 111 Kg 5 Kg 5EA...

Page 55: ...Connector P2005 Pin Assignment 9 Module side connector 1 1123723 10 Header 9 Mating Connector 1 1123722 10 Housing 9 Connector Supplier AMP 1 1123723 10 Pin numbers Top View viewed from the pin conne...

Page 56: ...3 4 GND CN801 1 ACD 2 RLY ON 3 5Vst_by 4 GND 5 Vs ON 6 5VD 7 NC CN02 CN03 CN01 Before connecting with S W From inlet AMP 171825 2 CN809 AMP 171825 8 CN808 AMP 1 1123723 8 CN807 AMP 1 1123723 0 CN806...

Page 57: ...ace B D CN02 CN03 CN01 Connect with Noisefilter Cable Live Neutral Live Neutral 1 2 1 2 1 2 You can select output Audio Voltage 24V or 30V Vs adj Va adj Vs Voltage Variabe Resistor Turn right increase...

Page 58: ...R G B H Vsync X left Z SUS 3211QKE008A Coner Plate P N carved 8 LABEL LABEL Sticking Position Identification Label LABEL Model Name Bar Code Code 128 Contains the manufacture No Manufacture No The tr...

Page 59: ...Trouble Shooting Manual of PDP Module Introduction Precautions Basic Trouble shooting...

Page 60: ...COMPOSITION OF PDP BOARDS CONTROL B D Y DRIVE BOTTOM Y SUS B D Y DRIVE TOP X LEFT B D X RIGHT B D Z SUS B D COF COF IPM IPM 1 Introduction PSU 42 V6 MODEL...

Page 61: ...efinition of MODULE position 6 2004 02 402K242V6000266 ASLGA Identification label Model Name Bar Code Code 128 Contains the manufacture No Manufacture No The trade name of LG Electronics Manufactured...

Page 62: ...setup Voltage label Attached on back side of module Part No label Attached on board COF serial No label attached on COF 1 Introduction PCB PART NO BOARD ASS Y PART NO BOARD NAME BOARD SERIAL NO COF SE...

Page 63: ...8 40 Terms of defect Add short line on Sus open line off Sus short line on Add open line off Appearance Term 1 Introduction...

Page 64: ...by two man 6 Be careful with short circuit of PDP boards when measuring any voltages 2 Precaution Be sure to read this before service When using handling this PDP module Please pay attention to the b...

Page 65: ...RATCHING TEARING BEING PUSHED BENDING CHOPING 2 Precaution COF is the most important component in the PDP module Even a little imperfection of COF can make a serious screen problem Handle with care CO...

Page 66: ...X B D COF Separating receiving LOGIC signal from CONTROL B D and make ADDRESS PULSE generates Address discharge by ON OFF operation and supplies this waveform to COF data Power part Signal part Lift...

Page 67: ...waveform is supplied to panel through FPC Z composed with IPM FET DIODE electrolytic capacitor E R coil IPM Intelligent Power Module E R Energy recovery Separate the fixed Screw of Z Board Pull out L...

Page 68: ...Supply a wave form that select Horizontal electrode Y SUSTAIN electrode sequentially potential difference is 0V between GND and Vpp of DRIVER IC in SUSTAIN period being generated potential difference...

Page 69: ...it Y DRIVER B D Composed with IPM DIODE electrolytic capacitor FET creates signal processing Contour noise reduction ISM and an order of many FET on off of each DRIVER B D with R G B each 8bit input...

Page 70: ...C converter makes 5V Va Vs Vset_up Vsc which is essential for each B D There is no DC DC B D in model 40 42 1 POWER B D 50 60 embedded DC DC B D separately because of high power consumption DC DC con...

Page 71: ...Y B D One is single sided another is double side These are having pattern on it for Z B D there is no pattern single sided and Beta type all of copper surface for connecting a Logic signal between B D...

Page 72: ...on it in B D without using IC PACKAGE we can use a BARE IC so we can get IC with LOW COST because we do not solder IC on PCB directly a soldering defect rate decrease composition 1 FPC Heat Sink FPC...

Page 73: ...EATSINK CAPACITOR DIODE IC LINEAR RESISTORTANSISTOR FETS description Attached at Z B D and Y B D make Sustain waveform Sustainer supply a square wave to panel to make a video 10 IPM Intelligent Power...

Page 74: ...eck model No of module all connectors and cables Check panel appearance Check PSU output Va Vs 5v Check Y Z b dinput voltage Replace ctrl b d Replace Y Z b d Check panel appearance Check COF Replace c...

Page 75: ...discharge on screen No display Logical judgment What kind of defect Please follow the no display trouble shooting Bar defect appeared Line defect Please follow the mis discharge trouble shooting Pleas...

Page 76: ...send signal and power Also Mis connection for a long time has a specific b d failed 1 Connector 4 Trouble shooting No display CTRL B D Y SUS CTRL B D Z SUS CTRL B D X B D Signal input LVDS Check each...

Page 77: ...e is problem replace the module in case of vacuum breakdown module makes a shaking noise because of inside gas ventilation there may be a small crack which could not see with naked eyes And this noise...

Page 78: ...V to DC V voltage Check 5V Va Vs When PSU Protection occurred Check Short between Y SUS Z SUS B D 3 PSU Power Supply Unit Fuse open check SW1 Normal Multi meter Touch point 5V Va Vs must accord with...

Page 79: ...3 Check CTRL input voltage CONNECTOR P300 4 CHECK 3 3V 5V 15V 5 Check IC 11 3 3V IC 3 2 5V 4 Ctrl B D 4 Trouble shooting Check oscillating state normal 100 MHZ Be careful with physical shock Probe To...

Page 80: ...ck voltages Vsetup Vy Vscw 3 Check DIODE between GND and Y SUS output SUSUP OC2 SUSDN OC1 forward 0 4 reverse OVERLOAD 4 Check whether output voltages agrees with voltage that represented in label Vse...

Page 81: ...Normal diode value OL reverse Normal diode value 0 4 forward Check whether output voltages agrees with voltage that represented in label 4 Trouble shooting Check diode value GND between Y SUS output...

Page 82: ...sus B D Va FUSE 6 3A Vs FUSE 2A or 4A 5V FUSE 1 Check the FUSE 2 Check input voltages Va 5V 15V 3 Check FPC out put diode value 4 Check ramp waveform 4 Trouble shooting Check the FUSE Check input volt...

Page 83: ...tion check certainly after removing FPC Normal diode value OVER LOAD reverse Check FPC output diode value Normal diode value 0 375 forward Variable resistance of Z RAMP waveform slope 4 Trouble shooti...

Page 84: ...is off automatically within 2 3 min from power on Power protection function protect the boards when occurred short on circuits of PDP module or power problem If can not impress power even after repla...

Page 85: ...ell it will Make a bar defect Bar Check here 2 Checking COF Confirm whether COF was torn And then check input of COF resistor and IC Tearing COF 6 is torn partly Check here Off Check each section with...

Page 86: ...or and IC 4 Trouble shooting COF resistor checking Check the both side of resistor With Digital multi meter DMM If the resistor is normal the resistor value will be 10 2 10 8 But if not the value will...

Page 87: ...put 2 how to check 1 contact DMM terminal to a right terminal of condenser GND and DMM terminal to a right terminal of IC normal value 0 66 fig 1 2 contact DMM terminal to Output terminal of resistor...

Page 88: ...ow of address signal In this figure we can easily suppose what will be appeared on screen when a specific part failed Diagram of ctrl b d 3 Ctrl B D CTRL B D supplies video signal to COF So if there i...

Page 89: ...ng This is MCM of Ctrl b d defect MCM can not be replaced separately So replace the ctrl b d 1 line open or short Line open or short with same distance MCM Multi Chip Module 1 line open In case of 1 l...

Page 90: ...96 open COF IC 3 4 64 line open with fixed interval there is on off Repetition case 2 Array resistor fail COF IC1 16 line COF IC2 16 line open case3 COF IC fail 96 line open line defect from each par...

Page 91: ...plugged well Because sustain voltage can not be supplied to panel So check connectors FPC Y drv Y drv first Most horizontal defects can be repaired In case of adherence part of the Film and rear panel...

Page 92: ...C 1 035 It can be different from each IC Maker in case of TI IC 0 6 0 7 Defect diode value 0 018 Check diode value of the right side part of output pin 2 Scan IC check 4 Trouble shooting Check here wi...

Page 93: ...PC In case of horizontal 1 or more line it is due to FPC or panel inside ctrl b d Y b d is just normal 2 Check scan IC Check with same method that presented in Horizontal bar FPC electrode open Panel...

Page 94: ...COM ER UP when each 4 nodes TEST Diode value is infinity OK Specially the value of ER UP COM DN in the Y Z board should be checked all of them but the terminal of Vs Sus out GND we must aware to know...

Page 95: ...GIFT BOX HANDLE 34B8 PCS 2 3 248 46D201 01 HANDLE FOR PLASMA PCS 2 4 263 42D101 01S POWER LENS 42D1 PCS 1 5 269 42D101 01L REMOTE LENS 42D1 PCS 1 6 326 050010 40 SPONGE CUSHION 500X10X4 0MM W ADHESI...

Page 96: ...4 0 W CONDUCTIVE PCS 2 47 554 080030 01 SHIELD CLOTH 80X30MM W CONDUCTIVE AD PCS 2 5 48 563 119 SERIAL NO LABEL PCS 1 49 568 P46T02 02 WARNING LB ENG 42SF NIL PCS 1 50 579 42D102 09 SERIAL NO BAR CODE...

Page 97: ...ACCESSORY BOX PCS 1 2 790 003603 A9 AKAI Remote 0036 for PDP4206EM PCS 1 3 580 42D101 11 INSTRUCTION BOOKLET E FOR AKAI PDP42 PCS 1 4 310 111404 07V POLYBAG 11 X14 X0 04 PCS 1 5 E3404 157001 AC CORD U...

Page 98: ...Exploded View...

Page 99: ...V5 V6 1 29 E4405 035001 AC LINE FILTER 1 28 601 306008 10 MACH SCREW 3x8 2 27 E4101 027001 POWER SWITCH 1 26 771 42D102 01 AV JACK PCB 1 25 423 42D114 01 MAIN BKT FOR V6 FORMOSA 2 24 423 42D107 01 PA...

Page 100: ...5 4 6 7 8 PDP D Sub 9 Software upgrade Connect the RS 232C input jack to an external control device such as a computer and software upgrade Type of connector D Sub 9 pin male RS 232C configurations If...

Page 101: ...re upgrade Process Power Switch OFF Connect the RS 232 jack of the computer to the RS 232 jack on the plasma back panel RS 232C connection cables are not supplied with the Plasma Computer RS 232 PDP R...

Page 102: ...or on the front of the panel should now display red that the Plasma is in standby mode Copy the software Flash Upgrader to the computer Open the software Flash Upgrader exe Point Flash on the interfac...

Page 103: ...ndicator is extinguished Note The computer and plasma must be keep Power ON in the software upgrade processing If the function is abnormal software upgrade again Hard Reset after the upgrader is finis...

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Akai PDP4206EM - 42" Plasma EDTV, Service Manual

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