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Internal Use Only Website http://biz.lgservice.com DVD Home Theater System SERVICE MANUAL MODEL: LHD625 (LHD625, S63S1-S, S63T1-C, S75T1-W) CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN77133590 JUNE, 2015...
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CONTENTS SECTION 1 ..SUMMARY SECTION 2 ..ELECTRICAL SECTION 3 ..CABINET & MAIN CHASSIS SECTION 4 ..REPLACEMENT PARTS LIST...
SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. Storage in conductive bag Drop impact 2.
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NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.
ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD 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 component damage caused by static electricity.
HIDDEN KEY MODE 1. DISPLAY SYSTEM INFORMATION 1) Change function to DVD/CD by pressing input key, and wait until home menu is shown. - Do not insert disc or USB at the set. 2) Go to SETUP menu by pressing SETUP button in HOME menu. 3) Move highlight at "DISPLAY ->...
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2. EEPROM EDIT 1) Change function to DVD/CD by pressing input key, and wait until home menu is shown. - Do not insert disc or USB at the set. 2) Press "PAUSE -> 1 -> 4 -> 7 -> 2" in order. 3) and then, option setting menu is displayed.
FIRMWARE UPGRADE GUIDE 1. MPEG 1) Copy fi rmware to USB (Do not change fi le name). Ex) LG_LHD655LD7_1501051.rom 2) Change function to DVD/CD by pressing input key, and wait until home menu is shown. 3) Inset USB device which includes fi rmware. 4) Firmware is detected automatically and then, shows blue screen in TV.
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2. AUDIO MICOM 1) Copy fi rmware to USB (Do not change fi le name). Ex) LHD655_1501050.HEX 2) Change function to DVD/CD by pressing input key, and wait until home menu is shown. 3) Inset USB device which includes fi rmware. 4) Firmware is detected automatically and then, shows blue screen in TV.
SPECIFICATIONS • GENERAL Power requirements Refer to main label. Power consumption Refer to main label. Networked standby 0.4 W (If all network ports are activated.) Dimensions (W x H x D) (360 x 60.5 x 299) mm without foot Net Weight (Approx.) 2.69 kg Operating temperature 5 °C to 35 °C...
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• SPEAKERS Front Speaker Type 1 Way 1 speaker Impedance Rated 3 Ω Input Power 167 W Max. Input Power 334 W Net Dimensions (W x H x D) (88 x 122 x 81) mm Net Weight 0.5 kg Rear Speaker Type 1 Way 1 speaker Impedance Rated...
DIGITAL DISPLAY & MEDIA TRAINING MASTER Objective: To provide clear and concise guidelines for customer service agents to handle calls on box goods calls. 1. DISTORTED PICTURE 1-1. Lines on Picture Distorted picture refers to the customer getting video, but there is a problem with the video. Determine what cables the customer is using to connect What cables is the DVD to the TV and if connected properly.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 1-2. Ghost Picture Distorted picture refers to the customer getting video, but there is a problem with the video. Determine what cables the customer is using to connect the DVD to the TV and if connected properly. Refer to OM for connections. What cables is the customer Tighten any loose cables.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 1-3. Rolling Picture Distorted picture refers to the customer getting video, but there is a problem with the video. Determine what cables the customer is using to connect the DVD to the TV and if connected properly. Refer to OM for connections. What cables is the customer Tighten any loose cables.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 1-4. Shaky Picture Distorted picture refers to the customer getting video, but there is a problem with the video. Determine what cables the customer is using to connect the DVD to the TV and if connected properly. Refer to OM for connections. What cables is the customer Tighten any loose cables.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 1-5. Blurry Picture Distorted picture refers to the customer getting video, but there is a problem with the video. Determine what cables the customer is using to connect the DVD to the TV and if connected properly. Refer to OM for connections. What cables is the customer Tighten any loose cables.
DIGITAL DISPLAY & MEDIA TRAINING MASTER 2. NO PICTURE 2-1. Black Screen The entire screen is black. Make sure the customer did not select 480i resolution in the menu Does the DVD on-screen of the DVD HTS if using HDMI connections. Change resolution on menu appear? upconversion DVD HTS by pushing the resolution button of the remote controller.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 2-2. Blue Screen The entire screen is a solid blue color. Make sure the customer did not select 480i resolution in the menu Does the DVD on-screen of the DVD HTS if using HDMI connections. Change resolution on menu appear? upconversion DVD HTS by pushing the resolution button of the remote controller.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 2-3. Snowy Screen A snowy picture is when black and white dots are all over the screen. Make sure the customer did not select 480i resolution in the menu Does the DVD on-screen of the DVD HTS if using HDMI connections. Change resolution on menu appear? upconversion DVD HTS by pushing the resolution button of the remote controller.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 2-4. No Signal A “no signal” message appears on the screen of the display. Make sure the customer did not select 480i resolution in the Does the DVD on-screen menu of the DVD HTS if using HDMI connections. Change resolution on menu appear? upconversion DVD HTS by pushing the resolution button of the remote controller.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 2-5. Invalid Format or Format Not Supported Customer’s using an DVI, or HDMI cable connection need to set the Is the customer using a resolution on the product above 480I. HDMI, digital cable connection? DVI connections can not process a 480I resolution.
DIGITAL DISPLAY & MEDIA TRAINING MASTER 3. PICTURE COLOR 3-1. No Color The video displays no color and only shows in black and white. Determine what cables the customer is using to connect the DVD What cables is the customer to the TV and if connected properly.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 3-2. Poor Color The color is poor. Examples would be washed out colors, colors bleeding into one another, or a solid tint to a screen. Determine what cables the customer is using to connect the DVD to What cables is the customer the TV and if connected properly.
DIGITAL DISPLAY & MEDIA TRAINING MASTER 4. NOISE/AUDIO PROBLEMS 4-1. No Audio The customer is not able to get audio. Determine what cables the customer is using to connect the DVD to the TV and if connected properly. Refer to OM for connections. What cables is the customer Tighten any loose cables.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 4-2. Distorted Audio The audio sounds muffled, scratchy, or the audio skips. Determine what cables the customer is using to connect the DVD to the TV and if connected properly. Refer to OM for connections. What cables is the customer Tighten any loose cables.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 4-3. Humming/Clicking Noise The unit is making a humming noise or a clicking noise. DVDs make a slight hum when playing discs. Does the noise only A clicking noise or a noise interfering with audio may indicate a problem. happen when a disc Try multiple discs.
DIGITAL DISPLAY & MEDIA TRAINING MASTER 5. MISCELLANEOUS 5-1. No Power The unit will not turn on. Is the unit plugged in? Make sure the unit is plugged into a surge protector or the wall. Does the unit turn on See if the unit will turn on when the power button the unit is pressed.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 5-2. Disc Error The unit displays “disc error” when a disc is inserted into the DVD HTS. Is the disc inserted into Make sure the disc has been inserted into the DVD HTS properly. the DVD HTS properly? The HTS can not read a disc inserted into the unit upside down.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 5-3. Unit Locks Up Unit does not respond to any commands. If the unit will turn on or off with the button on the unit, Does the unit respond to troubleshoot the remote control. Please refer to the buttons on the unit? Remote Control Not Working call flow.
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Please refer to the OM for instructions on how to program remote to TV. Customer wants to program a remote Does the customer want to other than Zenith or LG, the customer will need to contact program their remote? the manufacturer of the remote control. Codes do not work, remote is not compatible.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 5-6. Will Not Play Disc The unit will not play a disc when a disc is inserted into the HTS. Is the disc inserted into Make sure the disc has been inserted into the DVD HTS properly. the DVD HTS properly? The HTS can not read a disc inserted into the unit upside down.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 5-7. Disc Freezes or Skips The audio and video freeze and skip during play back of a DVD disc. Is the disc inserted into Make sure the disc has been inserted into the DVD HTS properly. the DVD HTS properly? The HTS can not read a disc inserted into the unit upside down.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 5-8. Can Access Menu, but Not Play a Movie The disc menu is displayed but the disc will not play. Go into the system information screen of the DVD HTS. To access this menu, bring up the main menu. Go to TV aspect, Check the system information highlight 16:9, press 1397139 and hit enter.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 5-10. Aspect Ratio The customer has bars on the top and bottom of the screen, the left and right of the screen, or both. A full screen movie played on a wide screen TV will have bars Is the movie wide screen on the left and right side of the TV.
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DIGITAL DISPLAY & MEDIA TRAINING MASTER 5-11. My Unit Won’t Upconvert The customer has a problem with getting the unit to change resolutions to 480p, 720p, 1080i, or 1080p. Ask the customer to press stop to stop the disc from playing. Is the disc Ask the customer to press the resolution button to change the resolution.
ONE POINT REPAIR GUIDE 1. NO POWER PROBLEM No power problem occurs when you power on the unit. 1-1. Fuse & Bridge diode 1-1-1. Solution Replace F901, BD901 on SMPS board. 1-1-2. How to troubleshoot (Countermeasure) 1) Look at the physical of fuse F901. 2) Check the bridge diode BD901.
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ONE POINT REPAIR GUIDE No power problem occurs when you power on the unit. 1-2. VFD, 14 VA, 5.5 VA 1-2-1. Solution Replace D922, D923, D924, D925, D926, D927, IC901. 1-2-2. How to troubleshoot (Countermeasure) Case 1) FLD abnormal: Check D950, D951, ZD951, ZD952, FR950 and replace it. Case 2) 5.5 VA abnormal: Check D952, D953 and replace it.
ONE POINT REPAIR GUIDE 2. NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE ON FRONT PANEL When you turn on your set, it will blank / no message on front panel, and stand-by led no working. 2-1. IC103 (No 3.3 VA) 2-1-1.
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ONE POINT REPAIR GUIDE When you turn on your set, it will blank / no message or Welcome on front panel, and it will not boot-up. 2-2. IC105 System 3.3 V (No System 3.3 V) 2-2-1. Solution Replace IC105 on MAIN board. 2-2-2.
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ONE POINT REPAIR GUIDE When you turn on your set, it will display “WELCOME” on front panel, and it will not boot-up normally. 2-3. X500 2-3-1. Solution Replace X500 on MAIN board. 2-3-2. How to troubleshoot (Countermeasure) 1) Please check the soldering status of 27 MHz crystal (X500). 2) Please check the frequency of 27 MHz crystal (X500).
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ONE POINT REPAIR GUIDE When you turn on your set, it will display “WELCOME” on front panel, and it will not boot-up normally. 2-4. IC504 (SERIAL FLASH MEMORY) 2-4-1. Solution Replace IC504 on MAIN board. 2-4-2. How to troubleshoot (Countermeasure) 1) Please check physical status of IC504 on your eyes.
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ONE POINT REPAIR GUIDE When you turn on your set, it will display “WELCOME” on front panel, and it will not boot-up normally. 2-5. IC503 (SDRAM MEMORY) 2-5-1. Solution Replace IC503 on MAIN board. 2-5-2. How to troubleshoot (Countermeasure) 1) Please check 3.3 V IC503. 2) If it doesn’t work even though IC105 is no problem, IC503 (DDR memory) could have problem.
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ONE POINT REPAIR GUIDE When you turn on your set, it will display “WELCOME” on front panel, and it will not boot-up normally. 2-6. IC500 (MPEG IC) 2-6-1. Solution Replace IC500 on MAIN board. 2-6-2. How to troubleshoot (Countermeasure) 1) Please Check 1.2 V of C510 on main board. Please Check 3.3 V of C548 on main board.
ONE POINT REPAIR GUIDE 3. BAD HDMI VIDEO / AUDIO OUTPUT When unit is connected to HDMI TV using HDMI cable, picture shows bad color, no output or mixed color on the screen. But component output is OK. 3-1. JK501 (HDMI JACK) 3-1-1.
ONE POINT REPAIR GUIDE 4. NO AUDIO FROM SPEAKER When unit is connected to speaker, no audio from speaker. 4-1. IC601 (PWM IC) 4-1-1. Solution Replace IC601 (PWM IC). 4-1-2. How to troubleshoot (Countermeasure) 1) Check IC601 pin soldering. 2) If there is short soldering on pin IC601, re-soldering pin IC601. 3) If problem still occurs, check AMP IC (IC700, IC701, IC702).
ONE POINT REPAIR GUIDE 5. NO USB When unit is connected to USB, no audio and video from SET. 5-1. IC500 (MT1389) 5-1-1. Solution Change IC500 (MT1389). 5-1-2. How to troubleshoot (Countermeasure) 1) MAIN board : Check CN103 connector and FFC cable. JACK board : Check CN2A3 connector.
ONE POINT REPAIR GUIDE 6. BT CONNECTION ERROR When you connect Wireless connection(like mobile phone, multi-room SPK, etc) through the BT, the “BT ERROR“ message appears. 6-1. BT module 6-1-1. Solution Replace BT module on Main chassis. 6-1-2. How to troubleshoot (Countermeasure) 1) Check your BT device.
ELECTRICAL TROUBLESHOOTING GUIDE 1. SYSTEM POWER SUPPLY ON SMPS BOARD No 5.5 VA Replace F901 (same fuse). Is F901 normal? Replace TH901. Is TH901 normal? Is BD901 normal? Replace BD901. Is the VCC Check or replace. (11 V ~ 25 V) supplied to IC901 pin7? Is D952, D953 normal? Replace D952, D953.
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ELECTRICAL TROUBLESHOOTING GUIDE No 14 VA Replace F901 (same fuse). Is F901 normal? Replace TH901. Is TH901 normal? Is BD901 normal? Replace BD901. Is the VCC Check or replace. (11 V ~ 25 V) supplied to IC901 pin7? Is D955, D956 normal? Replace D955, D956.
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ELECTRICAL TROUBLESHOOTING GUIDE No PVDD (36 VA / 26 VA) Check MICOM IC on MAIN board. Is the P-CTRL normal? Is the VCC Is Q902 normal? (11 V ~ 25 V) supplied to IC902 pin4? Check or replace Q902. Replace IC902. Is IC902 normal? Is Q951 normal? Replace Q901.
ELECTRICAL TROUBLESHOOTING GUIDE 2. POWER SUPPLY ON MAIN BOARD No 3.3 V Is the VCC supplied Check 5.5 VA on SMPS board. to IC105 pin3? Is there signal Check IC108 pin23 (P_CTRL). at IC105 pin2? Check IC105 and replace. No 3.3 VA Is the VCC supplied Check 5.5 VA on SMPS board.
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ELECTRICAL TROUBLESHOOTING GUIDE No 12 V Is the VCC supplied Check 14 VA on SMPS board. to IC104 pin2? Is there signal Check IC108 pin23 (P_CTRL). at IC104 pin1? Check IC104 and replace. No 5 V Is the VCC supplied Check 5.5 VA on SMPS board.
ELECTRICAL TROUBLESHOOTING GUIDE 3. SYSTEM PART Power on Check IC103 Stand-by LED 5.5 VA, 3.3 VA and 5.5 VA on SMPS board. IC108: 3.3 VA, Check IC108 / IC102 / IC105 IC102: 1.5 V, IC105 : 3.3 V and SMPS board. X500 Replace X500.
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ELECTRICAL TROUBLESHOOTING GUIDE “LG Logo” IC108: 3.3 VA, Check IC108 / IC102 / IC105 IC102: 5 V, IC105 : 3.3 V display on monitor and SMPS board. X500 27.000 MHz Replace X500. Replace IC503 Signal OK? (SDRAM). Replace IC500 MT1389 or IC102, IC105.
ELECTRICAL TROUBLESHOOTING GUIDE 4. NO HDMI OUTPUT No HDMI audio / video output Check VCC50 IC102. JK501 VCC50 OK? IC108 Check IC108. HDMI_SCL/SDA, EDID_SW, CEC_RX/TX HDMI_RST OK? JK501 pin19 HPD Check hot plug detect signal from TV. about 3.3 V OK? Check IC500 MT1389 VCC Is there signal on pin1, 3, 4, 6, 7, 9, 10, 12?
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM PART (MPEG CRYSTAL 27 MHz) 1) MT1389QE/GH main clock is at 27 MHz (X500) IC500 2) Flash R/W enable signal during download. SF_DI SF_DO 2-47...
5. SERVO OPEN/CLOSE SIGNAL 1) Tray open/close waveform 2) Tray close waveform OPENSW OPENSW CLOSESW CLOSESW OPEN OPEN CLOSE CLOSE 3) Tray open waveform OPENSW CLOSESW OPEN CLOSE 2-50...
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4) Sled control related signal (No disc condition) M-STBY IC400 2-51...
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5) Lens control related signal (No disc condition) IC400 6) Laser power control related signal (No disc condition) IC500 DVDLD CDLD 2-52...
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7) Disc type judgement waveforms IC400 PU_DET IC500 PU_DET 25 : This signal can see using special debug program 2-53...
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IC400 PU_DET IC500 PU_DET 28 : This signal can see using special debug program 2-54...
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8) Focus on waveforms IC500 PU_DET 30 : This signal can see using special debug program PU_DET IC400 2-55...
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9) Spindle control waveforms (No disc condition) SPIND 2-56...
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10) Tracking control related signal (System checking) PU_DET IC500 PU_DET 37 : This signal can see using special debug program PU_DET PU_DET 2-57...
MODIFIED OR ALTERED WITHOUT PERMISSION IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. 1. SMPS CIRCUIT DIAGRAM FROM THE LG CORPORATION. ALL COMPONENTS PERFORMANCE IMPROVEMENT CHANGES INTO SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL THE SET IS NOT DELAYED UNTIL THE NEW SERVICE TO THOSE IN THE ORIGINAL CIRCUIT.
PRINTED CIRCUIT BOARD DIAGRAMS 1. SMPS P. C. BOARD (TOP VIEW) (BOTTOM VIEW) NOTE) Warning Parts that are critical with respect to risk of fire or electrical shock. 2-83 2-84...
EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION NOTES) THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. OPTIONAL PART CABLE3 CABLE2 CABLE1 JACK FRONT MAIN CN901 SMPS...
3. PACKING ACCESSORY SECTION 801 Owner’s manual 808 Battery 823 HDMI cable 811 Video cable 825 FM antenna 900 Remote control 804 Bag 803 Packing 803 Packing 802 Box, Master Speaker cables WIRE80 Front Left WIRE81 Front Right WIRE70 Center WIRE60 Rear Left WIRE61...