SERVICE MANUAL
Contents
1. 3 AUDIO bance OSS Dynamic bass 1 14 No YA232 3 2 1 2 REMOTE CONTROL DIRECT OPERATION Setting item Setting position ZOOM AUTO 4 OPTIONS Setting item Setting position sleep timer 3 3 REPLACEMENT OF CHIP COMPONENT 3 3 1 CAUTIONS 1 Avoid heating for more than 3 seconds Do not rub the electrodes and the resist parts of the pattern 2 3 When removing a chip part melt the solder adequately 4 Do not reuse a chip part after removing it 3 3 2 SOLDERING IRON 1 Use a high insulation soldering iron with a thin pointed end of it 2 A 30w soldering iron is recommended for easily removing parts 3 3 3 REPLACEMENT STEPS 1 How to remove Chip parts Resistors capacitors etc 1 As shown in the figure push the part with tweezers and alternately melt the solder at each end 2 Shift with the tweezers and remove the chip part Transistors diodes variable resistors etc 1 Apply extra solder to each lead vn 2 As shown in the figure push the part with tweezers and alternately melt the solder at each lead Shift and remove the chip part E vr NOTE After removing the part remove remaining solder from the pattern 2 How to install Chip parts Resistors capacitors etc 1 Apply solder to the pattern as indicated in the figure af 2 Grasp the chip part with tweezers and place it on the solder Then heat a2. 1 6 No YA232 2 4 TECHNICAL INFORMATION 2 4 4 LCD PANEL This unit uses the flat type panel LCD Liquid Crystal Display panel that occupies as little space as possible instead of the conventional CRT Cathode Ray Tube as a display unit Since the unit has the two polarizing filter that are at right angles to each other the unit adopts normally black mode where light does not pass through the polarizing filter and the screen is black when no voltage is applied to the liquid crystals 2 4 1 1 SPECIFICATIONS The following table shows the specifications of this unit Displayed colour 16777216 colours 256 colours for R G and B Responsetme ms 4 2 4 1 2 PIXEL FAULT There are three pixel faults bright fault dark fault and flicker fault that are respectively defined as follows E BRIGHT FAULT In this pixel fault a cell that should not light originally is lighting on and off For checking this pixel fault input ALL BLACK SCREEN and find out the cell that is lighting on and off DARK FAULT In this pixel fault a cell that should light originally is not lighting or lighting with the brightness twice as brighter as originally lighting For checking this pixel fault input 10096 of each R G B colour and find out the cell that is not lighting B FLICKER FAULT In the pixel fault a cell that should light originally or not light originally is flashing on and off For checking this pixel fault input ALL BLACK SCREEN signal or
3. 100 of each RGB colour and find out the cell that is flashing on and off No YA232 1 7 2 5 BASIC OPERATION OF SERVICE MODE 2 5 1 HOW TO ENTER THE SERVICE MODE 1 Press MENU key on the remote control unit simultaneously to display the MENU SCREEN 2 In the MENU SCREEN press the 4 7 2 and 5 key 3 The following menu appears on the screen SERVICE MODE SCREEN se display backlight on time Vestel V1 0 10 Release Build scart prescale A ee EN nicam prescale down to change display settings 1 8 No YA232 2 5 2 HOWTO EXIT THE SERVICE MODE Press the MENU key to exit the Service mode 2 5 3 CHANGE AND MEMORY OF SETTING VALUE SELECTION OF SETTING MENU amp ITEM e FUNCTION 4 key Select the SETTING MENU amp ITEM OK key Decision the SETTING MENU amp ITEM CHANGE OF SETTING VALUE DATA e FUNCTION lt gt key E MEMORY OF SETTING VALUE DATA The setting value will be stored automatically when release the REMOTE CONTROL UNIT keys 2 5 4 SERVICE MODE SELECT KEY LOCATION oe e 4 9 7 8 9 000 E gt T P4 DK 4 FUNCTION lt gt S 2 FUNCTION 2 v N 2 5 5 SERVICE MODE SETTING ITEMS Setting menu Se ngiems _Varabieange Setting value 5500K 6500K 7500K 9300K user 5500K 6500K 7500K 9300K auto ntsc pal secam ntsc RGB YPbPr SMPTE240 YPbPr REC709 YC
4. Design amp specifications are subject to change without notice 1 2 No YA232 SECTION 1 PRECAUTION SAFETY PRECAUTIONS 1 The design of this product contains special hardware many circuits and components specially for safety purposes For continued protection no changes should be made to the original design unless authorized in writing by the manufacturer Replacement parts must be identical to those used in the original circuits Service should be performed by qualified personnel only 2 Alterations of the design or circuitry of the products should not be made Any design alterations or additions will void the manufacturer s warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom 3 Many electrical and mechanical parts in the products have special safety related characteristics These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage wattage etc Replacement parts which have these special safety characteristics are identified in the parts list of Service manual Electrical components having such features are identified by shading on the schematics and by A on the parts list in Service manual The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement p
5. when the unit is carefully packed To prevent accidents from occurring during transportation pay careful attention before delivery such as through explaining the handling instructions to transporters Ensure that the following requirements are met during transportation as the LCD panel of this unit is made of glass and therefore fragile 1 USE A SPECIAL PACKING CASE FOR THE LCD PANEL When transporting the LCD panel of the unit use a special packing case packing materials A special packing case is used when a LCD panel is supplied as a service spare part 2 ATTACH PROTECTION SHEET TO THE FRONT Since the front display part of the panel is vulnerable attach the protection sheet to the front of the LCD panel before transportation Protection sheet is used when a LCD panel is supplied as a service spare part 3 AVOID VIBRATIONS AND IMPACTS The unit may be broken if it is toppled sideways even when properly packed Continuous vibration may shift the gap of the panel and the unit may not be able to display images properly Ensure that the unit is carried by at least 2 persons and pay careful attention not to exert any vibration or impact on it 4 DO NOT PLACE EQUIPMENT HORIZONTALLY Ensure that it is placed upright and not horizontally during transportation and storage as the LCD panel is very vulnerable to lateral impacts and may break During transportation ensure that the unit is loaded along the traveling direction of the veh
6. JVL SERVICE MANUAL WIDE LCD PANEL TELEVISION LT 30E45SU 30 455 LT 30E45SUz LT 30E45SUn 7 InteriArt 9 8 s TABLE OF CONTENTS 1 PRECAUTION 221 ua 09869788 ae does 1 3 2 SPECIFIC SERVICE 5 1 6 DISASSEMBLY siones ess Pci o d d D QUE NR ee SUR Ned a ai 1 10 4 ADJUSTMENT seais us Rosi Rc a ened RR a sa RR a i dolia OR 1 16 5 TROUBLESHOOTING sois faced da eked a he CLE Br ACC ERR 1 16 COPYRIGHT 2005 Victor Company of Japan Limited No YA232 2005 8 SPECIFICATION ens Tes Dimensions WxHxD 84 cm x 52 2cm x 26 0cm Included stand 84 cm x 49 0cm x 10 2cm TV only Mass 14 8kg Included stand 13 0kg TV only Power Input AC100 to AC240 V 50 Hz Power Consumption 150W Standby 4 0W TV RF System CCIR B G I D K L Colour System PAL SECAM NTSC 3 58 NTSC 4 43 NTSC EXT only Stereo System A2 B G D K NICAM B G I D K L Teletext System FLOF Fastext TOP WST World Standard System Receiving Frequency VHF 47MHz to 470MHz UHF 470MHz to 862MHz CATV 116MHz to 172MHz 220MHz to 469MHz Intermediate Frequency VIF 38 9MHz B G D K SIF 33 4MHz 5 5MHz B G 32 9MHz 6 0MHz 1 32 4MHz 6 5MHz L D K Colour Sub Carrier PAL 4 43MHz Frequency SECAM 4 40625MHz 4 25MHz NTSC 3 58 2 4 43MH
7. art shown in the parts list of Service manual may cause shock fire or other hazards 4 Don t short between the LIVE side ground and ISOLATED NEUTRAL side ground or EARTH side ground when repairing Some model s power circuit is partly different in the GND The difference of the GND is shown by the LIVE L side GND the ISOLATED NEUTRAL side GND and EARTH side GND Don t short between the LIVE side GND and ISOLATED NEUTRAL side GND or EARTH side GND and never measure the LIVE side GND and ISOLATED NEUTRAL side GND or EARTH side GND at the same time with a measuring apparatus oscilloscope etc If above note will not be kept a fuse or any parts will be broken 5 When service is required observe the original lead dress Extra precaution should be given to assure correct lead dress in the high voltage circuit area Where a short circuit has occurred those components that indicate evidence of overheating should be replaced Always use the manufacturer s replacement components 6 Isolation Check Safety for Electrical Shock Hazard After re assembling the product always perform an isolation check on the exposed metal parts of the cabinet antenna terminals video audio input and output terminals Control knobs metal cabinet screw heads earphone jack control shafts etc to be sure the product is safe to operate without danger of electrical shock a Dielectric Strength Test The isolation b
8. ath to avoid causing scratches to the front filter surface No YA232 1 5 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS 2 1 FEATURES T V LINK OFF TIMER When you have a T V LINK compatible VCR connected to the This function can set the TV to automatically turn off after a set EXT 2 Terminal on the TV it is easier to set up the VCR and to time COLOUR SYSTEM ZOOM If the picture is not clear or no colour appears change the This function can change the screen size according to the current colour system to another colour system picture aspect ratio 2 2 MAIN DIFFERENCE LIST items LT 30E45SU LT 30E45SJ LT 30E45SU Z LT 30E45SU N POWER CORD EU type 2 pin UK type 3 pin SWE Type 3 pin EU type 2 pin 2 3 21 PIN EURO CONNECTOR SCART EXT 1 EXT 2 Pin No Signal designation Matchingvaue EA EX AUDIO R output 500mVrms Nominal Low impedance 500mV rms Nominal High impedance Used R2 Tr se TOO Vig uy 750 FUNCTION SW Low OV 3V Used Used 0 rr ooo MP 9 set seg 10 Notued TESTA AS 4 ga O TIN IC exu O CN C 300mV p py 752 Ud AdUmd lUwd C cowwNGND Cie e P P Peak to Peak B W Blanking to white peak Pin assignment 20 18 16 14 12 10 8 6 4 2 FUUUOUUUUUUU 2 19 17 15 13 11 9 7 5
9. bCr REC601 none solid color vert bars subwoofer level O 5 Oo e 3 3 i i 51915 AE eh ala 1010 o sIo 3 o 5 O LO I I l O gt wl wl y a calibration color temperature color temperature user color components all red green blue solid field level on off on off 0 255 0 255 on off deinterlacer black expansion These values are notrecorded for this reasonthey are adjust ed to aspecified value luminance peaking on off 0 1 2 3 on off lt O off nr threshold low high 0 255 0 1 2 0 255 0 255 noise reduction o o a oO TJ Q o O A O lt O DZ L o o No YA232 1 9 SECTION 3 DISASSEMBLY 3 1 DISASSEMBLY PROCEDURE NOTE Make sure that the power cord is disconnected from the outlet Pay special attention not to break or damage the parts When removing each board remove the connectors as required Taking notes of the connecting points connector numbers makes service procedure manageable e Make sure that there is no bent or stain on the connectors before inserting and firmly insert the connectors 3 1 1 REMOVING THE STAND Fig 1 1 Remove the 4 screws A then remove the STAND 3 1 2 REMOVING THE REAR COVER Fig 1 e Remove the STAND 1 Remove the 12 screws B and 4 sc
10. etween the AC primary circuit and all metal parts exposed to the user particularly any exposed metal part having a return path to the chassis should withstand a voltage of 3000V AC r m s for a period of one second Withstand a voltage of 1100V AC r m s to an appliance rated up to 120V and 3000V AC r m s to an appliance rated 200V or more for a period of one second This method of test requires a test equipment not generally found in the service trade b Leakage Current Check Plug the AC line cord directly into the AC outlet do not use a line isolation transformer during this check Using a Leakage Current Tester measure the leakage current from each exposed metal part of the cabinet particularly any exposed metal part having a return path to the chassis to a known good earth ground water pipe etc Any leakage current must not exceed 0 5mA AC r m s However in tropical area this must not exceed 0 2mA AC r m s Alternate Check Method Plug the AC line cord directly into the AC outlet do not use a line isolation transformer during this check Use an AC voltmeter having 100092 per volt or more sensitivity in the following manner Connect a 150042 10W resistor paralleled by a 0 15UF AC type capacitor between an exposed metal part and a known good earth ground water pipe etc Measure the AC voltage across the resistor with the AC voltmeter Move the resistor connection to each exposed metal part part
11. icle and avoid stacking them on one another For storage ensure that they are stacked in 2 layers or less even when placed upright 1 3 2 OPTICAL FILTER ON THE FRONT OF THE LCD PANEL 1 Avoid placing the unit under direct sunlight over a prolonged period of time This may cause the optical filter to deteriorate in quality and COLOUR 2 Clean the filter surface by wiping it softly and lightly with a soft and lightly fuzz cloth such as outing flannel 3 Do not use solvents such as benzene or thinner to wipe the filter surface This may cause the filter to deteriorate in quality or the coating on the surface to come off When cleaning the filter usually use the neutral detergent diluted with water When cleaning the dirty filter use water diluted ethanol 4 Since the filter surface is fragile do not scratch or hit it with hard materials Be careful enough not to touch the front surface especially when taking the unit out of the packing case or during transportation 1 3 3 PRECAUTIONS FOR REPLACEMENT OF EXTERIOR PARTS Take note of the following when replacing exterior parts REAR COVER FRONT PANEL etc 1 Do not exert pressure on the front of the LCD panel filter surface It may cause irregular COLOUR 2 Pay careful attention not to scratch or stain the front of the LCD panel filter surface with hands 3 When replacing exterior parts the front LCD panel should be placed facing downward Place a mat etc underne
12. icularly any exposed metal part having a return path to the chassis and measure the AC voltage across the resistor Now reverse the plug in the AC outlet and repeat each measurement Any voltage measured must not exceed 0 75V AC r m s This corresponds to 0 5mA AC r m s However in tropical area this must not exceed 0 3V AC r m s This corresponds to 0 2mA AC r m s AC VOLTMETER HAVING 1000Q V OR MORE SENSITIVITY 0 154F AC TYPE PLACE THIS PROBE ON EACH EXPOSED ON METAL PART GOOD EARTH GROUND No YA232 1 3 1 2 INSTALLATION 1 2 1 HEAT DISSIPATION If the heat dissipation vent behind this unit is blocked cooling efficiency may deteriorate and temperature inside the unit will rise The temperature sensor that protects the unit will be activated when internal temperature exceeds the pre determined level and power will be turned off automatically Therefore please make sure pay attention not to block the heat dissipation vent as well as the ventilation outlet behind the unit and ensure that there is room for ventilation around it Ventilation hole Diagram differs from actual appearance 1 2 2 INSTALLATION REQUIREMENTS Ensure that the minimal distance is maintained as specified below between the unit with and the surrounding walls as well as the floor etc Install the unit on stable flooring or stands Take precautionary measures to pre
13. nd melt the solder at both ends of the chip part Transistors diodes variable resistors etc 1 Apply solder to the pattern as indicated in the figure 2 Grasp the chip part with tweezers and place it on the solder 3 First solder lead A as indicated in the figure A B C 4 Then solder leads B and C A B C No YA232 1 15 1 16 No YA232 SECTION 4 ADJUSTMENT This service manual does not describe ADJUSTMENT SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING JVC Victor Company of Japan Limited AV amp MULTIMEDIA COMPANY DISPLAY CATEGORY 12 3 chome Moriya cho Kanagawa ku Yokohama city Kanagawa prefecture 221 8528 Japan No YA232 Ve Printed in Japan VPT
14. rews C then remove the REAR COVER 3 1 3 REMOVING THE MAIN PWB Fig 1 e Remove the STAND e Remove the REAR COVER 1 Remove the 4 screws D then remove the RIGHT FRAME 2 Remove the 4 screws E then remove the LEFT FRAME 3 Remove the 2 screws W then remove the TERMINAL BASE 4 Remove the 8 screws F and 2 screws G then remove the MAIN PWB 3 1 4 REMOVING THE POWER PWB Fig 1 e Remove the STAND e Remove the REAR COVER 1 Remove the 4 screws H then remove the POWER PWB 3 1 5 REMOVING THE POWER UNIT Fig 1 e Remove the STAND e Remove the REAR COVER 1 Remove the 4 screws J then remove the POWER UNIT 3 1 6 REMOVING THE CONTROL BOTTON PWB Fig 1 e Remove the STAND e Remove the REAR COVER 1 Remove the 3 screws K then remove the CONTROL BOTTON PWB 1 10 No YA232 3 1 7 REMOVING THE FAV PWB Fig 1 e Remove the STAND Remove the REAR COVER 1 Remove the 2 screws L then remove the CONTROL BASE with FAV PWB 2 Remove the 2 screws M then remove the FAV PWB from the CONTROL BASE 3 1 8 REMOVING THE AMPLIFIRE PWB Fig 1 e Remove the STAND e Remove the REAR COVER 1 Remove the 4 screws N then remove the AMPLIFIRE PWB 3 1 9 REMOVING THE NOISE FILTER PWB Fig 1 e Remove the STAND Remove the REAR COVER 1 Remove the 3 screws P 2 screws R and 1 screw Q then remove the NOISE FILTER PWB 3 1 10 REMOVING THE LED PWB Fig 1 e Remove the STAND e Remo
15. ve the REAR COVER 1 Remove the 2 screws T then remove the LED PWB REAR COVER AMPLIFIER PWB MAIN PWB N CONTRO BASE Fig 1 No YA232 1 11 3 1 11 REMOVING THE SPEAKER Fig 2 e Remove the STAND Remove the REAR COVER 1 Remove the 4 screws A then remove the SPEAKER with SPEAKER BASE 2 Remove the 4 screws B then remove the SUB SPEAKER L R 3 Remove the 8 screws C then remove the SPEAKER from the SPEAKER BASE 3 1 12 REMOVING THE LCD PANEL UNIT Fig 2 e Remove the STAND e Remove the REAR COVER 1 Remove the 4 screws D and the 12 screws E then remove the LCD PANEL UNIT with the MAIN BASE 2 Remove the 4 screws F then remove the MAIN BASE from the LCD PANEL UNIT NOTE Pay special attention not to break or damage on the LCD PANEL face or frame The LCD PANEL UNIT is fixed to the FRONT COVER at the back side by using double side adhesive tapes To remove the LCD PANEL UNIT remove the adhesive tape on the FRONT PANELslowly 1 12 No YA232 3 2 MEMORY IC REPLACEMENT This model uses the memory IC This memory IC stores data for proper operation of the video and drive circuits When replacing be sure to use an IC containing this initial value data 3 2 1 SETTINGS OF FACTORY SHIPMENT 3 2 1 1 BUTTON OPERATION 3 2 1 3 REMOTE CONTROL MENU OPERATION 1 PICTURE ow RN phase PC signal input only 2 WINDOW pip size pip selected only
16. vent the unit from tipping in order to protect against accidents and earthquakes Diagram differs from actual appearance 1 4 No YA232 1 2 3 INSTALLATION REQUIREMENTS To ensure safety in an emergency such as an earthquake and to prevent accidents ensure that measures are taken to prevent the TV dropping or falling over Use the supplied screws to firmly attach the supplied hooks OPTION to the back of the TV and use commercially available cord to fix the TV to rigid components such as walls and columns The hook for fall prevention option It fixes in a band TV Stand Diagram differs from actual appearance 1 2 4 NOTES ON HANDLING 1 WHEN TAKING UNIT OUT OF A PACKING CASE When taking the unit out of a packing case do not grasp the upper part of the unit If you take the unit out while grasping the upper part the LCD PANEL may be damaged because of a pressure Instead of grasping the upper part put your hands on the lower backside or sides of the unit 2 AS FOR PRESSING OR TOUCHING A SPEAKER Be careful not to press the opening of the speaker in the lower part of the unit and around them since the decorative sheet on the surface of the openings may be deformed 1 3 HANDLING LCD PANEL 1 3 1 PRECAUTIONS FOR TRANSPORTATION When transporting the unit pressure exerted on the internal LCD panel due to improper handling Such as tossing and dropping may cause damages even
17. z LCD panel 30V inch wide aspect 15 9 Screen Size Diagonal 51 1cm H 64 3cm x V 38 6cm Display Pixels Horizontal 1280 dots x Vertical 768 dots WXGA Audio Power Output SW 8W 10 THD Speaker 5 0cm round type x 2 Aerial terminal VHF UHF F type connector 75Q unbalanced coaxial EXT 1 EXT 2 Input Output 21 pin Euro connector SCART socket x 2 EXT 3 Input Component Video RCA pin jack x 625p 525p 625i 525i Y 1V Positive Negative sync provided 75 Q Cb Cr 0 7V p p 75 Q Audio 500mV rms AdBs high impedance RCA pin jack x 2 EXT 4 Input S Video Mini DIN 4 pin x 1 Y 1V p p Positive Negative sync provided 75 Q C 0 286V p p Burst signal 75 Q Video 1V Positive Negative sync provided 75 RCA pin jack x 1 Audio 500mV rms High impedance RCA pin jack x 2 PC RGB Input D sub 15pin x 1 R G B 0 7V 750 HD VD 1V p p to 5V p p high impedance lt Available signal gt VGA 640 pixels x 480 pixels Horizontal 31 5kHz Vertical GOHz XGA 1024 pixels x 768 pixels Horizontal 48 4kHz Vertical GOHz PC AUDIO input 3 5mm stereo mini jack x 1 Audio output 500mV rms Low impedance RCA pin jack x 2 Subwoofer output More than 0 to 1000mV rms 2 2dBs low impedance 80Hz when modulated 100 RCA pin jack x 1 Headphone 3 5mm stereo mini jack x 1 Remote Control Unit RM C1860 AA R6 dry cell battery x 2
Download Pdf Manuals
Related Search