SERVICE MANUAL WIDE LCD PANEL TELEVISION YA221 2005 LT-23D50BK MENU BACK TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
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SPECIFICATION Items Contents Dimensions ( W × H × D ) 61.4cm × 48.2cm × 24.0cm [Included stand] 61.4cm × 43.8cm × 7.9cm [TV only] Mass 7.4kg [Included stand] 6.4kg [TV only] Power Input AC100 to AC240 V, 50 Hz Power Consumption 108W (Standby: 3.0W) TV RF System...
SECTION 1 PRECAUTION SAFETY PRECAUTIONS (1) The design of this product contains special hardware and 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.
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INSTALLATION 1.2.1 HEAT DISSIPATION 1.2.3 INSTALLATION REQUIREMENTS If the heat dissipation vent behind this unit is blocked, cooling To ensure safety in an emergency such as an earthquake, and efficiency may deteriorate and temperature inside the unit will to prevent accidents, ensure that measures are taken to prevent rise.
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HANDLING LCD PANEL 1.3.1 PRECAUTIONS FOR TRANSPORTATION 1.3.2 OPTICAL FILTER (ON THE FRONT OF THE LCD PANEL) When transporting the unit, pressure exerted on the internal LCD (1) Avoid placing the unit under direct sunlight over a panel due to improper handling (such as tossing and dropping) prolonged period of time.
SECTION 2 SPECIFIC SERVICE INSTRUCTIONS FEATURES DVB-T (DIGITAL TERRESTRIAL BROADCASTING) ZOOM This TV can receive both Digital terrestrial broadcasting (DVB- This function can change the screen size according to the T) and Analogue terrestrial broadcasting. picture aspect ratio. 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...
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TECHNICAL INFORMATION 2.3.1 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.
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BASIC OPERATION OF SERVICE MODE 2.4.5 SERVICE MODE SETTING ITEMS 2.4.1 HOW TO ENTER THE SERVICE MODE Setting Setting items Contents (1) Press [INFORMATION] key and [MUTING] key on the menu remote control unit simultaneously to enter the SERVICE Adjust Group ---- MODE SCREEN.
SECTION 3 DISASSEMBLY 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. •...
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MAIN PWB MAIN FRAME DISPLAY SUPPORT TUNER BRACKET SCART AV DOOR LCD PANEL UNIT SOCKET BACK COVER HANDLE BUTTON FUNCTION BUTTON FUNCTION PLATE BRACKET FAV SIDE CONTROL CI COVER LED PWB LENS LED LENS IR FAV PWB TFT DOOR SOCKET HEADPHONE MMC CARD BRACKET CI...
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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 3.2.1.2...
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REPLACEMENT OF CHIP COMPONENT 3.3.1 CAUTIONS (1) Avoid heating for more than 3 seconds. (2) Do not rub the electrodes and the resist parts of the pattern. (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.
SECTION 4 ADJUSTMENT This service manual does not describe ADJUSTMENT. SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING. (No.YA221)1-13...
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Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY DISPLAY CATEGORY 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan (No.YA221) Printed in Japan...
PARTS LIST CAUTION The parts identified by the symbol are important for the safety . Whenever replacing these parts, be sure to use specified ones to secure the safety. The parts not indicated in this Parts List and those which are filled with lines --- in the Parts No. columns will not be supplied. P.W.
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Ref.No. Part No. Part Name Description Local VE-20189697 FRONT COVER VE-30026613 SPEAKER (x2) VE-20181315 JVC MARK JVC 47.0 X 375.0(TFT 2324W) VE-30031695 LCD PANEL VE-20184594 REAR COVER VE-20182428 DOOR SOCKET VE-20182430 HANDLE VE-20182443 BACK COVER ...
PRINTED WIRING BOARD PARTS LIST Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local Q700 VE-30001458 TRANSISTOR SMD Q701 VE-30001457 TRANSISTOR SMD VE-30001670 PREAMPLIFIER TFMS5360 Q702 VE-30001457 TRANSISTOR SMD IC100 VE-30017001 IC Q703 VE-30001457 TRANSISTOR SMD IC100 VE-30020865 IC...
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Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C105 VE-30000190 C CAPACITOR 100pF 50V J CH C429 VE-30012581 CAPACITOR SMD 1nF 50V K R C106 VE-30000190 C CAPACITOR 100pF 50V J CH C431 VE-30000315 CAPACITOR SMD 220nF 25V Z...
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Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C754 VE-30012574 CAPACITOR SMD 470pF 50V J C927 VE-30000294 CAPACITOR SMD 100nF 50V K C755 VE-30012574 CAPACITOR SMD 470pF 50V J C928 VE-30000345 E CAPACITOR 10uF 50V M C756 VE-30012581 CAPACITOR SMD...
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Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C1806 VE-30000355 E CAPACITOR 100uF 50V M R168 VE-30012641 RESISTOR SMD 1/16W 10K J C1807 VE-30000352 E CAPACITOR 100uF 16V M R169 VE-30012641 RESISTOR SMD 1/16W 10K J C1817 VE-30016126 CAPACITOR SMD...
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Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R385 VE-30012692 RESISTOR SMD 1/16W 4.7K J R617 VE-30012713 RESISTOR SMD 1/16W 75R J R386 VE-30012506 RESISTOR SMD 1/16W 1.5K J R618 VE-30012982 RESISTOR SMD 1/16W 10R J R387 VE-30012506 RESISTOR SMD...
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Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R787 VE-30012713 RESISTOR SMD 1/16W 75R J R1238 VE-30012713 RESISTOR SMD 1/16W 75R J R788 VE-30000469 RESISTOR SMD 1/10W 1K J 0805 R1239 VE-30012684 RESISTOR SMD 1/16W 330R J R789 VE-30012510 RESISTOR SMD...
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Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local L300 VE-30017542 FIXED COIL SMD 10uH J Q25 155mA L1215 VE-30001968 FERRITE SMD 200R/100MHz 200mA L301 VE-30017542 FIXED COIL SMD 10uH J Q25 155mA L1216 VE-30013412 FERRITE SMD 1.5K/100MHz 500 mA...
For your safety Some DOs and DONTs for you IF IN DOUBT PLEASE CONSULT A COMPETENT ELECTRICIAN. DONT DONT...
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DONT DONT DONT DONT DONT DONT DONT ** Cold cathode fluoresant lamp in LCD PANEL contains a small amount of mercury, please follow local ordinates or regulations for disposal. Warning: This is a Class product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.
WARNING Fingers may be trapped under the TV causing injuries. Hold the TV at the bottom in the middle, and do not allow it to tilt up or down. The TV may fall causing injuries. Hold the bottom of the stand with your hand and tilt the TV up and down.
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Where to install Distance Recommendation...
Getting Started Step 1: Checking the accessories supplied Step 2: Inserting batteries NOTE: Remove the batteries from remote control when it is not to be used for a long period.Otherwise it can be damaged due to any leakage of battery. Old batteries must be disposed in a designated area.
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ph qÃpxr r vhy Step 4: Connecting an aerial VCR and mains rpÃurÃhr vhy (5, / 68Ãhqh r Ã98ÃDI...
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rpÃhÃvqrÃqrvpr (5, / ;7 ;7 68Ãhqhr Ã98ÃDI 9&5 Step 5: Using the cable holder...
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Step 6: Switching the TV ON/OFF SÃGvÃ@ÃTh ÃhhvpÃrh pu ÃD HINT: Depending on the reception conditions in your par- ticular area, you may find that the list of channels found includes one or more repeated names. This is because the receiver may detect and store some channels, including those it cannot receive clearly, from adjacent areas along- side the strong channels from a transmitter nearby.
EVERYDAY OPERATION Hint: The channel list numbers are assigned by the broadcasters. Because not all channels are broadcast free-to-air and stored by the receiver, the channel list numbers do not run continuously. The fifteenth channel in the list, for example, may not be channel number 15 but channel number 17.
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WARNING : Do not turn off the main power. The timer function will not work with the main power switched off. When recording on a T-V LINK compatible VCR: When recording on a T-V LINK incompatible VCR:...
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Cancelling the timer setting Reactivating the cancelled timer setting Configuration...
rÃà rÃÃhÃÃqryrrÃhyyÃpuhryà hqÃrvtÃs Ãsv ÃvrÃvhyyhv4 `r I Common Interface Hint The bar graphs of signal quality and signal level give a good indication of whether any channels are likely to be found. If only the signal level graph shows a high value then it is likely that an analogue channel occu- pies that broadcast frequency.
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Setting The TV Menu System MAIN MENU Picture Menu...
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Note 1: At low signal level, the changings on the Noise Reduction function are not effective when there is menu on the screen. If the menu is removed, the effect of this function is seen. At normal broadcasting, Noise Reduction changings are effective at once.
Program Menu Caution: Using Delete or Insert function rewrite the current channel list in the Program menu. Therefore, the programme numbers of some of channels will change.
Other Features TV Status Sound Indicator Source Menu WHUHR hyÃD hyÃDD Hyper Sound T pr ) UW 9DBDU 6G @YU @YU! @YU! T @YU" Mute Indicator @YU# @YU# T...
No-Signal and Out Of Range Detection (PC mode) Analogue Teletext Source Menu T pr ) Q8 9DBDU 6G @YU @YU! @YU! T @YU" @YU# To operate Teletext @YU# T Sound in PC mode PQÃH@IV...
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To select a page of Teletext To Stop Automatic Page Change To Select a Subcode Page To Select Index Page Searching for a teletext page while watching TV To Select Double Height Text To exit Teletext Fastext and Toptext To Reveal concealed Information...
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Peripheral Equipment Connections Via the Euroconnector T-V LINK compatible VCR RGB mode EXT-2 S Mode...
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TV and Video Recoder (VCR) Via the RCA jacks NTSC Playback Via the ANT (aerial) socket Camera and Camcorder Decoder Connect the decoder to the video recorder Connecting Headphones...
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Connecting the PC To connect to S-Video input...
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PC Picture Tips Can not turn the TV on? Sound Can not turn the TV off? Care of the Screen Remote Control Colours of image on screen are abnormal No solution Bad picture (in digital mode) No Image on Display Screen...
Specifications Model Item LT-17D50BK Broadcasting Systems PAL BG, DK, I Channels and Digital : 474 MHz - 858 MHz Frequencies Analogue : 46.25 MHz - 862.25 MHz Cable TV (S1-S20/ S21-S41) Input Signal Video: Analog 0,7 Vp-p 75 ohm positive Sync: TTL Level positive or negative, Seperate sync.
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Specifications Model Item LT-23D50BK Broadcasting Systems PAL BG, DK, I Channels and Digital : 474 MHz - 858 MHz Frequencies Analogue : 46.25 MHz - 862.25 MHz Cable TV (S1-S20/ S21-S41) Input Signal Video: Analog 0,7 Vp-p 75 ohm positive Sync: TTL Level positive or negative, Seperate sync.
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Corrections Factory settings: The following corrections are made on the related pages. To reset the TV, highlight the Factory Set- tings line in the menu and press OK. A warning screen is displayed in case of acci- Page 25: dental operation. You can either perform a First Time Installa- tion, effectively resetting the receiver to its rÃÃ rÃÃhÃÃqryrrÃurÃQSÃyvÃ...
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LT-23D50BK STANDARD CIRCUIT DIAGRAM NOTE ON USING CIRCUIT DIAGRAMS 1.SAFETY Type No indication : Ceramic capacitor The components identified by the symbol and shading are : Metalized mylar capacitor critical for safety. For continued safety replace safety ciritical : Polypropylene capacitor components only with manufactures recommended parts.
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CONTENTS SEMICONDUCTOR SHAPES ..............2-2 BLOCK DIAGRAM ..................2-3 CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM ........................ 2-5 SIDE CONTROL PWB CIRCUIT DIAGRAM ..................... 2-29 LED PWB CIRCUIT DIAGRAM ......................... 2-29 AV JACK PWB CIRCUIT DIAGRAM ......................2-30 HEADPHONE JACK PWB CIRCUIT DIAGRAM ..................2-30 PATTERN DIAGRAMS MAIN PWB PATTERN ..........................
BLOCK DIAGRAM TFT-LCD PANEL SIDE AV S-VIDEO IN SDRAM CVBS IN 2MX32bits AUDIO AMPLIFIER LVDS TDA3002D2 DS90C385MTD MSTAR S-VIDEO CVBS MAIN OUT LR IN LR R (0-7) B (0-7) G (0-7) SCALER V SYNC SC1_OUT_LR H SYNC SC2_OUT_LR DENTERLACER LINE OUT LR GM6015 SC1_IN_LR AUDIO PROCESSOR...
CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM (1/12) MAIN PWB ASS'Y (1/12) VE-20184629 (No.YA221)2-5 2-6(No.YA221)
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MAIN PWB CIRCUIT DIAGRAM (2/12) MAIN PWB ASS'Y (2/12) NOTE : Refer to the part list for the part number of IC302. VE-20184629 (No.YA221)2-7 2-8(No.YA221)
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MAIN PWB CIRCUIT DIAGRAM (3/12) MAIN PWB ASS'Y (3/12) VE-20184629 (No.YA221)2-9 2-10(No.YA221)
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MAIN PWB CIRCUIT DIAGRAM (4/12) MAIN PWB ASS'Y (4/12) VE-20184629 (No.YA221)2-11 2-12(No.YA221)
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MAIN PWB CIRCUIT DIAGRAM (5/12) MAIN PWB ASS'Y (5/12) VE-20184629 (No.YA221)2-13 2-14(No.YA221)
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MAIN PWB CIRCUIT DIAGRAM (6/12) MAIN PWB ASS'Y (6/12) VE-20184629 (No.YA221)2-15 2-16(No.YA221)
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MAIN PWB CIRCUIT DIAGRAM (7/12) MAIN PWB ASS'Y (7/12) VE-20184629 (No.YA221)2-17 2-18(No.YA221)
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MAIN PWB CIRCUIT DIAGRAM (8/12) MAIN PWB ASS'Y (8/12) VE-20184629 (No.YA221)2-19 2-20(No.YA221)
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MAIN PWB CIRCUIT DIAGRAM (9/12) MAIN PWB ASS'Y (9/12) VE-20184629 (No.YA221)2-21 2-22(No.YA221)
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MAIN PWB CIRCUIT DIAGRAM (10/12) MAIN PWB ASS'Y (10/12) VE-20184629 (No.YA221)2-23 2-24(No.YA221)
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MAIN PWB CIRCUIT DIAGRAM (11/12) MAIN PWB ASS'Y (11/12) VE-20184629 (No.YA221)2-25 2-26(No.YA221)
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MAIN PWB CIRCUIT DIAGRAM (12/12) MAIN PWB ASS'Y (12/12) VE-20184629 (No.YA221)2-27 2-28(No.YA221)
SIDE CONTROL PWB CIRCUIT DIAGRAM AV JACK PWB CIRCUIT DIAGRAM MENU VOL+ VOL- SIDE CONTROL PWB ASS'Y VE-20174624 AV JACK PWB ASS'Y VE-20177847 LED PWB CIRCUIT DIAGRAM HEADPHONE JACK PWB CIRCUIT DIAGRAM HP_R HP_L HEADPHONE JACK PWB ASS'Y 100R VE-20177874 HEAD_PHONE C100 C101...
LED PWB PATTERN HEADPHONE JACK PWB PATTERN [SOLDER SIDE] HEADPHONE JACK PWB PATTERN [PARTS SIDE] 2-36(No.YA221)
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Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY DISPLAY CATEGORY 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan (No.YA221) Printed in Japan...
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