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Related Manuals for Tatung V23CLTT
Summary of Contents for Tatung V23CLTT
- Page 1 V23CLTT/V27CMTT/V30CMTT LCD-TV Service Manual Date: Aug 10, 2004 Ver. : 1.0...
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Page 2: Table Of Contents
Table of contents 1. Precautions & Notice........………………….3 2. Features & Specifications..........………….5 3. Connection & Applications……………………..……………..9 4. Controls Location .................11 5. Remote Control..........…….……….…..12 6. Disassembly Instructions.......…………………..……14 7. Block Diagram............……..…………19 8. Troubleshooting Flow Chart..........……..20 9. Electronic Circuit Description..........…23 10. Circuit Diagram............…………….27 11. PCB Layout............…………………46 12. -
Page 3: Precautions & Notice
1. Precautions & Notice 1.1 Safety Precautions 1) Cleaning: Unplug the power cord from the AC outlet before cleaning the product. Use a damp cloth to clean the product. Do not use liquid cleaners or aerosol cleaners. 2) Heat sources: Keep the product away from heat sources such as radiators, heaters, stoves and other heat-generating products (including amplifiers). - Page 4 circuits as contact with them might be fatal. 6) Ventilation-The vents and other openings in the cabinet are designed for ventilation. Do not cover or block these vents and openings since insufficient ventilation can cause overheating and/or shorten the life of the product. Do not place the product on a bed, sofa, rug or other similar surface, since they can block ventilation opening.
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Page 5: Features & Specifications
Specifications Specification V23CLTT ITEMS SPECIFICATION Screen size 23” wide TFT-LCD panel Aspect Ratio 15：9 1280 x 768 (WXGA) Resolution Display Contrast ratio 400:1(typ) Brightness 450cd/m (typ) Viewing Angle Over 170∘(Hor.) / 170∘(Vert.) Chinese , English, French , German , Spanish... - Page 6 Accessories Remote Control, Batteries, AC cord, 15 Pin D-Sub Signal Cable V27CMTT ITEMS SPECIFICATION 27＂wide TFT-LCD panel Screen size Aspect Ratio 16：9 1280 x 720(WXGA) Resolution Display Contrast ratio 500:1 (typ) Brightness 500cd/m (Typ) Over 170∘(Hor.) / 170∘(Vert.) Viewing Angle Chinese, English, French, German, Spanish OSD Language TV standard (CCIR)
- Page 7 V30CMTT ITEMS SPECIFICATION 29.6＂wide TFT-LCD panel Screen size Aspect Ratio 15：9 1280 x 768 (WXGA) Resolution Display Contrast ratio 500:1(typ) Brightness 500cd/m (Typ) Over 170∘(Hor.) / 170∘(Vert.) Viewing Angle OSD Language Chinese , English, French , German , Spanish TV standard (CCIR) NTSC TV Turning system PLL 181 Ch.
- Page 8 PC I/P Preset Timing Pixel Mode Name H.Freq. (kHz) H. Polarity Mode NO. Resolution V.Freq. (Hz) V. Polarity (MHZ) ＋ VGA 70Hz 31.469 25.175 － 640X350 70.087 － VGA 60Hz 31.469 25.175 － 640X480 59.941 － VGA 72Hz 37.861 31.5 －...
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Page 9: Connection & Applications
3. Connection & Applications... - Page 10 Note: Audio out: The level of Audio O/P is constant. It won’t be affected by aligning volume, treble and bass. This connecter should be connected to outer audio amplifier to enlarge the volume. Video O/P: When user wants to connect Audio and Video O/P of our LCD-TV to VCR for recording program, the O/P has only one choice that is TV mode.
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Page 11: Controls Location
4. Control Location These buttons control your TV’s basic features, include the on-screen mean. To use the more advanced features, you must the remote control. POWER: turn on or turn off the LCD TV. SOURCE: set up the input source (PC,VIDEO,SV,TV,CV). MENU: display the main menu. -
Page 12: Remote Control
5. Remote Control The remote control pad works almost as same as ordinary TV remote control that includes the basic function needed while viewing a live video: Sleep Power Number Buttons Return Channel UP Mute SWAP MENU/Enter VOL－ VOL+ TITLE / EXIT Reset Channel DOWN Subwoofer... - Page 13 Summary of Control Button Press POWER button Direct to turn on or turn off the display Selecting the signal source Press TV button Direct to switch to the TV mode. Press AV button Direct to switch to the AV Video mode. Press SV button Direct to S-Video mode.
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Page 14: Disassembly Instructions
6. Disassembly Instructions 1. Face down the LCD-TV : Face down the LCD-TV on a smooth plane with a soft material to protect the panel faceplate. 2. Base Neck Removal Procedure : Remove 2 screws from Neck Cover. (Indicated as “ A “) Then you could take the Back Cover of neck apart from the LCD-TV 3. - Page 15 4. Tuner Cover & AV Cover Removal Procedure: 4.1 Remove Tuner Cover. (Indicated as “D”) 4.2 Remove AV Cover before, you should be loose the screw (Indicated as “E”) 5. Back Cover Removal Procedure: 5.1 Remove 8 screws from the Back Cover. ( Indicated as “ F “and “ G “ ) 5.2 Remove a screw from the Tuner Board.
- Page 16 6. . Right/Left Side Covers and Tuner Board Removal Procedure: 6.1 Remove 4 screws from Slide of AV PCB & left side Covers. (Indicated as “ H ”) 6.2 Remove a screw from the Tuner Board. (Indicated as “ I ”) 6.3 Remove 3 screws from the power case assembly.
- Page 17 8. Main PCB Removal procedure: 8-1 Remove 9 screws from the Main PCB. (indicated “ L “) Then you could take Main PCB apart from the LCD-TV . 9. Panel Bracket Removal procedure: 9-1 Remove 4 screws from the Panel Bracket. (Indicated as “ M ”) Then you could take Panel Bracket apart from the Front Cover.
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Page 19: Block Diagram
Block Diagram UT01 I044 10W + 10W I010 TV – Tuner Audio Amp. Speaker (Philips) Audio MTS & Audio Processor LA4282 Video FQ1236 MK3 MSP3440G Headphone (or TFA9843) CV Audio Subwoofer SV/AV Audio PC Audio I019 Interlaced I018 Video Decoder SAA7118 8 bit Port V(Sub) -
Page 20: Troubleshooting Flow Chart
Troubleshooting Flow Chart （1）Power Start NG No picture Appear Replace I029 0~0.5V Restart and check Re-ch sources are 否 arge Does the LED Is the Voltage at Measure of I029 connected 否 Picture light up？ L067 5V？ volt No picture appears 3~5V Re-ch... - Page 21 (2) Picture abnormal The Ver. Or Hor. Sync. does not hold in any source 否 Are the cables Check side SMD of Connect the Clean attached I019&I020 is welded cables firmly EEPROM, and firmly at the correctly? with the at LCD Panel then check the interface...
- Page 22 Steps to clean EEPROM 1. Press Power key to turn off the LCD-TV. 2. Press Power key quickly to turn on the LCD-TV and then press the Aspect Ratio key promptly. 3. When “Initial EEPROM” appears on the screen, on the Clean EEPROM is complete. Trouble Shooting 1.
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Page 23: Electronic Circuit Description
9. Electronic Circuit Description 9.1 Main Board Circuit (1) PC signal Refer to circuit diagram sheet 1 of PWB-0610. The analog R.G.B video input signals are supplied through the 15Pin D-sub cable which is terminated at PJ03. These three input signals are approximately 0.7Vpp in amplitude. - Page 24 (2) AV Signal Refer to the page 8 in circuit diagram of PWB-0610. V27CMTT can process 4 different Video signals，including Composite Video (CVBS)、Separate Video (S-Video ) and Component Video (YUV). Component Video also includes two types Y Cb/Cr and Y Pb/Pr, and I018,I031 SAA7118 is 16 channels analog input.
- Page 25 B. CV (Y Pb Pr )： Entering from P50 signal, then enters Pin#43、48、54 of AD9883-110 passed by the matching impedance resister and capacitance. It converts to RGB signal of YUV by I006 and passes to Port B of I019 by six row-resister RP08 ~ RP12. Then output to panel.
- Page 26 Pin#A1BLU0 ~ 7、A1GRN0 ~ 7、A1RED0 ~ 7 and B1BLU0 ~ 7、B1GRN0 ~ 7、 B1RED0 ~7 are data output from I019 to P005 and P802( to LCD Panel ). They are buffered by LP02,LP04,LP06,LP08,LP10,LP12 and filtered associated capacitors. These outputs are organized into even and odd connectors, each with 18 bits. 9.2 Keyboard Circuit &...
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Page 27: Circuit Diagram
10. Circuit Diagram 10-1 PCB Main Board Circuit... - Page 45 10-6 POWER Circuit...
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Page 46: Pcb Layout
11. PCB Layout... - Page 56 POWER Layout...
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Page 61: Electrical Part List
12. Electrical Part List Model NOTE V23CLTT V27CMTT V30CMTT part number CMO V270W1 CMO V296W1 TFT Panel LC230W01- 1.5051253641 1.5051253642 5051253645 (include 2.5051253656 Inverter) (include Inverter) panel is 1.50000100074 1.5000100069 Inverter included 2. panel is 2. 2. panel is PARTS... - Page 62 numbers can Board be the same , but system is different 5055123800 SPK-251 4-OHM SPK-251 Speaker 4-OHM 10W 5055123801 5055123700 5055123700 5000100072 5000100072 5000100072 Remote 5052731015 5052731015 5052731015 control MCU 40MHz 6647021813 6647021813 or Topro 128KBsync TP 2808 6647021817 6647021813 15P L1800mm 15P L1800mm 15P L1800mm...
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Page 63: Mechanical Disassembly
Mechanical Disassembly...