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Akai LCT2716 Service Manual Download Page 30

Basic Operations & Circuit Description 

 

Main Electric Components 
(1). MODULE: 

    

 

 There are 1 pc. panel and 2 pcs. PCB including 1 pc. INVERTER 

board(L), 1 pc. T-CONTROL board, 
 

(2).SIGNAL PROCESS 

   

   There are 4 pcs. PCBs including  

         
        1 pc. Audio&Tuner board,  
        1 pc. Main digital board,  
        1 pc. Keypad board,  
        1 pc. Remote Control Receiver board,  
         

 

(3).POWER 

     

There are 1 pc. PCB for power. 

 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 

Summary of Contents for LCT2716

Page 1: ...Descriptions LCD Panel specification Exploded View Diagram Spare parts list V chip password and software upgrade Model SERVICE MANUAL This manual is the latest at the time of printing and does not in...

Page 2: ...ightness The high voltage must not exceed 30 KV under any circumstances Each time when a receiver requires servicing the high voltage should be checked The reading of the high voltage is recommended t...

Page 3: ...orks etc 6 When servicing is required observe the original lead dressing Extra precaution should be given to assure correct lead dressing in the high voltage area 7 Keep wires away from high voltage o...

Page 4: ...HAB Customer Model No LCT2716 Design Code LC26HABCUSXM1 A02 BOM No LC26HABCUSXM1 A02 Artwork Ass y No 797 L26AB01 01 Description AKAL LCD TV 26 NTSC AC100V 240 V AC USA Checked By Electronic Engineer...

Page 5: ...e Scanning Yes Film Mode Pull Down Yes GAMMA Correction Yes Color Temperature Control Yes Comb Filter Yes Second De interlace for Sub picture No Wide Mode Full Fill Aspect Ratio Nonliner LB to 16 9 LB...

Page 6: ...0 5 720 400 31 47 70 08 36 00 6 800 600 35 16 56 25 36 00 7 800 600 37 90 60 32 40 00 8 800 600 46 90 75 00 49 50 9 800 600 48 08 72 19 50 00 10 832 624 49 00 75 00 57 27 11 1024 768 48 40 60 00 65 00...

Page 7: ...button 4 PIP button 5 SOURCE button 6 PIP SIZE button 7 PIP POS button 8 VOL button 9 CH button 10 MTS button 11 UP DOWN LEFT RIGHT ENTER buttons 12 SYSTEM button 13 MENU button 14 V CHIP button 15 CC...

Page 8: ...Internal 8 ohm 10W max 2 10 Operating temperature Fulfill all specifications 15 C 30 C Accept picture sound reproduction 5 C 33 C 11 Operating relative humidity Fulfill all specifications 45 75 Accep...

Page 9: ...sound carrier 30 28 Below adjacent sound carrier 30 30 dB Adjacent picture carrier 45 40 Up adjacent picture carrier 40 30 9 IF rejection 55 45 dB 10 Image rejection VHF 57 45 dB UHF 55 40 11 AFT pull...

Page 10: ...o 1KHz AV mode 8 3 dB 31 Balance Center 0 2 Max 3 2 dB Min 35 30 32 Video input level 1 0 1 0 3 Vpp 33 Audio input level 1 1 0 0 5 0 3 Vrms 34 Video output level N A N A Vrms 35 Audio output level 2 0...

Page 11: ...ightness Contrast Saturation Tint sharpness set at normal C Connect RMS volt meter to speaker terminals and adjust the LCD volume to get 500mW RMS power at each terminals D With image sticking protect...

Page 12: ...Tuner DDR1 DDR2 Flash AV1 MUX TV Y1PbPr Y2PbPr S_Video VGA LVDS PANEL Backlight LVDS SIGNAL LVDS SIGNAL GPIO GPIO VGA_L R S1_AV1_L R Y1PbPr_L R Y2PbPr_L R AOSDATA1 DACBCLK DACMCLK DOUT DACLRC WM8776 C...

Page 13: ...CL TUNER_12V SYS_PWR ORO7 TUNER_12V MUTE 12V ORO7 RSTXD RSRXD INVERTER_PWR PWR_GND RXD TXD RxD TxD TXD 3 RXD 3 SDA 6 9 11 13 SCL 6 9 11 13 TUNER_12V 11 UP1_5 6 12V 2 ORO7 3 TXD RXD DV33A 5VSB 5VSB VCC...

Page 14: ...U2 AZ34063A PWM 1 2 3 4 5 6 7 8 SWC SWE TC GND CII VCC Ipk DRC R6 13k CB6 0 1uF CB8 0 1uF C2 270pF CE6 220uF 16v CB200 0 1uF CB215 3300pF L10 FB C5 10uF 10v CE7 100uF 16v L6 FB BEAD SMD 0805 CB217 33...

Page 15: ...EF 4 AUXTOP 4 AUXBOTTOM 4 ADCVDD 4 SVM 14 R 14 G 14 B 14 DVISDA 8 DVISCL 8 DVIVSYNC 8 9 DVIHSYNC 8 9 DVIDE 8 9 DVIODCK 8 9 VI 0 23 9 MPX2 12 MPX1 12 ANALOGVDD 4 IR 15 HWSCL 6 HWSDA 6 IOCE 6 IOWR 6 GRE...

Page 16: ...FB R21 560 CB28 0 1uF C0603 SMD L37 FB R34 50 L28 FB BEAD SMD 0805 CB48 0 1uF C0603 SMD L17 FB BEAD SMD 0603 CB34 0 1uF C0603 SMD CB54 0 1uF C0603 SMD CE31 47uF 16v R20 100k CB31 0 1uF C0603 SMD C20 1...

Page 17: ...CD TV MediaTek MT8205 Solution B 5 16 Tuesday May 10 2005 Title Size Doc Number Rev Date Sheet of DV18A DV33A DV18A CB68 0 1uF C0603 SMD CB69 0 1uF C0603 SMD C31 3300pF C0603 SMD C30 3300pF C0603 SMD...

Page 18: ...205UP3_4 8205UP3_5 8205UP1_2 8205UP1_3 8205UP1_4 8205UP1_5 SDA SCL A 0 7 ICE UP3_0 UP3_1 UP3_4 UP3_5 UP1_4 UP1_5 MUTE UP1_3 8205UP1_6 UP1_6 8205UP1_7 UP1_7 SCL SDA UP1_5 UP1_4 IOCE IOWR UP3_1 UP1_3 UP...

Page 19: ...220uF 16v CB125 0 1uF R59 22 CB76 0 1uF CB129 0 1uF CB90 0 1uF U14 MX29LV160BT 25 24 23 22 21 20 19 18 8 9 28 47 16 29 31 33 35 7 26 38 40 42 44 30 32 10 36 39 41 43 45 37 27 11 15 34 46 6 4 5 3 2 1 4...

Page 20: ...C VSYNC_VGA HSYNC_VGA VGA_R VGA_L BLUE RED GREEN BLU_GND 12 RED_GND 12 VGAVSYNC 3 VGAHSYNC 3 VGASCL 3 GRN_GND 12 VGASDA 3 VGA_IN_R 13 VGA_IN_L 13 RED 12 GREEN 12 BLUE 12 VCC VGA_PLUGPWR VGA_PLUGPWR C1...

Page 21: ...Y_GND YPBPR1_L YPBPR1_R Y CB CB_GND CR CR_GND SDA SCL AF1_OUT SIF1_OUT TV TV_GND YPBPR1_L YPBPR1_R S1_AV1_L S1_AV1_R SC_IN SC_IN SY_GND SY SC SC_GND SY_IN SY_IN S1_AV1_L S1_AV1_R YPBPR1_L YPBPR1_R CB...

Page 22: ...3 CVBS0 11 AF1_OUT 11 SIF1_OUT 11 MPX2 3 MPX1 3 VGASOG 3 BLU_GND 10 GRN_GND 10 RED_GND 10 CR 11 CB 11 Y 11 SOY 3 11 CVBS0_GND 11 CVBS1 11 CVBS1_GND 11 CVBS2 11 CVBS2_GND 11 Y_GND 11 CB_GND 11 CR_GND 1...

Page 23: ...CB170 0 1uF TP12 TP22 TP31 R361 33 R231 33 TP16 R215 100 R217 0 CE110 10uF 25v CB168 0 1uF R232 33 TP17 R241 0 CE63 10uF 25v R242 0 U28 WM8776 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22...

Page 24: ...VDD SVM LVDS AP 0 7 3 AN 0 7 3 CLK1 3 CLK1 3 CLK2 3 CLK2 3 G 3 R 3 B 3 SVM 3 VSYNC 3 HSYNC 3 GPIO 3 VCC 12V L75 0 082uH L IND SMD 0603 R279 75 1 CB185 0 1uF L3 FB BEAD SMD 0805 C149 33pF CE87 220uF 16...

Page 25: ...ming UP3_0 PWM0 LED_GRN UP3_1 6 8 OBO0 3 OBO1 3 OBO2 3 OBO3 3 OBO4 3 OBO5 3 URST 3 6 IR 3 OBO6 3 OBO7 3 UP1_2 6 UP3_0 6 PWM0 3 DV33A 5VSB DV33A VCC VCC VCC 5VSB L89 FB BEAD SMD 1206 R4 510 R290 0 R291...

Page 26: ...1 2 1C6 10nF 1 2 CE7 33uF 16V 1 2 1R5 100 1 2 1L5 FB 2 2 3 3 4 4 5 5 9 9 8 8 7 7 6 6 NC 1 M1 GND HOLE 1 2 1L6 FB 1 2 CE8 100uF 16V 1 2 FB2 0 1 2 1R15 0 1 2 1R12 71 5 1 2 1R6 100 1 2 1C1 10nF 1 2 CE3...

Page 27: ...K 5 1 2 L5 10uH 1 2 R37 10K 5 1 2 R12 10K 5 1 2 C10 100UF 25V 1 2 R17 100K 5 C41 22pF 1 2 C35 100NF X7R 1 2 R4 100K 5 1 2 C21 22pF NPO 1 2 C4 100UF 25V 1 2 R8 10 5 1 2 C16 100NF X7R 5 6 OUT 7 U2B RC45...

Page 28: ...9 1N4148 MUTEB AGND AGND D10 NC R43 0R AGND AGND LOUT ROUT AUSPL AUSPR 1 2 R57 4K7 5 1 2 R63 10K 5 1 2 R48 1k8 5 C2 100U 35V 1 2 R58 4K7 5 5 6 OUT 7 U5B RC4558 1 2 R52 22K 5 1 2 R49 4K7 5 1 2 R59 10K...

Page 29: ...130K R51 120K R54 43K R52 1K D11 1N4148 Q6 BC327 SHORT CIRCUIT PROTECTION C52 22NF 1 2 3 4 5 6 7 8 J1 PH 2 0 1 2 3 4 5 J2 PH2 0 1 2 3 4 5 6 J3 PH2 5 1 2 3 4 J4 PH2 0 5V 5V 5V GND GND GND 12V 12V 5VS...

Page 30: ...here are 1 pc panel and 2 pcs PCB including 1 pc INVERTER board L 1 pc T CONTROL board 2 SIGNAL PROCESS There are 4 pcs PCBs including 1 pc Audio Tuner board 1 pc Main digital board 1 pc Keypad board...

Page 31: ...rogressive 3 Converter the Digital to fit the panel display mode and output the LVDS signal to Panel 3 Tuner Audio Board 1 Convert TV RF signal to video and audio signal to Main board 2 Decoder the TV...

Page 32: ...from Key Switch or Remote Receiver 2 When the ON signal from Key Switch or Remote Receiver is detected Micro Processor will send ON Control signals to Power Then Power sends 5Vsc 12Vsc 24V and RLY ON...

Page 33: ...light will pass through the energized display but will be blocked by the rear polarizer An LCD in this form is acting as a light shutter Displays with variable characters are created by selectively e...

Page 34: ...emble in the reverse order 1 Removal of the Back Cover 2 Removal of the MAIN PCB a Remove the screws PCB from LCD Remove the Anode cap from Thepicture tube To avaid a shock hazard be sure to discharge...

Page 35: ...IC DESCRIPTION MT8205G AT24C02 MX29LV160BBTC LP2996 AZ1117 H WM8776 MX232A ISAV330...

Page 36: ...D AE18 REXTA J4 BN B13 IOA1 AD14 DVSS18 T13 DACVDDA P4 AOMCLK E24 DVSS2 P16 APLL_CAP A16 CLK1N N1 RVREF G23 AD1 AD15 ADCVDD1 C5 OBO3 AF1 RA2 N23 OGO5 AC5 EBO3 W3 VI8 B19 VI16 B21 ERO1 AD1 LVSSC N12 DQ...

Page 37: ...lock C25 AOLRCK O Audio out left right clock C26 AOBCK O Audio out bit clock A25 AOSDATA0 O Audio out data line 0 A26 AOSDATA1 O Audio out data line 1 B26 AOSDATA2 O Audio out data line 2 B25 AOSDATA3...

Page 38: ...d Temperature Devices Available 8 Pin and 14 Pin JEDEC SOIC and 8 Pin PDIP Packages Description The AT24C01A 02 04 08 16 provides 1024 2048 4096 8192 16384 bits of serial elec trically erasable and pr...

Page 39: ...SERIAL DATA SDA The SDA pin is bidirectional for se rial data transfer This pin is open drain driven and may be wire ORed with any number of other open drain or open collector devices DEVICE PAGE ADDR...

Page 40: ...tion to read data from orprogramdatato any sectorthatisnotbeingerased then resumes the erase Status Reply Datapolling Togglebitfordetectionofprogramand GENERAL DESCRIPTION The MX29LV160BT BB is a 16 m...

Page 41: ...nd on the LP2996 is an active low shutdown SD pin that provides Suspend To RAM STR functionality When SD is pulled low the VTT output will tri state providing a high impedance output but VREF will rem...

Page 42: ...nnected to the S port When EN is high the switch is disabled and the high impedance state exists between the D and S ports The select IN input controls the data path of the multiplexer demultiplexer O...

Page 43: ......

Page 44: ...uipment Hand Held Equipment ____________________________Features ESD Protection for RS 232 I O Pins 15kV Human Body Model 8kV IEC1000 4 2 Contact Discharge 15kV IEC1000 4 2 Air Gap Discharge Latchup F...

Page 45: ...2 R1 R2 PIN NUMBERS ON TYPICAL OPERATING CIRCUIT REFER TO DIP SO PACKAGE NOT LCC 1 0 F CAPACITORS MAX232E ONLY 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 VCC GND T1OUT R1IN C2 C1 V C1 MAX202E MAX232E R1OU...

Page 46: ...proved by Note CONTENTS LCD TV Marketing and Project Management Dept Project Manager 1 26 The information described in this technical specification is tentative and it is possible to be changed withou...

Page 47: ...ULE 5 2 BACKLIGHT UNIT 5 3 BLOCK DIAGRAM OF INTERFACE 5 4 LVDS INTERFACE 5 5 COLOR DATA INPUT ASSIGNMENT 6 INTERFACE TIMING 15 6 1 INPUT SIGNAL TIMING SPECIFICATIONS 6 2 POWER ON OFF SEQUENCE 7 OPTICA...

Page 48: ...Max Red Rx 0 616 0 646 0 676 0 616 0 646 0 676 Ry 0 302 0 332 0 362 0 302 0 332 0 362 Green Gx 0 239 0 269 0 299 0 239 0 269 0 299 Gy 0 570 0 600 0 630 0 570 0 600 0 630 Blue Bx 0 112 0 142 0 172 0 1...

Page 49: ...Opening Area 603 22 H x 341 98 V mm 1 Driver Element a si TFT active matrix Pixel Number 1280 x R G B x 720 pixel Pixel Pitch Sub Pixel 0 1555 H x 0 4665 V mm Pixel Arrangement RGB vertical stripe Di...

Page 50: ...te 2 The temperature of panel display area surface should be 0 C Min and 60 C Max Note 3 2 ms half sine wave 1 time for X Y Z Note 4 10 500 Hz 10 min 1 time each X Y Z Note 5 At testing Vibration and...

Page 51: ...Specified values are for lamp Refer to 3 2 for further information Note 3 Protect inverters from moisture condensation and freezing 3 ELECTRICAL CHARACTERISTICS 3 1 TFT LCD MODULE Ta 25 2 C Value Par...

Page 52: ...e 3 The specified power supply current is under the conditions at Vcc 5 V Ta 25 2 C fv 60 Hz whereas a power dissipation check pattern below is displayed b Black Pattern a White Pattern Active Area Ac...

Page 53: ...onsumption PL 92 W 4 Inverter Input Note 1 Lamp current is measured by utilizing high frequency current meters as shown below LCD Module Inverter 1 HV Pink 2 HV White 1 HV Pink 2 HV White 1 HV Pink 2...

Page 54: ...that has equal or more than 70 brightness compared to the brightness at the center point Note 6 The waveform of the voltage output of inverter must be area symmetric and the design of the inverter mu...

Page 55: ...I NPUT CONNECTOR JAE FI SE30P HF GND LAMP CONNECTOR RX0 RX1 RX2 RX3 RXC Vcc VL 4 2 BACKLIGHT UNIT Lamp connector HV BHR 03 VS 1 JST 7 LV ZHR 2 JST 1 1 LV Gray 1 HV Pink 2 HV White 2 HV White 1 HV Pin...

Page 56: ...t Channel 0 20 RX0 Negative LVDS differential data input Channel 0 21 GND Ground 22 GND Ground 23 GND Ground 24 GND Ground I25 GND Ground 26 VCC 5 0V power supply 27 VCC 5 0V power supply 28 VCC 5 0V...

Page 57: ...ntroller DE B0 B7 G0 G7 R0 R7 R0 R7 Pixel R Data G0 G7 Pixel G Data B0 B7 Pixel B Data DE Display timing signal Notes 1 The system must have the transmitter to drive the module 2 LVDS cable impedance...

Page 58: ...45 46 47 51 53 54 55 1 6 7 34 41 42 49 50 2 3 5 Rx OUT0 Rx OUT1 Rx OUT2 Rx OUT3 Rx OUT4 Rx OUT6 Rx OUT7 Rx OUT8 Rx OUT9 Rx OUT12 Rx OUT13 Rx OUT14 Rx OUT15 Rx OUT18 Rx OUT19 Rx OUT20 Rx OUT21 Rx OUT2...

Page 59: ...1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0...

Page 60: ...h 1450 1650 2000 Tc Th Thd Thb Display Thd 1280 1280 1280 Tc Horizontal Active Display Term Blank Thb 170 370 720 Tc Note Because of this module is operated by DE only mode Hsync and Vsync input signa...

Page 61: ...ply the lamp voltage within the LCD operation range When the backlight turns on before the LCD operation of the LCD turns off before the backlight turns off the display may momentarily become abnormal...

Page 62: ...e Contrast Ratio CR 400 600 Note 2 TR 15 25 ms TF 10 20 ms Note 3 Response Time Gray to gray 16 6 ms Note 4 Center Luminance of White LC 450 550 cd m2 Note 5 Average Luminance of White LAVE 400 450 cd...

Page 63: ...ntrast Ratio CR L255 L0 L255 Luminance of gray level 255 L 0 Luminance of gray level 0 CR CR 5 CR X is corresponding to the Contrast Ratio of the point X at the figure in Note 8 Note 3 Definition of R...

Page 64: ...luminance of the point X at the figure in Note 8 Note 6 Definition of Cross Talk CT CT YB YA YA 100 Where YA Luminance of measured location without gray level 0 pattern cd m2 YB Luminance of measured...

Page 65: ...x Display Color Analyzer Minolta CA210 Center of the Screen LCD Panel LCD Module Note 8 Definition of White Variation W Measure the luminance of gray level 255 at 5 points W Maximum L 1 L 2 L 3 L 4 L...

Page 66: ...8 2 are the packing method LCD TV Module Anti Static Bag Drier Carton Label Approx 19Kg 4 modules per 1 carton Carton dimensions 742 L x327 W x510 H mm Weight Carton PE Foam Bottom Tape Figure 8 1 pa...

Page 67: ...ss Weight 180kg Carton Label Bottom Cap PP Belt Film Bottom Cap L1100 W1100 H120mm PE Sheet Figure 8 2 packing method 22 26 The information described in this technical specification is tentative and i...

Page 68: ...X X X Y M D L N N N N MADE IN TAIWAN V270W1 L03 Rev XX CMO Internal Use CMO Internal Use Revision CMO Internal Use Serial ID includes the information as below a Manufactured Date Year 1 9 for 2000 200...

Page 69: ...during operation 9 High temperature or humidity may deteriorate the performance of LCD module Please store LCD modules in the specified storage conditions 10 When ambient temperature is lower than 10...

Page 70: ...ECHANICAL CHARACTERISTICS 25 26 The information described in this technical specification is tentative and it is possible to be changed without prior notice Please contact CMO s representative while y...

Page 71: ...3 Approval 26 26 The information described in this technical specification is tentative and it is possible to be changed without prior notice Please contact CMO s representative while your product des...

Page 72: ...Exploded View Diagram Exploded View Diagram...

Page 73: ...Y L 280MM TU PCS 1 20 E3421 925037 WIRE ASSY TTJC3 2Y L 450MM SPK R PCS 1 21 E3421 925038 WIRE ASSY TJC3 2Y L 850MM SPK L PCS 1 22 E3421 925039 WIRE ASSY LVDS L 300MM 30P 30P PCS 1 23 E3421 925040 WIR...

Page 74: ...579 LC2701 02 UPC LABEL 50X23MM OF UNIT LCT2716 PCS 1 30 579 LC2702 02 UPC LABEL OF G B LCT2716 PCS 2 31 580 L26AB01 03 IB E FOR AKAI LC26HAB USA MICO PCS 1 32 590 LC2701 02 WARRANTY CARD AKAI LCT271...

Page 75: ...nnect 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 1 No Pin name 5 1 No connection 2 RXD Receive data 3 TXD Transmit...

Page 76: ...mode Copy the software MTKTOOL to the computer Open the software MTKTOOL EXE Select MTK 8205 and Point browse on the interface of the MTKTOOL exe Select the file which will be update Point update on...

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