User manual MEMOREX MLT2022SM

[. . . ] Index of content Copyright2005 Aplus Technic All Rights Reserved Circuit Diagram VGA INPUT JACK D_Sub 3bit ADC Decoder 24bit MCU Keypad & IR YCbCr / YPbPr INPUT 1. Speacifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1. 1 TV System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1. 1. 1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1. 1. 2 Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] 16 3. 15. Speakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4. FAULT FINDING TREE . . . . . . . . . . . . . . . . . . . . . . . . . 17 Main page of fault finding tree . . . . . . . . . . . . . . . 17 Power supply repair flowchart . . . . . . . . . . . . . . . 18 OSD display repair flowchart . . . . . . . . . . . . . . . . . 19 PC mode repair flowchart . . . . . . . . . . . . . . . . . . . . . . 20 TV mode repair flowchart . . . . . . . . . . . . . . . . . . . . . . 21 AV, SV and YCbCr/ YPbPr mode repair flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Audio repair flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5. SDK BOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 1 1. Speacifications Copyright2005 Aplus Technic All Rights Reserved 1. Speacifications 1. 1 TV System 1. 1. 1 Introduction Aplus LM/LT series products are cutting-edge LCD TVs. Basing on advanced image processing technology and highly integrated circuit design, LM/LT series bring digital multimedia entertainment from theater to your home. This document is the detail spec of these optimized LCD TVs. We will define each sub-system except panel spec & inspection in detail. Panel spec & inspection standards aren't included in main content of this document, see attached files. 1. 1. 2 Key Features Ultra wide viewing angle-Super MVA technology Wide viewing angel: Horizontal 160 /Vertical 140 (CR>=10) HDTV Ready supported (480i/480p/1080i/720p) Automatic 3:2 pull-down & 2:2 pull-down detection and recovery 4:3/16:9/Anamorphic/Panorama aspect ratio MTS supported High brightness 450 nits High contrast ratio 450:1 Fast response time 16ms VGA (640x480 pixels) resolution Auto-tune image optimization for VGA Automatic VGA display mode detection & switching control 3-D motion adaptive video de-interlace function sRGB compliance allows end-user to experience the same colors as viewed on CRTs Enhanced 3D noise reduction Support YCbCr/YPbPr through VGA port. Smart Theme functions (Rich, Multimedia, Nature, Soft) Sound Theme functions (POP, Classic, Voice, Jazz, Flat) Audio setup functions (L/R Balance, 5 band Equalizer) 3 steps brightness control Easy access top keypad controls (Menu, Volume up/down, CH up/down, Power) Bundled 2W(max) x 2 stereo speaker Built-in audio amplifier (2W2) Wall-mountable design. 2 1. Speacifications Copyright2005 Aplus Technic All Rights Reserved 1. 1. 3 System Diagram Circuit Diagram VGA INPUT JACK D_Sub 3bit ADC Decoder 24bit MCU Keypad & IR YCbCr / YPbPr INPUT A port Video Image Processor B port 24bit LVDS IC 8bit 24bit Tuner BOX VChip Close Caption Video Decoder1 8bit De-Interlace PANEL RA port AV SV AV SV VGA Audio Amplifier Audio Processor Headphone Driver Speaker Earphone Jack YCbCr / YPbPr INPUT 1. 2 Panel speacifications 1. 2. 1 General spec brief Item Active Area Bezel Opening Area Driver Element Pixel Number Pixel Pitch Pixel Arrangement Display Colors Display Operation Mode Surface Treatment Specification 408 (H) x 306 (V) (20. 1" diagonal) 412 (H) x 310 (V) a-si TFT active matrix 640 x R. G. B. x 480 0. 6375 (H) x 0. 6375 (V) RGB vertical stripe 16. 7M Transmissive mode / Normally white Anti-reflective coating + Anti-glare coating Unit mm mm pixel mm color - - 3 1. Speacifications 1. Speacifications Copyright2005 Aplus Technic All Rights Reserved 1. 2. 2 Optical spec brief Item Contrast Ratio Response Time Center Luminance of White Average Luminance of White White Variation Cross Talk Red Green Blue White Color Gamut Viewing Angle Vertical Line 1. Speacifications Color Chromaticity Symbol CR TR TF LC LAVE W CT Rx Ry Gx Gy Bx By Wx Wy x+ xY+ Y- Min. TBD TBD x=0, Y =0 (0. 610) Viewing Normal Angle (0. 300) (0. 243) (0. 570) (0. 112) (0. 040) 0. 255 0. 263 Condition Horizontal Vertical Typ. Unit Note (450) Note(2) (5) ms Note(3) (11) ms 2 (450) cd/m Note(4) 2 TBD cd/m 1. 6 Note(7) 4 % Note(5) (0. 640) (0. 670) (0. 330) (0. 360) (0. 273) (0. 303) Note(6) (0. 600) (0. 630) (0. 142) (0. 172) (0. 070) (0. 100) 0. 285 0. 315 9, 300K 0. 293 0. 323 (75) % (80) Note (4) Definition of Luminance of White (L , L ): (80) Measure the luminance of gray level 255 at center point and 5 points Deg. Note(1) CR10 L = L (5) (75) L = [L (1)+ L (2)+ L (3)+ L (4)+ L (5)] / 5 (65) L (x) is corresponding to the luminance of the point X at the figure in Note (7). C AVE C AVE Note (1) Definition of Viewing Angle (x, y): Note (5) Definition of Cross Talk (CT): Normal x = y = 0 CT = | YB YA | / YA 100 (%) Where: YA = Luminance of measured location without gray level 0 pattern (cd/m ) 2 y- y+ YB = Luminance of measured location with gray level 0 pattern (cd/m ) y+ 12 o'clock direction y+ = 90 (0, 0) 2 X- = 90 xx- Active Area YA, U (D/2, W/8) (0, 0) Active Area YB, U (D/2, W/8) YB, R (7D/8, W/2) x+ (D/4, W/4) YA, L (D/8, W/2) Gray 128 YA, R (7D/8, W/2) YB, L (D/8, W/2) Gray 0 0 Gray Gray 128 YA, D (D/2, 7W/8) (3D/4, 3W/4) YB, D (D/2, 7W/8) 6 o'clock y- = 90 y- x+ X+ = 90 (D, W) (D, W) Note (6) Measurement Setup: The LCD module should be stabilized at given temperature for 30 minutes to avoid abrupt temperature change during measuring. In order to stabilize the luminance, the measurement should be executed after lighting Backlight for 30 minutes in a windless room. Note (2) Definition of Contrast Ratio (CR): The contrast ratio can be calculated by the following expression. Contrast 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 (7). [. . . ] Plug all the cables or wire in. Take all the cables or wire off. Take the 7 screws (EA0301211) off. 3. 10. Inverter PCB Dis-assembly and Assembly 3. Dis-Assembly & Assembly D10) Dis-assembly Take the high-voltage cables off . Plus the panel high-voltage cables in . Refer to the picture at right side. (Torque: 4. 50. 5KG) (P+3*6, 2 pcs) The high-voltage cables and screws 3. 11. Panel high-voltage cables Dis-assembly and Assembly Refer to the picture at right side. D11) Dis-assembly A5) Assembly Pass the cables Pass the high-voltage cables through the LCD metal. [. . . ]