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Akai LCT42Z6TM, Service Manual

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AKAI 

 

SERVICE MANUAL 

Model: LCT42Z6TM 

1. Safety 

Instructions………………...………………………………………………….1~2 

2.  Trouble Shooting manual of LCD…………………………………………………….3~

4

3. Product 

Specification………………………………………………………………….

5

~

7

 

4. Block 

Diagram….…………………………………………………………………….

8~9

 

5. Circuit 

diagram……………………………………………………………………….1

0

~1

7

6.  Basic Operation & Circuit Description………………………………………………1

8

~2

0

7.  Main IC Information…………………………………………………………………2

1

~

39

8. Panel 

Information……………………………………………………………………4

0

~

68

9. Explored 

View………………………………………………………………………

69

 

10.  Spare Pare List………………………………………………………………………7

0

~7

2

11. Software Upgrade……………………………………………………………………

73

~

75

 

 

This manual is the latest at the time of printing, and does not   
include the modification which may be made after the printing, 
by the constant improvement of product.   

Summary of Contents for LCT42Z6TM

Page 1: ...rcuit diagram 10 17 6 Basic Operation Circuit Description 18 20 7 Main IC Information 21 39 8 Panel Information 40 68 9 Explored View 69 10 Spare Pare List 70 72 11 Software Upgrade 73 75 This manual...

Page 2: ...small accumulators rechargeable batteries mini batteries cells and starter batteries should not be thrown into the garbage can Please leave them at an appropriate depot SAFETY INSTRUCTION The service...

Page 3: ...tc 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 or high...

Page 4: ...or vertical lines static lines Symptom may have four boxes There are 5 capacitors on the main PCB that have been identified as the primary cause of this symptom Replace the capacitors in location s on...

Page 5: ...up power board if not burn out place Is true it Please change power board or be changed power board 2 The power on switch of green extinguish 2 1 The power of led indicator light is red light To touc...

Page 6: ...ltage is 12v If not check the 12v power Please refer to attached sheet A circuit diagram 5 The remote control don t be control 5 1 The check batteries of remote control if it run out of 5 2 To check m...

Page 7: ...t Pitch 0 4845mm H x 0 4845mm V Color 16 7 millions of colors R G B each 256 scales Gray Scale 256 R G B each 8 bit Brightness Peak Value 500cd m2 Contrast Dark Room 800 1 Color System PAL NTSC Sound...

Page 8: ...y Hz 480i 15 734 59 94 480p 720x480 31 468 59 94 720p 1280x720 37 50 50 00 45 00 60 00 1080i 1920x1080 33 75 60 00 1080P 68 00 60 00 When the signal received by the Display exceeds the allowed range a...

Page 9: ...ect the color system such as PAL NTSC or AUTO Only for VIDEO and S VIDEO Enter Press to enter or con rm They are used as buttons in the OSD Menu screen also has enter function They are used as buttons...

Page 10: ...Video Switch 4052 Switch PI5V330 Audio S Video Audio Video Audio YPbPr1 YPbPr2 YPbPr1 Audio YPbPr2 Audio HDMI VGA E PROM 24C32 2 Panel LVDS Operation Amplifier 4558R Audio Amplifier R251502NP Speaker...

Page 11: ...Parts position Key Pad Speaker Power Board Speaker Main Board IR Board 9 75...

Page 12: ...10 75...

Page 13: ...11 75...

Page 14: ...12 75...

Page 15: ...13 75...

Page 16: ...14 75...

Page 17: ...15 75...

Page 18: ...16 75...

Page 19: ...17 75...

Page 20: ...1 pcs panel and 5 pcs PCB including 3 pcs Extension PCB 1 pcs Timming controller board and 1 pcs Back Light board in the Module SET There are 3 pcs PCBs including 1 pcs 1 pcs keypad board 1 pcs Remot...

Page 21: ...tage AC 120V 60Hz 2 To provide power for PCBs 2 Main board To converter S signals AV signals Y Pb Cb Pr Cr signals DVI HDMI signals and D SUB signals to digital ones and to dealing with the digital si...

Page 22: ...PCB failure analysis 1 POWER NO picture no power output 2 Back Light a No picture b Flash on screen c Darker picture with signals 20 75...

Page 23: ...Main IC Specifications HDTV Controller with Video Decoder 10 bit Dual LVDS Transmitter 21 75...

Page 24: ...ng for loudspeaker channel including volume balance mute tone EQ and virtual stereo surround n Digital Audio Interface I2 S digital audio input output S PDIF digital audio input output HDMI audio chan...

Page 25: ...IA With 6 8 bits options Reduced swing for LVDS for low EMI Supports flexible spread spectrum frequency with 360Hz 11 8MHz and up to 25 modulation n Integrated Micro Controller Embedded 8032 micro con...

Page 26: ...reliminary Data Sheet Version 0 5 3 8 21 2006 Copyright 2006 MStar Semiconductor Inc All rights reserved PIN DIAGRAM MST9U89AL Note 1 This pin diagram is based LVDS output For details please see the O...

Page 27: ...Pin RMID Mid Scale Voltage Bypass 18 VCLAMP CVBS YC Mode Clamp Voltage Bypass 19 REFP Internal ADC Top De coupling Pin 20 REFM Internal ADC Bottom De coupling Pin 21 REXT Analog Input External Resist...

Page 28: ...olerant Analog VSYNC Input from Channel 2 Fast Blanking Input from Channel 2 FBLK2 40 SOGIN2 Analog Input Sync On Green Input from Channel 2 Function Select Switch input from Channel 2 FSSW2 43 GIN2M...

Page 29: ...Input Right Channel 0 72 AUL1 Analog Input Audio Line Input Left Channel 1 73 AUR1 Analog Input Audio Line Input Right Channel 1 74 AUCOM Analog Input Reference Ground for Audio Line Input 75 AUL2 An...

Page 30: ...ative Data Output 200 LVA3P Output LVDS A Link Channel 3 Positive Data Output 199 LVA4M Output LVDS A Link Channel 3 Negative Data Output 198 LVA4P Output LVDS A Link Channel 3 Positive Data Output 19...

Page 31: ...Channel Bit 7 0 6mA driving strength 222 215 GA 7 0 Output w Pull down Resistor Port A Green Channel Bit 7 0 6mA driving strength 214 211 208 205 BA 7 0 Output w Pull down Resistor Port A Blue Channe...

Page 32: ...Output 1 4mA driving strength General Purpose Output GPIOD 5 173 PWM0 I O w 5V Tolerant Pulse Width Modulation Output 0 4mA driving strength General Purpose Output GPIOD 4 172 IRIN I O w 5V tolerant I...

Page 33: ...Pin Description section DRAM Interface Pin Name Pin Type Function Pin MVREF Input Reference Voltage for DDR SDRAM Interface 124 MCLKE Output DRAM Memory Clock Enable 125 MCLKZ Output DRAM Memory Clock...

Page 34: ...pose Output GPIOD 8 174 XIN Crystal Oscillator Input Crystal Oscillator Input 255 XOUT Crystal Oscillator Output Crystal Oscillator Output 254 Power Pins Pin Name Pin Type Function Pin AVDD_DVI 3 3V P...

Page 35: ...A 7 223 VDDP VDDP 224 GND GND 225 GPIOE 3 LCK 226 GPIOE 2 LDE 227 GPIOE 1 LHSYNC 228 GPIOE 0 LVSYNC Note 2 Pin Configuration vs Function Pin 88 96 Pin GPIOFNote ITU656 Out GPIOF_SEL 00 ITU656 8 bit In...

Page 36: ...6 241 DI 7 244 DI 8 SPDIFI SPDIFO 245 DI 9 AIWS AUMCKO 246 DI 10 AISCK AUMUTE 247 DI 11 AISD AUWS 248 DI 12 AUSCK 249 DI 13 AUSD 250 DI 14 251 DI 15 SPDIFO Audio Interface Pin Name Pin Type Function A...

Page 37: ...Y 7 CbCr 0 CbCr 7 DI 1 YCbCr 1 YCbCr 6 YCbCr 3 YCbCr 6 Y 1 Y 6 CbCr 1 CbCr 6 DI 2 YCbCr 2 YCbCr 5 YCbCr 4 YCbCr 5 Y 2 Y 5 CbCr 2 CbCr 5 DI 3 YCbCr 3 YCbCr 4 YCbCr 5 YCbCr 4 Y 3 Y 4 CbCr 3 CbCr 4 DI 4...

Page 38: ...put Full Scale Matching 1 5 FS Brightness Level Adjustment 50 FS SWITCHING PERFORMANCE Maximum Conversion Rate 150 MSPS Minimum Conversion Rate 12 MSPS HSYNC Input Frequency 15 200 kHz PLL Clock Rate...

Page 39: ...VVDD_33 0 3 3 6 V 2 5V Supply Voltages VVDD_25 0 3 2 75 V 1 8V Supply Voltages VVDD_18 0 3 1 98 V Input Voltage 5V tolerant inputs VIN5Vtol 0 3 5 0 V Input Voltage non 5V tolerant inputs VIN 0 3 VVDD...

Page 40: ...ISING OUT OF THE APPLICATION OR USER OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS NOR THE RIGHTS OF OTHERS REVISION HISTORY Document Descriptio...

Page 41: ...002 A2 1 35 1 40 1 45 0 053 0 055 0 057 D 30 00 1 181 D1 28 00 1 102 D2 8 50 9 05 0 346 0 356 E 30 00 1 181 E1 28 00 1 102 E2 8 50 9 05 0 346 0 356 Millimeter Inch Symbol Min Nom Max Min Nom Max q 0 7...

Page 42: ...pproval please use the above model name without suffix SUFFIX SL01 FOR APPROVAL SPECIFICATION TV Product Development Dept LG Philips LCD Co Ltd Y H Choi Engineer PREPARED BY REVIEWED BY SIGNATURE DATE...

Page 43: ...ELECTROSTATIC DISCHARGE CONTROL 28 9 4 PRECAUTIONS FOR STRONG LIGHT EXPOSURE 28 9 5 STORAGE 28 Appendix B Black Level and Black Uniformity 30 3 5 COLOR DATA REFERENCE 7 2 EMC 25 8 PACKING 26 8 1 DESIG...

Page 44: ...for PAL 13 3 4 Signal Time Waveforms 5 Table 1 Absolute maximum ratings 17 Table 13 Optical Characteristics 18 Add note 7 for Black Level and Black Uniformity 0 2 May 17 2005 12 Table 7 Timing table 1...

Page 45: ...PCTV where high brightness super wide viewing angle high color gamut high color depth and fast response time are important General Features Active Screen Size 42 02 inches 1067 31mm diagonal Outline...

Page 46: ...o condensation of water 90 10 20 30 40 50 60 70 80 0 20 0 10 20 30 40 50 Dry Bulb Temperature C Wet Bulb Temperature C Storage Operation Humidity RH 10 40 60 60 2 Absolute Maximum Ratings Value Parame...

Page 47: ...ndition whereas mosaic pattern 8 x 6 is displayed and fV is the frame frequency 2 The current is specified at the maximum current pattern 3 The duration of rush current is about 2ms and rising time of...

Page 48: ...ared to that of initial value at the typical lamp current on condition of continuous operating at 25 2 C Specified value is when lamp is aligned horizontally 4 The maximum value for unloading Input Vo...

Page 49: ...ANNEL 2 SECOND CHANNEL 2 Ground SECOND CLOCK CHANNEL C SECOND CLOCK CHANNEL C Ground SECOND CHANNEL 3 SECOND CHANNEL 3 No connection No connection No connection or GND No connection or GND Ground Grou...

Page 50: ...G17 G27 B10 B20 B11 B21 B12 B22 B13 B23 B14 B24 B15 B25 B16 B26 B17 B27 Hsync Vsync Data Enable CLOCK Host System 24 Bit TA1 TA1 TB1 TB1 TC1 TC1 TCLK1 TCLK1 TD1 TD1 TA2 TA2 TB2 TB2 TC2 TC2 TCLK2 TCLK...

Page 51: ...13 14 15 16 17 19 20 22 23 28 29 30 31 32 33 35 36 38 39 7 10 100 100 100 100 100 48 49 46 47 39 40 34 32 29 FI R51S HF Timing Controller LCD Module Vcc 51 79 52 80 53 81 54 82 57 83 58 84 59 85 60 8...

Page 52: ...R GND GND 2 Status Upper 3 0V Normal Under 0 7V Abnormal Status VBL VBL VBL VBL GND GND GND GND GND VBR Note 1 VBL Power Supply 24 0V 2 VBL Power Supply 24 0V 3 VBL Power Supply 24 0V 4 VBL Power Supp...

Page 53: ...VT tVV 11 45 69 Line Total tVT 1091 1125 1149 Line Vertical Valid tHV 960 tCLK 320 1280 140 1100 100 1060 Unit Notes Blank tHT tHV tCLK Horizontal Total tHT tCLK 2200 2 Table 9 TIMING TABLE for PAL KH...

Page 54: ...uly 22 2005 0 7VDD 0 3VDD tCLK Invalid data Valid data Invalid data Invalid data Invalid data Pixel 0 0 Pixel 2 0 Pixel 1 0 Pixel 3 0 DE Data Enable Valid data 0 5 VDD tHT DE Data Enable DCLK First da...

Page 55: ...0 0 0 0 GREEN 255 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 RED 001 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 RED RED 254 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 RED 255 1 1 1 1 1...

Page 56: ...protection pattern Black pattern till valid signal inputted There is no reliability problem 4 The T3 T4 is recommended value the case when failed to meet a minimum specification abnormal display woul...

Page 57: ...Value Parameter Min Typ Max Remark T1 20 ms After Inverter s connected T4 100 ms VBL Min x 0 8 T2 500 ms T3 200 ms ms T5 10 Unit Table 12 POWER SEQUENCE FOR INVERTER Enable On Off VBR Power For Inver...

Page 58: ...REEN BLUE WHITE Viewing Angle CR 10 x axis right 0 r 85 89 x axis left 180 y axis up 90 y axis down 270 l 85 89 u 85 89 d 85 89 degree 5 Gx 0 286 Gy 0 613 Bx 0 147 By 0 070 Wx 0 285 Wy 0 293 Rx 0 638...

Page 59: ...s defined as the required time for the transition from G N to G M Rise Time TrR and from G M to G N Decay Time TrD For additional information see the FIG 3 N M 5 Viewing angle is the angle at which th...

Page 60: ...igure and shall be measured by switching the input signal for Gray N and Gray M Measuring point for surface luminance measuring point for luminance variation FIG 2 5 Points for Luminance Measure A H 4...

Page 61: ...Product Specification 20 30 LC420WU1 Liquid Crystal Display Ver 1 0 July 22 2005 FIG 4 Viewing Angle Dimension of viewing angle range Normal Y E 0 Right 180 Left 270 Down 90 Up...

Page 62: ...gs in terms of tolerance 5 Mechanical Characteristics Table 15 MECHANICAL CHARACTERISTICS Item Value Horizontal 1005 6 mm Vertical 609 8 mm Vertical 531 0 mm Vertical 523 26 mm Weight 14 5Kg Typ 15 5K...

Page 63: ...Product Specification 22 30 LC420WU1 Liquid Crystal Display Ver 1 0 July 22 2005 FRONT VIEW...

Page 64: ...Product Specification 23 30 LC420WU1 Liquid Crystal Display Ver 1 0 July 22 2005 REAR VIEW Master Slave...

Page 65: ...ature operation test Ta 0 C 240h 5 Vibration test non operating Waveform Random Vibration Level 1 0G RMS Bandwidth 10 500Hz Duration X Y Z 10 min One time each direction 6 Shock test non operating Sho...

Page 66: ...zation CENELEC European Standard for Safety of Information Technology Equipment 7 2 EMC a ANSI C63 4 Methods of Measurement of Radio Noise Emissions from Low Voltage Electrical and Electrical Equipmen...

Page 67: ...odule This is subject to change without prior notice 8 2 Packing Form a Package quantity in one Pallet 10 pcs b Pallet Size 1140 mm X 1000 mm X 810 mm 5 SERIAL NO Mark Year 6 2006 2 2002 3 2003 4 2004...

Page 68: ...petroleum benzine Normal hexane is recommended for cleaning the adhesives used to attach front rear polarizers Do not use acetone toluene and alcohol because they cause chemical damage to the polarize...

Page 69: ...uld not come in contact with any other object It is recommended that they be stored in the container in which they were shipped 9 5 Storage 9 6 Handling Precautions for Protection Film 1 The protectio...

Page 70: ...reventing inverter s abnormal operation If inverter input voltage come back normal condition this protection circuit will be reset and inverter works properly 2 Input Voltage Protection Circuit Conten...

Page 71: ...3 Lon4 Lon5 3 Sampling Size regular RV event test quantity 5 pcs 4 Measurement Method Follow same rule as optical characteristics measurement 5 Measurement location refer to below 6 Current Status Bel...

Page 72: ...69 75...

Page 73: ...USA MONITOR 1 000000 SET K 6 200 L42AE02 01AA CABINET FRONT MATT BLACK SILVER LCT42Z6TM LPL USA A 1 000000 Piece S 7 202 L42AE01 01AA CABINET BACK BLACK W O DVD POWER SWITCH LCT42Z6TM A 1 000000 Piec...

Page 74: ...27 579 L32AD09 02AP FCC STATEMENT LABEL 77X20MM 1 000000 Piece S 28 579 L42AE01 01AP BAR CODE LABEL AKAI LCT42Z6TM USA P 2 000000 Piece S 29 590 L42AE01 01AP WARRANTY CAR AKAI ENG LCT42Z6TM USA P 1 0...

Page 75: ...ce S 43 E7301 010002 BATTERY AAA R03P1 5V 2 2 000000 Piece S 44 G300 L42AE03 02CA ROHS POLYFOAM BOTTOM RS SHANG HAO 1 000000 Piece S 45 G300 L42AE04 02CA ROHS POLYFOAM TOP RS SHANG HAO 1 000000 Piece...

Page 76: ...ble adaptor show in photo 1 Printer port plug connect to your PC the VGA Jack connect to LCT42Z6TM Monitor VGA socket photo 1 Step 2 Expend ISP_tool rar then run ISP_tool V4 0 5 exe program with your...

Page 77: ...3 Click Read button and select MST_FLASH_512 Bin file to load CODE data photo 3 Step 4 Click Connect Button connect your PC photo 4 Notice if connecting fail it will show a message like the photo 5 7...

Page 78: ...then Click Run Button it will finish the installation automatic Notice if this step fail press run button again till the installation is ok photo 6 Step 6 After the installation is finished please tu...

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