BenQ Q7T3-FP737S Service Manual Download Page 130 | Manualshive

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Q7T3 (CPT panel) LCD Monitor Service Guide

Circuit Operation Theory

10

3.2 PWM Control circuit

TL1451 is a dual PWM controller.C765 and R765 decide the working frequency.BLT_ADJ signal is
from control board, control pulse width then decide how much energy delivery to CCFL also decide
CCFL brightness. Q741 and Q742 be the buffer to rise the drive capability and the totem poles circuit
can improve a capable of driving for Q743.C770 decide the striking time delay.

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Summary of Contents for Q7T3-FP737S

Page 1: ...tting area press ENTER EXIT and then press SOFTPOWER 2 Setup input timing ICL 605 1280 1024 75Hz 5 MOSAIC pattern timing 202 pattern 42 3 Press I key to enter window for whitebalance and burning mode...

Page 2: ...D file 4 Runs the writing program to write the EDID file into EEPROM for analog input ie 15 pin D sub 5 Read both EEPROM data and confirm it to match with the C212 document definition 6 Connect PC to...

Page 3: ...ta checksum Write C3 Reddish G Gain Data to NVRAM AA 5D Data checksum Write C3 Reddish B Gain Data to NVRAM AA 5E Data checksum Write User R Gain Data to NVRAM AA 6C Data checksum Write User G Gain Da...

Page 4: ...7 Address XX checksum Write EEPROM Bank 0 B8 Address Data checksum Write EEPROM Bank 1 B9 Address Data checksum Write EEPROM Bank 2 BA Address Data checksum Write EEPROM Bank 3 BB Address Data checksu...

Page 5: ...or OEM model for reference only Write sRGB Contrast CA 53 Data checksum Write sRGB Brightness CA 54 Data checksum Write Serial number byte 0 9 AA 0 9 XX checksum Read Serial number byte 0 9 A3 0 9 XX...

Page 6: ...Q7T3 FP737S Dual function LCD Monitor Service Guide Alignment Procedure 6 Confidential 2 Dressing A Check the 4 springs and 5 spacers on the BKT B Connect 2 with 1 then connect to connector 3...

Page 7: ...T3 FP737S Dual function LCD Monitor Service Guide Alignment Procedure 7 Confidential C Fix DVI BD with spacers D Place I F BD and SPS BD in the BKT E Screws on the interface power board toltal 10 scre...

Page 8: ...Q7T3 FP737S Dual function LCD Monitor Service Guide Alignment Procedure 8 Confidential...

Page 9: ...Q7T3 FP737S Dual function LCD Monitor Service Guide Alignment Procedure 9 Confidential F Plastic fixture on the interface board and place D sub cover G Screw D SUB cover on the BKT...

Page 10: ...Q7T3 FP737S Dual function LCD Monitor Service Guide Alignment Procedure 10 Confidential H Two gaskets at the bottom of BKT I Taping LVDS FFC on the panel...

Page 11: ...Q7T3 FP737S Dual function LCD Monitor Service Guide Alignment Procedure 11 Confidential J Place BKT on the panel and fasten FFC with I F BD K Place an iron cover and screw it on BKT...

Page 12: ...Q7T3 FP737S Dual function LCD Monitor Service Guide Alignment Procedure 12 Confidential L Two screws on panel right side M Two screws on panel left side...

Page 13: ...Q7T3 FP737S Dual function LCD Monitor Service Guide Alignment Procedure 13 Confidential N Paste aluminum tape on the backlight wire hole O Spring on control board and fix CTRL BD on BZL...

Page 14: ...Q7T3 FP737S Dual function LCD Monitor Service Guide Alignment Procedure 14 Confidential P Contorl board 9pin wire dressing Q Screw up uppercase with 5 screw...

Page 15: ...Q7T3 FP737S Dual function LCD Monitor Service Guide Alignment Procedure 15 Confidential R Screw column with uppercase with 2 screw...

Page 16: ...ms and get some information about this monitor and the best function is to offer users an easy method to set all adjustable items well just by pressing one key we called it Auto key which can auto adj...

Page 17: ...FP737S Dual function LCD Monitor Service Guide Circuit Operation Theory 2 Confidential Mst 8131B 140MHz Single Link TMDS MTV312M 64 AJ Clock Generator XGA 1280 1024 LCM DVI D D SUB Keypad IIC 140MHz...

Page 18: ...OM Those data related to LCD monitor specification PC can read them by SDA and SCL serial communication for I2C communication for DDC2B 2 Mst8131B IC There are A D Scaling OSD MCU functions in the Mst...

Page 19: ...is circuit fig 2 is designed to inhibit electrical and magnetic interference for meeting FCC VDE VCCI standard requirements Fig 2 EMI Filter Rectifier and filter Isolation power transformer Rectifier...

Page 20: ...tion LCD Monitor Service Guide Circuit Operation Theory 5 Confidential 2 Rectifier and filter AC Voltage 90 264V is rectified and filtered by BD601 C605 See Fig 3 and the DC Output voltage is 1 4 AC i...

Page 21: ...y is stored in the transformer During Q601 turn off period the stored energy is delivered to the secondary of transformer R607 C607 and D601 is a snubber circuit R615 is current sense resistor to cont...

Page 22: ...hen the current set point falls below a given value The output power demand diminishes the IC automatically enters the so called skip cycle mode and provides excellent efficiency Fig 6 6 Feedback circ...

Page 23: ...of the control board are a push button and a LED a Push button It s a simple switch function pressing it for ON to do the auto adjustment function releasing it for OFF to do nothing c LED It indicate...

Page 24: ...ation Input Voltage 15V Input Current 2A max ON OFF Voltage 3 3V PWM Duty 3 3V 47KHz Output Requirement Max Output Current 15mA Min Output Current 6mA Lamp Working Voltage 600Vrms Open Lamp Voltage 17...

Page 25: ...onfidential 3 Circuit Operation Theorem 3 1 ON OFF SWITCH The turn on voltage was controlled by R756 and R757 The inverter was turned on or off by the switching transistors Q761 and Q757 Also regulato...

Page 26: ...roller C765 and R765 decide the working frequency BLT_ADJ signal is from control board control pulse width then decide how much energy delivery to CCFL also decide CCFL brightness Q741 and Q742 be the...

Page 27: ...oscillate When the DC power inject Q759 or Q760 will turns on and the current Ic increases After a period the transistor will leave the saturation status and Vce increase The result causes the voltage...

Page 28: ...2 4 HALF SINE SHOCK 6 2 3 Packing Configuration 7 2 3 1 Container Specification 7 2 3 2 Carton Specification 8 2 3 3 Pallet Specification 8 2 3 4 Container Carrying Capacity 8 2 4 Electrostatic Disch...

Page 29: ...ta Area with full white pattern 17 4 1 2 Video Performance 18 4 1 3 Light Output 18 4 1 4 Brightness Adjustment Range 18 5 Physical Specifications 18 5 1 Physical Dimension Appearance 18 5 1 1 Overall...

Page 30: ...al 19 6 3 2 Outside Cabinet access to the following elements 19 6 3 3 Cover Removal Access 19 6 4 Equipment Tools Required 19 6 4 1 Standard Test Equipment 19 6 4 2 Documentation 19 6 5 Electrical Emi...

Page 31: ...ft decreasing adjust and hot key of Contrast adjustment f Right key Select right increasing adjust and hot key of Brightness adjustment OSD window for control and information display with 8 languages...

Page 32: ...quency Hz Status 5 26 6 0 6G 26 6 50 0 016 50 500 1 5G Sweep times 1 sweep Per Axis X Y and Z Axis One major resonance dwell is required for each axis Total dwell time at each resonance point shall be...

Page 33: ...dge radiating from corner 5 3 2 A flat drop with impact on the rear A flat drop with impact on the front A flat drop with impact on the right A flat drop with impact on the left A flat drop with impac...

Page 34: ...2 352 2 352 2 352 Interior Measurement mm Height 2 394 2 394 2 699 Volume Cubic Meter 33 2 67 74 76 4 Width 2 340 2 340 2 340 Door opening mm Height 2 280 2 280 2 585 Length 5 890 12 000 12 000 Width...

Page 35: ...rt Type Pallet A Pallet B Pallet C Pallet D Length 812 812 406 406 Width 836 1254 836 1254 Shipping Pallet Dimension mm Height 115 115 115 115 Length X X X X Width X X X X Air Transport Pallet Dimensi...

Page 36: ...EN60950 Fimko EN60950 2 6 EMI Requirements 1 This display unit complies with the following EMC rules and regulations FCC compliance FCC Rule Part 15 Subpart B Class B VCCI compliance VCCI Rule Class 2...

Page 37: ...trol knobs are accepted 6 Plastic components 25g shall not contain retardants of organically bound chloride or bromide 2 9 Environment Protection Design Product is Per ES 715 c49 Environment Design Gu...

Page 38: ...lock 18 TMDS RX0 7 DDC Data 19 TMDS Ground 8 Floating 20 Floating 9 TMDS RX1 21 Floating 10 TMDS RX1 22 TMDS Ground 11 TMDS Ground 23 TMDS Clock 12 Floating 24 TMDS Clock 3 1 1 2 Cable length 1500mm 2...

Page 39: ...Macintosh 1152x900 61 80 N 66 00 N 94 50 SUN 66 1152x900 71 81 N 76 14 N 108 00 SUN 1280x1024 64 00 P 60 00 P 108 00 VESA 1280x1024 75 83 N 71 53 N 128 00 IBM1 1280x1024 80 00 P 75 00 P 135 00 VESA 12...

Page 40: ...k Color gain Red Green Blue OSD position Vertical Horizontal Multi language selection OSD time Input selection analog DVI Recall function Color Recall Recall All 3 5 Power Supply Requirements 3 5 1 In...

Page 41: ...l off None or Only one exist 1W under 115Vac 2W under 264Vac Amber 3 sec 3 6 Specification of Inverter The backlight system is an edge lighting type with 4 CCFLs Cold Cathode Fluorescent Tube The char...

Page 42: ...ising Time 4 5 Falling Time 12 20 Response Time Note 1 msec Raising Falling 16 25 Red x 0 61 0 641 0 67 Red y 0 31 0 342 0 37 Green x 0 26 0 292 0 32 Green y 0 58 0 611 0 64 Blue x 0 11 0 147 0 17 Col...

Page 43: ...ch CR 10 Normal E y x 0 Right 90 Up 180 Left 270 Down 3 Contrast Ratio CR is defined mathematically as 0 0 at Min el Black Lev in Luminance Max Level White in Luminance o o 4 Response time TrR measure...

Page 44: ...oint in A cd m2 LB Luminance of measured point in B cd m2 at Viewing Angle o 0 0 o 6 Brightness Uniformity of these 9 points is defined as below 5 1 10 90 50 90 10 50 2 4 3 6 7 8 9 Brightness Uniformi...

Page 45: ...position the light output of WHITE pattern shall be increased more than 40cd 5 Physical Specifications 5 1 Physical Dimension Appearance 5 1 1 Overall Dimensions 375mm W X 370mm H X 155mm D 5 1 2 Oute...

Page 46: ...ting Controls AC Inlet 6 3 3 Cover Removal Access All sub assemblies and internally adjustable components may be accessed by removing the base and the rear cover 6 4 Equipment Tools Required 6 4 1 Sta...

Page 47: ...ering Specification 20 Confidential Appendix 1 Shipment Conditions ITEM State Power ON Brightness 90 Contrast 50 OSD Timeout 20s OSD Language English OSD Image size Full Screen OSD Color temp SRGB MOD...

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Page 50: ...able Power off Yes Turn on power No Does cable plugs in No Check all of wire then turn on power connector switch again Yes Does power stable No Check Power BD Yes Is LED light green orange No Check co...

Page 51: ...Shooting 2 Confidential 2 BUTTON function 2 1 Control Board OSD is not working Yes Is control BD connecting No Plug control BD then retry Yes Is bottom switch normally Yes Replace control BD then retr...

Page 52: ...Q7T3 FP737S Dual function LCD Monitor Service Guide Trouble Shooting 3 Confidential 3 OSD function OSD doesn t work Is control BD working No Replace control BD Check interface BD...

Page 53: ...LT_ADJ Plug CN701 again or checking I F BD Turn on level existed BLT_ON Insert them again Check CN752 CN753 was pluged properly Plug CN601 again or checking PW BD Replace IC751 Q751 Replace new fuse R...

Page 54: ...Does cable plugs in No Check all of wire then turn on power connector switch again Yes Does power stable No Check Power BD Yes Is LED light green orange No Check control BD Yes Is LED status normal N...

Page 55: ...CONTRAST 50 BRIGHTNESS 90 OSD TIME 20 COLOR sRGB 8 When Factory mode is disable burn in mode off then power off after power on will enter user mode C Color balance adjustment 1 Setup input timing VGA_...

Page 56: ...ill send 0x7C IIC slave address and then following 4 bytes command I2C Send Command Byte1 Byte2 Byte3 Byte4 Write Contrast CA 55 Data checksum Write Brightness CA 56 Data checksum Write Red Gain CA 57...

Page 57: ...r R Gain data from NVRAM A3 6C XX checksum Read User G Gain data from NVRAM A3 6D XX checksum Read User B Gain data from NVRAM A3 6E XX checksum Change Color Temperature to Bluish CC 1 XX checksum Cha...

Page 58: ...A3 98 XX checksum Read EEPROM Volume A3 99 XX checksum Table 1 Incoming display mode Input timing Multi scan operation Resolution Horizontal Frequency KHz Vertical Frequency Hz Dot Clock Frequency MH...

Page 59: ...Q7T3 AUO Panel LCD Monitor Service Guide Alignment Procedure 5 Fig 2 Burn In Mode Off 2 Wire Dressing a LVDS Cable with clip...

Page 60: ...Q7T3 AUO Panel LCD Monitor Service Guide Alignment Procedure 6 b LVDS Cable with tape c Lamp wire with clip...

Page 61: ...Q7T3 AUO Panel LCD Monitor Service Guide Alignment Procedure 7 d Add 4 Pcs crew to BKT between panel grounding e Al Foil Mylar on the shielding cover...

Page 62: ...Q7T3 AUO Panel LCD Monitor Service Guide Alignment Procedure 8 f Spacer g Signal cable with clip...

Page 63: ...Q7T3 AUO Panel LCD Monitor Service Guide Alignment Procedure 9 h Bracket Cover i Plug under AC socket...

Page 64: ...Q7T3 AUO Panel LCD Monitor Service Guide Alignment Procedure 10 j Main Grounding Wire k Control BD wire conductive tape change to Clip...

Page 65: ...Q7T3 AUO Panel LCD Monitor Service Guide Alignment Procedure 11 l Shielding cover conductive tape m Bracket with panel grounding spring...

Page 66: ...Q7T3 AUO Panel LCD Monitor Service Guide Alignment Procedure 12 n Ctrl BD with panel grounding spring 3 Add Glue a C605...

Page 67: ...Q7T3 AUO Panel LCD Monitor Service Guide Alignment Procedure 13 b C603 C604 L606 L607 c C615...

Page 68: ...m PS Subject ASS Y DRAWING Q7T3 767S Part No 99 L8372 000 Rev 0 Doc No 99 L8372 000 C3 328 001 Project Code 99 L8372 001 Component Part No Page 1 of 1 Model Name Q7T3 Form No ACM0 0B 003 24 010918 1 R...

Page 69: ...3 INPUT OUTPUT SIGNAL SPECIFICATION 8 3 1 INPUT SIGNAL REQUIREMENTS 8 3 2 FUNCTION 9 3 3 NUMBER OF DISPLAY COLORS 226K COLOR NUMBERS 10 3 4 ADJUSTMENT FUNCTION 10 3 5 DISPLAY POWER MANAGEMENT SYSTEM D...

Page 70: ...Q7T3 AUO panel LCD Monitor Service Guide Engineering Specification 2 Table of Contents 6 4 EQUIPMENT TOOLS REQUIRED 16 6 5 ELECTRICAL EMISSION AND ENERGY SAVING SUMMARY FOR TCO99 16...

Page 71: ...ndow for control and information display with 8 languages selection DPMS Display Power Management System Power on off indicator Tilt base with tilt function from 0 to 25 degree DDC2B function supporte...

Page 72: ...well time at each resonance point shall be 15 minutes B Random Vibration Frequency Hz Slope dB Oct Spectrum Level g2 Hz 5 100 0 0 015 100 200 6 200 0 0038 Equivalent to 1 47 G rms Duration 30 Minutes...

Page 73: ...p with impact on the bottom A flat drop with impact on the top After test there is no electrical and mechanical damage permitted 2 2 3 HALF SINE SHOCK Test conditions Test unit 2 sets Each unit has to...

Page 74: ...804 6 804 4 627 Weight Kegs Tare 129 129 129 Payload 6 675 6 675 4 498 Length 3 048 3 048 3 048 Width 2 260 2 260 2 082 Interior Measurement mm Height 2 438 2 997 1 625 Volume Cubic Meter 17 19 19 2...

Page 75: ...rge and 15KV for air discharge of Electrostatic Discharge and meet the acceptance criteria as specified in XXXISO 9241 3XXX should be IEC 801 2 2 5 Safety Requirements The display unit complies with t...

Page 76: ...me type of plastic 4 Painting of Plastic Any plastic components that weight 100g shall not be painted lacquer or vanished so that the paint lacquer or vanish in dry matter exceed 1 weight of the plast...

Page 77: ...nction 3 2 1 Support timing This Interface board is designed to operate in any of the following video mode Incoming display mode Input timing Multi scan operation Resolution Horizontal Frequency KHz V...

Page 78: ...0 VESA 1280x1024 81 18 N 76 16 N 135 09 SPARC2 3 3 Number of display colors 226K color numbers 3 4 Adjustment function Luminance Brightness Contrast Geometry H Position V Position Pixel Clock Phase Co...

Page 79: ...rrent shall be less than the ratings of its critical components including Power switch fuse rectifiers and surge limiting device for all conditions of line voltage 5 Regulator Efficiency 70 minimum me...

Page 80: ...ight 0 CR 10 70 Deg 25 2 5 C 0 0 Tr Tf 4 12 ms ms Response Time Rise Time Fall Time Cross Talk 0 0 Tr Tf 16 ms White Luminance Center point at CCFL 7 0mA 260 cd m Wx 0 28 0 31 0 34 White Wy 0 30 0 33...

Page 81: ...se time TrR measures the transition time of L1 relative luminance from white to black state from 90 to 10 see graph below 100 90 TrR TrD WHITE BLACK 10 0 t WHITE TrD measures the transition time of L1...

Page 82: ...ic shielding between inverter and module to avoid the interference 2 Definition of the lamp lifetime Luminance L under 50 of specification Starting Lamp Voltage VS 1700V Ta 0 VS 1200V Ta 25 4 Function...

Page 83: ...anufacture data 3 Agency Approvals 4 Power Ratings 5 4 2 Controls Connectors 1 DC power adapter input abbreviated labels 2 User s Controls standard print 5 5 Packaging 5 5 1 Carton Dimension 385mm W X...

Page 84: ...adapter 6 4 2 Documentation A service manual will be available which covers all service requirements A users manual written in Japanese German Italian Spanish France and English will be available to...

Page 85: ...Q7T3 AUO panel LCD Monitor Service Guide Engineering Specification 17 Fig 1 Physical Dimension Front View and Side view...

Page 86: ...9 L8372 000 C2 204 004 INTERFACE BOARD 1 5 JAMSON LIU DAVEN WU 48 L8301 S11 S11 ANGEL HU Size Q7T3 FP767S 99 L8372 001 0 Tuesday February 11 2003 NA Optical Points Screw Holes H4 HOLE V8 1 2 3 4 5 6 7...

Page 87: ...1 47 DN1 BAV99 1 3 2 R14 100 TP5 TP15 R4 56 R17 10K C1 0 1U 16V K R20 10K R13 22 TP17 U2A 74LVC14A 1 2 14 7 U1 AT24C02A A0 1 A1 2 A2 3 VSS 4 VCC 8 WP 7 SCL 6 SDA 5 TP7 R19 4 7K DN4 BAV70LT1 2 3 1 C12...

Page 88: ...RT_D0 45 GPIO6 EXTCLK 46 GPIO7 47 GPIO10 TCON_ROE3 49 GPIO11 50 GPIO12 51 GPIO13 52 DCLK TCON_OCLK 118 DEN TCON_ECLK 115 DVS TCON_FSYNC 117 DHS TCON_LP 116 RXC 195 RXC 194 REXT 174 TCON_OPOL 120 TCON_...

Page 89: ...esday February 11 2003 NA PWM output first it must be H when no work OPEN OPEN R60 1K L23 C75 0 1U 50V Z C64 100P 50V J L20 U5 IRU1206 25CY IN 1 GND 2 OUT 3 GND 4 C79 10U 16V 1 2 C68 0 1U 16V K J4 206...

Page 90: ...LVDM83A VCC 1 TXIN5 2 TXIN6 3 TXIN7 4 GND 5 TXIN8 6 TXIN9 7 TXIN10 8 VCC 9 TXIN11 10 TXIN12 11 TXIN13 12 GND 13 TXIN14 14 TXIN15 15 TXIN16 16 VCC 17 TXIN17 18 TXIN18 19 TXIN19 20 GND 21 TXIN20 22 TXIN...

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Page 92: ......

Page 93: ...Turn on power No Does cable plugs in No Check all of wire then turn on power connector switch again Yes Does power stable No Check Power BD Yes Is LED light green orange No Check control BD Yes Is LE...

Page 94: ...OSD is not working Yes Is control BD connecting No Plug control BD then retry Yes Is bottom switch normally Yes Replace control BD then retry No Replace Control BD Is OSD working No Check Interface BD...

Page 95: ...N701 again or checking I F BD Turn on level existed BLT_ON Insert them again Check CN752 CN753 was pluged properly Plug CN601 again or checking PW BD Replace IC751 Q751 Replace new fuse Replace new fu...

Page 96: ...et all adjustable items well just by pressing one key we called it Auto key which can auto adjusting all controlled items Q7T3 FP767 also offer DDC2 function to meet VESA standard II Block diagram The...

Page 97: ...B data the Hsync Vsync and pixel clock to LCD panel driver IC by LVDS transmitter MCU also embedded in Gm2120 offers H W DDC2Bi function controls system processing EEPROM is stored DDC data OSD common...

Page 98: ...ort DDC2B 3 EEPROM We use 24C16 to store all the adjustable data and user settings 4 FLASH ROM To stored the source code which is accessed by MCU to run program A 2 Power board diagram Fig 1 1 EMI Fil...

Page 99: ...el LCD Monitor Service Guide Circuit Operation Theory 4 Fig 2 2 Rectifier and filter AC Voltage 90 264V is rectified and filtered by BD601 C605 See Fig 3 and the DC Output voltage is 1 4 AC input See...

Page 100: ...in the transformer During Q601 turn off period the stored energy is delivered to the secondary of transformer R607 C607 and D601 is a snubber circuit R615 is current sense resistor to control output p...

Page 101: ...ion They are used to detect the output voltage change and be the primary and secondary isolation When output voltage changes the feedback voltage will be compared and duty cycle will be decided to con...

Page 102: ...Voltage 15V Input Current 2A max ON OFF Voltage 3 3V PWM Duty 3 3V 47KHz Output Requirement Max Output Current 15mA Min Output Current 6mA Lamp Working Voltage 600Vrms Open Lamp Voltage 1700Vrms Frequ...

Page 103: ...Circuit Operation Theorem 3 1 ON OFF SWITCH The turn on voltage was controlled by R756 and R757 The inverter was turned on or off by the switching transistors Q761 and Q757 Also regulator IC751 is co...

Page 104: ...nd R765 decide the working frequency BLT_ADJ signal is from control board control pulse width then decide how much energy delivery to CCFL also decide CCFL brightness Q741 and Q742 be the buffer to ri...

Page 105: ...en the DC power inject Q759 or Q760 will turns on and the current Ic increases After a period the transistor will leave the saturation status and Vce increase The result causes the voltage of primary...

Page 106: ...ion 7 Adjust the settings to following values CONTRAST 50 BRIGHTNESS 90 OSD TIME 20 COLOR sRGB 8 When Factory mode is disable burn in mode off then power off after power on will enter user mode C Colo...

Page 107: ...will send 0x7C IIC slave address and then following 4 bytes command I2C Send Command Byte1 Byte2 Byte3 Byte4 Write Contrast CA 55 Data checksum Write Brightness CA 56 Data checksum Write Red Gain CA 5...

Page 108: ...r R Gain data from NVRAM A3 6C XX checksum Read User G Gain data from NVRAM A3 6D XX checksum Read User B Gain data from NVRAM A3 6E XX checksum Change Color Temperature to Bluish CC 1 XX checksum Cha...

Page 109: ...cksum Read EEPROM OSD Timer A3 98 XX checksum Read EEPROM Volume A3 99 XX checksum Table 1 Incoming display mode Input timing Multi scan operation Resolution Horizontal Frequency KHz Vertical Frequenc...

Page 110: ...Q7T3 CPT Panel LCD Monitor Service Guide Alignment Procedure 5 Fig 1 Factory Mode On Fig 2a Burn In Mode Button...

Page 111: ...Q7T3 CPT Panel LCD Monitor Service Guide Alignment Procedure 6 Fig 2b Burn In Mode ON 2 Wire Dressing a RSDS Cable...

Page 112: ...Q7T3 CPT Panel LCD Monitor Service Guide Alignment Procedure 7 b Lamp wire with clip c Add 4 Pcs crew to BKT between panel grounding...

Page 113: ...Q7T3 CPT Panel LCD Monitor Service Guide Alignment Procedure 8 d Al Foil Mylar on the shielding cover e Spacer...

Page 114: ...Q7T3 CPT Panel LCD Monitor Service Guide Alignment Procedure 9 f Signal cable with clip g Bracket Cover...

Page 115: ...Q7T3 CPT Panel LCD Monitor Service Guide Alignment Procedure 10 h Plug under AC socket i Main Grounding Wire...

Page 116: ...Q7T3 CPT Panel LCD Monitor Service Guide Alignment Procedure 11 j Control BD wire conductive tape change to Clip k Shielding cover conductive tape...

Page 117: ...Q7T3 CPT Panel LCD Monitor Service Guide Alignment Procedure 12 l Bracket with panel grounding spring m Ctrl BD with panel grounding spring...

Page 118: ...Q7T3 CPT Panel LCD Monitor Service Guide Alignment Procedure 13 3 Add Glue a C605 b C603 C604 L606 L607...

Page 119: ...Q7T3 CPT Panel LCD Monitor Service Guide Alignment Procedure 14 c C615...

Page 120: ...System PS Subject ASS Y Drawing Part No 99 L8372 CBE Rev 0 Doc No 99 L8372 CBE C3 328 001 Project Code 99 L8372 001 Component Part No Page 1 of 1 Model Name Q7T3 Form No ACM0 0B 003 24 010918 1 Releas...

Page 121: ...ontrol the adjustable items and get some information about this monitor and the best function is to offer users an easy method to set all adjustable items well just by pressing one key we called it Au...

Page 122: ...ols system processing EEPROM is stored DDC data OSD common data and user mode data Flash Rom is stored the source code which is accessed by MCU to run program b IC introduction 1 DDC Display Data Chan...

Page 123: ...the adjustable data and user settings 4 FLASH ROM To stored the source code which is accessed by MCU to run program A 2 Power board diagram Fig 1 1 EMI Filter This circuit fig 2 is designed to inhibit...

Page 124: ...el LCD Monitor Service Guide Circuit Operation Theory 4 Fig 2 2 Rectifier and filter AC Voltage 90 264V is rectified and filtered by BD601 C605 See Fig 3 and the DC Output voltage is 1 4 AC input See...

Page 125: ...in the transformer During Q601 turn off period the stored energy is delivered to the secondary of transformer R607 C607 and D601 is a snubber circuit R615 is current sense resistor to control output p...

Page 126: ...ent set point falls below a given value The output power demand diminishes the IC automatically enters the so called skip cycle mode and provides excellent efficiency Fig 6 6 Feedback circuit PC123 is...

Page 127: ...rol board are a push button and a LED a Push button It s a simple switch function pressing it for ON to do the auto adjustment function releasing it for OFF to do nothing c LED It indicates the DPMS s...

Page 128: ...Voltage 15V Input Current 2A max ON OFF Voltage 3 3V PWM Duty 3 3V 47KHz Output Requirement Max Output Current 15mA Min Output Current 6mA Lamp Working Voltage 600Vrms Open Lamp Voltage 1700Vrms Frequ...

Page 129: ...Circuit Operation Theorem 3 1 ON OFF SWITCH The turn on voltage was controlled by R756 and R757 The inverter was turned on or off by the switching transistors Q761 and Q757 Also regulator IC751 is co...

Page 130: ...and R765 decide the working frequency BLT_ADJ signal is from control board control pulse width then decide how much energy delivery to CCFL also decide CCFL brightness Q741 and Q742 be the buffer to r...

Page 131: ...en the DC power inject Q759 or Q760 will turns on and the current Ic increases After a period the transistor will leave the saturation status and Vce increase The result causes the voltage of primary...

Page 132: ...nected PC5V exists Q4 will ON That will make 3 3_M 3 3V DVIPC5VGND Q2 2N3906 3 2 1 C1 47P J R24 10K U1 AT24C02 A0 1 A1 2 A2 3 GND 4 VCC 8 WP 7 SCL 6 SDA 5 R4 75 C49 0 01U K D4 BZV55 C5V1 A K R14 100 R...

Page 133: ...7 0 1U R201 1M C13 0 1U L3 220 OHM R28 30K C23 0 1U L2 220 OHM C11 0 1U C14 0 1U C34 4 7P C U2 MST8116B RIN0 63 GIN0 60 SOGIN0 61 BIN0 58 RIN0M 62 GIN0M 59 BIN0M 57 HSYNC0 37 VSYNC0 38 REXT 52 REFP 66...

Page 134: ...Y2 12MHZ C46 22P J R303 1k R0603 TP27 RN4 4 7K 1 2 3 4 8 7 6 5 CON1 2060091109 1 2 3 4 5 6 7 8 9 J4 2072060207 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SOCKET P N 22 10079 044 U5 MTV312MV64 DA2 P5 2 1 DA1 P5...

Page 135: ...Rev Benq Corporation OEM ODM Model Name 99 L8372 000 C3 304 006 INTERFACE BOARD 4 6 ARSENIO LIU ARIES CHU 48 L8301 S72 S72 ANGEL HU Size Q7T3 99 L8372 001 0 Tuesday December 23 2003 OEM ODM G 1 S 2 D...

Page 136: ...9 L8372 000 C3 304 006 INTERFACE BOARD 5 6 ARSENIO LIU ARIES CHU 48 L8301 S72 S72 ANGEL HU Size Q7T3 99 L8372 001 0 Tuesday December 23 2003 OEM ODM Optical Points Screw Holes H1 HOLE V8 1 2 3 4 5 6 7...

Page 137: ...te Sheet o f Project Code Reviewed By Approved By Prepared By Model Name PCB P N PCB Rev Benq Corporation OEM ODM Model Name 99 L8372 000 C3 304 006 INTERFACE BOARD 6 6 ARSENIO LIU ARIES CHU 48 L8301...

Page 138: ...n power No Does cable plugs in No Check all of wire then turn on power connector switch again Yes Does power stable No Check Power BD Yes Is LED light green orange No Check control BD Yes Is LED statu...

Page 139: ...t working Yes Is control BD connecting No Plug control BD then retry Yes Is bottom switch normally Yes Replace control BD then retry No Replace Control BD Is OSD working No Check Interface BD 3 OSD fu...

Page 140: ...701 again or checking I F BD Turn on level existed BLT_ON Insert them again Check CN752 CN753 was pluged properly Plug CN601 again or checking PW BD Replace IC751 Q751 Replace new fuse Replace new fus...

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