BenQ 9H.V1875.TBE Service Manual Download Page 76

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Color is not optimal

Color is not optimal

Miss color

Color shift

Replace the signal cable

Pull out the signal cable

and check the screen

color display is normal?

The end

Replace the signal cable or PC

Reset the factory mode

In the user mode, set the” color

settings” until customer satisfy

Replace the main board

Summary of Contents for 9H.V1875.TBE

Page 1: ...roduct Service Manual Level 1 2 Version 1st Date 12 20 2010 Notice For RO to input specific Legal Requirement in specific NS regarding to responsibility and liability statements Please check BenQ s eS...

Page 2: ...duct Overview 9 5 1 Monitor Specifications 9 5 2 Packing 11 5 3 Customer Acceptance 13 Level 1 Cosmetic Appearance Alignment Service 15 Visual Inspection Cleaning 15 Software Firmware Upgrade Process...

Page 3: ...al Micro mirror Device DRAM Dynamic RAM DVI Digital Visual Interface DVI D Digital Visual Interface digital DVI I Digital Visual Interface Integrated E EEPROM Electrically Erasable and Programmable Re...

Page 4: ...color signals for TV By mixing levels of R G and B all colors Y C are ROM Read Only Memory S SDA Data signal on I2 C bus SDRAM Synchronous DRAM SW Sub Woofer Software T THD Total Harmonic Distortion V...

Page 5: ...any time When repairing the circuit board please follow the requirement of RoHS and refer to the circuit diagram and repairing process that attached in the Service Manual The method of firmware updat...

Page 6: ...ng any parts please confirming the RoHS requirement before replace them 2 2 Safety Warning and Notice Installation 1 Do not use your monitor under any of the following environmental conditions Extreme...

Page 7: ...electric shock do not dissemble or repair the monitor 7 If a bad smell or an abnormal sound appears to come from the monitor contact your nearest BenQ service center for assistance immediately Cleanin...

Page 8: ...t information you require to start up and run your LCD monitor This specification defines the requirements for the 24 MICROPROCESSOR based Multi mode supported high resolution color LCD monitor This m...

Page 9: ...Video Senseye Noise reduction Flesh tone ACE Dynamic backlight Aspect ratio Normal 4 3 Zoom1 Zoom2 2 35 1 Wide 16 9 Panorama MPEG Noise Reduction Yes 24P True Cinema no frequency doubling Yes Audio So...

Page 10: ...utput terminals Video out No SPDIF out 1 Headphone jack 1 Power Power input 100 240 V Power consumption 60W Standby mode 0 5W Dimensions Dimensions with stand W x H x D mm 587 3mm W x 424 7mm H x184 9...

Page 11: ...11 5 2 Packing When packing the monitor into the carton please follow the pictures as below 1 Using the EPE bag to pack the monitor without base 2 Using the EPS to pack the monitor...

Page 12: ...12 3 Putting the power cord remote control screws battery and user manual in the position as the picture shows below User manual The remote control and screws The battery The power cord...

Page 13: ...that judgment and experience indicate is likely to result in hazardous or unsafe conditions for individuals using maintaining or depending upon the product 5 2 Major defect A major defect is a defect...

Page 14: ...s adapters and the like and being inspected as a part of the complete product must be included in the evaluation The evaluation must be within the limits of the product specification and for not speci...

Page 15: ...Inspection Cleaning Item Description ID SPEC Remark 1 Bezel printing Offset 0 2mm Tilt 0 2mm Offset include X Y axis 2 Bezel printing Offset 0 2mm Tilt 0 2mm Offset include X Y axis 3 Component Mylar...

Page 16: ...m Tilt 0 2mm Offset include X Y axis 5 The height difference with left and right side 5 AR AL 6 machines Twist specifications 3 R L 7 Black side specifications Shift Tolerance 2 1 2 1 2 1 D B C A C A...

Page 17: ...the panel and bezel must be symmetrical the difference 0 5mm 9 The gap of the Bezel and rear cover specification A 0 5 3 0 1 0 A A 10 The STEP of the Bezel and rear cover 5 0 3 0 A A 11 The gap of the...

Page 18: ...s a benchmark 13 The gap of the Bezel OSD and rear cover ID SPEC 0 5 mm 2 0 15 0 A A 14 The step of the Bezel OSD and rear cover 2 0 2 0 A A The compages accords to bezel template as a benchmark After...

Page 19: ...s and bezel must be evenly when assembled the key press 17 The gap of the Rear cover VESA Hole position 4 0 R L 4 0 B T 18 The gap of the Mylar and rear cover compages 3 0 R L A A 3 0 B T A A 19 The g...

Page 20: ...gap of the Scart Connector and rear cover 7 0 R L A A 7 0 B T A A Cable can t Insert no bottom 22 The gap specification of the S Video Audio in and rear cover 7 0 R L A A 7 0 B T A A Cable can t Inser...

Page 21: ...21 24 The gap of the Side HDMI and rear cover 0 1 R L A A 4 0 B T A A 25 The gap of the Side Headphone and rear cover 0 1 R L A A 0 1 B T A A 26 0 1 R L A A 4 0 B T B B 27 0 1 R L A A 4 0 B T B B...

Page 22: ...A A 6 0 B T A A 29 The STEP of the AC Socket and rear cover compages ID SPEC E24 1 2mm 2 1 2 0 A A Do not see the internal bracket 30 The gap of the Hinge Cover and rear cover Gap Spec A 0 15 mm 15 0...

Page 23: ...num plaque and stand Gap Spec A 0 2 mm 2 0 2 0 A A 33 The STEP of the aluminum plaque and stand ID SPEC 0 5 mm 15 0 15 0 A A 34 Backward force M 3 0 5 1 Forward force N 3 0 5 1 35 Machine stress shaki...

Page 24: ...24 36 degrees of pitch and lean back 0 0 0 0 5 1 5 15 l 5 1 5 5 p eanback itch...

Page 25: ...1 Note the version of this F W is V007 before you change the software file name 2 The software file name must be changed or TV can t detect the F W Step 2 F W Upgrade There are two methods to upgrade...

Page 26: ...as figure2 4 Figure2 4 Step 3 Check the F W version and reset to default 3 1 Unplug the U disk And press menu 1999 to enter factory model to check whether the TV present FW Version is the same as the...

Page 27: ...r menu as figure3 6 else skip to step2 to redo upgrade Method 2 Step1 AC on and turn on TV by remote control or right side power button of TV monitor as figure2 1 1 Figure2 1 1 Step2 Plug U disk with...

Page 28: ...o automatic upgrade as figure2 2 2 Fig2 2 2 2 2 After the progress is 100 unplug U disk from TV and enter factory model to check whether the FW version is correct and do factory in user menu As to the...

Page 29: ...OSD menu 2 VOL Volume button Volume up Navigates to the right OSD Volume down Navigates to the left OSD 3 CH Channel button Channel up Moves up OSD Channel down Moves down OSD 4 INPUT button Selects...

Page 30: ...on the setting your have chosen and the original aspect ratio of the input image Press Zoom on the remote control to cycle through different aspect ratios Auto Normal 4 3 Wide Video source HD 4 3 X Vi...

Page 31: ...V is connected to a computer via D Sub or HDMI only 16 9 and 4 3 are available for selection If the input video signal is in letter box format select Zoom to obtain a wider viewable area To avoid poss...

Page 32: ...n on OSD Available menu items may vary depending on the selected input source Picture menu Item Function Picture Mode Vivid Suitable for viewing in brighter environments Color contrast and brightness...

Page 33: ...ast Same as above Colour Temperature Same as above Auto Configuration Adjusts all related settings automatically by the TV itself Position Adjusts the horizontal and vertical positions of the image in...

Page 34: ...Audio Description Adjusts the volume of Audio Description Channels menu Item Function Tuner Mode Toggles between two signal sources Antenna and Cable Country Selects the area where this TV is installe...

Page 35: ...bottom respectively and by 3 from the left and the right respectively When a computer is connected only two picture formats Full Screen and 4 3 are available Time Sets the local date and time dependi...

Page 36: ...to start Time shift recording If this is the first time you use the USB device the TV will perform the following tasks please follow the on screen instructions Detects whether the available empty spa...

Page 37: ...e The USB external storage device must be in the FAT32 file system Hotel Mode Menu 100108 Note When there is any change from OSD settings the system need to be DC rebooted Function Option Power key lo...

Page 38: ...Offset 125 Scaler G Offset 125 Scaler B Offset 125 Burn in No EEPROM Init Press Back LIT time 131Hr BlackLight Max 0 BlackLight Max 196 Language English Preset Press OAD Enable Yes VGA Switch EDID BAU...

Page 39: ...upported computer D sub VGA input signal resolutions Resolution Horizontal Freq kHz Vertical Freq Hz Pixel Freq MHz Note 640 x 480 60 31 5 25 7 VESA 640 x 480 72 37 86 31 50 VESA 640 x 480 75 37 5 31...

Page 40: ...ttp cs tpv com cn hello1 asp for the latest information Item Description Qty Unit 1 DECO L24WTV TBENQ4 1 PCS 2 LOGO BENQ 1 PCS 3 BEZEL L24WTV TBENQ4 1 PCS 4 SPEAKER 1 PCS 6 PANEL 1 PCS 7 IR BOARD 1 PC...

Page 41: ...RD MAINFRAME 4 PCS 14 0M1G1740 6120 POWER BOARD MAINFRAME 1 PCS 22 0M1G1740 10225 CR3 HINGE REAR COVER 4 PCS 25 0Q1G 130 6120 STAND HINGE 1 PCS 28 0Q1G 130 6120 PLATE_BASE BASE 8 PCS 29 0M1G1140 12125...

Page 42: ...42 Six Angles View...

Page 43: ...y during the process of uninstall And then remove the base 2 Remove the stand Remove the hinge cover and the screws in red to remove the stand Pls use a little force when remove the hinge cover by han...

Page 44: ...44 3 Remove the rear cover Remove the rear cover as follow Note The BEZEL CLIP is easy to break...

Page 45: ...45 4 Remove the key board IR board and speakers from the bezel remove the main frame from the panel 5 Remove the boards from the main frame Note The KEY CLIP is easy to break...

Page 46: ...46 6 The panel 7 The Bezel...

Page 47: ...47 Assembly SOP 1 Stick the non woven fabric on the mainframe 2 Assemble the main board power board and FFC wire...

Page 48: ...Non woven Fabric needs to stick from the front of panel metallic edging which couldn t be exceeded And Non woven Fabric need to be smoothed up and stuck in prison 4 Assemble the bezel and the panel N...

Page 49: ...49 5 Assemble the mainframe on the panel Insert the pin and tidy the wire 6 Assemble the rear cover Stick the non woven fabric on the rear cover Lock the rear cover...

Page 50: ...50 7 Assemble the hinge 8 Assemble the base 9 Assemble the hinge cover...

Page 51: ...51 Block Diagram Main Board...

Page 52: ...er Start Resistor R905 R908 R909 PWM Control IC901 Transformer AC input 5V Bridge Rectifier and Filter Feedback Circuit Rectifier diodes Power Switch Q901 Photo coupler IC902 16V D801 LED CN804 PWM Co...

Page 53: ...7 NC 1 2 3 4 8 7 6 5 S S S G D D D D C718 1500P50V OPWRSB 8 C716 NC 180P 50V PWR_5V_1 R733 10K 1 10W PWR_5V_1 FB701 120R 3000mA 1 2 DV33SB 8 12 13 15 Q702 LMBT3904LT1G 3 1 2 BRIGHT_ADJ 14 D701 NC SS3P...

Page 54: ...C4214 100N 16V C763 1UF16V DV33 R758 NC R757 1R 1 4 95 R753 4 7K1 16W DV33SB 2 8 12 13 15 C752 100UF 16V R750 22K1 16W 1104 PANEL_VCC R755 56K 1 16W D704 RGP15D PANEL_VCC_ON OFF FB4214 120R 3000mA 1...

Page 55: ...C1010 39pF 50V LNA_ON OFF MPX_P1 C1012 47N16V DV33_DVBC CI_INVALID 9 TU_FAT_IN2 U103 TS5A3157DCKR 1 2 3 4 5 6 NO GND NC COM V IN R1025 0R05 OHM RP1001 0OHM 1 16W 1 2 3 4 8 7 6 5 C1009 1N 50V FAT TU_FA...

Page 56: ...DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS DVSS...

Page 57: ...VGA_R_In AVDD3V3_ADAC0 AVDD3V3_ADAC1 TUNER_BYPASS_In 4 BP 11 AV33 Inverter C4067 1UF16V AV33 PR1P 11 C4068 1uF 16V SMD 0402 SMD 0402 AV33 IF_AGCT 4 R4051 0R05 OHM TUNER_BYPASS_In M_AOBCK C4054 100N 1...

Page 58: ...A4 A7 A9 A11 A8 VSS VDD A12 NC A14 NC N15 NC A13 VDDQ RDQ23 2_CS 2_A9 RDQ2 C4124 100N 16V RDQS3 RCLK0 RDQM3 RA7 2_WE RP4101 56R 1 2 3 4 8 7 6 5 C4129 100N 16V RDQ22 1_A5 1_BA1 RDQ1 RA6 RCKE 1_BA0 1_A...

Page 59: ...OHM 1 1 10W OXTALO R4164 10K 5 1 16W JTDO RST_N POCE1 X4150 54 000MHZ 1 2 R4189 4 7K1 16W OSDA1_1 U0RX C4150 1UF16V R4185 4 7K1 16W DV33 DV33 PAALE JTAG_DBGRQ V33 C4161 100N 16V R4229 0R05 1 10W R4169...

Page 60: ...86 4 7K1 16W M_CI_INVALID M_CI_OUTDATA0 M_CI_INDATA4 M_CI_INDATA5 CI_INDATA0 R4205 22 OHM 1 16W PCMCIA CN159 JACK 20 19 7 9 15 16 1 34 30 31 32 2 3 4 5 6 29 28 27 26 25 24 23 22 12 11 8 10 21 13 14 33...

Page 61: ...Rev Date Sheet of TPV MODEL PCB NAME T P V Top Victory Electronics Co Ltd Key Component SCT1_AUL_IN C1093 10U 16V C1096 1UF16V SCART1_RIGHT R1110 100K1 16W R1139 51K 1 16W 5 C1078 10N 50V SCART1_L_In...

Page 62: ...n 6 BLU VGASDA AV3_SY_IN R1167 100OHM1 16W C1174 10U 16V C1170 5PF 50V C1163 10N 50V C1159 10N 50V SPDIF_OUT C1164 10U 16V R1161 56R 1 16W 1 U0TX 8 ZD1162 VPORT0603100KV05 1 2 R1198 100OHM1 16W TX_RX_...

Page 63: ...Key Component DV33 SCL_2 U507 NC AOZ8804DI 1 2 3 4 5 6 7 8 9 10 CH1 CH2 VN CH3 CH4 NC NC VN NC NC AVDD1V25_HDMI R506 NC 0R05OHM1 16W HPLUGP2_ESD R4379 4 7K1 16W RX2_0 SCL_2 R510 100OHM1 16W PWR5V_1 ZD...

Page 64: ...C_MUTE GND_SOUND GND_SOUND C611 NC 100N 16V Q601 LMBT3904LT1G 3 1 2 R621 NC 10K1 16W L603 33uH C608 2 2UF 16V D606 BAS316 1 2 A K DV33SB AUDIO_MUTE U602 TPA6132A2RTER 1 3 2 16 12 8 6 4 5 11 9 13 15 14...

Page 65: ...8 29 30 O2N BL_DIMMING 9 E2P TP403 1 TP417 1 R405 NC 4 7K1 16W O1N L402 90R 400mA 1 2 4 3 O1P E3P INVERTER_ON_OFF 2 Q401 LMBT3904LT1G 3 1 2 ECKP E3N E2P DV33 TP420 1 TP407 1 DV11 2 5 AVDD3V3_LVDS E3N...

Page 66: ...1 8 PWR_5V_MCU R4342 NC R4333 NC 3V3_EX_MCU LED_R 8 R4369 NC DV33SB U4056 NC 2 1 22 21 20 19 6 5 24 9 18 17 8 10 23 3 12 11 7 4 13 14 16 15 32KOSCI 32KOSCO GPIOA0 AD0 GPIOA1 AD1 GPIOA2 AD2 GPIOA3 AD3...

Page 67: ...0V ON OFF C911 470uF 16V C908 220UF 35V C920 680pF t NR902 SCK101R55LGY 1 2 R913 47 OHM 1 4W C907 220UF 35V R914 47 OHM 1 4W C927 330uF 35V R934 1K 1 8W 5V T901 POWER X FMR 1 2 3 4 5 6 7 9 10 8 R919 0...

Page 68: ...804 NC 2N7002 CN801 CONN 1 2 3 4 5 R819 36KOHM 1 1 10W CN804 CONN 1 2 3 4 5 6 7 8 R802 180K 1 10W R824 NC 2KOHM R822 10K 1 OVP R808 1K 1 10W R834 0R05 1 10W DR R836 0R05 1 10W L801 22uH U801 MP3389EF...

Page 69: ...1 2 CN001 CONN 1 2 3 4 6 5 29 24 33 V O L S W 0 2 57 51 60 R005 30K 1 10W 1 R006 12K 1 10W 1 C H C H R007 160KOHM 1 16W S W 0 6 2 53V R009 30K 1 10W 1 1 27V C002 100N 50V V O L S W 0 4 M E N U S O U...

Page 70: ...of TPV MODEL PCB NAME T P V Top Victory Electronics Co Ltd Key Component SUB UY LED201 269 3UYSUBC S530 A3 X6 T3 1 2 3 R207 10K 1 10W 5 IR_OUT R202 100R 1 16W 5 R203 0R05 OHM R204 2K2 1 10W 5 Q202 LM...

Page 71: ...olor Clean the LCD screen Cycle power on off These pixels are permanently on or off and that is a natural defect occurs in LCD technology The image has a faulty coloration It has a yellow blue or pink...

Page 72: ...storted Images from different input sources may appear distorted or stretched on the monitor running at its native resolution To have the optimal display performance of each type of input sources you...

Page 73: ...Check Power On Off is On Re plug the power cable Replace main board and check connections Check the LED indicates is OK Check the AC power Replace the converter board OK NG OK NG NG Turn on the Power...

Page 74: ...r button is OK Check the LVDS FFC cable or panel The end NG OK OK NG Replace the main board Replace the converter board Replace the LVDS FFC cable or panel NG The end Replace the key board NG OK Repla...

Page 75: ...mode Set to the optimal frequency select the recommended frequency Pull out signal cable and check Self Test Feature Check is ok Check the signal cable and the PC Readjust the phase and pixel clock i...

Page 76: ...shift Replace the signal cable Pull out the signal cable and check the screen color display is normal The end Replace the signal cable or PC Reset the factory mode In the user mode set the color setti...

Page 77: ...77 PCB LAYOUT Main Board 715G3988M0D001005K...

Page 78: ...78...

Page 79: ...79...

Page 80: ...80...

Page 81: ...81 Power Board Adapter 715G3973P0BW320030...

Page 82: ...82...

Page 83: ...83...

Page 84: ...84 Converter 715G3977P02000004L...

Page 85: ...85 Key Board 715G4516K01000004S...

Page 86: ...86 IR Board 715G4517R01000004S...

Page 87: ...M1G1740 6120 M4 6 POWER BOARD MAINFRAME 1 6 1kgf cm 0M1G1740 10225 CR3 M4 10 HINGE REAR COVER 4 12 2kgf cm 0Q1G 130 6120 Q3 6 STAND HINGE 1 0Q1G 130 6120 Q3 6 PLATE_BASE BASE 8 0M1G1140 12125 M4 12 ST...

Page 88: ...MI or the computer VGA mode 8 MUTE 9 VOLUME 10 CHANNEL 11 ZOOM Toggles among different picture formats in various display aspect ratios 12 DUAL Toggles among different sound channels 13 SOUND Toggles...

Page 89: ...mming list Displays the current TV programming list for you to choose from 26 INFO Displays resolution information or more information on Teletext 27 FREEZE Turns on off the frozen TV picture screen H...

Page 90: ...U 0AF5 09 7 1DE2 35 EXIT 07F8 10 8 1EE1 36 4CB3 11 9 1FE0 37 4DB2 12 EPG 58A7 38 4EB1 13 0 41BE 39 4FB0 14 PRE CH 44BB 40 TELETEXT 50AF 15 TV 46B9 41 SUBTITLE 55AA 16 YPBPR 47B8 42 SIZE 52AD 17 VIDEO...

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