- 1 - Product Service Manual – Level II Service Manual for BenQ: G2420HD P/N: 9H.L3ALB.QBx Applicable for All Regions Version: 001 Date:2009/0
- 10 - 3.1.2.6 Support Timings
- 11 - HDMI video support timing 3.1.3 Operational & Functional Specification 3.1.3.1 Video performance *All spec. of monitor nee
- 12 - 3.1.3.2 Brightness Adjustable Range Item Condition Spec OK NA Remark Brightness adjustable range At default contrast level (saturate poi
- 13 - (3) Procedure: Confirmed sample with appearance and function ready before testing then compare with after test
- 14 - 3.1.3.9 Audio performance (Ear-Jack, For HDMI audio only) Item Condition Spec OK NA Remark Preamp + Power amp (1)Output power 1 Wrms/CH
- 15 - Blue y 0.04 0.07 0.10 Color Coordinates (CIE) White White x 0.283 0.313 0.343 White y 0.299 0.329 0.359 Luminance Uniformity [%]
- 16 - Sharpness Display Information For input timing Volume For HDMI Audio only Mute For HDMI Audio only Hot key for Brightness
- 17 - 3.1.7 Pallet & Shipment 3.1.7.1 Container Specification Stowing Type Container Quantity of products (sets) (Every container) Quantity of
- 18 - FIMKO EN60950 CE Mark 73/23/EEC CB IEC60950 CB EN60950 TUV/GS EN60950 / EK1-ITB 2000:2003 CCC (China) CB4943 GOST
- 19 - 3.2. Customer Acceptance 3.2.1. SCOPE This document establishes the general workmanship standards and functional Acceptance cri
- 2 - Content Index Abbreviations & Acronyms ... 3 1 About This Man
- 20 - 3.2.6. CLASSIFICATION OF DEFECTIVES A defective is a product which contains one or more defects. The defective will be classified into foll
- 21 - 3.2.10. TEST CONDITIONS Unless otherwise prescribed, the test conditions are as follows: . Nominal mains voltage Temperature: +5~+35℃
- 22 - No Description Class3.4 Poor print of logo or name plate Major3.5 Label on product Wrong or missing Major3.6 Scratched or dirty but leg
- 23 - 3.2.13. OPERATIONAL INSPECTION CRITERIA 1. TEST PATTERN 2. SPECIFICATIONS 3. OPERATIONAL INSPECTION CRITERIA 3.2.13.1. List of test
- 24 - 3.2.13.2. Video performance Item Spec OK N.A Remark Max. support Pixel rate 170 MHz Both for analog and digital inputs Max. Resolution
- 25 - 4 Level 1 Cosmetic / Appearance / Alignment Service 4.1. Software / Firmware Upgrade Process 4.1.1 Hardware Requirement: 1. I2C board x 1 (a.P
- 26 - 4.1.2 Software prepare 1. Realtek.exe Step 1: Press RTD Tool Step 2: Choose “ IIC”, “Serial Flash” and “0x94”. Then, p
- 27 - Step 3: Click the “Bank” and Find the F/W 1. xxx.H00 2. xxx.H01 3. xxx.H02 4. xxxEXT.Hex Step4: Choose “P-Flash” and “Auto” Step5: Press to
- 28 - 4.1.3 EDID Upgrade Procedure Step 1: Run the program “Q-EDID-V016.exe”, when the UI popped up Note: If “VGA” choose 1
- 29 - Step 2: Click “Open File” and select “VGA” or “HDMI” EDID file Step 3: If load file is successful, it shows “Open EDID Table OK.”
- 3 - Abbreviations & Acronyms 1 About This Manual This manual contains information about maintenance and service of BenQ products. Use this ma
- 30 - Step 4: If write EDID is successful, it shows ”Write EDID OK …” And then, click “Read EDID” button to check if successful or not.
- 31 - 4.2. Alignment procedure (for function adjustment) A. Preparation: 1. Setup input timing ICL-605( 1280x1024@75Hz ), Pattern:5-Mosaic. 2. Set
- 32 - D. Color adjustment: 1. Setup input timing ICL-605, white pattern. 2. Confirm auto color adjustment had already done. 3. Measure color temp
- 33 - F. Command definition : PC Host will send 0x7C IIC slave address and then following 4 bytes command I2C Send Command Byte1Byte2 Byte3 Byte4
- 34 - Write Cx R-Gain Data to EEPROM AA 7C Datacksum Reserved for some model have extra color temperature Write Cx G-Gain Data to EEPROM AA 7D
- 35 - Read C2 (sRGB) B-Gain data from EEPROM A3 4E XXcksum Read C3 (Reddish) R-Gain data from EEPROM A3 5C XXcksum Read C3 (Reddish) G-G
- 36 - Read OSD Rotation from EEPROM A3 9F XXcksum Change Color Temp. to C1/9300K/Bluish CC 01 XXcksum Change C/T immediately. And store C/T
- 37 - Increase ADC B-Gain AC 35 Datacksum Decrease ADC R-Offset2 AD 23 Datacksum Decrease ADC G-Offset2 AD 24 Datacksum Decrease A
- 38 - Change Power Status D0 Data XXcksum PowerOFF: Data=AA PowerON: Data=Other Value Change Language Type D1 Data XXckssum Asia: Data=AA E
- 39 - 12531391415161721 2223192012185 4 10 11 678 5 Level 2 Disassembly /Assembly Circuit Board and Standard Parts Replacement 5.1. Exploded View
- 4 - 2 Introduction This section contains general service information, please read through carefully. It should be stored for easy access place for
- 40 - * This Service BOM is subject to change. Please check it on eSupport and SPO system before serv
- 41 - 5.2. Disassembly /Assembly 5.2.1 Disassembly SOP Preparation before disassemble 1. Clean the room for disassemble 2. Identify the area
- 42 - 3 Turn over the monitor ,dismantle the Rear cover from the monitor(if it have earphone function, pull the earphone wire out of the connector)
- 43 - 6 Tear off the two acetic tapes (if it have that ) Pull out the light wires from connector . 7 Disassemble the SHD 8 Tear off all
- 44 - 9 Tear off the yellow tape on the LVDS FFC ,and pull LVDS FFC out off the panel . 10 Disassemble the hexangular screws ( four or two ) 1
- 45 - 5.2.2 Assembly SOP Preparation before assemble 1. Clean the room for work 2. Identify the area for material 3. Prepare the implement, equipmen
- 46 - 4 Lock PCBA screw .--five or six PCBA screw ,one earth screw . Screw driver : 7±1kg 5 Turn over the bkt, and lock the hexangular screws (
- 47 - 8 Fetch yellow tape, and stick it on the LVDS FFC 9 Use location tool ,location the bkt on panel location tool: G24101 10 Stick t
- 48 - 12 Stick big aluminum foil on the side (like left PIC) 13 Fetch bezel ,and put panel into bezel (don’t touch the LCD screen. 14 P
- 49 - 16 Assay stand .(follow picture on left .) put hinge in front cover ,and lock four screws, then cover the back cover ,last put the clip in fr
- 5 - 3 Product Overview 3.1. Specification 3.1.1 Introduction G2420HD is defined 24’W LCD Monitor supports WXGA (1920x1080) resolution with DPMS
- 50 - 5.3. Main-Shielding Position AL-Tape AL-Tape L Shape Tooling 機種名稱 測點A尺寸 測點B尺寸 測點C尺寸BenQ G900HD 56
- 51 - 5.4. Packing
- 52 - 5.5. Block diagram The G2420HD is a 24” (1920x1080) Model, LCD type is TN+ Film and Normally White, 16.7M colors(R, G, B 6-bit data+ FRC data
- 53 - 5.6. Trouble Shooting Guide 5.6.1 No Display or display is unstable on analog, digital or video port:
- 54 - 5.6.2 BUTTON Function: 5.6.3 OSD Function: OSD is not working Is control BD connecting
- 55 - 5.6.4 Power no work troubleshooting 5.6.4.1 DC/DC converter +5V(+5.4V) valid? YesCheck wire and I/F BDNoCheck L852, Q852, FD852, FD853, Q855
- 56 - 5.6.4.2 AC/DC converter
- 57 - 5.6.4.3 Inverter Panel lamp no workCheck V-INVERTER OK?AC/DC converterNoYesCheck IC801 VDDAOK?DC/DC converterNoCheck BL_ON, BRT_ADJOK?YesChe
- 58 - 5.7. Circuit Operation Theory A-1.) Interface board diagram: A-2.) Circuit operation theory: (a) Monitor Diagram:
- 59 - (b) Circuit operation theory A basic operation theory for this interface board is to convert analog signals of Red, Green and Blue to digital
- 6 - Auto adjustment function supported Yes “I-Key” function DDC function supported (EDID ver. 1.3) Yes DDC2B DDC-CI support version 1.1 or la
- 60 - (5) “Auto” key: to perform auto adjustment (6) LED: It indicates the DPMS status of this LCD monitor; blue light means DPMS on (Normal operat
- 61 - #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).
- 62 - #4 Rectifier and filter D701, D702, C701, C702, C703 are used to produce DC output. (See Fig.5) V-INVERTER2T601131258116410D701YG862C15RSCA1J
- 63 - #5 PWM Controller The TEA1530(A)T can be used in Fixed Frequency converter designs for low voltage, high current applications. At low power (
- 64 - #6 Feedback circuit PC123 is a photo-coupler and KA431 is a shunt regulation. They are used to detect the output voltage change and be the pri
- 65 - IC851(TL1451) is a 2-way PWM control IC. C851/R851 determine the frequency of PWM. Pin 1IN+/1IN- and 2IN+/2IN- are the inputs of the error am
- 66 - P-MOSFET Q852 is used for switching of step-down converter. And FD852/FD853 are the flywheel diodes. R874/R875 determine the feedback to IC851
- 67 - Full-Bridge Configuration N_DP_CP_AN_BC8274.7U MC8294.7U MZD801TZMC6V2A KR81110KR81210K...T80163548271FD801ERB83-004AKQ80141235876Q802412358
- 68 - Feed-back Circuit F3F1 TP801TP803TP804TP802OZ9933IC801VSEN1SST/CMP2CT3RT14GNDA5PDR26GNDP7NDR28NDR19PDR110VDDA11TIMER12PWM13ISEN14OVPT15ENA16D
- 69 - Appendix 1 – Screw List / Torque STANDARD SCREW TORQUE SPEC. ITEM P/N DESCRIPTION MOUNTING MATERIAL TORQUE (KG-CM) HOLE SIZE (MM) ScrewHead1
- 7 - 3.1.2.2 Signal interface Item Condition Spec OK N.A Remark Signal Cable 15-pin D-Sub Color: Black Length: 1500 +/- 30 mm 24-pin DVI-D Co
- 70 - 10 8F.VG234.6R0 SCRW TAP PH W/F M3*6 TP-S ZN Aluminum (Heatsink) None tread: 8~10 Have tread: 6~8 Aluminum: 4~5 Φ2.68±0.03 #2 11 8F.VZ526.
- 71 - 22 8F.00608.6R0 SCRW TAP PH F/10WSH M3*6L B-ZN PLASTIC 4.5±0.5 Φ2.35±0.05 #2 23 8F.XA313.8R0 SCRW TAP FLAT/PT M2.5*8L B-ZN Plastic Metal to pl
- 72 - Appendix 2-Physical Dimension Front View and Side view Fig. 1 Physical Dimension Front View and Side view
- 73 - Fig. 2 Appearance Description
- 8 - Note-2: The pin assignment of 24-pin DVI-D connector is as below, PSignal Assignment Pin Signal Assignment 1 TMDS RX2- 13 Floating 2 TMD
- 9 - 3.1.2.3 Video performance Item Condition Spec OK N.A Remark Max. support Pixel rate 170 MHz Both for analog and digital inputs Max. Re
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