BenQ G2420HD Wartungshandbuch

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Product Service Manual – Level II
Service Manual for BenQ:
G2420HD
P/N:
9H.L3ALB.QBx
Applicable for All Regions
Version: 001
Date:2009/05/26
Notice:
- For RO to input specific “Legal Requirement” in specific NS regarding to responsibilit
y
and liabilit
y
statements.
- Please check BenQ’s eSupport web site, http://esupport.benq.com, to ensure that you have the most
recent version of this manual.
First Edition (May, 2009)
© Copyright BenQ Corporation 2009. All Right Reserved.
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1 2 3 4 5 6 ... 72 73

Inhaltsverzeichnis

Seite 1

- 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

Seite 2

- 10 - 3.1.2.6 Support Timings

Seite 3 - 1 About This Manual

- 11 - HDMI video support timing 3.1.3 Operational & Functional Specification 3.1.3.1 Video performance *All spec. of monitor nee

Seite 4 - 2 Introduction

- 12 - 3.1.3.2 Brightness Adjustable Range Item Condition Spec OK NA Remark Brightness adjustable range At default contrast level (saturate poi

Seite 5 - 3 Product Overview

- 13 - (3) Procedure: Confirmed sample with appearance and function ready before testing then compare with after test

Seite 6 - - 6

- 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

Seite 7 - - 7

- 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 [%]

Seite 8 - - 8

- 16 - Sharpness  Display Information For input timing  Volume For HDMI Audio only  Mute For HDMI Audio only  Hot key for Brightness

Seite 9

- 17 - 3.1.7 Pallet & Shipment 3.1.7.1 Container Specification Stowing Type Container Quantity of products (sets) (Every container) Quantity of

Seite 10 - - 10

- 18 - FIMKO EN60950  CE Mark 73/23/EEC  CB IEC60950  CB EN60950  TUV/GS EN60950 / EK1-ITB 2000:2003  CCC (China) CB4943  GOST

Seite 11 - - 11

- 19 - 3.2. Customer Acceptance 3.2.1. SCOPE This document establishes the general workmanship standards and functional Acceptance cri

Seite 12 - - 12

- 2 - Content Index Abbreviations & Acronyms ... 3 1 About This Man

Seite 13 - - 13

- 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

Seite 14 - - 14

- 21 - 3.2.10. TEST CONDITIONS Unless otherwise prescribed, the test conditions are as follows: . Nominal mains voltage Temperature: +5~+35℃

Seite 15 - - 15

- 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

Seite 16 - - 16

- 23 - 3.2.13. OPERATIONAL INSPECTION CRITERIA 1. TEST PATTERN 2. SPECIFICATIONS 3. OPERATIONAL INSPECTION CRITERIA 3.2.13.1. List of test

Seite 17 - - 17

- 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

Seite 18 - - 18

- 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

Seite 19 - 3.2. Customer Acceptance

- 26 - 4.1.2 Software prepare 1. Realtek.exe Step 1: Press RTD Tool Step 2: Choose “ IIC”, “Serial Flash” and “0x94”. Then, p

Seite 20 - - 20

- 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

Seite 21 - - 21

- 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

Seite 22 - - 22

- 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.”

Seite 23

- 3 - Abbreviations & Acronyms 1 About This Manual This manual contains information about maintenance and service of BenQ products. Use this ma

Seite 24

- 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.

Seite 25 - Print Cord I2C Board

- 31 - 4.2. Alignment procedure (for function adjustment) A. Preparation: 1. Setup input timing ICL-605( 1280x1024@75Hz ), Pattern:5-Mosaic. 2. Set

Seite 26 - - 26

- 32 - D. Color adjustment: 1. Setup input timing ICL-605, white pattern. 2. Confirm auto color adjustment had already done. 3. Measure color temp

Seite 27 - - 27

- 33 - F. Command definition : PC Host will send 0x7C IIC slave address and then following 4 bytes command I2C Send Command Byte1Byte2 Byte3 Byte4

Seite 28 - - 28

- 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

Seite 29 - - 29

- 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

Seite 30 - - 30

- 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

Seite 31 - - 31

- 37 - Increase ADC B-Gain AC 35 Datacksum  Decrease ADC R-Offset2 AD 23 Datacksum  Decrease ADC G-Offset2 AD 24 Datacksum  Decrease A

Seite 32 - - 32

- 38 - Change Power Status D0 Data XXcksum  PowerOFF: Data=AA PowerON: Data=Other Value Change Language Type D1 Data XXckssum  Asia: Data=AA E

Seite 33 - - 33

- 39 - 12531391415161721 2223192012185 4 10 11 678 5 Level 2 Disassembly /Assembly Circuit Board and Standard Parts Replacement 5.1. Exploded View

Seite 34 - - 34

- 4 - 2 Introduction This section contains general service information, please read through carefully. It should be stored for easy access place for

Seite 35 - - 35

- 40 - * This Service BOM is subject to change. Please check it on eSupport and SPO system before serv

Seite 36 - - 36

- 41 - 5.2. Disassembly /Assembly 5.2.1 Disassembly SOP Preparation before disassemble 1. Clean the room for disassemble 2. Identify the area

Seite 37 - - 37

- 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)

Seite 38 - - 38

- 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

Seite 39 - 5.1. Exploded View

- 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

Seite 40 - - 40

- 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

Seite 41 - - 41

- 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 (

Seite 42 - - 42

- 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

Seite 43 - - 43

- 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

Seite 44 - - 44

- 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

Seite 45 - - 45

- 5 - 3 Product Overview 3.1. Specification 3.1.1 Introduction G2420HD is defined 24’W LCD Monitor supports WXGA (1920x1080) resolution with DPMS

Seite 46 - - 46

- 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

Seite 47 - - 47

- 51 - 5.4. Packing

Seite 48 - - 48

- 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

Seite 49 - - 49

- 53 - 5.6. Trouble Shooting Guide 5.6.1 No Display or display is unstable on analog, digital or video port:

Seite 50 - 5.3. Main-Shielding Position

- 54 - 5.6.2 BUTTON Function: 5.6.3 OSD Function: OSD is not working Is control BD connecting

Seite 51 - 5.4. Packing

- 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

Seite 52 - 5.5. Block diagram

- 56 - 5.6.4.2 AC/DC converter

Seite 53 - 5.6. Trouble Shooting Guide

- 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

Seite 54 - - 54

- 58 - 5.7. Circuit Operation Theory A-1.) Interface board diagram: A-2.) Circuit operation theory: (a) Monitor Diagram:

Seite 55 - 5.6.4.1 DC/DC converter

- 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

Seite 56 - 5.6.4.2 AC/DC converter

- 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

Seite 57 - 5.6.4.3 Inverter

- 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

Seite 58 - - 58

- 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).

Seite 59 - - 59

- 62 - #4 Rectifier and filter D701, D702, C701, C702, C703 are used to produce DC output. (See Fig.5) V-INVERTER2T601131258116410D701YG862C15RSCA1J

Seite 60

- 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 (

Seite 61 - - 61

- 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

Seite 62 - #4 Rectifier and filter

- 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

Seite 63 - - 63

- 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

Seite 64 - - 64

- 67 - Full-Bridge Configuration N_DP_CP_AN_BC8274.7U MC8294.7U MZD801TZMC6V2A KR81110KR81210K...T80163548271FD801ERB83-004AKQ80141235876Q802412358

Seite 65 - - 65

- 68 - Feed-back Circuit F3F1 TP801TP803TP804TP802OZ9933IC801VSEN1SST/CMP2CT3RT14GNDA5PDR26GNDP7NDR28NDR19PDR110VDDA11TIMER12PWM13ISEN14OVPT15ENA16D

Seite 66 - - 66

- 69 - Appendix 1 – Screw List / Torque STANDARD SCREW TORQUE SPEC. ITEM P/N DESCRIPTION MOUNTING MATERIAL TORQUE (KG-CM) HOLE SIZE (MM) ScrewHead1

Seite 67 - - 67

- 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

Seite 68 - - 68

- 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.

Seite 69 - - 69

- 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

Seite 70 - - 70

- 72 - Appendix 2-Physical Dimension Front View and Side view Fig. 1 Physical Dimension Front View and Side view

Seite 71

- 73 - Fig. 2 Appearance Description

Seite 72 - - 72

- 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

Seite 73

- 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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