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DV154/154B LCD Monitor Service Guide

Circuit operation theory

9

(c) Led:

It indicates the DPMS status of this LCD monitor; green light means DPMS on (Normal

operating condition). Amber light means DPMS off (Power off condition).

Inverter Circuit Operation Theory

Block Diagram:

DC Input

ON/OFF

Switch

Oscillateion

Circuit

(Royer)

Inverter

transformer

CCFL

Protection and

Detecte Circuit

PWM drive and

control Buffer

Brightness and

ON/Off signal

2. General Specification

Input Voltage: 12V

Input Current: 1.5A max.

ON/OFF Voltage: 3.3V

PWM Duty: 3.3V/47KHz

Output Requirement:

Max. Output Current: 15mA

Min. Output Current: 8mA

Lamp Working Voltage: 600Vrms

Open Lamp Voltage: 1000Vrms

Frequency: 47KHz

3.Inverter Circuit Operation Theorem

3.1 PWM controller

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Содержание DV154

Страница 1: ...54 DV154B Manual Contents Section 1 Engineering Specifications 2 Circuit Operation Theory 3 Alignment procedure 4 Trouble Shooting 5 DV154 Parts List 6 DV154B Parts List 7 Schematic Diagrams 8 Assembly February 2003 Service Guide ...

Страница 2: ...NAL SPECIFICATION 5 3 1 VIDEO PERFORMANCE 5 3 2 BRIGHTNESS ADJUSTABLE RANGE 5 3 3 ACOUSTICAL NOISE 5 3 4 ENVIRONMENT 5 3 5 AUDIO PERFORMANCE 6 4 LCD CHARACTERISTICS 6 4 1 THE PHYSICAL DEFINITION TECHNOLOGY SUMMARY OF LCD PANEL 6 5 USER CONTROLS 7 5 1 USER S HARDWARE CONTROL DEFINITION 7 5 2 OSD CONTROL FUNCTION DEFINITION 7 6 MECHANICAL CHARACTERISTICS 8 6 1 DIMENSION 8 6 2 WEIGHT 8 6 3 PLASTIC 8 ...

Страница 3: ...er of Display Colors supported 262 144 with dithering Panel driver is 6 bit Contrast Ratio 400 1 typ Luminance 200 cd m2 min At R G B saturated condition Default User color setting AC power input Yes 90 264 Volts 47 63 Hz DC power input with AC power adapter No N A DPMS supported Yes 3 watts LED indicator for power status showed Yes Green Amber Non OSD for control information supported Yes Multi l...

Страница 4: ...A 7 5mA Each connector CCFL Frequency 90 264VAC 40KHz 60KHz Power cord Color White or Black Length 1800 20 mm Depends on shipping requirement 99 level 2 2 Signal interface Item Condition Spec OK N A Remark Signal Cable 15 pin D Sub Color White or Black Length 1770 30 mm Depends on shipping requirement 99 level DVI Pin assignment 15 pin D sub connector See Note 1 For 15 pin D sub Video input Signal...

Страница 5: ... of step function voltage level over the full voltage range Refer to VESA VSIS Standard V1R1 2 4 Scan range Item Condition Spec OK N A Remark Horizontal 31 63KHz Vertical 56 75 Hz Without Frame buffer 2 5 Plug Play DDC2B Support Item Condition Spec OK N A Remark DDC channel type DDC2B EDID Version 1 3 Refer to FP557A MEA DV154 C212 S W spec document to see the detailed EDID data definition 2 6 Sup...

Страница 6: ...d m2 typ 200 cd m2 min Response time Rising Falling time 16 ms typ 23ms max Viewing angle At Contrast ratio 10 R L 60 degrees typ At Contrast ratio 10 U 40 degrees typ D 60 degrees typ CIE coordinate of White 0 31 0 33 0 03 0 03 Display colors 262 144 color with dithering 18 bits with dithering 3 2 Brightness Adjustable Range Item Condition Spec OK N A Remark Brightness adjustable range At Max Con...

Страница 7: ... mm Audio Control 1 Volume range 0 100 levels 2 Mute On Off 4 LCD Characteristics 4 1 The Physical definition Technology summary of LCD panel Item Condition Spec OK N A Remark LCD Supplier AUO Panel type of Supplier M150XN05 Screen Diagonal 381mm 17 0 Display area Unit mm 304 128 H x 228 096 V Physical Size Unit mm 326 W x 249 0 H x 12 05 V Weight Unit gram 1100 typ Technology TN without Film Pixe...

Страница 8: ...n Spec OK N A Remark Contrast See Table 3 Brightness Horizontal Position Vertical Position Pixel Clock Phase Color Temperature C1 9300 C2 6500 C3 5800 User Separate R G B adjustment OSD Position OSD Horizontal position OSD Vertical position Language 6 languages OSD Time From 5 sec to 60 sec Volume Hot key for Contrast Hot key for Brightness Hot key for Volume Auto adjustment Auto Geometry Color In...

Страница 9: ... x W x H mm 440 x 416 x 135 mm Tilt and Swivel range Tilt 0 20 degree 6 2 Weight Item Condition Spec OK N A Remark Monitor Net 3 5 Kg Monitor with packing Gross 4 7 Kg 6 3 Plastic Item Condition Spec OK N A Remark Flammability UL 94 HB Heat deflection To ABS 65 UV stability ABS Delta E 8 MPR2 TCO Resin MPR2 ABS VW55 VE0856 D350 Texture MT11020 Color Pearl White 6 4 Carton Item Condition Spec OK N ...

Страница 10: ... Microsoft Windows PC98 99 DPMS VESA DDC 2B Version 1 3 USB External Safety UL USA UL 1950 3rd edition CSA Canada C22 2 No 950 M95 FIMKO EN60950 IEC950 EN60950 73 23 EEC CB TUV GS EN60950 CCIB China EIAJ JEIDA Japan EMC CE Mark 89 336 EEC FCC USA Class B EN55022 Class B CISPR 22 Class B VCCI Japan Class B BSMI Taiwan C Tick Australia AS3548 X Ray Requirement DHHS 21 CFR USA X Ray Standard DNHW PTB...

Страница 11: ...DV154 154B LCD Monitor Service Guide Engineering Specification Appendix Physical Dimension Front View and Side view FIG 1 PHYSICAL DIMENSION FRONT VIEW AND SIDE VIEW ...

Страница 12: ...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 i key intelligent key which can auto adjusting all controlled items DV154 also offer DDC2 function to meet VESA standard DV154 offers audio function with 2 speakers II Block diagram The DV154 consists of a head an...

Страница 13: ...g IC has internal A D converter internal OSD and auto detect input timing functions A D converter is convert analog signal to digital data OSD is offering adjustable functions to end user Detect timing is for detect change mode Finally the scaling IC outputs the digital R G B data the H sync V sync data enable and pixel clock to TCON Timing controller After TCON processing data data will output to...

Страница 14: ...ck recovery system It also support detect mode and DPMS control 4 MCU We use MTV312 control unit it controls all the functions of this interface board just like the OSD display setting the adjustable items adjusted data storage the external IIC communication support DDC2B 5 EEPROM We use 24C04 to store all the adjustable data except zoom on off control and we divided it into two parts for the stor...

Страница 15: ... 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 Fig 3 2 4 3 1 C605 BD601 TR601 105C 400V 68U 2KBP06ML SCK083 Fig 3 3 Switching element and Isolation power transformer ...

Страница 16: ...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 power See Fig 4 Fig 4 4 Rectifier and filter D702 and C707 are to produce DC output L702 and C708 are to suppress high Frequency switching spikes R704 is a dummy load See Fig 5 ...

Страница 17: ... 4W 22 105C 16V 470U 10U 105C 16V 1000U SB360 SHORT 5A 5V FIX Fig 5 5 PWM Controller The current mode control IC UC3842B is used to control PWM When the VCC terminal of it gets 16V IC601 turns on 5V will be set up at Pin8 through soft start circuit which includes R617 C611 D606 and D605 R616 and C610 generate a fixed frequency saw tooth wave at Pin4 ...

Страница 18: ...100K 47 10K 105C 25V 100U 105C 50V 4 7U 105C 50V 10U D 50V 022U 24V D 50V 220P 100K H945 D 50V 1u D 50V 1000P 1 22K MCR100 6 OPEN 105C 50V 10U 3842B 1N4148 1N4148 1N4148 105C 50V 10U 10K 4 7 VCC Fig 6 6 Feedback circuit PC123 is a photo coupler and TL431 is a shunt regulation They are used to detect the output voltage change and be the primary and secondary isolation When output voltage changes th...

Страница 19: ...eo Class AB output amplifiers with DC Volume control The devices are designed for use in TV and monitor but are also suitable for battery Fed portable recorders and radios Use 12V from AC DC Board and connect speaker to offer 1W per channel B DC Power Input To supply 12V to be VCC source Voltage for TDA7496 and built in AC DC board C Audio Input connect with PC Audio output in 3 5mm to 3 5mm signa...

Страница 20: ...m DC Input ON OFF Switch Oscillateion Circuit Royer Inverter transformer CCFL Protection and Detecte Circuit PWM drive and control Buffer Brightness and ON Off signal 2 General Specification Input Voltage 12V Input Current 1 5A max ON OFF Voltage 3 3V PWM Duty 3 3V 47KHz Output Requirement Max Output Current 15mA Min Output Current 8mA Lamp Working Voltage 600Vrms Open Lamp Voltage 1000Vrms Freque...

Страница 21: ...ators undervoltage lockout circuitry and dual common emitter output transistor circuits The uncommitted output transistors provide common emitter output capability for each controller The internal amplifiers exhibit a common mode voltage range from 1 04V to 1 45V The dead time control comparator has no offset unless externally altered and can provide 0 to 100 dead time The on chip oscillator can b...

Страница 22: ...ve the saturation status and Vce increase The result cause the voltage of primary coil get lower Finally the transistor turn off and another transistor turn on These status are repeated and the pin7 and pin8 of T752 will get a Sin Wave to turn on CCFL 3 3 Feed back Circuit Fig 10 Fig 10 is the feedback circuit of inverter It get the voltage of Lamp Current to be the feedback signal and PWM IC IC75...

Страница 23: ...tory setting area press EXIT ENTER then power on 7 Select timing from figure 1 The timing marked with star sign have to be adjusted 8 Press i key to run AUTO adjustment function 9 Clear user area in EEPROM 10 Check the phase of the image if phase is not perfect adjust it to the best condition 11 Adjust the settings to following values CONTRAST 50 BRIGHTNESS 90 OSD TIME 20 VOLUME 20 COLOR USER 12 P...

Страница 24: ...C3 to meet following spec requirement X 0 283 0 03 Color temperature C1 9300K set on OSD Y 0 297 0 03 X 0 313 0 03 Color temperature C2 6500K set on OSD Y 0 329 0 03 X 0 326 0 03 Color temperature C3 5800K set on OSD Y 0 342 0 03 6 Turns off the monitor power E Writing EDID file 1 Setup a PC with DDC card 2 Connect PC to monitor with a D sub signal cable 3 Please refer to the C212 for the correct ...

Страница 25: ... off CE 2 0 Table 1 Resolution Horizontal Frequency KHz Vertical Frequency Hz Dot Clock Frequency MHz Remark 640x350 31 47 P 70 08 N 25 17 DOS 720x400 31 47 N 70 08 P 28 32 DOS 640x480 31 47 N 60 00 N 25 18 DOS 640X480 37 86 N 72 80 N 31 5 VESA 640X480 37 50 N 75 00 N 31 5 VESA 800x600 35 16 P 56 25 P 36 00 VESA 800x600 37 88 P 60 32 P 40 00 VESA 800x600 48 08 P 72 19 P 50 00 VESA 800X600 46 87 P ...

Страница 26: ...DV154 154B LCD Monitor Service Guide Alignment Procedure 2 Wire Dressing and assembling concern A Lamp wire into holder panel wire B AC socket ground wire fix at standoff ...

Страница 27: ...DV154 154B LCD Monitor Service Guide Alignment Procedure C D sub wire fix at standoff D Control board touch bracket panel ...

Страница 28: ...DV154 154B LCD Monitor Service Guide Alignment Procedure E Add a gasket for TCO99 ...

Страница 29: ...power No Are cables plug in No Plug all wire then turn on power connectors switch again Yes Is power stable No Check Power BD Yes Is LED light green No Check control BD Yes Is LED status normal No Check MCU or replace it Yes Is EEPROM data correct No Clear EEPROM data then turn on power again Yes Is interface BD normally No Replace interface BD Yes Replace panel ...

Страница 30: ...g 2 BUTTON function 2 1 Control Board OSD is unstable or not working Yes Is control BD not connecting Yes Plug control BD then retry No Is bottom switch normally Yes Replace control BD then retry No Replace Control BD Is OSD working No Check Interface BD ...

Страница 31: ...DV154 154B LCD Monitor Service Guide Trouble Shooting 3 OSD function OSD doesn t work Is control BD working No Replace control BD Check interface BD ...

Страница 32: ...ted BLT_ON Insert them again Check CN752 CN753 was pluged properly Plug CN701 again or checking I F BD Replace IC751 3 3V_MCU existed Checking F601 Broke Check IC601 Vcc existed Replace IC601 IC602 IC702 D701 Replace Q701 Q702 or check PW_DOWN signal Replace new fuse Replace IC601 Q602 Q603 R602 Y N N N N Y Y Y Y N Y N Y Y Y N N N Check BLT_ADJ signal existed Plug CN701 again or checking I F BD Y ...

Страница 33: ...A Q743 Q751 22 06 2R060 151 DIODE BRI 2KBP06ML 530 600V 2 BD601 23 06 3R006 110 DIODE S B SB360 60V 3A DO 20 D702 24 06 3R020 121 DIODE FAST EGP30DL 5301 200V3 D703 25 08 22216 354 CAP DISC Y1 2200P 250V RF10 D C615 26 08 2703M 34D CAP DISC 27P3KV J SL 125 RF7 C756 C736 27 08 33216 354 CAP DISC Y1 3300P 250V RF10 D C603 C604 28 09 10813 L9C CAP EL 1000U35V RF5 L 13 25EL C703 29 09 1081D 09C CAP EL...

Страница 34: ...HB 002 64 42 L4612 001 CLIP TA 7 NY66 65 42 L4617 002 HLD PNL WIRE FR ABS 66 46 L4601 021 SHEET BASE INSTALLATION 67 47 L7306 001 GASKET 10L 8W 15H 68 47 L7308 001 L AL TAPE 58 5L 40W 69 50 L6302 001 CABLE FFC P0 5 45P 40MM Z TYP 70 50 L6303 001 CABLE FFC P0 5 30P 40MM Z TYP 71 50 L6304 201 SIGNAL C 20276 1560MM 72 56 91L63 001 LCDM 15 M150XN05 AUO 73 60 L4610 002 ASSY UC 002 WM75 AU CPT 74 60 L55...

Страница 35: ...4 03842 044 IC VR UC3842BN DIP 8P IC601 23 04 07496 010 IC AMP TDA7496 SIP 15P IC501 24 05 00123 010 IC OPTO PC123F1 DIP 4P IC602 25 06 00485 020 FET MOS 2SJ485 PC TP Q701 26 06 05706 010 XTOR 2SC5706 NPN TP 3P Q739 Q740 Q759 Q760 27 06 09024 020 FET MOS IRFU9024 PC TO 251AA Q743 Q751 28 06 2R060 151 DIODE BRI 2KBP06ML 530 600V 2 BD601 29 06 3R006 110 DIODE S B SB360 60V 3A DO 20 D702 30 06 3R020 ...

Страница 36: ...4 001 CVR HINGE ABS HB 002 66 42 L4612 001 CLIP TA 7 NY66 67 42 L4617 002 HLD PNL WIRE FR ABS 68 46 L4601 021 SHEET BASE INSTALLATION 69 47 L7306 001 GASKET 10L 8W 15H 70 47 L7308 001 L AL TAPE 58 5L 40W 71 50 L6302 001 CABLE FFC P0 5 45P 40MM Z TYP 72 50 L6303 001 CABLE FFC P0 5 30P 40MM Z TYP 73 50 L6304 501 SIGNAL C 20276 1560MM 74 56 91L63 001 LCDM 15 M150XN05 AUO 75 60 L4610 012 ASSY UC ABS 8...

Страница 37: ......

Страница 38: ......

Страница 39: ...0 21 22 23 24 25 26 27 28 29 30 CN6 8 1 7 2 6 3 5 4 RN7 47 1 2 3 4 8 7 6 5 TP37 TP71 TP43 TP51 TP60 CN4 8 1 7 2 6 3 5 4 RN9 47 1 2 3 4 8 7 6 5 TP38 TP70 CN8 8 1 7 2 6 3 5 4 TP44 TP61 TP52 J5 20L2043045 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 C81 300 TP39 TP54 TP69 TP73 TP45 TP34 RN5 47 1 2 3 4 8 7 6 5 TP66 TP62 T...

Страница 40: ... 330 Q6 2N3904 1 3 2 C54 100P 50V J TP24 J3 2060201207 1 3 5 7 9 11 13 2 4 6 8 10 12 14 C122 100P 50V J TP30 R110 47 R111 0 C71 0 1U 25V K R52 BEAD C55 100P 50V J R92 10K C59 100P 50V J TP21 Q4 2N3904 1 3 2 R51 1K C120 100P 50V J TP31 R47 330 TP23 R56 BEAD C52 0 1U 25V K L4 BEAD C56 100P 50V J R11 4 7K R54 BEAD TP33 Q3 2N3904 1 3 2 R13 2K TP22 C121 100P 50V J C64 10U 16V TP26 R12 1K TP18 TP20 C53 ...

Страница 41: ...P1 1 18 P3 2 INT0 19 P1 2 20 P1 3 21 P1 4 22 P1 5 23 P1 6 24 P1 7 25 P6 1 AD1 26 P6 0 AD0 27 HSDA P3 1 Txd 28 HSCL P3 0 Rxd 29 P6 4 DA10 30 P6 5 DA11 31 P6 6 DA12 32 DA6 P5 6 34 DA7 HCLAMP 35 VBLANK P4 0 36 HBLANK P4 1 37 DA9 HALFV 38 DA8 HLFHO 39 DA5 P5 5 40 DA4 P5 4 41 DA3 P5 3 42 HSYNC 43 VSYNC 44 P6 7 DA13 33 VDD 8 P6 3 AD3 9 TP15 Y1 12MHZ TP17 R41 4 7K R35 2K R95 2K C42 100P 50V J C47 15P 50V...

Страница 42: ...5 DVCC 36 DGND 37 VGA_VSYNC 38 VGA_HSYNC 39 SOGI 40 AVCC 41 AGND 42 VREF 43 CP 44 CZ 45 VCCAB 46 BI 47 GNDAB 48 BCLP 49 VTOP 50 VBOT 51 VCCAG 52 GI 53 GNDAG 54 GCLP 55 TOUTP 56 TOUTM 57 VCCAR 58 RI 59 GNDAR 60 RCLP 61 PLLVDD 62 PLLVSS 63 DCVSS 64 OSD_FSW 65 OSD_CLK 66 OSD_R 67 OSD_G 68 OSD_B 69 OSD_I 70 DCVDD 71 RESERVED 72 XTAL 73 XTALI 74 DIBVSS 75 DISP_DE 76 DISP_VSYNC 77 SHCLK 78 DISP_HSYNC 79...

Страница 43: ... CON16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 D9 OPEN D5 OPEN TP6 R2 10K C72 22P 50V J C1 47P 50V J U1C 74LVC14 5 6 14 7 R10 330 R3 24 R58 100 R46 0 TP3 C4 0 01U 50V K D8 OPEN TP7 C2 47P 50V J TP5 R4 24 U1E 74LVC14 11 10 14 7 U1D 74LVC14 9 8 14 7 DN4 BAV99 1 3 2 DN1 BAV99 1 3 2 C5 0 01U 50V K DN3 BAV99 1 3 2 TP4 R6 75 TP2 DN2 BAV99 1 3 2 R8 75 R9 330 D1 TZMC5V1 C75 0 1U 25V K U1A 74LVC14 1 2 14 7 ...

Страница 44: ...Holes OP1 OP18 OP OP5 H1 HOLE V8 1 2 3 4 5 6 7 8 9 OP OP4 OP OP9 OP OP11 OP OP15 OP OP10 OP OP14 H2 HOLE V8 1 2 3 4 5 6 7 8 9 OP OP12 OP OP16 H3 HOLE V8 1 2 3 4 5 6 7 8 9 OP OP7 OP OP13 OP OP6 OP OP1 OP OP3 OP OP8 OP OP2 OP1 OP17 H4 HOLE V8 1 2 3 4 5 6 7 8 9 ...

Страница 45: ...2 23 4L630 001 SPK 2 2W 8 OHM 410MM FP557A 2 10 60 L4610 002 ASSY UC 002 FP557 WM75 AU CPT 1 11 60 L5507 004 ASSY COLUMN EY 002 FP557 1 12 60 L4619 003 ASSY BASE PLATE 002 FP557 1 13 42 L4604 XXX CVR HINGE ABS HB 517 FP557 1 14 42 L7305 001 HOLDER PANEL CMO CPT ABS FP557 1 2 HINGE COVER HIGNE TO U C 15 86 00075 120 SCRW MACH PAN M4 0 7 12L C ZN 2 HINGE TO COLUMN 4 BKT PNLTO BEZEL 3 U CTO BEZEL 16 ...

Страница 46: ......

Страница 47: ...K 2 2W 8 OHM 410MM FP557A 2 10 60 L4610 012 ASSY UC ABS 861 FP557 WM75 1 11 60 L5507 014 ASSY COLUMN EY 861 FP557 BENQ 1 12 60 L4619 013 ASSY BASE EASY 861 FP557G 1 13 42 L4604 012 CVR HINGE RIB ABS 861 FP557G 1 14 42 L7305 001 HOLDER PANEL CMO CPT ABS FP557 1 2 HINGE COVER HIGNE TO U C 15 86 00075 120 SCRW MACH PAN M4 0 7 12L C ZN 2 HINGE TO COLUMN 4 BKT PNLTO BEZEL 3 U CTO BEZEL 16 86 WA314 8R0 ...

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