Service manual

ManualsBrandsAOC ManualsComputer equipmente2450Swh

Horizontal Frequency

30 - 83kHz

Table of Contents

Description Page Description Page

SAFETY NOTICE

ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE

CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING

ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.

Service

Table of Contents…………………..…………………..…...1

Revision List.…...................................................……......2

Important Safety Notice.….….............................……......3

1.Monitor Specification..............................………............4

2.LCD Monitor Description……….…………………….......5

3.Operation Instruction.…………...................……...........6

3.1.General Instructions....................................…...........6

3.2.Control Buttons and Connections...............................6

3.3.OSD Setting….........................................................8

4.Input/Output Specification...............…………….......18

4.1.Input Signal Connector...............………..................18

4.2.Preset Display Modes……..........................19

4.3.Panel Specification…………..………………………..20

5.Block Diagram….........................................................22

5.1.Main Board…..…............................................22

5.2.Power Board…………..…………………………......23

6.Schematic…………..….........................................24

6.1.Main Board..…….…...........................................24

6.2.Power Board..……….........................................29

7.PCB Layout..………..............................................31

7.1.Main Board………..…........................................31

7.2.Power Board….…..............................................33

7.3.Key Board………..…..........................................36

8.Maintainability………............................................37

8.1.Equipments and Tools Requirement…...............37

8.2.Trouble Shooting…..………...............................38

9.White-Balance,Luminance Adjustment…............42

10.Monitor Exploded View……................................44

11.BOM List…………..……………………….............45

CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

R FOR TH

UNIT WHEN S

23.6" Flat Wide LCD Monitor AOC e2450Swh

Summary of content (57 pages)

PAGE 1
23.6" Flat Wide LCD Monitor AOC e2450Swh Service Service Service Horizontal Frequency 30 - 83kHz Table of Contents Description Page Description Page Table of Contents…………………..…………………..…...1 6.Schematic…………..….........................................24 Revision List.…...................................................……......2 6.1.Main Board..…….…...........................................24 Important Safety Notice.….….............................……......3 1.Monitor Specification.................
PAGE 2
Revision List Version Release Date Revision History TPV Model Name A00 Jun.-29-2011 Initial release HDBMNZNEAHA1DNE HDB2NZ2EAHA1DNE HDB2NZ2EAHA2DNE HDB2NZ2FAHA1DNE HDB2NZ2JAHA1DNE HDB2NZ6BDFA1DNE HDBMNZ2FAHA1DNE A01 Feb.
PAGE 3
Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended.
PAGE 4
1.
PAGE 5
2.LCD Monitor Description The LCD monitor will contain a main board, an adapter board, a converter board and a key board which house the flat panel control logic, brightness control logic and DDC. The power part will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage. Monitor Block Diagram LED Drive.
PAGE 6
3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The other control knobs are located at front panel of the monitor (See Figure ). By changing these settings, the picture can be adjusted to your personal preferences. * The power cord should be connected. * Press the power button to turn on the monitor. The power indicator will light up. 3.
PAGE 7
1. AC port 2. VGA 3. DVI (available for selected models) 4. HDMI(available for selected models) 5. Audio(available for selected models) To protect equipment, always turn off the PC and LCD monitor before connecting. 1. Connect the power cable to the AC port on the back of the monitor. 2. Connect one end of the 15-pin D-Sub cable to the back of the monitor and connect the other end to the computer's D-Sub port. 3.
PAGE 8
3.3 OSD Setting Basic and simple instruction on the control keys. 1)Press the MENU-button to activate the OSD window. 2) Press - or + to navigate through the functions. Once the desired function is highlighted, press the MENU-button to activate it . press - or + to navigate through the sub-menu functions. Once the desired function is highlighted, press MENU-button to activate it. 3) Press - or + to change the settings of the selected function. Press AUTO to exit.
PAGE 9
Luminance 1 Press (Menu) to display menu. 2 Press - or + to select (Luminance), and press 3 Press - or + to select submenu, and press to enter. to enter. 4 Press - or + to adjust. 5 Press to exit.
PAGE 10
Image Setup 1 Press (Menu) to display menu. 2 Press - or + to select (Image Setup), and press 3 Press - or + to select submenu, and press to enter. 4 Press - or + to adjust. 5 Press to exit. 10 to enter.
PAGE 11
Color Setup 1 Press (Menu) to display menu. 2 Press - or + to select (Color Setup), and press 3 Press - or + to select submenu, and press to enter. to enter. 4 Press - or + to adjust. 5 Press to exit.
PAGE 12
Picture Boost 1 Press (Menu) to display menu. 2 Press - or + to select (Picture Boost), and press 3 Press - or + to select submenu, and press to enter. 4 Press - or + to adjust. 5 Press to exit. 12 to enter.
PAGE 13
OSD Setup 1 Press (Menu) to display menu. 2 Press - or + to select (OSD Setup), and press 3 Press - or + to select submenu, and press to enter. to enter. 4 Press - or + to adjust. 5 Press to exit.
PAGE 14
Extra 1 Press (Menu) to display menu. 2 Press - or + to select (Extra), and press 3 Press - or + to select submenu, and press to enter. to enter. 4 Press - or + to adjust. 5 Press to exit.
PAGE 15
Exit 1 Press (Menu) to display menu. 2 Press - or + to select (Exit), and press 3 Press - or + to select submenu, and press to enter. to enter. 4 Press - or + to adjust. 5 Press to exit.
PAGE 16
LED Indicators Status LED Color Full Power Mode Green or Blue Active-off Mode Orange or red e-Saver Welcome to use AOC e-Saver monitor power management software! The AOC e-Saver features Smart Shutdown functions for your monitors, allows your monitor to timely shutdown when PC unit is at any status (On, Off, Sleep or Screen Saver); the actual shutdown time depends on your preferences (see example below). Please click on "driver/e-Saver/setup.
PAGE 17
Screen+ Welcome to "Screen+" software by AOC, Screen+ software is a desktop screen splitting tool, it splits the desktop into different panes, each pane displays a different window. You only need to drag the window to a corresponding pane, when you want to access it. It supports multiple monitor display to make your task easier. Please follow the installation software to install it.
PAGE 18
4. Input/Output Specification 4.
PAGE 19
4.
PAGE 20
4.3 Panel Specification 4.3.1 General Features M236H3-LA3 is a 23.6” TFT Liquid Crystal Display module with WLED Backlight unit and 30 pins 2ch-LVDS interface. This module supports 1920 x 1080 Full HD mode and can display up to 16.7M colors. The converter module for Backlight is not built in. 4.3.2 General Specifications 4.3.
PAGE 21
LED array electrical characteristics Note (1) LED light bar input voltage and current are measured by utilizing a true RMS multimeter as shown below: (2) PBL = IPIN × VPIN × ( 8 ) input pins , LED light bar circuit is ( 9 )Series, ( 8 )Parallel. (3) The lifetime of LED is defined as the time when LED packages continue to operate under the conditions at Ta = 25 ±2 ℃ and I= (25)mA (per chip) until the brightness becomes ≦ 50% of its original value. 4.3.
PAGE 22
5. Block Diagram 5.1 Main Board 04.SCALER 02.INPUT RIN GNDR GIN GNDG BIN GNDB HSY NC VSY NC DDCA_SDA DDCA_SCL DVI5V RIN GNDR GIN GNDG BIN GNDB HSY NC VSY NC DDCA_SDA DDCA_SCL 05.
PAGE 23
5.2 Power Board AC input EMI filter Bridge Rectifier and Filter Transformer (T901) Rectifier diodes 14.
PAGE 24
6. Schematic 6.
PAGE 25
CN501 HDMI 20 21 22 23 24 TH1 TH2 TH3 TH4 TH5 HDMI1/D2+ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 D2+ D2 Shield D2D1+ D1 Shield D1D0+ D0 Shield D0CK+ CK Shield CKCE Remote NC DDC CLK DDC DATA GND +5V HP DET HDMI1_D2+ HDMI1/D2HDMI1/D1+ HDMI1_D2HDMI1_D1+ HDMI1/D1HDMI1/D0+ HDMI1_D1HDMI1_D0+ HDMI1/D0HDMI1/CK+ HDMI1_D0HDMI1_CK+ DET_HDMI HDMI1/CKR753 CEC NC CEC3* HDMI1_CKCEC_CTRL HDMI_SCL HDMI_SDA HDMI1_+5V R153 1K 1/16W 5% ZD104 NC/RLZ5.
PAGE 26
+5V_SB ADC_VDD DVI_VCC MVDD DVDD CVDD ADC_1V8 C409 C410 100N16V 100N16V 128 16 2 +5V_SB AUDIO_VDD VCC3.3 FB401 DVI_VCC 120 OHM VCC3.3 1 MPLL_VDD FB402 DVDD 120 OHM 1 VCC3.
PAGE 27
PA[0..9] PB[0..9] PB[0..
PAGE 28
+5V_SB VCC3.3 U701 +5V_SB VCC3.3 3 VIN R701 10K 1/16W 5% 220uF/16V C705 100N16V CN701 R702 9 8 7 6 5 4 3 2 1 1K 1/16W 5% PWMB* + C703 100uF/16V 1 C701 100N16V VCC3.3 GND C702 2 VOUT +5V_SB + C704 100N16V Adj_BACKLIGHT VCC3.3 U702 DIM VCC3.3 NC/AP2114D-3.3TRG1 R704 47K 1/16W 5% 3 PC5 on_BACKLIGHT R752 22K 1/16W 5% R708 47K 1/16W 5% R710 U703 R750 1K 1/16W 5% Volume Volume C709 NC 3.
PAGE 29
6.2 Power Board Adapter 715G4744P01003001M ! 1 R929 100 OHM 1/4W C916 R930 100 OHM 1/4W 2N2 500V C928 2N2 500V F801 0R05 1/4W +14.
PAGE 30
Converter 715G3918P03000004C R844 NC C811 NC F801 FUSE L801 22uH + R833 R832 R831 R830 + 1 1 1 1 OHM 1/10W OHM 1/10W OHM 1/10W OHM 1/10W CN803 NC C801 1 2 3 4 ENA S1 G1 S2 G2 D1 D1 D2 D2 8 7 6 5 C803 220P 100V C804 33UF 100V R829 1 OHM 1/10W Q801 P8008HV R845 100 OHM 1/10W R801 0.3 OHM 10 9 8 7 6 5 4 3 2 1 C810 NC C814 100P 50V R804 24K +-1% 1/10W R802 0.3 OHM OVP1 R842 N.
PAGE 31
7. PCB Layout 7.
PAGE 32
PAGE 33
7.
PAGE 34
Converter 715G3918P03000004C 34
PAGE 35
PAGE 36
7.
PAGE 37
8. Maintainability 8.1 Equipments and Tools Requirement 1. Voltmeter. 2. Oscilloscope. 3. Pattern Generator. 4. DDC Tool with an IBM Compatible Computer. 5. Alignment Tool. 6. LCD Color Analyzer. 7. Service Manual. 8. User Manual.
PAGE 38
8.
PAGE 39
2.
PAGE 40
3.
PAGE 41
4.
PAGE 42
9.White- Balance, Luminance Adjustment Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. How to setting MEM channel you can reference to chroma 7120 user guide or simple use “SC” key and “NEXT” Key to modify xyY value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance adjust . 1. Setting the color temp. A. 6500K: x=313±20 ，y=329±20 Warm color temp. parameter is B. 7300K Normal color temp.
PAGE 43
2. Switch the MEM. Channel to Channel 9 (with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x=283±20，y=297±20 4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100 5. Adjust the GREEN on factory window until chroma 7120 indicator reached the value G=100 6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100 7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2 D.
PAGE 44
10.
PAGE 45
11. BOM List Note: The parts information listed below are for reference only, and are subject to change without notice. Please go to http://cs.tpv.com.cn/hello1.asp for the latest information. HDBMNZNEAHA1DNE Location Part No. 052G HDCP-SMT E07801 2191 A Description PAPER TAPE 070GHDCP500HDC HDCP CODE 078G025A 3 VA SPEAKER 4 OHM 2.
PAGE 46
E09504 S95G176T12W01 FFC CABLE E09501 S95G179T30PE40 FFC CABLE 30P 217mm 1.
PAGE 47
E08902 089G 715HAAE01 SIGNAL CABLE E08903 089G1745HAA DVI CABLE 1.5M E08901 089G402A15N HL AC POWER CORD 1500mm H40G 001624 1A CARTON LABEL BARCODE 1 H40G 24N61546A e2450Swh id label PRC Q41G78D161528A AOC AP WARRANTY CARD 808GE2450SWHRSA E2450SWH 089G 173 56 4B AUDIO CABLE E08908 089G 184HAA500 HDMI CABLE 1800mm E08902 089G 715HAAE01 SIGNAL CABLE E08903 089G1745HAA DVI CABLE 1.
PAGE 48
E08902 089G 715GAAE01 SIGNAL CABLE E08903 089G1745GAA DVI CABLE E08901 089G404A15N HL AC POWER CORD 1500mm H40G 001624 1A CARTON LABEL BARCODE 1 H40G 24N61546A e2450Swh id label PRC Q41G78D161528A AOC AP WARRANTY CARD GND1 009G6005 1 GND TERMINAL U902 056G 139 9 IC EL817M(X) photocoupler DIP-4 NR901 061G 9 5810X NTCR 8R 20% 4W 8D2-14 MCS C908 063G107K474 6S 0.47UF +-10% C907A 067G 40Z47015K EC 47UF 20% 450V 12.5*35 C907 067G 40Z47015K EC 47UF 20% 450V 12.
PAGE 49
709G4747 HM001 COMSUPTIVE ASS'Y Q901 057G 667941 MOSFET P0765ATF 7 650 TO-220F HS1 090G6064 1 HEAT SINK 0M1G 930 8120 SCREW 3x8 055G Q51G 23524 6 WELDING FLUX WITHOUT PB 4509 GLUE_RTV Q55G 100625 TIN STICK_LOW ARGENTUM U901 056G 379529 AC/DC CONVERTER IC LD7576AGR SOP-7 RJ801 061G0805000 JF RST CHIPR 0 OHM +-5% R916 061G08051002FT RST CHIP 10K 1/8W 1% R907 061G0805102 JT RST CHIPR 1K OHM +- 5% 1/8W R928 061G0805103 JF RST CHIPR 10K OHM +-5% 1/8W FENGHUA R918 061G0805103 JT
PAGE 50
C813 067G315M1016KV EC 100UF 20% 35V 8*7 CN802 311GB254B04AAL PIN HEADER 2.54mm 4P V/T - 9.16mm CN801 311GB254B07AAL PIN HEADER 2.54MM 7P 5P7.2MM/2P4.
PAGE 51
C922 367G415X4713AT EC 470uf 20% 16V C918 367G415X6814AT EC 680uf 20% 25V 10x20 RS 709G4744 HA001 CONSUMPTIVE ASS'Y E715 715G4744P01003001C PWR PCB FR1 SS 193X132+1.6(mm) E715 715G4744P01003001M PWR PCB FR1 SS 193*132*1.
PAGE 52
SW003 077G603S AI HJ TACT SWITCH AI 2PIN SEALED SW004 077G603S AI HJ TACT SWITCH AI 2PIN SEALED SW005 077G603S AI HJ TACT SWITCH AI 2PIN SEALED SW001 077G603S AI HJ TACT SWITCH AI 2PIN SEALED E715 715G4747K02000001C KEY PCB FR1 SS 135*11*1.6mm U401 056G 562392 SCALER NT68677UMFG/E QFP-128 U704 056G 563125 C LDO G1117-18PT43U 1A 1.8V TO-252 7v U702 056G 563512 C HF LDO G1117-33PT43U 1A 3.
PAGE 53
R139 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN R138 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN R137 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN R136 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN R135 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN R702 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R630 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R461 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R460 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R408 061G040
PAGE 54
R462 061G0402153 JT RST CHIP 15K 1/16W 5% TZAI YUAN R120 061G0402222 JT RST CHIP 2K2 1/16W 5% TZAI YUAN R121 061G0402222 JT RST CHIP 2K2 1/16W 5% TZAI YUAN R415 061G0402222 JT RST CHIP 2K2 1/16W 5% TZAI YUAN R427 061G0402222 JT RST CHIP 2K2 1/16W 5% TZAI YUAN R752 061G0402223 JT RST CHIP 22K 1/16W 5% TZAI YUAN R723 061G0402223 JT RST CHIP 22K 1/16W 5% TZAI YUAN R610 061G0402223 JT RST CHIP 22K 1/16W 5% TZAI YUAN R609 061G0402223 JT RST CHIP 22K 1/16W 5% TZAI YUAN R608 061G0402223
PAGE 55
R613 061G0603000 JT RST CHIP MAX 0R05 1/10W TZAI YUAN R614 061G0603000 JT RST CHIP MAX 0R05 1/10W TZAI YUAN R420 061G0603331 JT RST 0603 330R 5% 1/10W R429 061G0603471 JT RST CHIPR 470OHM +-5% 1/10W TZAI YUAN R454 061G1206301 JT RST CHIPR 300 OHM +-5% 1/4W TZAI YUAN R455 061G1206301 JT RST CHIPR 300 OHM +-5% 1/4W TZAI YUAN C474 065G040210412K Y CAP 0402 100NF 10% 16V X7R C472 065G040210412K Y CAP 0402 100NF 10% 16V X7R C436 065G040210412K Y CAP 0402 100NF 10% 16V X7R C429
PAGE 56
C625 065G0402105A5K T CAP 0402 1UF 10% 10V X5R C623 065G0402105A5K T CAP 0402 1UF 10% 10V X5R C614 065G0402105A5K T CAP 0402 1UF 10% 10V X5R C612 065G0402105A5K T CAP 0402 1UF 10% 10V X5R C611 065G0402105A5K T CAP 0402 1UF 10% 10V X5R C605 065G0402105A5K T CAP 0402 1UF 10% 10V X5R C419 065G0402105A5K Y NO-SUGGEST CAP 0402 1UF 10% 10V X5R C112 065G040222031J A CAP 0402 22PF J 50V NPO C111 065G040222031J A CAP 0402 22PF J 50V NPO C615 065G040222131J T CAP CHIP 0402 220pF
PAGE 57
C403 065G080510615K T CHIP 10uF 16V X5R 0805 C402 065G080510615K T CHIP 10uF 16V X5R 0805 C603 065G120622615K T CAP CHIP 1206 22UF K 16V X5R FB410 071G 56K121 TA CHIP BEAD 120R/6000mA HCB2012KF-121T60 FB601 071G 56K121 TA CHIP BEAD 120R/6000mA HCB2012KF-121T60 FB602 071G 56K121 TA CHIP BEAD 120R/6000mA HCB2012KF-121T60 FB603 071G 56K121 TA CHIP BEAD 120R/6000mA HCB2012KF-121T60 FB604 071G 56K121 TA CHIP BEAD 120R/6000mA HCB2012KF-121T60 FB605 071G 56K121 TA CHIP BEAD 120R/6000mA