ViewSonic VSXXXXX manual

V iewSonic VG2427wm Model No. VSXXXXX 23.6” Color TFT LCD Display (VG2427wm_SM Rev . 1a Mar . 2009) ViewSonic 381 Brea Canyon Road, W alnut, California 91789 USA - (800) 888-8583 Service Manual[...]

2 Copyright Copyright © 2008 by V iewSonic Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, tran scribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, elec tronic, mechanical, magnetic, optical, chemical, manual or otherwise, without th[...]

3 T ABLE OF CONTENTS 1. Precautions and Safety No tices ......................................................................................... 4 2. Specifi cation .............................................................................................................. ......... 7 3. Front Panel Function Control Descr iption ................[...]

4 1. Precautions and Safety Notices 1. Precautions and Safety Notices 1.1 Safety Precautions This monitor is manufactured and tested on a ground principl e that a user ’ s safety comes first. However , improper use or installa tion may cause damage to the monitor as we ll as the user . Carefully go over the following WA RNINGS before installi ng [...]

5 1.4 Handing and Placing Methods Correct Methods: Incorrect Methods: Only touch the metal frame of the LCD panel or the front cover of the monitor. Do not touch the surface of the polarizer. Surface of the LCD panel is pressed by fingers and th at may cause “Mura.” Take out the monitor Taking out the monitor by grasping the LCD pan el. That ma[...]

6 Place the monitor on a clean and soft foam pad. Placing the monitor on foreign object s. That could scratch the surface of t he panel or cause “Mura.” Place the monitor on the lap, the panel surface must be upwards. The panel is placed facedown on the lap. That may cause “Mura.”[...]

7 2. S pecification[...]

8 3. Front Panel Function Control Description Use the buttons on the front control panel to display an d adjust the OSD controls which display on the screen. The OSD controls are explained at the top of t he next page and are defined in “M ain Menu Controls”.[...]

9 Do the following to adjust the display setting: 1. To display the Main Menu, press button [1]. NOTE: All OSD menus and adjustment sc ree ns disappear automatically after about 15 seconds. This is adjustable through the OSD timeout setting in the setup menu. 2. To select a control to adjust, pres s or to scroll up or down in the Main Menu. 3. Afte[...]

10 Main Menu Controls Adjust the menu items shown below by using the up and down buttons. Control Explanation Auto Image Adjust automatically sizes, ce nt ers, and fine tunes the video signal to elimi nate waviness and distortion. Press the [2 ] button to obtain a sharper image. NOTE: Auto Image Adjust works with most common video cards. If this fu[...]

11 Information displays the timing mode (video si gnal input) coming from the graphics card in the computer, the LCD model number, the serial num ber, and the ViewSonic® website URL. See your graphics card’s user guide for instructions on changing the resolu tion and refresh rate (vertical frequency). NOTE: VESA 1920 x 1080 @ 60Hz (recommended) [...]

12 Language Select allows the use r to choose the language used in the menus and control scre ens. Resolution Notice advises the optimal resolution to use. OSD Position allows the user to move the OSD menus and co ntrol screens. OSD Timeout sets the length of time the OSD screen is displayed. For example, with a “15 second” setting, if a contro[...]

13 4. Circuit Description 4.1 Main Board U401 NT68667UFG/C The NT68667 is a highly integrated flat panel di splay cont roller that interfaces analog, digital, and video inputs. It combines a triple ADC, a DVI compliant TMDS receiver, a digital YUV receiver, a high quality zoom and shrink engine , a multi-color o n screen display (OSD) controller , [...]

14 Pin Assignment[...]

15[...]

16[...]

17[...]

18 U701 AP1 1 17D33L and U704 AP1 1 17E18LA: DC power convert, convert to 3.3v and 1.8v . AP1117 is a low dropout positive adjustabl e or fixed-mode regulator with 1A out put current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications such a s high-speed bus termination and low curren t [...]

19 Pin Descriptions Name I/O Pin # Function Adj (GND) I 1 A resistor divider from this pin to the Vout pin and ground sets the output voltage. (Ground only for Fixed-Mode) Vout O 2 The output of the regulator. A minimum of 10uF capacitor (0.15   ESR  20  ) must be connected from this pin to ground to insure stability. Vin I 3 The input [...]

20 4.2 Power Board IC901 LD7576 The LD7576X series bring high performance, combines with highly integrated fu nctions, protections and EMI-improve solution. It’s an ideal solution for those co st-sen sitive system, reducing component count and o verall system cost. The LD7576X series features n ear-lossless high voltage startup ci rcuit, green-mo[...]

21 Block Diagram Pin Name Function 1 CT This pin is to program the frequen cy of the low frequency timer. By connecting a capacito r to ground to set the OLP delay time. And this pin can be used for latch mode protect ion. By pulling this pin lower than 0.8 V, the controlle r will be entered latch mode until the AC power-on recy cling. 2 COMP Volta[...]

22 IC801 T A9687GN TA 9687 is a high performance, cost-effective CCFL (Col d Cathode Fluore scent Lamp) controll er designed for driving large-size Liquid Crystal Display (LCD) appli cations requiring 2 to 6 CCFLs. The controller converts unregulate d DC voltages into a nearly sinusoidal lamp voltage and current waveforms. The TA 9687 supports full[...]

23 Pin Description Pin No. I/O1 Names Description 1 I VSEN Voltage Sense Feedback 2 I/O SSTCMP Capacitor for Soft-Start and Loop Compensation 3 I/O CT Timing Resistor and Cap acitor for Operation and Striking Freque ncy 4 I/O RT1 Timing Resistor for Striking Frequency 5 --- GNDA Signal Ground 6 O PDR2 High Side Driver Output 2 7 --- GNDP Power Grou[...]

24 5 . A d j u s t m e n t P r o c e d u r e 5.1 White balance, Luminance adjustment Approximately 2 Hours should be allo wed for warm up before proceeding White-Balance adjustme nt. Before started adjust white balance, please setting the Chroma-C7120 MEM. Channel 0 to9300 0 K colors, MEM. Channel 1 to 7500 0 K colors, MEM. Channel 2 to 6500 0 K ME[...]

25 e. Adjust sRGB (sRGB) color-temperature 1. Switch the Chroma-C7120 to RGB-mode (with press “M ODE” butt on) 2. Switch the MEM.channe l to Channel 4 (with up or down arrow on Chroma-C7120) 3.The LCD-indicator on Minolta-CA210 will show x = 313 ±12, y = 329 ±12, Y = 80 ±15 cd/m 2 10. press “1” key to save adjust value a nd exit . T urn [...]

26 Hardware Connect status 5.2.2 Up date the NOV A TEK’S firmware Y ou should jump the pin to “For Flash” at ISP Board LPT Cabl e VGA Cable Connect to the PC LPT Connect to the VSC V A2427wm[...]

27 Double click “W riter .exe” This tool can auto detect the right SCALAR programe spee d,the process as follow:[...]

28 When auto detect is finished,click “Loa d Hex”,then chosse the firmware that you want to update Click “Auto”,then the update will begin. W ait for a moment until the bar is 100%,the program windows will show “Programing Success”.This mean s the update is successful.[...]

29 5.3 DDC Key in Procedure Note: 1. Every time after replacing the main board, you have to do the DDC key in. 2. If you find the DDC does not conform to the LCD TV, you have to do the DDC key in. 5.3.1 Equipment Needed - VG2427wm - PC (Personal compute r) - LPT cable - 12V DC - Firmware upgrade pro gram - DDC Card 5.3.2 Inst all soft ware Y ou mus[...]

30 For analog a. Double-click ， appear as follow Figs ： b. Click . c. Key in the Serial Number printed on the barcode label, then click “OK”[...]

31 d. Unit appears the following Fig, writer completed. 12 codes, for example. R3V080100001[...]

32 6. T roubleshooting Flow Chart[...]

33 7 . B l o c k D i a g r a m 7.1 Main Board Scalar IC NT68667 (Include MCU, ADC, OSD) (U401) D-Sub Connecto r (CN101) EEPROM PM25L V020-100SCE (U402) DVI_SCL DVI_SDA LCD Interface (CN302) Key Control interface (CN404) Crystal 12MHz (X401) DVI Connector (CN102) EEPROM M24C02 (U108) EEPROM M24C02 (U102) DVI_SCL DVI_SDA H sync V sync RGB D-DA T A D-[...]

34 7.2 Power Board DIM EMI filter S tart Circuit: R904, R905,R906 PWM Control IC LD7576 T ransfor mer AC input 16V ON/OFF Control Feedback Circuit T ransfor mer MOSFET Lamp ON/OFF 5V Bridge Rectifier and Filter Feedback Circuit Rectifier diodes CN902 Output Circuit PWM Control Over V oltage[...]

35 8 . S c h e m a t i c D i a g r a m s 8.1 Main Board 1 6 2 7 3 8 4 9 5 11 12 13 14 15 10 17 16 C N 101 DB 15 R120 1K 1/ 16W 5% R 102: 100 Ohm ->0 Ohm I/O1 1 GN D 2 I/O2 3 I/O 3 4 VD D 5 I/O 4 6 U 105 AZ C 199-04S DS UB_5V ESD _5V ESD _5V ESD _5V DV I_ 5V 5VC C R1 42 0 OH M +-5% 1/16W ESD_5V 1K CHANGE TO 0R LG 20081029 ADD D101 LG 20081029 Add[...]

36 +5V +5V Q302 2N 3904S-R TK/P S R3 0 2 220 OH M 1/ 4W PPW R_ON # 5 V CC3 .3 V CC3 .3 1 2 FB 3 0 1 120 OH M R4 4 5 3. 9K OH M 1/ 16W L E D_ G RN/B L UE 5 POWER _KEY # 5 KEY 2 5 KEY 1 5 LED _LF _BLU E 5 LED _OR AN GE 5 R44 3 3. 9K OH M 1/ 16W R3 0 3 4K7 1/ 16W 5% 1 2 Z D 401 UD Z SN P5.6B T O UCH_ P O WE R 1 2 Z D 402 U D Z SN P5. 6B 1 2 ZD4 03 UDZ[...]

37 C 703 N C / 0. 1U F 16V O E M MO D E L Siz e Re v Da te Sheet of T PV M OD EL PC B N AM E 称爹 T P V ( T op V i ctor y E l e ctro n i cs Co . , L td . ) Key Component 絬 隔 瓜 絪 腹 <D o c > 1 . B 46 T ues day , March 17, 2009 < 称爹 > 4. POW ER G3226-1-X -X -6-09 0317 VSC VG2427 C7 1 1 N C / 0. 1U F 16V TO252 AD J 1 Vout 2 [...]

38 EE_WP T0M 3 T0P 3 T1M 3 T1P 3 T2P 3 T2M 3 T3M 3 T3P 3 TC L K 1 P 3 TC L K 1 M 3 T4M 3 T6M 3 T4P 3 T7P 3 T5P 3 TC L K 2 M 3 T6P 3 T7M 3 TC L K 2 P 3 T5M 3 C4 0 3 1uF 16V C0 6 03 C4 0 4 1uF 16V C 0603 LED _LF _BLU E 3 MU TE 4 R 454 100R 1/ 1 6W 5% Q401 2N 3906S-R TK/PS Q402 2N 3906S-R TK/PS SPI _C K SPI _SI R4 7 2 100R 1/ 10W 5% OEM M OD EL Size R[...]

39 8.2 Power Board R903 100K O MH 2W + - 5% L904 Coi l VSC CHANGE JUMP WIRE REV:B ADD CN903(USB 称ノ ) R927 10K 1/10W 1% +5V +16 V +5V C 921 1000pF 250V Q903 KT D 1028 C 912 0. 001uF 1 4 2 3 L901 27mH R962 100 O HM 1/4W 1 2 3 4 5 6 7 8 9 10 11 12 13 C N 902 CO NN R920 100 O HM 1/4W R946 100OH M 2W D 903 I N 4148 C 940 0. 047uF +5V 1 + C93 4 NC + [...]

40 C8 1 0 0. 0033 uF 6 2 7 5 1 8 P T 801 POWER X' FM R VSC S2 1 G2 2 S1 3 G1 4 D1 5 D1 6 D2 7 D2 8 Q806 AO4620 VSEN 1 SST C M P 2 CT 3 RT 1 4 GN D A 5 PD R 2 6 GN D P 7 NDR2 8 NDR1 9 PD R 1 10 VD D A 11 TI ME R 12 PW M 13 I SEN 14 OVPT 15 EN A 16 I C 801 t a9687GN-A-0-T R R8 30 6K8 1/ 8W 5% R8 28 6. 2M OH M 1 W R8 36 56K 1/10W 5% 1 2 ZD8 0 3 R[...]

41 SH U T D OW N 1 BY P ASS 2 RIN- 3 GN D 4 GN D 5 LI N - 6 VOLU M E 7 SE/ BT L 8 LOU T - 9 VD D 10 LOU T + 11 GN D 12 GN D 13 RO UT + 14 VD D 15 RO UT - 16 IC6 0 1 APA2069J I T U L C6 1 4 0. 1uF / 16V IC with Heat -sink(90G6295-3) LOU T - VSC Lin Ri n Q608 MMB T3 9 0 4 D6 0 1 I N 4148 Q607 M M BT 3906 R 613 1K 1/ 10W 5% R 610 10K 1/ 10W 5% R 611 5[...]

42 8.3 Key Board R 001 3K 1/ 10W 1% 3 4 1 2 LED 001 LED C 002 0. 1uF 16V UP KEY2 POWER KEY1 BLU E Y ELLOW GN D Y ELLOW BLU E C0 0 1 0. 1 uF 16V 1 3 5 2 4 6 8 7 9 10 SW01 SW UP DO WN DOWN 1 2 3 4 5 6 CN0 0 1 C ABL E GN D R 002 3K 1/ 10W 1% D1 0 1 UDZS NP 5 .6 B KEY 2 KEY 1 R 003 2K OH M 1% 1/ 10W R 004 2K OH M 1% 1/ 10W OEM M OD EL Siz e Re v Da te [...]

43 8.3 USB Board C710 0.1uF / 16V GND_ U DM 3 GND_ U DP3 C711 0.1uF / 16V DM 4 C712 0.1uF / 16V DP4 C706 10nF16V GND_ U C707 0.1uF / 16V GND_ U DM 4 DP3 R732 NC / 0R 05 1/ 16W 1 2 ZD 707 NC / EGA10603V05A1-B GND_ U /OCS 4 1 2 ZD 709 NC / EGA10603V05A1-B GND_ U R729 NC/15K 1/16W 5% DM 3 1 4 2 3 L705 NC R734 NC/10K 1/16W 5% 1 2 ZD 710 NC / EGA10603V0[...]

44 9 . P C B L a y o u t D i a g r a m s 9.1 Main Board[...]

45[...]

46 9.2 Power Board[...]

47[...]

48 9.3 Key Board 9.3 USB Board[...]

49[...]

50 10. Exploded Diagram and Exploded Part s List 10.1 EPL[...]

51 Item Description Part Number Q'ty 1 BEZEL A34G0935 K RB1B0130 1 2 LENS A33G0529 1 1L0100 1 3 KEY PCB KEPC8AA9 1 4 KEY PAD A33G0528 AS 1L0100 1 5 PANEL 750GLM236H1111 N0VS 1 6 POWER BOARD PWPC9D41MQWU 1 7 MAIN BOARD-CBPCRNDVSQ1 756GQ8CB VV071 1 8 SPEAKERS 078G 311 20 G 1 9 MAIN FRAME A15G048930 1 1 10 SHIELD-AC A85G0133101 1 11 REAR COVER A3[...]

52 10.2 PPL Item Description Part Number Q'ty 1 Signal cable 089G 728CAA DB 1 2 Audio cable 089G 17356X553 1 3 DVI cable 089G1748HA A AC 1 4 Power cable 089G402A18N IS 1 5 EPS(top) Q44GD020101 1 6 LCD Monitor --- 1 7 Manual Q70G2401709 3A 1 8 EPS(bottom) Q44GD020201 1 9 Carton Q44GD020709 1A 1[...]

53 1 1 . R e c o m m e n d e d S p a r e P a r t s L i s t TDRMNDDKWBVSPC Location Part Number Description Remark 019G6014 1 TIE FOR STRAP 023G3178709 3A LOGO 041G 68508 A CONTROL CARD 050G 600 1 W WHITE STRAP 050G 600 2 HANDLE1 050G 600 3 HANDLE2 052G 1 185 24 VSC T APE 052G 1 186 SMALL T APE 052G 121 1 A CONDUCTIVE T APE 55MM *45MM *0.08MM 052G 2[...]

54 A34G0936 KR 3B0100 REAR COVER 23.6" A85G0133101 SHIELD-AC AM1G1740 12225 CR3 SCREW 040G 45762412B CBPC LABEL CN701 033G3802 9B Y W W AFER CN404 033G8019 6C CONN.6P 1.0 DIP CN302 033G8027 30 W AFER 30P 2.0MM DIP DUAL ROW CN101 088G 35315F XH D-SUB 15PIN VERTICA L CONN WITH SCRE W CN102 088G 35424F XH DVI 24PIN CONN F A TT ACHED SCREW X401 09[...]

55 R105 061G0402101 RST CHIPR 100 O HM +-5% 1/16W R109 061G0402101 RST CHIPR 100 O HM +-5% 1/16W R1 1 1 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R1 13 061G0402101 RST CHIPR 100 OHM +-5 % 1/16W R1 19 061G0402101 RST CHIPR 100 OHM +-5 % 1/16W R404 061G0402101 RST CHIPR 100 O HM +-5% 1/16W R409 061G0402101 RST CHIPR 100 O HM +-5% 1/16W R417 061G040210[...]

56 R401 061G0402470 0F RST CHIPR 0402 470 OH M +-1% 1/16W R1 10 061G0402471 RST CHIPR 470 OHM +-5 % 1/16W R303 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R138 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R137 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R136 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R306 061G0402563 RST CHIP 56K 1/16W 5% R1 16 061G0402750[...]

57 C302 065G0402224 17 CAP CER 0.2 2UF -20%-80% C401 065G0402224 17 CAP CER 0.2 2UF -20%-80% C102 065G0402473 12 CHIP 0.047 UF 16V X7R C106 065G0402473 12 CHIP 0.047 UF 16V X7R C108 065G0402473 12 CHIP 0.047 UF 16V X7R C1 10 065G0402473 12 CHIP 0.047UF 16V X7R C1 1 1 065G0402473 12 CHIP 0.047UF 16V X7R C1 14 065G0402473 12 CHIP 0.047UF 16V X7R C105[...]

58 ZD401 093G 39S 34 T UDZS NP5.6B ROHM ZD402 093G 39S 34 T UDZS NP5.6B ROHM ZD403 093G 39S 34 T UDZS NP5.6B ROHM D102 093G 64 42 PP BA V70 SOT -23 D103 093G 64 42 PP BA V70 SOT -23 R148 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R149 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R151 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R150 061G0402101 RST CHIPR [...]

59 CN801 033G8021 2E F WA FER IC903 056G 139 3A IC PC123Y22FZ0F IC601 056G 616 34 IC AP A2069JITUL 2.6 W*2 PDIP-16 NR901 061G 58809MEN RST NTCR 8OHM £«£ 20£¥ 4A XIANZHENG C904 063G107K224 UM X2 CAP 0.22UF K 275V AC C819 065G 3J5606ET CAP CER 56PF J 3KV C820 065G 3J5606ET CAP CER 56PF J 3KV C821 065G 3J5606ET CAP CER 56PF J 3KV C822 065G 3J5606[...]

60 0M1G 930 8120 SCREW HS1 Q90G6263 6 HEA T SINK 705GQ893039 D908 ASS'Y D908 093G 60278 DIODE SP1060 ITO-220 SECOS 0M1G 930 8120 SCREW HS2 Q90G6263 6 HEA T SINK 705GQ893040 D906 ASS'Y D906 093G 52 66 DIODE FMX-12SL 10A/200V T O-220 0M1G 930 8120 SCREW HS3 Q90G6264 5 HEA T SINK 709G2824 QM001 CONSUMPTIVE ASS'Y 055G 2 ALCOHOL 055G 2352[...]

61 R840 061G0603105 RST CHIPR 1M OHM +-5% 1/10W R841 061G0603105 RST CHIPR 1M OHM +-5% 1/10W R930 061G0603243 1F RST CHIPR 2.43K OHM +-1% 1/10W R927 061G0603360 1F RST CHIPR 3.6K OHM +-1% 1/10W R808 061G0603390 0F RST CHIPR 390 OHM +-1% 1/10W R845 061G0603512 RST CHIPR 5.1 KOHM +-5% 1/10W R844 061G0603512 RST CHIPR 5.1 KOHM +-5% 1/10W R843 061G0603[...]

62 R935 061G1206101 RST CHIPR 100 OHM +-5% 1/4W R920 061G1206101 RST CHIPR 100 OHM +-5% 1/4W R919 061G1206101 RST CHIPR 100 OHM +-5% 1/4W R918 061G1206101 RST CHIPR 100 OHM +-5% 1/4W R912 061G1206221 RST CHIPR 220 OHM +-5% 1/4W R909 061G1206339 RST CHIPR 3.3 OHM +-5% 1/4W R904 061G1206822 RST CHIPR 8.2 KOHM +-5% 1/4W R905 061G1206822 RST CHIPR 8.2 [...]

63 C929 065G1206102 72 CAP CHIP 1206 1000PF K 500V X7R C912 065G1206102 72 CAP CHIP 1206 1000PF K 500V X7R FB902 071G 57G800 B CHIP BEAD HCB3216KF-800T30 BULL WILL D806 093G 64 42 P BA V70 SOT23 BY P AN JIT D807 093G 64 42 P BA V70 SOT23 BY P AN JIT D808 093G 64 42 P BA V70 SOT23 BY P AN JIT ZD802 093G 39S 24 T RLZ 5.6B LLDS ZD803 093G 39S 24 T RLZ[...]

64 Q37G0139013 VSC 23.6 HINGE ASS'Y Q40G 58170931A HT POT LABEL Q40G0001624 4A P ALLET LABEL Q40G000270927A EP A LABEL Q44G6002123 93 P APER BOARD Q44G6002CP1A27 P APER CAP Q44G9003220 CORNER P APER Q44GD020101 EPS Q44GD020201 EPS Q44GD020709 1A 23 LCD CART ON Q45G 77 5 PE P ACKING Q45G 88609120 EPE BAG Q50G 4 10 TIE Q52G6020139 PROTECT FILM U[...]

65 R718 061G0402104 RST CHIPR 100 KOHM +-5% 1/16W R719 061G0402104 RST CHIPR 100 KOHM +-5% 1/16W R720 061G0402104 RST CHIPR 100 KOHM +-5% 1/16W R724 061G0402105 RST CHIPR 1MOHM +-5 % 1/16W R709 061G0402153 RST CHIP 15K 1/16W 5% R726 061G0402153 RST CHIP 15K 1/16W 5% R721 061G0603120 2F RST CHIPR 12 KOHM +-1% 1/10W R750 061G0603360 1F RST CHIPR 3.6K[...]

66 E08904 089G 17356X553 AUDIO CABLE Q41G2401709 3A V A2413WM SERVICE INSER T Q41G2401709 7A VG2427WM QSG FOR LI Q45G2007M0102A PE BAG FOR MANUAL Q70G2401709 3A VG2427WM CD MA NUAL 040G 581 26704 SHIPPING LABEL 040G 58162435A P/N LABEL FOR MANUAL PE BAG Q40G 24N709 2A RA TING LABEL Q40G 581709 1B CART ON LABEL Q40G0001709 2A SN LANEL 12. Different [...]

67 * Reader ’ s Response* Dear Readers: Thank you in advance for your feedback on our Service Manual, which allows continuous improvement of our products. W e would appreciat e your completion of the Assessment Matrix below , for return to V i ewSonic Corporation. Assessment A. What do you think about the cont ent of this Service Manual? Unit Exc[...]