ViewSonic VX1940W-2 Service Manual
  1. Manuals
  2. Brands
  3. ViewSonic Manuals
  4. Monitor
  5. VX1940W-2
  6. Service manual
ViewSonic VX1940W-2 Service Manual

ViewSonic VX1940W-2 Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

19" LCD
Service
Service
Service
Description

Table Of Contents......................................................1

Revision List........................................................2
Precautions and Safety Notices....................................3
1. Monitor Specification........................................... 4
2 . L C D M o n i t o r D e s c r i p t i o n ... ... ... . . . . . . . 1 3
3.1 Front Panel Hardware Controls............................13
3.2 Function descriptions...................................14
4. Input/Output Specification..................................16
5. Schematic Diagram ...........................................19
5.1 Ma in bo ard ...........................................19
5.2 Powe r board ...........................................24
5.3 OSD Key PAD ...........................................27
6. PCB layout diagrams ...........................................27
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.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
ViewSonic Corporation
TABLE OF CONTENTS
Page
7. Trouble shooting flow chart........................33
8. .Mechanical Instructions.............................35
9. Exploded diagram.......................................41
10. BOM List............................................43
11. Different parts list.....................................57
SAFETY NOTICE
- 1 -
Page Description

Advertisement

Table of Contents
loading

Related Manuals for ViewSonic VX1940W-2

Summary of Contents for ViewSonic VX1940W-2

  • Page 1: Table Of Contents

    19” LCD View Sonic VX1940W-2 Service Service Service TABLE OF CONTENTS Description Page Description Page 7. Trouble shooting flow chart…………………...33 Table Of Contents..……......…..1 8. .Mechanical Instructions.…………………..35 Revision List.…........……..2 9. Exploded diagram……………......41 Precautions and Safety Notices…………....……..3 10. BOM List….………………………………….43 1. Monitor Specification......………..4 2 .

  • Page 2: Revision List

    19” LCD View Sonic VX1940W-2 Revision List Version Release Date Revision History TPV Model T96MNBDKIWVSNNN NOV-5-2008 Initial Release T96MNBDKIWVSNND - 2 – ViewSonic Corporation...

  • Page 3: Precautions And Safety Notices

    19” LCD View Sonic VX1940W-2 Precautions and safety notices safety precautions This monitor is manufactured and tested on a ground principle that a user’s safety comes first. However, improper use or installation may cause damage to the monitor as well as the user. Carefully go over the following WARNINGS before installing and keep this guide handy.

  • Page 4: Monitor Specification

    19” LCD View Sonic VX1940W-2 1. Monitor Specifications 1.1 specifications VSAP VSCN Region (E)/(U) Product Name VX1940w-2 Model Number VS11868 English, French, German, Italian, Spanish, Finnish, OSD Languages Russian, Korean, Japanese, Traditional Chinese, Simplified Chinese TFT LCD Panel and Model #...
  • Page 5 19” LCD View Sonic VX1940W-2 Separate, Composite, and Sync on Green 2. TMDS (Digital) Video Impedance 75 Ohms (Analog), 100 Ohms (Digital) Maximum PC Video Signal 950 mV with no damage to monitor Maximum Mac Video Signal 1250 mV with no damage to monitor...
  • Page 6 19” LCD View Sonic VX1940W-2 @ CR>10 Viewing Angle (Horizontal) Typical: Ultra –TN type Minimum: 150 @ CR>10 Viewing Angle (Vertical) Typical: Ultra –TN type MINIMUM: 140 Response Time Typical = 5ms (on/off) 10%-90% @ Ta=25°C Maximum = 15ms (on/off) Panel Defects Please see Panel Quality Specifications.
  • Page 7 19” LCD View Sonic VX1940W-2 1.5 Image performance Display Size Horizontal Display Size, Primary Preset Full Screen Vertical Display Size, Primary Preset Full Screen Luminance JUDGMENT Item Condition Contrast = 100% LV (MAX) = THE LUMINANCE IN Lv (Max) Brightness = 100% SECTION 4-7 “TFT LCD PANEL”...
  • Page 8 19” LCD View Sonic VX1940W-2 Contrast Ratio Contrast = Default Brightness = Default NO VISIBLE SATURATION Test Pattern = 64-Gray Contrast = 100% 12-16 LEVEL SATURATION Brightness = 100% Test Pattern = 64-Gray Dynamic Contrast Ratio CR(Max) –Condition: CCT=USERCOLOR 3000 :1 (typ) (R/G/B=100%) “Dynamic...
  • Page 9 19” LCD View Sonic VX1940W-2 DCR will calculate the gray level histogram in a frame and set backlight brightness target as below: Gray Level Backlight (Frame Average) Brightness 0 ~ 7 8 ~ 15 16 ~ 23 24 ~ 31...
  • Page 10 19” LCD View Sonic VX1940W-2 To adjust Gamma data for different frame luminance λ The contrast/data delta percentage is less than 10% of original value. Adaptive Contrast Adjustment λ Low level noise can not occur during adaptive contrast adjustment. λ...
  • Page 11 19” LCD View Sonic VX1940W-2 data noise. 1. Disable Contrast/Brightness menu and hot key control. CR/BT user settings are stored for later retrieval. 2. Brightness level is based on DCR calculation and OSD Control Limitation (DCR on) independent from OSD setting.
  • Page 12 19” LCD View Sonic VX1940W-2 ● Power Supply, and Grounding Artifacts : No visible artifacts in any specified video mode within the horizontal or vertical frequency range of the monitor ● Temperature Drift : Image shall not drift or lose fine-tune adjustment 1.6 Video communications...

  • Page 13: L C D M O N I T O R D E S C R I P T I O

    19” LCD View Sonic VX1940W-2 2. LCD MONITOR DESCRIPTION 3. Front panel function control description 3.1 Front Panel Hardware Controls Power Switch (Front Head) Power Control, soft Power Switch. Blue– ON Amber – Active Off Power LED (Front Head) Dark = Soft Power Switch OFF...

  • Page 14: Function Descriptions

    19” LCD View Sonic VX1940W-2 OSD must fully appear within 0.5s after pushing Reaction Time Button 1 Short Cuts Function from the button(s) Main Menu Input toggle (D-sub / DVI) [ ▼ ] or [ ▲ ] To immediately activate CR or BT menu.
  • Page 15 19” LCD View Sonic VX1940W-2 Note 2: Power should only be lockable in the “On State” Memory Recall Actions Memory Recall action on the analog and digital mode as below 1. Set the factory defaults as shown in Section 4-8 2.

  • Page 16: Input/Output Specification

    19” LCD View Sonic VX1940W-2 4. Input/output specification 4.1 D-SUB connector pin assignment Pin Number Pin Function Red video input Green video input Blue video input No Connection Ground Red video ground Green video ground Blue video ground H/V sync ground...
  • Page 17 19” LCD View Sonic VX1940W-2 GND for +5V HOT PLUG DETECT DATA0- DATA0+ DATA0/5 Shield DATA5- DATA5+ Clock Shield Clock+ Clock- 4.2 Factory Preset Display Modes Timing table Analog Item Timing Remark 640 x 350 640 x 400 640 x 400 640 x 480 The pixel clock is lower than DVI standard.
  • Page 18 19” LCD View Sonic VX1940W-2 1280 x 768 1280 x 960 1280 x 960 1280 x 960 1280 x 1024 @ 1280 x 1024 @ 1280 x 1024 @ 1360 x 768 1400 x 1050 @ For analog sync, Switch 1400 x 1050@60Hz and 1680 x...

  • Page 19: Main Board

    19” LCD View Sonic VX1940W-2 5. Schematic diagrams 5.1Main board LIPS_5V LIPS_5V LIPS_5V 04_INTERFACE SPK_R+ SPK_R+ SPK_R+ SPK_R- SPK_R- SPK_R- SPK_L+ SPK_L+ SPK_L+ SPK_L- 02_VGA 05_AUDIO ADC_VAA ADC_VAA SPK_L- SPK_L- 03_SCALER CVDD1V8 06_DVI ADC_VAA - 19 – ViewSonic Corporation...
  • Page 20 19” LCD View Sonic VX1940W-2 100M/33ohm VGA_5V VGA_VDD VGA_SCL VSCL RAI+ 0402/ 56R/1% 0402/ 47n/16V/Y BK1608HS330 VGA_SDA VSDA BAV70W/RoHS 0402/ 75R/1% NC/BAV99/RoHS 0402/3. 9K/ 5% VGA_5V VGA_SCL RAI - RI 1- 0402/ 100R/1% 0402/ 47n/16V/Y VGA_SDA RI1- AT24C02B-10TU-1. 8/RoHS NC/0402/100n/16V/Y...
  • Page 21 19” LCD View Sonic VX1940W-2 Scaler VGA_3V3 ADC_VAA CVDD1V8 PVCC VGA_3V3 2,4,5 CVDD1V8 ADC_VAA VGA_3V3 DVDD ADC_VAA 2,4,5 Option for NT68670 DVDD 0402/100n/16V/Y 0402/100n/16V/Y GND_POWER 0402/100n/16V/Y 0402/100n/16V/Y DVDD 2,4,5 0603/10u/6.3V/5/B MCB1608S601EA 0603/0R/RoHS UWT1C221MCL1GS 0402/100n/16V/Y 0402/100n/16V/Y GND_POWER GND_POWER 0402/100n/16V/Y GND_POWER B_D[0..19] B_D[0..19] 4...
  • Page 22 19” LCD View Sonic VX1940W-2 Interface VGA_3V3 LIPS Interface EC50117KAG/3.3V/1A V33S VGA_3V3 2,3,5 DVDD V33S 2,3,5 DVDD 2,3,5 VOUT VOUT 0805/0R/5% 0805/0R/5% ADC_VAA HEADER2X4FR2.54/RoHS EC31QS03L/RoHS LIPS_5V +5V1 ADC_VAA 2,3,5 INV_ADJ 3 INV_ON/OF F 3 MCU_VDD 1206/10u/10V/Y /E 1206/10u/6.3V/5/RoHS LV101M016E055R LIPS_5V 6...
  • Page 23 19” LCD View Sonic VX1940W-2 DVI_SCL 0402/100R/5% DVI_VD D DVI_VD D DVI_SCL DSCL DVI_SDA 0402/100R/5% DVI_SDA DSDA 0402/4.7K/5% 0402/4.7K/5% DVI_VDD CVDD1V8 For 686x5 series DVI Read EDID Fail CVDD1V8 D VI_5V D VI_SCL D VI_SDA DVI_SCL 3 DVI_SDA 3 +5V 2,4 NC /0402/2.2K/5%...

  • Page 24: Power Board

    19” LCD View Sonic VX1940W-2 Audio LIPS_5V 5V_AMP 0603/0R/5% LIPS_5V LV101M016E055R 1206/10u/10V/Y 1206/10u/10V/Y NC/VPORT0603470KV05T MUTE SPK_R- MUTE ROUT- AMP_SHDN 5V_AMP /SHDN 0402/1u/10V/Y 0402/0R/5% RIN- GND_AUDIO SPK_R+ RIN- ROUT+ 0805/2.2u/16V/Y GND_AUDIO BYPASS SE/BTL GND_AUDIO 0402/0R/5% 0402/1u/10V/Y LIN- SPK_L+ 2SJ-05101NC3 LIN- LOUT+...
  • Page 25 !"# /,0123 "#00 !" !! ) " " - ) *% !! ) "!!, $% (! ) *% # 6 # 7 !! ) ' , * ' , * " - $% (! $% ( & & $% ( &...
  • Page 26 ) *%...

  • Page 27: Osd Key Pad

    19” LCD View Sonic VX1940W-2 5.3 OSD KEY PAD [SELECT] [AUTO] [KEY_DOWN] [KEY_UP] [MENU] [PWR_SW] TSZY -2PR TSZY -2PR TSZY -2PR TSZY -2PR TSZY -2PR 7151-E15N-00R AUTO KEY _DOWN KEY _UP MEN U LED_OR 1 LED_GR 1 PWR_SW 19-21VGC/TR8 19-21UY OC/S530-A2/TR8...

  • Page 30: Trouble Shooting Flow Chart

    19” LCD View Sonic VX1940W-2 7. Trouble shooting flow chart - 33 – ViewSonic Corporation...
  • Page 31 Loose or broken pins in the cable connector could cause an improper connection. • Connect the LCD display to another computer. • If you have an older graphics card, contact ViewSonic for a non-DDC adapter. ® Control buttons do not work •...

  • Page 32: Mechanical Instructions

    19” LCD View Sonic VX1940W-2 8. Mechanical instructions Step Figure Description Lay the LCD-TV on a flat, Remove seat soft and clean surface assy Remove Loose and remove 4 cover hinge Screws of Stand Assy. Dismount stand assy - 34 –...
  • Page 33 19” LCD View Sonic VX1940W-2 Use disassembly tool to open the bezel assy , Open the and then open the other bezel assy latches along the edge of the back cover Remove the rear cover Loose and remove 2 Remove...
  • Page 34 19” LCD View Sonic VX1940W-2 Pull out FFC-OSD to AD Board and remove OSD Board. Remove 2 Screws of Remove OSD Board. screws Pull Pull out FFC-OSD to X- FFCs. Board. - 36 – ViewSonic Corporation...
  • Page 35 19” LCD View Sonic VX1940W-2 Pull out 4 Backlight Disconnect Wires. Lamp wires. remove 2 Screws of Remove PCBA Cover. screws Remove Remove Cover AD. Cover AD - 37 – ViewSonic Corporation...
  • Page 36 19” LCD View Sonic VX1940W-2 Loose and remove 4 Remove Screws of D-sub and DVI Jack. screws Remove mylar Remove Remove 4 Screws of Lips. Screws of AD board. - 38 – ViewSonic Corporation...
  • Page 37 19” LCD View Sonic VX1940W-2 Take out Lips Board. Disconnect the power Disconnect the connector board and to remove the power board and the main board main board Pull out 2 The end FFCs Stand Assy Assembly - 39 –...

  • Page 38: Exploded Diagram

    22” LCD View Sonic VA1616W-6 9. Exploded diagram - 40 – ViewSonic Corporation...
  • Page 39 22” LCD View Sonic VA1616W-6 - 41 – ViewSonic Corporation...
  • Page 40 19”LCD View Sonic VX1940W-2 EXPLODED PARTS LIST (T96MNBDKIWVSNNN) ViewSonic Model Number:VX1940w-2 Rev: ViewSonic Item Ref. P/N Description Q'ty PANEL A190Z1 VSC 750GLM90KA232C000Q CMO/SJ0Z101D01 0M1G 330 4120 SCREW 42A9930008 080G L19 7HIB POWER BOARD 089G176J 55N06 FFC CABLE 55P 135MM(Add core)

  • Page 41: Bom List

    19”LCD View Sonic VX1940W-2 10. BOM LIST T96MNBDKIWVSNND Location Part No. Description Remark CBPC8NBVWQ2 CONVERSION BOARD 089G176C 15N15 FFC Cable 15P 127mm / 32-D019529 750GLM90KA232C000Q PANEL A190Z1 VSC CMO/SJ0Z101D01 089G1738SAA600 D-SUB CABLE 1800mm 32-D002132 POWER CORD/(TPV 共用)32-D022438 089G402A18N IS 089G176C 55N00...
  • Page 42 19”LCD View Sonic VX1940W-2 N44G9007VSC 1A Shipping Draw- 79-D018282 089G1748CAA AC SIGNAL CABLE DVI COMLINK 089G 728CAA DB D-SUB CABLE N40G000296820A ZA POP LABEL N52G 1VSC005 mylar 73-d0157632 Conductive Tape 277mm *15mm *0.06mm (单 导） N52G 1VSC010 N40G000296823A HG LABEL- 77-D022377 POWER CORD(32-D022438)(美規)
  • Page 43 19”LCD View Sonic VX1940W-2 Q85G 583603 GASKET_ALUMINIUM FOIL Conductive Tape 75mm *45mm *0.08mm (单 导） 052G 1211527 N45G 88606012 DS pe bag for base N34G0190 ZK 1B CM BEZEL 40-D019513 N34G0189 ZNA1B CM DECORATION 40-D019530 N33G0035 LENS 40-D018272 N33G0034 ZN 1B...
  • Page 44 19”LCD View Sonic VX1940W-2 061G0402100 0F RST CHIPR 100 OHM +-1% 1/16W 061G0402101 RST CHIPR 100 OHM +-5% 1/16W 061G0402101 RST CHIPR 100 OHM +-5% 1/16W 061G0402101 RST CHIPR 100 OHM +-5% 1/16W 061G0402101 RST CHIPR 100 OHM +-5% 1/16W...
  • Page 45 19”LCD View Sonic VX1940W-2 061G0402240 0F RST CHIPR 0402 240 OHM +-1% 1/16W 061G0402330 RST CHIPR 33 OHM +-5% 1/16W 061G0402330 RST CHIPR 33 OHM +-5% 1/16W 061G0402330 RST CHIPR 33 OHM +-5% 1/16W 061G0402330 RST CHIPR 33 OHM +-5% 1/16W...
  • Page 46 19”LCD View Sonic VX1940W-2 065G0402101 31 CHIP 100PF 50V NPO 065G0402102 12 CAP CHIP 0402 1nF K 16V X7R 065G0402104 17 CAP CHIP 0402 100nF Z 16V Y5V 065G0402104 17 CAP CHIP 0402 100nF Z 16V Y5V 065G0402104 17 CAP CHIP 0402 100nF Z 16V Y5V...
  • Page 47 19”LCD View Sonic VX1940W-2 093G 64S503CMO BAV70W,SOT-323(SC-70),Pan Jit CMO 093G 64S503CMO BAV70W,SOT-323(SC-70),Pan Jit CMO 093G3004 3 SM340A 715G3053 B 2 MAIN PCB FR-4 90x60x1.0 DS 065G0402104 15 MLCC 0402 0.1UF K 16V X5R 065G0402104 15 MLCC 0402 0.1UF K 16V X5R 065G0402104 15 MLCC 0402 0.1UF K 16V X5R...
  • Page 48 19”LCD View Sonic VX1940W-2 T96MNBDKIWVSNNN Location Part No. Description Remark CBPC8NBVWQ2 CONVERSION BOARD 089G176C 15N15 FFC Cable 15P 127mm / 32-D019529 750GLM90KA232C000Q PANEL A190Z1 VSC CMO/SJ0Z101D01 089G1738SAA600 D-SUB CABLE 1800mm 32-D002132 N-USA POWER CORD/(TPV 共用)32-D022438 089G402A18N IS 089G176C 55N00 FFC Cable 55P 135MM / 32-D019103...
  • Page 49 19”LCD View Sonic VX1940W-2 089G1748CAA AC SIGNAL CABLE DVI COMLINK 089G 728CAA DB D-SUB CABLE N40G000296820A ZA POP LABEL N52G 1VSC005 mylar 73-d0157632 Conductive Tape 277mm *15mm *0.06mm (单 导） N52G 1VSC010 N40G000296823A HG LABEL- 77-D022377 N-USA 089G402A18N YH POWER CORD(32-D022438)(美規)
  • Page 50 19”LCD View Sonic VX1940W-2 Conductive Tape 75mm *45mm *0.08mm (单 导） 052G 1211527 N45G 88606012 DS pe bag for base N34G0190 ZK 1B CM BEZEL 40-D019513 N34G0189 ZNA1B CM DECORATION 40-D019530 N33G0035 1P CM LENS 40-D018272 N33G0034 ZN 1B KEYPAD 40-D018263...

  • Page 51: View Sonic Vx1940W

    19”LCD View Sonic VX1940W-2 061G0402101 RST CHIPR 100 OHM +-5% 1/16W 061G0402101 RST CHIPR 100 OHM +-5% 1/16W 061G0402101 RST CHIPR 100 OHM +-5% 1/16W 061G0402101 RST CHIPR 100 OHM +-5% 1/16W 061G0402101 RST CHIPR 100 OHM +-5% 1/16W 061G0402101...
  • Page 52 19”LCD View Sonic VX1940W-2 061G0402330 RST CHIPR 33 OHM +-5% 1/16W 061G0402330 RST CHIPR 33 OHM +-5% 1/16W 061G0402330 RST CHIPR 33 OHM +-5% 1/16W 061G0402330 RST CHIPR 33 OHM +-5% 1/16W 061G0402330 RST CHIPR 33 OHM +-5% 1/16W 061G0402330...
  • Page 53 19”LCD View Sonic VX1940W-2 065G0402102 12 CAP CHIP 0402 1nF K 16V X7R 065G0402104 17 CAP CHIP 0402 100nF Z 16V Y5V 065G0402104 17 CAP CHIP 0402 100nF Z 16V Y5V 065G0402104 17 CAP CHIP 0402 100nF Z 16V Y5V...
  • Page 54 19”LCD View Sonic VX1940W-2 093G 64S503CMO BAV70W,SOT-323(SC-70),Pan Jit CMO 093G3004 3 SM340A 715G3053 B 2 MAIN PCB FR-4 90x60x1.0 DS 065G0402104 15 MLCC 0402 0.1UF K 16V X5R 065G0402104 15 MLCC 0402 0.1UF K 16V X5R 065G0402104 15 MLCC 0402 0.1UF K 16V X5R 065G0402104 15 MLCC 0402 0.1UF K 16V X5R...

  • Page 55: Different Parts List

    19”LCD View Sonic VX1940W-2 11. Different Parts List Diversity of T96MNBDKIWVSNNN compared with T96MNBDKIWVSNND Location Part No. Description Remark POWER CORD/(TPV 共用)32-D022438 N-USA 089G402A18N IS N-USA 089G402A18N YH POWER CORD(32-D022438)(美規) N40G 19N96842A SAFETY LABEL N33G0035 1P CM LENS 40-D018272 - 57 –...

Table of Contents