ViewSonic E70-8 Manuel de service

Model No. VCDTS22355-317” Digital Controlled Color MonitorService ManualViewSonic E70-11ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA

Do the following to adjust the screen image:1To display the Main Menu, press button [1].2To select a control you want to adjust, press the arrow butto

Main Menu ControlsAdjust the menu items shown below by using the up and down buttons.Control Explanation Contrastadjusts the difference between the im

Degaussremoves the build-up of magnetic fields that can cause irregular colors to appear around the edges of screen images. There are two ways to dega

4-1 MICRO CONTROLLER CIRCUIT MICRO Controller The IC101 contains a 8031 8-bit CPU core, 60K bytes of RAM, 16K bytes of ROM,14 channel 8 bit PWM D/A

Pin6 (BDRV) is floating Pin8 (HDRV) is floating Pin12, 13 ( VOUT 12, 13) are floating Vertical Oscillator The vertical free –running frequency is

5-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS 1. Approximately 30 minutes should be allowed for warm up before proceeding. 2. Adjustments should be und

H-SIZE G-GAIN V-CENTER B-GAIN V-SIZE R-BIAS ZOOM G-BIAS PINCUSHION R-BIAS TRAPEZOID 9300 COLOR TEMPERATURE PIN-BALANCE 6500 COLOR TEMPERAT

C. The adjustment of 6500°K white Balance, May follow step A ~ B , with the x=313 ± 10, y=329 ± 10.Y=145±10cd/m² D. Thr adjustment of 5000°K white

6-1 NO RASTER, CRT RELATIVE CIRCUIT PROBLEMS REFER ITEM S.M.P.S.BRIGHTNESS SET TO MAX. CHECK CRT G1 VOLTAGENG NG NG NG NG OK OK OK OK OK CHECK THE

1.ABNORMAL VIDEO LEVEL ON SCREEN OK NG OK NG NG OK OK CHECK THE VOLTAGE OF IC801 CHECK THE SIGNAL INPUT OF ABOUT 0.7Vpp CHECK THE VIDEO OUTPUT OF

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6-2 ABNORMAL DISPLAY 1.NO SIGNAL ON SCREEN CHECK FBT RELATIVE LESS THAN 400VOK NG NG OK OK NG OK NG CHECK THE OUTPUT VOLTAGE CHECK THE B+ VOLTAGE

6-3 NO BLANKING NG OK CHECK THE CIRCUIT OF CHECK THE RELATIVE CHECK G1 RELATIVE CHECK R859 ON VIDEO FBT PIN 4 ON MAIN OF Q601, Q707 6-4 HOR./OSC

6-5 ABNORMAL HORIZONTAL DEFLECTION 1. ABNORMAL HORIZONTAL WIDTH OF VIDEO NG OK CHECK THE RELATIVE CHECK THE CIRCUIT OF READJUST H-WIDTH OF Q404, Q

6-6 ABNORMAL VERTICAL SCANNING 1. ABNORMAL VERTICAL SIZE OK NG OK NG READJUST V- SIZE FUNCTION RELATIVE CIRCUIT CHECK VERT. OSC RELATIVE CIRCUIT

6-9 POWER SUPPLY TROUBLE SHOOTING CHART BEFORE CHECK SW.REG. PLEASE REFER TO THE POWER SUPPLY BLOCK DIAGRAM POWER SUPPLY OUTPUT: (A) VARIABLE OUTPU

Item ViewSonic P/N Reference P/N Description Location Universal number# Q'ty Lead time1 B-MB-0201-2735 CMS773Z1NVOMain Bord (with component)1602

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#1#N/A 1A5035T47 SCREW FOR CRT42M-MS-0808-7415 5A388 RUBBER WASHER43M-MS

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#60#N/A 52A60166501261#N/A 52A60171062M-MS-0808-7413 55A1005963M-MS-0808

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#120#N/A 64A178J7541A 0.75U 100VC706 1121#N/A 65A1K4721A6921 4700PF 1KVC

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#180#N/A 81A102GGP LEDLED2 1LED181M-MS-0808-7419 84A3310 FUSE CLIPF901 2

TABLE OF CONTENTS 2. Specification3. Front Panel Function Control Description4. Circuit Description6. Trouble Shooting Flow Chart9. Block Diagram10.

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#240#N/A 61A58301WT NTCR 300OHM +-5%3800K TNR615 1241#N/A 61A17139352T C

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#300#N/AR127 1301#N/A 61A21039352T MFR 39K OHM +- 1% 1/6WR490 1302#N/A 6

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#360#N/A 61A175L47352T CFR 47K OHM +-5% 1/2WR925 1361E-R-0405-2382 61A17

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#420#N/AC429 1421#N/AC445 1422#N/AC470 1423#N/A 65A4501043T 0.1UF 50VC10

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#480E-D-0403-2146 93A10403Z52T F.R.D TBA157 1A/400VD741 1TBA157 481E-D-0

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#540#N/AC837 1541#N/AC838 1542#N/AC860 1543#N/AC836 0544#N/AC837 0545#N/

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#600M-MS-0808-7423 87A5016 RECEPTACLES1601M-WR-0828-5992 95A80022C WIRE

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#660#N/AR472 1661#N/AR476 1662#N/AR857 1663#N/AR858 1664#N/AR859 1665E-R

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#720#N/AC867 0721#N/AC705 0722#N/AC867 0723#N/AC950 1724#N/AC873 1725E-C

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#780#N/AD803 1781#N/AD804 1782#N/AD805 1783#N/AD806 1784#N/AD911 1785#N/

WARNIN G! This service information is designed for experience repair technicians only and is not designed for use by the general public. It does

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#840#N/AJ041 1841#N/AJ043 1842#N/AJ044 1843#N/AJ046 1844#N/AJ047 1845#N/

ItemViewSonic P/N Reference P/N Description LocationQ'ty Universal number#900#N/AJ109 1901#N/AJ110 1902#N/AJ111 1903#N/AJ112 1904#N/AJ113 1905#N/

8. Exploded Diagram And Spare Parts List 39ViewSonic Corporation Confidential - Do Not Copy E70-11

Item ViewSonic P/N Part number Description Q'ty1 M-MS-0808-9744 33A4112-F0-A KEY PAD 1PCS2 PL-NB-0707-1080 33A4114-F0-A POWER KNOB 1PCS3 C-FP-030

SIGNALCABLE5*%IC 801LM1246PRE.AMP.IC 802LM2470 O/PCRTFunction KEYIC 101NT68F63CPUHVIC801RGBIC 401TDA48419HUW+RU26&Q402, T401Hor.DriverFocusHVQ4

DegaussesC.K.TRectifiedSmoothed&VINT901PowerTransformer OutputRectified &Smoothed14VQ909Q918Q907Q908Q9216.3VRy901Start C.K.TQ904,Q906,Q911,

CS032NC18DSDA25NC10KEY B37RESET4ISDA12NC28CS131DSCL26LED R2ABL29DEG14BRI40OFF38CS230MUTE B+22HSYNC41VDD5WP16HSYNCO34GND7NC11V/D17LED G1OSCI9HL23NC27V3

ok, full pagewidthVERTICALSYNC INPUTAND POLARITYCORRECTIONVERTICALSYNCINTEGRATORVERTICALOSCILLATORAND AGCEW-OUTPUTHORIZONTAL PINCUSHIONHORIZONTAL CORN

Schematic Diagram Connection DiagramNote: Tab is at GND.FIGURE 2. Top ViewLM2470IC802 LM2470TAIC801 LM1246 Block Diagram 45ViewSonic Corporation Con

IC901 3842VCCGNDO/PCt/RtIsCOMP.F.BVref 82134657U.V.L.O.36V1V1/2 VrefOSCILLATORLATCHPWMSRCOMPC.S.1/3AMPERRLOGLCRESETSET/Vref5VBIASINTERNAL7DIFFERENTIAL

5-4 Move the resistor connection to each exposed metallic part and measure the voltage. 5-5 Reverse the polarity of the AC plug in the AC outlet and

5544332211D DC CB BA ACS0B+DEG.5V12VH/VB+CS1HBLKSYNC-5VCS1DEG.12VMUTE B+5VH-OUT-VOUT95V+VOUTJUMPERVDFVDFSYNC+HBLKFROMFBT57VCS214VP773Z-1(VSC)14VV-OUT+

Video Board Layout 11. PCB Layout Diagrams 48ViewSonic Corporation Confidential - Do Not Copy E70

*Readers Response*Dear Readers:Thank you in advance for your feedback on our Service Manual,which allows continuous improvementof our products. We wo

1. CRT : 43.2CM(17") 90 Deflection, 29mm Neck, 0.27mm Dot Pitch, Non-Glare Screen 2. Viewable image Size: 40.6CM (16") diagonal 3. D

10. Video Bandwidth: 120 MHz 11. Power Source: Switching Mode Power Supply AC 100 ~240V, 50/60Hz Universal Type 12. Operating Temperature: 0°C

OPERATING INSTRUCTIONS This procedure gives you instructions for installing and using the Color display. 1. Position the display on the desired oper

Adjusting the Screen ImageUse the buttons on the front control panel to display and adjust the OnView®controls which display on the screen. The OnView