Medion B1770NSL Wartungshandbuch

17-inch Color MonitorB1770NSL/T (MD1772LB)Service ManualMEDION

Page 8MD 1772LB (B1770NSL/T)MEDION2-4 Display Power Management Signal (DPMS)Note: These power-saving states exceed the Environmental Protection Agency

Page 9MD 1772LB (B1770NSL/T)MEDION2-6-2 TCO 95 Version (Optional)The TCO 95 scheme is for international and environmental labelling of personal comput

Page 10MD 1772LB (B1770NSL/T)MEDION3 Control Location and Functions3-1 Front Panel3-2 Front Panel Keys Functions1. Function Key: Display the main men

Page 11MD 1772LB (B1770NSL/T)MEDION4 Operation TheoryThis is a fully digital controlled multi-sync color monitor that is compliant with DDC1/2B Plug a

Page 12MD 1772LB (B1770NSL/T)MEDION4-3-1Horizontal Section1. The oscillator is driven by the currents in R467 and R468. The minimum oscillator freque

Page 13MD 1772LB (B1770NSL/T)MEDION4-3-7 Contrast Section1. Contrast is controlled by I701 through I2C bus to I501 (TDA4886) directly.2. Beam current

Page 14MD 1772LB (B1770NSL/T)MEDION2. RegulationThe DC O/P voltage is proportional to the auxiliary voltage, so I801 pin 2 senses the feedback voltage

Page 15MD 1772LB (B1770NSL/T)MEDION5. Under override condition, “CHECK SIGNAL” will show up on the screen.4-6 OSD (On Screen Display) Circuit1. The I5

Page 16MD 1772LB (B1770NSL/T)MEDION5 Alignments and AdjustmentsThis section of the service manual explains how to make permanent adjustments to the mo

Page 17MD 1772LB (B1770NSL/T)MEDION5-2 Alignment Procedures5-2-1 High Voltage AdjustmentCONDITIONDisplay image : Crosshatch patternPROCEDUREConnect DC

Service Manual Versions and RevisionCopyrightCopyright 2000 LiteOn Technology Corp.All Rights ReservedThis manual may not, in whole or in part, becopi

Page 18MD 1772LB (B1770NSL/T)MEDION4-b. Adjust VR 402 to Y=29.5FL ± 1FL.4-c. Check the white balance at 5FL and 28FL.4-d. Repeat all the procedures in

Page 19MD 1772LB (B1770NSL/T)MEDIONFigure 4-1. Convergence Magnets on the CRT+8 7 6 5 4 3 210111CRTFRONTP91) Setup Bolt 2) Bow Magnet 3) Band 4) 2-Pol

Page 20MD 1772LB (B1770NSL/T)MEDION5-2-6 DegaussingDegaussing is required when poor color impurity appears on the screen. This monitor uses an automa

Page 21MD 1772LB (B1770NSL/T)MEDION6 Troubleshooting6-1 No RasterMeasurevoltage of B+ atT402 pin 3 onPWB-MAINNo RasterCheck voltage ofcathode, heater

Page 22MD 1772LB (B1770NSL/T)MEDION6-2 OSD AbnormalPut onI502Replace themNoCheck I502missing?Check R530,R532, R531OK?OSD AbnormalYesNoNoReplace itYesY

Page 23MD 1772LB (B1770NSL/T)MEDION6-3 Function Key AbnormalPut onI701, I703Replace X701NoCheck I701 andI703 missing?Power ON/OFF again andcheck X701,

Page 24MD 1772LB (B1770NSL/T)MEDION6-4 No Vertical Scan (Raster is one horizontal line)Ckeck or replaceI301.Replace I301YesCheck I301 voltage ofpin 3

Page 25MD 1772LB (B1770NSL/T)MEDION6-5 Out of Horizontal SynchronizationCkeck or replacethe signal cable orI701Check or replacethe signal cableor I70

Page 26MD 1772LB (B1770NSL/T)MEDION6-7 R.G.B. Video Amplifier AbnormalCheck or replace thesignal cable or I501YesCheckwaveform at I501 pin 16, 19and 2

Page 27MD 1772LB (B1770NSL/T)MEDION7 Recommended Parts ListNote: 1. The components identified by “ “ mark are critical for X-ray safety. Replace

Page 1MD 1772LB (B1770NSL/T)MEDIONTable of Contents1. Precautions...

Page 28MD 1772LB (B1770NSL/T)MEDIONNo. Location Part Number Description22 R804 6201100012 THERMISTOR 10 OHM 3A P=5 TKS23 R818 6220327852 FS OHM 0.27 1

Page 29MD 1772LB (B1770NSL/T)MEDION8 Block DiagramR911, R912, Q903,Q904, Q902, Q905VIDEO AMPR971, R972, Q963,Q964, Q962, Q965R941, R942, Q933,Q934, Q9

LITE-ON TECHNOLOGY CORP.5 F, No. 16, Sec. 4, Nanking E. Road, Taipei, TaiwanTel: 886-2-25706999 Fax: 886-2-25706888URL:// www.liteontc.com.twPrinted i

Page 2MD 1772LB (B1770NSL/T)MEDION1 PrecautionsFollow these safety and servicing precautions to prevent damage and to protect against potential hazard

Page 3MD 1772LB (B1770NSL/T)MEDION1-1-3 Product Safety NoticesMany electrical and mechanical parts in this chassis have special safety-related charact

Page 4MD 1772LB (B1770NSL/T)MEDIONd) Plug monitor power cord to the Hi Pot tester terminals.e) Turn on tester and watch the indicator or beeper.f) If

Page 5MD 1772LB (B1770NSL/T)MEDION2 Product Specifications2-1 SpecificationsNote: Above specifications are subject to change without prior notice.Pict

Page 6MD 1772LB (B1770NSL/T)MEDION2-2 Signal Cable Pin ConnectionsTable 2-1. Signal Cable Pin AssignmentPin Signal Pin Signal1 Red video 9** PC2 Green

Page 7MD 1772LB (B1770NSL/T)MEDION2-3 Timing ChartThis section describes the timings that the computer industry recognizes as standard for computer-ge