Acer AC 711 Service Manual

Also see for AC 711: User manual Quick start guide

Contents

Acer AC 711 Service Manual Manual pdf 11 page image

113. INTRODUCTION:C708 is a 17” multisync color monitor. The horizontal frequency range is from 30khz to70khz, and the refresh rate is from 50hz to 160hz. The circuit includes four major parts, thepower supply circuit, the deflection circuit, the video circuit and the digital control circuit. isthe function block diagram.A. POWER SUPPLYTransfer AC source to DC source that supply all the circuit power. It includes:(1) +13.5V: For horizontal and vertical deflection circuit.(2) –11.5V: For vertical deflection circuit.(3) +7.2V: For CRT heater, parts of video pre-amp circuit.(4) +53V: For B+ Boost circuit.(5) +80V: For video circuit(6) 9.2V: for MIRCO- PFig 2 is the function block diagram of power CKT.B. DEFLECTION:Produce YOKE deflection current of horizontal and vertical, CRT H.V and bias that makesscreen raster.C. VIDEO:amplify the video signal and add the signal to the cathode of CRT to produce video on thescreen.D. DIGITAL CONTROLLOR:With the EEPROM and PROGRAM, the micro-processor (u-P) control all the pictureperformance.From the key control, the user can change the H-size, V-size, V-center, H-phase.