Service Manual
Page 46
...4.1 Power supply ( switching power supply ) 4.2 Power saving 4.3 Micro-controller unit 4.4 Sync Processor 4.5 Deflection 4.5.1 Horizontal synchronization processing 4.5.2 Horizontal Driver stage 4.5.3 Horizontal scanning and high voltage power supply circuit 4.5.4 Buck converter and width control 4.5.5 The Pincushion /Trapezoid/Top Hook/Bottom Hook correction ... 4.6.2 On screen Display (OSD) 4.6.3 Auto Beam Limit CKT (A,B,L,CKT) 4.6.4 Brightness control 4.6.5 Blanking CKT 4.6.6 Contrast, gain & Bias control 4.6.7 DDC 1/2B ViewSonic Corporation 44 : Confidential - CIRCUIT DESCRIPTION 4.
...4.1 Power supply ( switching power supply ) 4.2 Power saving 4.3 Micro-controller unit 4.4 Sync Processor 4.5 Deflection 4.5.1 Horizontal synchronization processing 4.5.2 Horizontal Driver stage 4.5.3 Horizontal scanning and high voltage power supply circuit 4.5.4 Buck converter and width control 4.5.5 The Pincushion /Trapezoid/Top Hook/Bottom Hook correction ... 4.6.2 On screen Display (OSD) 4.6.3 Auto Beam Limit CKT (A,B,L,CKT) 4.6.4 Brightness control 4.6.5 Blanking CKT 4.6.6 Contrast, gain & Bias control 4.6.7 DDC 1/2B ViewSonic Corporation 44 : Confidential - CIRCUIT DESCRIPTION 4.
Service Manual
Page 49
... the line flyback pulse at pin HFLB with a properly selected time constant (C406, R407) is to eliminate the leakage flux of driver transformer T401 is connected from signal cable to IC301(MCU) pin8 input and from IC301 pin7 output positive polarity sync to IC401 pinl5...maintains the phase between raster and picture. 4.5.2 Horizontal Driver Stage The horizontal drive pulse from the output of driver MOSFET Q4125. One input is from pin8 of HDRV. is connector from signal cable to IC401 pin14. ViewSonic Corporation 47 Confidential - The control voltage formed through ...
... the line flyback pulse at pin HFLB with a properly selected time constant (C406, R407) is to eliminate the leakage flux of driver transformer T401 is connected from signal cable to IC301(MCU) pin8 input and from IC301 pin7 output positive polarity sync to IC401 pinl5...maintains the phase between raster and picture. 4.5.2 Horizontal Driver Stage The horizontal drive pulse from the output of driver MOSFET Q4125. One input is from pin8 of HDRV. is connector from signal cable to IC401 pin14. ViewSonic Corporation 47 Confidential - The control voltage formed through ...
Service Manual
Page 52
L. ViewSonic Corporation 50 Confidential - IC901 pin7 is taken from pin12 (B), pin15(G), pin14(R), pin13(B)connected to mixer circuit of CRT 4.6.2 4.6.3 On Screen Display (OSD)(IC603) IC603 (MTV021N-... rotation coil. IC901 pin6/pin15 can control IC901 pin7 amplitude/phase by IC301 pin32/pin31. 4.5.10 TILT Tilt CKT is an integrated high voltage CRT driver circuit designed to reduce the video preamplifier gain output. B. IC602 is operated a current of IC601 will be pulled down accordingly to drive R.G.B channel of IC601...
L. ViewSonic Corporation 50 Confidential - IC901 pin7 is taken from pin12 (B), pin15(G), pin14(R), pin13(B)connected to mixer circuit of CRT 4.6.2 4.6.3 On Screen Display (OSD)(IC603) IC603 (MTV021N-... rotation coil. IC901 pin6/pin15 can control IC901 pin7 amplitude/phase by IC301 pin32/pin31. 4.5.10 TILT Tilt CKT is an integrated high voltage CRT driver circuit designed to reduce the video preamplifier gain output. B. IC602 is operated a current of IC601 will be pulled down accordingly to drive R.G.B channel of IC601...