Service Manual
Page 46
... description 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 4.5.6 Parallel... 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 -
... description 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 4.5.6 Parallel... 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 -
Service Manual
Page 49
... detector circuit is used to compare the line flyback pulse at proper duty cycle and maintains the phase between raster and picture. 4.5.2 Horizontal Driver Stage The horizontal drive pulse from Q415 collector pulse via R446, R446 and C424. The PLL2 circuit is provided by the regulated 15V-voltage... Q412turn off. One input is from IC301 pin7 output positive polarity sync to the base of Horizontal output Transistor Q415. The output of driver transformer T401 is connected from signal cable to IC301(MCU) pin8 input and from the output of VCO (which is built inside the IC...
... detector circuit is used to compare the line flyback pulse at proper duty cycle and maintains the phase between raster and picture. 4.5.2 Horizontal Driver Stage The horizontal drive pulse from Q415 collector pulse via R446, R446 and C424. The PLL2 circuit is provided by the regulated 15V-voltage... Q412turn off. One input is from IC301 pin7 output positive polarity sync to the base of Horizontal output Transistor Q415. The output of driver transformer T401 is connected from signal cable to IC301(MCU) pin8 input and from the output of VCO (which is built inside the IC...
Service Manual
Page 52
Pin5 for H-sync input, pin10 for red, green, blue channel. B. Do Not Copy ViewSonic Corporation 50 Confidential - IC901 pin6/pin15 can control IC901 pin7 amplitude/phase by IC301 pin32/pin31. 4.5.10 TILT Tilt CKT is output from P602 pin9 (... the IC901 pin7 (M52723ASP) Sync trigger by the pin17 of CRT 4.6.2 4.6.3 On Screen Display (OSD)(IC603) IC603 (MTV021N-25) is an integrated high voltage CRT driver circuit designed to FBT pin13. The clamping pulse comes from Q904 via T405 pin7 coupling to the video preamplifier IC601 (M52743BSP) (pin2 blue, pin6 green...
Pin5 for H-sync input, pin10 for red, green, blue channel. B. Do Not Copy ViewSonic Corporation 50 Confidential - IC901 pin6/pin15 can control IC901 pin7 amplitude/phase by IC301 pin32/pin31. 4.5.10 TILT Tilt CKT is output from P602 pin9 (... the IC901 pin7 (M52723ASP) Sync trigger by the pin17 of CRT 4.6.2 4.6.3 On Screen Display (OSD)(IC603) IC603 (MTV021N-25) is an integrated high voltage CRT driver circuit designed to FBT pin13. The clamping pulse comes from Q904 via T405 pin7 coupling to the video preamplifier IC601 (M52743BSP) (pin2 blue, pin6 green...