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1.9.5
AUTO-SIZE function
AUTO-SIZE functions to calculate the required width and position of screen in user mode
based on the position of picture signal and the phase of AFC Feed Back and to automatically
adjust them. "AUTO SIZE ADJUST" is selected in OSD, and when (+) button is pressed, AUTO
SIZE ADJUST process is operated.
<AUTO-SIZE circuit action>
AUTO-SIZE detects the phase data of RGB OR signal, which is output from Pre-AMP IC211 to
OSD-IC IC212, based on H-OSD and V-S signals input to OSD-IC IC212. Then, it sends the
data to microcomputer IC101 via I2C bus so as to be calculated and processed.
The details are as follows.
RGB OR signal output from pin 1 of Pre-AMP IC211 is input to pin 19 of OSD-IC IC212. (C point)
H-OSD signal output from pin 12 of inverter IC8A1 on PWB-MAIN is input to pin 5 (B point) of
OSD-IC IC212 via connector J212 on PWB-VIDEO from connector J103, and the signal (A
point) with delay of 700ns by filters of R2D8 and C2D7 is input to pin 9 of OSD-IC IC212.
V-S signal, like the above, is output from pin 6 of inverter IC8A1 on PWB-MAIN, and input to
pin 18 of OSD-IC IC212 via connector J212 on PWB-VIDEO from connector J103, and the
signal with filters R2D6 and C2D6 is input to pin 16 of OSD-IC IC212. (D point)
OSD-IC IC212 detects the signal with this delay of 700ns (A and D points) and the position
data (a to e mentioned below) of RGB OR signal (C point), and sends them to microcomputer
IC101. The microcomputer IC101 calculates and processes the data to automatically adjust to
ensure the appropriate width and position of screen.
a: Drgbsta (AFC front edge + 700ns to Front edge of Picture)
b: Drgbend (AFC front edge + 700ns to Back edge of Picture)
c: Dvrgbsta ( V_BLK front edge + 700ns to Front edge of Picture)
d: Dvrgbend (V_BLK front edge + 700ns to Back edge of Picture)
e: Dvsline (Number of vertical lines)
Figure 29 AUTO SIZE circuit
Summary of Contents for MultiSync FP1355 FP1355 FP1355
Page 23: ...1 17 Q502 Q502 Damper diode Current waveform fh 106k ...
Page 25: ...1 19 Q502 Q502 Damper diode Current waveform Q502 Ic Q502 Vce ...
Page 58: ...1 52 Figure 25 IC211 MC13289ASP block diagram ...
Page 63: ...1 57 Figure 30 IC212 XC3824P2 block diagram ...
Page 65: ...1 59 1 11 Wave form of main circuit voltage ...
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Page 120: ...MultiSync FP1355 User s Manual ...
Page 144: ... VSP C0464 REVISE 2 ...
Page 166: ...Fig 2 BEZEL LOGO VSP C0464 COLOR OF LETTERING Kingfisher Blue 6704 11 5 24 5 66 ...
Page 169: ...VSP C0464 Fig 5 1 PRINTING SPECIFICATION OF CARTON BOX North America ...
Page 170: ...VSP C0464 Fig 5 2 PRINTING SPECIFICATION OF CARTON BOX Europe ...
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