Iiyama Vision Master Pro 450, Service Manual

Page: 28 / 58

CS5
(Pin 59)
LOW
LOW
LOW
HIGH
LOW
LOW
LOW
HIGH
LOW
HIGH
HIGH
HIGH
CS1
(Pin 55)
LOW
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
CS2
(Pin 56)
LOW
HIGH
LOW
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
CS3
(Pin 57)
LOW
LOW
LOW
HIGH
LOW
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
CS4
(Pin 58)
LOW
LOW
LOW
LOW
LOW
HIGH
LOW
LOW
HIGH
HIGH
HIGH
HIGH
- 25 -
IC301 output pin
CS6
(Pin 60)
HIGH
HIGH
HIGH
HIGH
HIGH
LOW
LOW
LOW
HIGH
LOW
LOW
HIGH
DRIVE
(Pin 3)
LOW
LOW
LOW
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
fH (kHz)
23.5 - 28.0
28.1 - 34.0
34.1 - 41.0
41.1 - 45.0
45.1 - 49.0
49.1 - 59.0
59.1 - 66.0
66.1 - 73.0
73.1 - 84.0
84.1 - 88.5
88.6 - 97.0
97.1 - 115.0
0V
2V
5V
Pin 13 of IC350
0V
3V
5V
Pin 12 of IC350
4-13. DYNAMIC BEAM FOCUS circuit
The H-parabolic wave from pin 13 of IC350 is amplified by 18 times by Q518 and Q519 respectively. The amplified
parabolic wave is pressured up to 500vp-p by T503 and combined with V-parabolic wave and then added to pin 13
of T501.
V-parabolic wave from pin 12 of IC350 is amplified by Q520 and combined with H-parabolic wave.
4-14. SWITCHING SIGNAL circuit (CS SWITCHING POINTS)
Each switching point performs horizontal linear and distortion correction as follows:
H-LIN1
(Pin 2)
LOW
LOW
LOW
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
H-LIN2
(Pin 1)
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
LOW
LOW
LOW
justmanuals.com justmanuals.com