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5.5
Key Control.
IC301 pin27~pin30 function as DAC switch input to control OSD display function.
5.6
I
IC301 have two groups I
alignment, IC601 pre-AMP,
IC602 OSD IC function at pin 11,12 and pin13,14.
MCU
(NT68P62)
6.
WAVE FORM
Measuring Condition
Timing :
53.6KHz./85Hz. (except figure12)
Pattern :
Cross hatch pattern
100%
Contrast:
50%
Brightness:
AC input :
* 110V and 220V for testing on primary side of T101.
* Only 220V for testing on secondary side of T101.
(Because voltage at any point on secondary side of
T101 are same at any level of AC input usually.
Equipment : Oscilloscope 100 Mhz.
ViewSonic Corporation
2
C Bus.
2
C bus to control E
2
I
C BUS
2
I
C BUS
Output to signal cable
Pin12 = SDA , Pin15 = SCL
2
PROM, IC401 deflection IC, Auto
RGB
OSD
M35047
DEFLECTION
15
Confidential – Do Not Copy
DAC OUTPUT
PRE-AMP
LM1269
EEPROM
M24C08
24LC21
(OPTION)
E55-2
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