8-23
2) DC Control Circuit
CPU (IC801) controls three DAC ICs (IC532, IC751, IC711) through I
2
C BUS. Its analog outputs control
DAC output so that the analog voltage corresponds to the DC control data from CPU. IC802 is an EEPROM
which stores the DC control data for preset graphics standard timings.
Table 1 Summary of DAC control (IC532 on DEF PWB: CS0=CS1=CS2=0)
PORT
NAME
Summary
A01
COR_LT
Corner Landing Adjustment (LEFT TOP)
A02
ROT
Raster Rotation Adjustment
A03
EMF
Earth Magnetic Field Correction
A04
H_LIN
Horizontal Linearity Adjustment
A05
FV_L2
Vertical Filter Switch 2
A06
FV_L3
Vertical Filter Switch 3
A07
FV_L1
Vertical Filter Switch 1
A08
HS
Horizontal Size Adjustment
A09
HSM
Horizontal Maximum Size Adjustment
A10
COR_RB
Corner Landing Adjustment (RIGHT BOTTOM)
A11
COR_RT
Corner Landing Adjustment (RIGHT TOP)
A12
COR_LB
Corner Landing Adjustment (LEFT BOTTOM)
Table 2 Summary of DAC control (IC751 on VIDEO PWB: CS0=1 CS1=CS2=0)
PORT
NAME
Summary
A01
-
Not in use
A02
SUB_BIAS
CRT Cut off adjustment
A03
G_BIAS
CRT Cut off adjustment (Green)
A04
G_BRT
Brightness tracking adjustment (Green)
A05
B_BRT
Brightness tracking adjustment (Blue)
A06
B_BIAS
CRT Cut off adjustment (Blue)
A07
R_BIAS
CRT Cut off adjustment (Red)
A08
R_BRT
Brightness tracking adjustment (Red)
Table 3 Summary of DAC control (IC711 on VIDEO PWB)
PORT
NAME
Summary
D/A OUT1
SHARP1
Picture sharpness control 1
D/A OUT2
SHARP2
Picture sharpness control 2
D/A OUT3
SHARP3
Picture sharpness control 3
D/A OUT4
GAIN_ADJ
Video gain adjustment
Содержание FP1350 - MultiSync - 22" CRT Display
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Страница 165: ...8 17 Fig 3 1 HIGH VOLTAGE CIRCUIT AND PROTECTOR CIRCUIT AFC D FOCUS ...
Страница 240: ...for Human Potential ...