ViewSonic E70F Service Manual - Page 14

ViewSonic E70F - 17" CRT Display Manual

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14.3 BRIGHTNESS RANGE 14.3.1 NO VIDEO INPUT, SET CONTRAST 0%, BRIGHTNESS 100% 14.3.2 RASTER LIGHT O/P 0.3 -0.8FL. 14.4 LUMINANCE LINEARITY 14.4.1 APPLY SIGNAL B MODE: VGA480. 14.4.2 SET BRIGHTNESS TO THRESOLD OF RASTER EXTINCTION. 14.4.3 ALL STAIRSTEPS MUST BE DISCERNIBLE FROM EACH OTHER FOR ANY CONTRAST SETTING WHERE THE BRIGHTEST BAR IS VARIED BETWEEN 5 TO 20 FL BY ADJUST CONTRAST CONTROL. 14.5 TEMPERATURE STABILITY 14.5.1 APPLY SIGNAL A MODE: VGA480. 14.5.2 SET BRIGHTNESS TO THRESHOLD OF RASTER EXTINCTION AND CONTRAST TO PRODUCE 25FL AT 25oC. 14.5.3 LUMINANCE MUST NOT CHANGE MORE THAN 5FL OVER A TEMPERATURE RANGE OF 10oC TO 40oC. 14.6 BANDWIDTH RESOLUTION 14.6.1 APPLY SIGNAL D MODE: 69KHZ / 85HZ. 14.6.2 OBSERVE THAT VERTICAL LINES AND HORIZONTAL LINES WHILE SET BRIGHTNESS CONTROL AT DETECT POSITION AND CONTRAST CONTROL AT ANY SETTING. 14.7 VIDEO RISE TIME / FALL TIME. 14.7.1 INPUT FULL WHITE PATTERN AT 69KHz/85Hz 14.7.2 MEASURE VIDEO RISE & FALL TIMES AT EACH CATHODE WITH A LOW CAPACITANCE 100X PROBE AND 150MHZ MINIMUM BW OSCILLOSCOPE. 14.7.3 ADJUST CONTRAST TO CATHODE OUTPUT 40V. 14.7.4 RISE AND FALL TIMES MUST BE AS FOLLOWS: 10% TO 90%

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14.3 BRIGHTNESS RANGE
14.3.1 NO VIDEO INPUT, SET CONTRAST 0%, BRIGHTNESS 100%
14.3.2 RASTER LIGHT O/P 0.3 –0.8FL.
14.4 LUMINANCE LINEARITY
14.4.1
APPLY SIGNAL B MODE: VGA480.
14.4.2 SET BRIGHTNESS TO THRESOLD OF RASTER EXTINCTION.
14.4.3 ALL STAIRSTEPS MUST BE DISCERNIBLE FROM EACH OTHER FOR ANY CONTRAST SETTING
WHERE THE BRIGHTEST BAR IS VARIED BETWEEN 5 TO 20 FL BY ADJUST CONTRAST CONTROL.
14.
5
TEMPERATURE STABILITY
14.5.1 APPLY SIGNAL A MODE: VGA480.
14.5.2 SET BRIGHTNESS TO THRESHOLD OF RASTER EXTINCTION AND CONTRAST TO PRODUCE 25FL AT
25
o
C.
14.5.3 LUMINANCE MUST NOT CHANGE MORE THAN 5FL OVER A TEMPERATURE RANGE
OF 10
o
C TO 40
o
C.
14.6 BANDWIDTH RESOLUTION
14.6.1 APPLY SIGNAL D MODE: 69KHZ / 85HZ.
14.6.2 OBSERVE THAT VERTICAL LINES AND HORIZONTAL LINES WHILE SET BRIGHTNESS CONTROL AT
DETECT POSITION AND CONTRAST CONTROL AT ANY SETTING.
14.7 VIDEO RISE TIME / FALL TIME.
14.7.1 INPUT FULL WHITE PATTERN AT
69KHz/85Hz
14.7.2 MEASURE VIDEO RISE & FALL TIMES AT EACH CATHODE WITH A LOW CAPACITANCE 100X PROBE
AND 150MHZ MINIMUM BW OSCILLOSCOPE.
14.7.3 ADJUST CONTRAST TO CATHODE OUTPUT 40V.
14.7.4 RISE AND FALL TIMES MUST BE AS FOLLOWS: 10% TO 90% <
8.5 ns.
15.
FACTORY PRESET:
15.1 BURN-IN MODE CANCELLATION:
TO PUSH “
” AND “
” KEY FIRST, AND THEN PUSH POWER SWITCH WITHOUT RELEASE “
” AND “
” KEY
AND SYNC INPUT IN ORDER TO LET MONITOR POWER ON, MEANWHILE WITH RELEASEING “
” AND “
”KEY,
BURN-IN MODE WILL BE CANCELLED.
15.2 CONTRAST: 100
15.3 BRIGHTNESS: 50
15.4 COLOR: 9300
o
K
15.5 POWER SWITCH: POWER OFF
16. POWER MANAGEMENT TESTS.
16.1 POWER CONSUMPTIONS TEST TABLE:
SYNC PULSE
MODE
HORIZONTAL
VERTICAL
VIDEO
POWER
LED
RECOVERY TIME
(SEC)
NORMAL ON
YES
YES
YES
<75w
GREEN
-
NO
YES
POWER SAVING
YES
NO
POWER SAVING
NO
NO
BLANK
<5w
AMBER
<10
17. AUTO SIZING FUNCTION
17.1 INPUT ALL USER MODE AND CROSS PATTERN
17.2 PRESS THE AUTO SIZING KEY , THE PICTURE WILL BE MUTE AROUND 2~4 sec , THEN PICTURE WILL BE IN THE
CENTER OF THE MONITOR AND PICTURE CAN’T OVER THE FRONT BEZEL.
17.3 The PICTURE SIZE ARE AS FOLLOWING :
H-SIZE : 310 +
5 mm
V-SIZE : 230 +
5 mm
11
ViewSonic Corporation
Co
nfidential - Do Not Copy
70f+SB-3
E