Power Management; Self Diagnosis Function; Timing Specification - Dell P792 Service Manual

The power saving mode complies with the VESA Display Power Management Signaling standard. Each state of power management shall be activated
by the host computer terminating the appropriate sync signals. Blanking the video must precede termination of the sync signals. The elapsed time
counter shall also be controlled by the host computer. Reactivation of the monitor shall be accomplished from the host computer by re-establishing the
normal sync signal.
Power consumption
mode
1 Normal operation
2 Active-off (3rd mode)
3 Power-off
* In this mode, the signal will appear in one of three ways: The Horizontal Sync Signal alone off, the Vertical Sync Signal
alone off, or both signals off.
When a failure occurs, the STANDBY/TIMER lamp will fl ash a set number of times to indicate the possible cause of the problem. If there is more than
one error, the lamp will identify the fi rst of the problem areas.
Status
1
Failure 1
2 Failure 2
3
Failure 3
4
Aging/Self Test
1
MODE
Resolution (H x V) 640x480
Dot Clock (MHz) 25.175
HORIZONTAL
Hor. Freq. (kHz) 31.469
H-Total 31.778
H-Blanking 6.356
H-Front Porch 0.636
H-Sync. 3.813
H-Back Porch 1.907
H-Active 25.422
(µsec)
VERTICAL
Ver. Freq. (Hz) 59.940
V-Total 525
V-Blanking 45
V-Front Porch 10
V-Sync. 2
V-Back Porch 33
V-Active 480
(lines)
SYNC.
Int (G) NO
Ext (H/V)/Polarity YES -/-
Ext (C/S)/Polarity NO
Int/Non Int NON INT NON INT NON INT NON INT

POWER MANAGEMENT

Screen Horizontal
(video) sync signal sync signal consumption
active yes
blank no*
-- --

SELF DIAGNOSIS FUNCTION

Area of Failure
HV or +B
H Stop, V Stop or S Correction FET Failure
ABL

TIMING SPECIFICATION

2 3 4
640x480 720x400 800x600 1024x768 1024x768 1280x1024 640x480
36.000 28.321 56.250
43.269 31.468 53.674
23.111 31.779 18.631
5.333 6.356 4.409
1.556 0.636 0.569
1.556 3.178 1.138
2.222 2.542 2.702
17.778 25.423 14.222
85.008 70.084 85.061
509 449 631
29 49 31
1 13 1
3 2 3
25 34 27
480 400 600
NO NO NO
YES -/- YES -/+ YES +/+
NO NO NO
Vertical Power
yes < 120 W
no* < 3 W
-- 0 W (approx)
Amber (0.5 second) / Off (0.5 second)
Amber (1.5 second) / Off (0.5 second)
Amber (0.5 second) / Off (1.5 second)
Amber (0.5 second) / Off (0.5 second)/
Green (0.5 second) / Off (0.5 second)
Primary
Mode
5 6 7
78.750 94.500 157.500
60.023 68.677 91.146
16.660 14.561 10.971
3.657 3.725 2.844
0.203 0.508 0.406
1.219 1.016 1.016
2.235 2.201 1.422
13.003 10.836 8.127
75.029 84.997 85.024
800 808 1072
32 40
1 1
3 3
28 36
768 768 1024
NO NO NO
YES +/+ YES +/+ YES +/+
NO NO NO
NON INT NON INT NON INT NON INT NON INT
— 4 —
Recovery time Indicator
-- Green
Approx. 10 sec. Amber
-- Off
LED Indication
8 9
800x 600 1280x1024 1600x1200
31.500 49.500 135.000
37.500 46.875
26.667 21.333
6.349 5.172
0.508 0.323
2.032 1.616
3.810 3.232
20.317 16.162
75.000 75.000
500 625
48 20 25
1 1 1
3 3 3
44 16 21
480 600
NO NO
YES -/- YES +/+ YES +/+
NO NO
NON INT
P792
10 11
202.500
79.976 93.750
12.504 10.667
3.022 2.765
0.119 0.316
1.067 0.948
1.837 1.501
9.481 7.901
75.025 75.000
1066 1250
42 50
1 1
3 3
38 46
1024 1200
NO NO
YES +/+
NO NO
NON INT