HP WF1907 Service Manual page 8

(Gm5766H).
Mode Resolution
1 640x480 (59.94Hz)
2 640x480 (72Hz)
3 640x480 (75Hz)
4 720x400 (70Hz)
5 800x600 (60Hz)
6 800x600 (72Hz)
7 800x600 (75Hz)
8 832x624 (74.55Hz)
9 1024x768 (60Hz)
10 1024x768 (70Hz)
11 1024x768 (75Hz)
12 1152x870 (75Hz)
13 1152x900 (76Hz)
14 1280x1024 (60Hz)
15 1280x1024 (75Hz)
Indication resolution
720 x 400
640 x 480
640 x 480
640 x 480
800 x 600
800 x 600
800 x 600
832 x 624
1024 x 768
1024 x 768
1024 x 768
1152 x 870
1152 x 900
1280 x 1024
1280 x 1024
3.8.3 Power ON sequence
When the POWER key switch is pressed, the POWER key switch signal is turned "H".
When this "H" potential is detected, the CPU begins to establish the respective power
Table 2 video mode
H-Freq (KHz)
31.469
37.861
37.5
31.469
37.879
48.077
46.875
49.722
48.363
56.476
60.023
68.68
71.71
63.981
79.976
Table 3 the Hsync, Vsync distinction
Distinction Hsync
30.5KHz≦fH≦32.5KHz
30.5KHz≦fH≦32.5KHz
36.9KHz≦fH≦38.9KHz
36.5KHz≦fH≦38.5KHz
36.9KHz≦fH≦38.9KHz
47.1KHz≦fH≦49.1KHz
45.9KHz≦fH≦47.9KHz
48.7KHz≦fH≦50.7KHz
47.4KHz≦fH≦49.4KHz
55.5KHz≦fH≦57.5KHz
59KHz≦fH≦61KHz
≦ ≦
67.7KHz fH 69.7KHz
70.7KHz fH 72.7KHz ≦ ≦
62.9KHz fH 64.9KHz ≦ ≦
79KHz fH 81KHz ≦ ≦
Page 7
Band Width (MHz)
25.175
31.5
31.5
28.322
40
50
49.5
57.284
65
75
78.75
100
105.561
108
135
Distinction Vsync
69Hz≦fV≦71Hz
59Hz≦fV≦61Hz
71.8Hz≦fV≦73.8Hz
74Hz≦fV≦76Hz
59.3Hz≦fV≦61.3Hz
71.2Hz≦fV≦73.2Hz
74Hz≦fV≦76Hz
73.5Hz≦fV≦75.5Hz
59Hz≦fV≦61Hz
69.1Hz≦fV≦70.1Hz
≦
74Hz≦fV 76Hz
≦ ≦
74Hz fV 76Hz
75Hz fV 77Hz ≦ ≦
59Hz fV 61Hz ≦ ≦
74Hz fV 76Hz ≦ ≦
Polarity
H V
- -
- -
- -
- +
+ +
+ +
+ +
+/- +/-
- -
- -
+ +
- -
- -
+ +
+ +
The fixed mode
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