Service Manuals, User Guides, Schematic Diagrams or docs for : Dell Monitor P791 Dell_P791
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10 Schematic Diagrams
10-1 Power Part Schematic Diagram
R662 Q663
1
C603
34
CN604
SW6
10-1 PG17**/PG19**/PG21**
10 Schematic Diagrams
CSE980B, CSE988B CSE780B, CSE788B 1 544 V (IC601, #1)
S5 S4 S3 S2 S1 S5 S4 S3 S2 S1
~33K H H H H H ~33K H H H L H
33~35K L H H L L 33~35K L H H L H
35~37K L H H L L 35~37K L H H L H
37~40K L L H H H 37~40K L L H H H CH1 P-P = 544 V CH1 RMS = 332.4 V
40~46K H H L L L 40~46K H H L L L
46~50K L H L H L 46~50K H L L H H
50~55K H L L H H 50~52K H L L H H
55~59K H L L H L 52~55K H L L H H
59~65K H L L L H 55~59K H L L H L
65~68K L L L H L 59~65K H L L L H
68~70K L L L H H 65~68K L L L H L
70~76K L L L H H 68~70K L L L H H
76~78K L L L L H 70~76K L L L H H
78~81K L L L H L 76~78K L L L L H
81~85K L L L L H 78~81K L L L L H
85~96K L L L L L 81~85K L L L L H
85~96K L L L L L
CSE9839, CSE9829 CSE7839, CSE7829
S5 S4 S3 S2 S1 S5 S4 S3 S2 S1
~33K H H H H H ~33K H H H H H
33~35K L H H L H 33~35K L H H L H
35~37K L H H L H 35~37K L H H L H
37~40K L L H H H 37~40K L L H H H
40~46K H H L L L 40~46K H H L L L
46~50K H L L H H 46~50K L H L H L
50~55K H L L H H 50~55K H L L H H
55~59K H L L H L 55~59K H L L H L
59~65K H L L L H 59~65K H L L L H
65~68K L L L H L 65~68K L L L H L
68~70K L L L H H 68~70K L L L H H
70~76K L L L H H 70~76K L L L H H
76~78K L L L L H 76~78K L L L L H
78~81K L L L H L 78~81K L L L L H
81~85K L L L L H 81~85K L L L L H
85~96K L L L L L 85~96K L L L L L
PG17**/PG19**/PG21** 10-2
10 Schematic Diagrams
10-2 Micom Part Schematic Diagram
15
16
10-3 PG17**/PG19**/PG21**
10 Schematic Diagrams
Table 10-1. IC201 (ST72E75) 15 3.42 V (IC201, #33) 16 3.16 V (IC201, #32)
pin # MODES MODES
pin #
31 kHz 68 kHz 91 kHz 31 kHz 68 kHz 91 kHz
1 5.05 5.05 5.05 22 5 5.03 5.03
2 0 0 0 23 GND GND GND
3 2.18 2.18 2.18 24 4.06 2.75 3.77
CH1 P-P = 3.42 V CH1 RMS = 2.500 V CH1 P-P = 3.16 V CH1 RMS = 2.560 V
4 3.84 4.12 4.23 25 5 5 5
5 NC NC NC 26 0 0 0
6 2.32 2.32 2.31 27 5 5 5
7 0 0 0 28 5 5 5
8 NC NC NC 29 5 5 5
9 GND GND GND 30 5 5 5
10 5.05 5.05 5.04 31 0 0 0
11 5 5 5 32 2.34 2.33 2.28
12 5 5 5 33 2.22 2.22 2.24
13 5 5 5 34 0 0 0
14 5 5 5 35 12 0 0
15 5 0 5 36 12 0 0
16 5 5 5 37 12 12 0
17 NC NC NC 38 12 12 0
18 4.73 4.62 4.63 39 12 0 0
19 NC NC NC 40 5 5 5
20 0 0 0 41 GND GND GND
21 0.6 0.36 0.46 42 2.05 2.62 2.62
Unit: Vrms
Table 10-2. IC251 (SAM9222G)
MODES MODES
pin #
pin #
31 kHz 68 kHz 91 kHz 31 kHz 68 kHz 91 kHz
1 0.61 0.36 0.46 17 GND GND GND
2 0 0 0 18 5.56 5.54 5.54
3 0.17 0.16 0.17 19 GND GND GND
4 4.83 4.82 4.82 20 5.46 5.24 5.24
5 3.28 2.69 2.31 21 8.15 8.16 8.16
6 6.41 6.41 6.4 22 3.56 3.56 3.56
7 4.01 4.0 3.99 23 3.56 3.56 3.56
8 1.55 3.39 4.5 24 3.16 3.05 3.05
9 1.55 3.39 4.5 25 2.02 2.01 2.01
10 3.37 3.3 3.29 26 5.06 5.11 5.38
11 GND GND GND 27 GND GND GND
12 0 0 0 28 3.63 2.49 3.69
13 8.05 8.04 8.04 29 12.02 12.02 12.02
14 8.09 8.03 8.0 30 5.03 5.03 5.03
15 2.74 2.83 2.78 31 5.03 5.03 5.03
16 3.27 3.26 3.24 32 5.04 5.03 5.03
Unit: Vrms
PG17**/PG19**/PG21** 10-4
10 Schematic Diagrams
10-3 H/V Process Part Schematic Diagram
8
Hout
Ewout
Vout
13
R286 D
G C279
10UF
100 S +
1/6W R289
50V
1K
1/8W
10-5 PG17**/PG19**/PG21**
10 Schematic Diagrams
8 12.08 V (IC261, #26) 13 2.20 V (IC251, #15)
CH1 P-P = 12.08 V CH1 RMS = 7.396 V CH1 P-P = 2.20 V CH1 RMS = 2.776 V
PG17**/PG19**/PG21** 10-6
10 Schematic Diagrams
10-4 HORI & VERTICAL Part Schematic Diagram
R304
20K
R305
2.4K
C422
R404 R301
15K
R303
200
CN409
1.2nF
9
L403
2KV
C457 R473
C460
300nF
18K
250V 1/8W
MPS
Q462
3 R420 C413 SKS10N20 R474
1K
R472 S6
1/8W
1.2K
R475 Q461 1/8W
R411 R412 100K KSC-945-Y
1/8W
R421
C411 C412
R405
C452
EK-04
C451
EK-04
220
C458
10-7 PG17**/PG19**/PG21**
10 Schematic Diagrams
Table 10-3. IC301 (TDA8172) Table 10-6. IC501 (TL494CN) 2 10.96 V (IC402, #6) 3 230 V (Q405, Source) 4 11.6 V (Q406, Gate) 5 54 V (Q406, Drain)
pin # MODES MODES
pin #
31 kHz 68 kHz 91 kHz 31 kHz 68 kHz 91 kHz
1 1.09 1.09 1.08 1 4.86 4.86 4.86
2 12.43 12.28 12.21 2 4.86 4.86 4.86
3 9.65 9.65 9.41 3 1.49 1.32 1.29
CH1 P-P = 10.96 V CH1 RMS = 6.180 V CH1 P-P = 230 V CH1 RMS = 150.1 V CH1 P-P = 11.6 V CH1 RMS = 6.944 V CH1 P-P = 54 V CH1 RMS = 22.44 V
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