Dell P992 Service Manual page 9

(4) Schematic Diagram of H4 Board
1 2
A
B
R1400 R1401
220 220
:RN :RN
C
S1405 S1404
MENU CONT-
4.6
D
Q1400
DTC114ESA-TP
3.1
LED DRIVE
R1406
150
0.5
R1407
220
G A
E
POWER
D1400
SML79423C-TP15
H4
(USER CONTROL)
F
3 4
D1402
R1402 R1403
100 100
RD5.1ESB
:RN :RN
S1402 S1401
S1400
BRT+ + -
R1421
10k
0
:RN
R1424
22k
:RN
Q1401
DTC114TSA
LED DRIVE
RD5.1ESB
5 6
R1404
470
FB1402
:RN
1.1µH
FB1403
1.1µH
FB1404
R1419
TH1400
JW
100k
R1420 C1407
D1403
10k 47
16V
B-SS9330<U/C>-H4..-EPS05
7 8 9
CN1400
8P
1 T_AMB
KEY SCAN
2
3 LED 1
TO D- b BOARD
LED 2
4 CN1103
GND
5
6 +5V
GND
7
C1498 CHASSIS GND
GND
0.1 8
:B
10
P992 (E) 4-16