Service manual

3-42 3-43
2) POWER BLOCK DIAGRAM
12V REG
BLOCK
TO HDD
5V
12V
From Main
TO MAIN
5.0VA
12V
5.0V
3.3V
5.4V
PWR ON/OFF
5.4V S/W
BLOCK
(Q151, R160, R161
R162, Q152, R152
R153, C157)
5V REG & S/W
BLOCK
(IC151, R151,
C151)
2
4
7
8
10
11
12
13
14
15
16
17
18
(D125, D126, C128
C126, L122, C130)
(D123, D124,
C125, C126,
L123, C127)
(D121, C122
L121, C124)
(IC157, IC158, R156
R157, C155, C156)
3.3V REG
S/W BLOCK
(IC155, IC156, R154
R155, R159, R158
C154)
5VA REG
BLOCK
(IC152, C152)