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Feb. 2005
CIRCUIT DIAGRAM (MAIN BOARD POWER)
fig.MAIN-POWER-SC
Q8
Q4
N.I.U
N.I.U
1
1
R117
R109
N.I.U
N.I.U
LCD back light, MUTE POWER
& PHONES POWER(12V)
AC_POWER
D
D5
JK5
RB081L-20
PSB-3U
2
FL1
1
1
2
1
(DC12V)
3
2
HEC0470-01-640
C221
0.1
SH-202
3Amax
POWER_ON/OFF
H:ON/L:OFF
28
CPU power
supply(3.3V)
IC25
UPC29M33T
1
3
IN
OUT
C205
C295
0.1
0.1
D
C209
N.I.U
4
3
R116 47k
C222
22/16
D
R118 0
R119
C223
N.I.U
0.1
D
D
TP364
3.3V_CPU
TP365
C206
100/16
C208
0.1
D
6
Q29
5
CPH6302
2
4
1
R183
100k
TP376
1
1
Q30
DTC114EUA
D
TP373
Q2B
TPC8303
5
3
6
R115
100k
1
TP375
C216
C219
0.1
470/16
1
Q7
2SC4738
R184
22k
A
D
A
D
A
CPU power supply(3.3V):regulator
digital power supply(3.3V):DC-DC convertor
digital power supply(5V):DC-DC convertor
analog power supply(+9V):regulator
hard disk power & LCD back light
supply(12V):AC adaptor direct
hard disk power
HD power
Q2A
TPC8303
8
1
7
R108
TP366
N.I.U
C207
C273
0.1
470/16
D
D
to SW
BOARD
digital power
CN5
supply(5V)
CN11
B7B-PH-K-S
TP370
+ 5
D
IC26
UPC2933T
1
IN
C210
C211
C215
470p
470p
0.1
D
D
TP374
IC27
TA7809F
1
3
IN
OUT
C217
0.1
C220
470/16
A
BR-1200CD
digital power
supply(3.3V)
TP367
+
D 3. 3
3
OUT
C214
C213
0.1
100/16
D
D
+9V
analog power
supply(+9V)
A
29
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