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8.1 No Power
When the power button is pressed, nothing happens ,power indicator does not light up.
VCC_IN
R374
P7
U10
5V_PWR_ON
SN74LVCH16374A
Extend GPIO
VCC3
C174
0.1U
IR_EN#
VCC3
R135
C129
100K
0.1U
R421
AUD_PWR_ON#
VCC3
R133
C125
0.1U
100K
LCD_PWR_ON#
Barracuda PDA Maintenance
Q42
5V_ON
S
D
G
IRLML6402
R419
100K
C254
2K
P15
C
1U
Q34
D
B
S
2N7002
E
IRDA_3V
Q18
P11
D
S
G
R246
IRLML6402
C175
100K
1U
AUDIO 3.3V
VCC_AUD
Q6
L21
S
D
C130
120Z/100M
G
IRLML6402
1U
5V_ON
C256
2K
1U
LCD 3.3V
VCC_LCD
Q5
S
D
C126
C127
G
IRLML6402
1U
0.1U
5V_ON
L18
10UH
Murata-LQH3C
C163
C164
5
0.1U
10U
VIN
16V
16V
U32
4
SHDN
2
GND
LT1615
POWER SOURCE +15V & -15V
VOUT= 1.23 * ( 1 + 634K / 56.2K)=15.1V
P13
L17
10UH
POWER SOURCE 5V
Murata-LQH3C
20%
M1FS4
C158
C155
5
1
U45
340K/1%
0.1U
10U
Vin
SW
4
LT1930
SHDN
GND
2
VOUT= 1.255 * ( 1 + 269K / 84.5K )=5.25V
D9
2
MA3X740
C159
3
1
0.1U
50V
1
3
1
SW
D10
2
R170
MA3X740
C162
634K/1%
0.1U
1%
50V
3
C176
FB
1U
R172
25V
56.2K/1%
1%
P15
VCC_IN
VCC_5V
D7
5V_ON
C154
C153
+
R164
0.1U
15U
1%
VCC3
3
FB
R165
107K/1%
1%
VCC_+15
P15
VCC_-15
C180
1U
25V
5V_ON
VCC_5V
VCC_+15
VCC_-15
IRDA_3V
VCC_AUD
VCC_LCD
121
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