MiTAC 7521 PLUS/N User Manual

105

7521

7521

Plus / N N/B MAINTENANCE

Plus / N N/B MAINTENANCE

Symptom:

Symptom:

When the power button is pressed, nothing happens, no fan activi

When the power button is pressed, nothing happens, no fan activi

ty is heard and power indicator is not light up

ty is heard and power indicator is not light up

.

.

8.1 NO POWER:

D/VMAIN

PF501

6.5A/32VDC

U14

H8/3434F

ADINP

PJ501

PC509
0.1U

PD501
RLZ24D

PD4

EC31QS04

PL3

120Z/100M

PQ6
DTC144WK

2

3

1

PQ12

2N7002

G

D

S

3

1

2

D

S

G

IN 5VTAP
SENSE OUT

F/B ERR-
SHUTDN GND

PWR_VDDIN

VDD5

S

G

D

VDD5_SW#

F2

R199

U32
LP2951-02BM

8
2
7
3

6
1
5
4

X

C247

10U

Q22

Q23

DTC144WK

3

2

1

D

S

G

3

1

2

ADEN#_P

BATT

1

4

5

6

7

8

2

3

PJ4

6

PF3

6.5A/32VDC

PR2

301K

PC5

0.1U

50V

PR1
100K

PU9

SI4435DY

PR23
33K

PR21
100K

BAT_V

BATTERY IN

RP7

38

BAT_V

POWER IN

PL501

120Z/100M

D

S

G

LEARNING

PR13

1M

PQ5

2N7002

PR14
120K

G 4

6

7

8

2

3

S

D

1

5

PR15
470K

PR19
715K

PR18
100K

+

-

PC6

0.1U

PL1

120Z/100M

PL2

120Z/100M

PC1

0.01U

PC18

0.1U

PQ8

PR13

10K

PR7

100K

VDD5S_P

Q509

BATT_ALARM

PU2

SI4835DY

PC2
0.1U

PR9

4.7K

PD3

EC31QS04

PD1

EC10QS041M

PD2

EC10QS041M

D/VMAIN

1.25V

PU2B

J514

CHARGE B’D

POWERBTN#

SW2

POWER BUTTON

R575

C588

R195
100K

J1

47

BAT_V

BATT

PR16

226K

+S5V

VDD5_SW
FROM H8

0