BenQ PE8700 service manual 1TURN on

5

4

3

2

1

+12VA

L24

Q2

F1

J6

+5VS

+12VA

1

2

VOUT_TRIGGER

1

S

D

8

D R

TOUT_12V

1

2

7

2

S

D

PICOFUSE

VCC_IR

R54

47

3

6

1

3

FCB3216K

S

D

+

4

5

69.42001.021

C114

G

D

R74

SCD437

D

+

Si4431DY

D

10UF/25

G

10K

C115

C116

C117

C118

C119

R55

84.04431.037

10UF/25

2

0.1UF

0.1UF

4.7UF/16

0.1UF

47K

U12

VCC

3

GG

2

GND

R56

1K

3

Q3

VOUT

1

2

TRIGGER

TRIGGER

TRIG

1

2N3904

FCB3216K

1:TURN ON

FM6038TM2

2

L27

R57

0:TURN OFF

IR

10K

FRONT

1

2N3904

3_C

1_B

2_E

R58

130

IR

C

C

+5VS

J9

1

2

IR

3

20.D0049.103

TX1

RX1

J7

+5VS

1

1

+5VS

2

R59

NC_R1206

2

3

3

1

2

4

C121

C122

4

B

C123

0.1UF

0.1UF

R60

NC_R1206

D18

D19

B

232

232

1

2

0.1UF

U14

R61

150/1206

2213008001

27V

27V

C1-

C1+

1

16

1

2

RSV+

C1+

VCC

RXX1

2

15

V+

GND

T1OUT

R62

150/1206

TXX1

3

14

C1-

T1OUT

C124

232_C2+

4

13

R1 IN

1

2

C2+

R1IN

0.1UF

232_C2-

5

12

RX

D20

D21

C2-

R1OUT

RSV-

6

11

27V

27V

V-

T1IN

7

10

C125

T2OUT

T2IN

8

9

R2IN

R2OUT

0.1UF

SP232

C126

C127

R68

R69

47PF/50

47PF/50

+5VS

1K

1K

R63

1K

Benq Corporation

A

A

Project Code

Model Name

OEM/ODM Model Name

99.J5877.001

HT720G

NA

CPU_TXD0

CPU_TXD0

Title

CONNECTOR BOARD

CPU_RXD0

CPU_RXD0R64

Size

PCB P/N

PCB Rev. Document Number

R ev.

100

<Size>

48.J5810.S02

S02

99.J5877.R22-C3-304-004

0

Date:

Monday, February 17, 2003

Sheet

6

o f

8

Prepared By

Reviewed By

Approved By

5

4

3

2

ANGEL HU

ALEX HY TSENG

BEN CHEN

1