Samsung sch-880 Service Manual

Samsung Electronics

4-3

3. Dsub 25 PIN CONNECTOR PIN DESCRIPTION (TEST CABLE 1, BACK SIDE)

DATA

Dsub CONN.

DESCRIPTION

PIN NO.

V_F

12,21

DGND

2, 4, 6, 13, 19

BATT

15, 16, 22

C_F

3,20

TX_AUDIO

5

DP_TX_DATA

7

RX_AUDIO

1

DATA

Dsub CONN.

DESCRIPTION

PIN NO.

DP_RX_DATA

8

HP_PWR

9

RI

10

CD

11

RTS

14

CTS

17

DTR

18

4. CONVERSION TABLE OF FREQUENCY vs CHANNEL 

T Y P E

CHANNEL

CONVERSION EQUATION

REMARK

TX 1 

≤

N 

≤

799

F=0.03 X N + 825.00

N ; CH NUMBER

FREQUENCY

990 

≤

N 

≤

1023

F=0.03 X (N-1023) + 825.00

F ; FREQUENCY

RX

1 

≤

N

≤

799

F=0.03 X N + 870.00

(AMPS/CDMA)

FREQUENCY

990 

≤

N 

≤

1023

F=0.03 X (N-1023) + 870.00

14

15

16

17

18

19

20

21

22

23

24

25

1

2

3

4

5

6

7

8

9

10

11

12

13