RT-XV300H - Sharp Audio Service Manual (repair manual). Page 12

1

MOTOR

D1

Output

Motor Control

2

FWD

D2

Output

FWD, REV, REC, LED direct drive

3

REV

D3

Output

LED ON = L

4

REC

D4/RTP

Output

LED OFF =H

5

REV

D5/RTP

Output

LED drive

6

T-RDY

D6/INT0/Z

Output

REV1     REV2      Lighting LED
H             H
H             L
L              H

7

REV2

D7/CNTR

Output

Serial communication with system microcomputer

8

T-CLK

D8/SCK

Input

T-RDY ; Transmission Ready signal from TAPE microcomputer

9

T-DATA

D9/SOUT

Output

T-CLK ; Reception clock signal from SYS microcomputer

10

T-CMD

P20/SIN

Input

T-DATA ; Transmission data from TAPE microcomputer
T-CMD ; Reception data from SYS microcomputer

11

PCNT-IN

P21/INT

Input

Power control signal input  Power ON = H

12

RESET

RESET

Input

RESET      OFF = L

13

CNVss

CNVss

—

GND

14

Xout

Xout

—

XOUT Main clock ceramic oscillator 6 MHz

15

Xin

Xin

—

XIN

16

Vss

Vss

—

GND

17

Vdd

Vdd

—

+ 5V

18

Vref

Vref

—

+ 5V

19

AVss

AVss

—

GND

20

KEY1

P30/AIN0

Input

Various key input (A/D input)

21

MKEY1

P31/AIN1

Input

Cassette mechanism SW detection (A/D input)
PLAY-SW, F.P.A-SW, F.P.B-SW

22

MKEY2

P32/AN2

Input

Cassette mechanism SW detection (A/D input)
CST-SW, CrO

2

-SW

23

APSS/INI

P33/AN3

Input

APSS music interval detection port            DOLBY mode
            Interval = H                            or     Initial setting
            Music = L                                       Input

24

REV3

P00

Output

Reverse IND control
                 Lighting = H

25

M-MUTE

P01

Output

EQ mute control
      Mute ON = H
               OFF = L

26

DOLBY-B/C

P02

Output

27

DOLBY-ON/OFF

P03

Output

28

REC CNT

P10

Output

EQ REC circuit ON/OFF control
              ON = H
              OFF = L
*According to timing chart

29

CrO

2

-R/P

P11

Output

EQ CrO

2

 selection control

Mechanism SW CrO

2

 ON = L (NORMAL)

                                   OFF = H (CrO2)
*According to timing chart

30

BIAS

P12

Input

EQ bias ON/OFF control
BIAS ON = H
         OFF = L
*According to timing chart

31

PLS-IN

P13

Input

TAPE rotation pulse detection

32

SOL

D0

Output

Solenoid control
Solenoid ON = L
               OFF = H

Off

B

C

DOLBY-B

L

H

L

DOLBY-C

L

L

H

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