STR-DE135 - Sony Audio Service Manual (repair manual). Page 18

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Pin No.

Pin Name

I/O

Description

1 to 7

DIG7 to DIG1

O

Digit drive signal output to the fluorescent indicator tube (FL201)

8

VDD

—

Power supply terminal (+5V)

9

S.CLK

O

Serial data transfer clock signal output to the LC78212 (IC401), PLL IC on FM/AM tuner pack    
“L” active

10

S.DATA

O

Serial data output to the LC78212 (IC401), PLL IC on FM/AM tuner pack    “L” active

11

PLL.DATA

I

Serial data input from the PLL IC on FM/AM tuner pack    “L” active

12

S.CE (LC7822)

O

Serial chip enable signal output to the LC78212 (IC401), PLL IC on FM/AM tuner pack
“H” active

13

S.CE (LV1010)

O

Serial chip enable signal output terminal     “L” active    Not used (pull down)

14

REAR-RY

O

Relay drive signal output for the rear side speaker    “H”: relay on    Not used (open)

15

BRIDGE

O

Bridgeable relay drive signal output terminal    “H”: relay on    Not used (open)

16

PROTECT

I

Over load detect signal input from the protect circuit    “L”: protect detect

17

RESET

I

System reset signal input from the reset signal generator (IC950, Q201)    “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

18

AUTO-STOP

I

Tuned display detection signal input from the FM/AM tuner pack    “L”: tuned

19

STEREO-IN

I

Stereo detection signal input from the FM/AM tuner pack    “L”: stereo

20

AVSS

—

Ground terminal (for A/D converter analog system)

21

SP-RY

O

Relay drive signal output for the speaker protect    “H”: relay on

22

SURR-RY

O

Relay drive signal output for the surround speaker    “H”: relay on    Not used (pull down)

23

POWER-RY

O

Relay drive signal output for the power on/off control    “H”: relay on

24

SIGNAL

I

FM and AM signal meter voltage detection signal input from the FM/AM tuner pack

25

A/D-4

I

Key input terminal (A/D input)    S210 (NAME) key input
(Used for the AEP and UK models only)

26

A/D-3

I

Key input terminal (A/D input)    S231 to S239 (BASS BOOST, MUTING, SHIFT, 0, MEMORY 
or MEMORY/ENTER, CD, MD/TAPE, TV/SAT or TV/LD, RDS PTY) keys input
(S239 RDS PTY key: used for the AEP and UK models only)

27

A/D-2

I

Key input terminal (A/D input)    S221 to S230 (FM or FM/AM, 6, 5, 4, 7, 8, 9, FM MODE, 
VIDEO, TUNER) keys input

28

A/D-1

I

Key input terminal (A/D input)    S211 to S220 (DISPLAY, AM or RDS EON, 3, 2, 1, TUNING 
or TUNING/CHAR –/+, PRESET TUNING or PRESET/PTY SELECT –/+, DIRECT) keys input 
(S211 DISPLAY key: used for the AEP and UK models only)

29

AVDD

—

Power supply terminal (+5V) (for A/D converter analog system)

30

AVREF

I

Reference voltage (+5V) input terminal (for A/D converter)

31

RDS DATA IN

I

RDS data input from the RDS decoder (IC1) (Used for the AEP and UK models only)

32

OPEN

—

Not used (open)

33

GND

—

Ground terminal

34

X1

I

Main system clock input terminal (4.19 MHz)

35

X2

O

Main system clock output terminal (4.19 MHz)

36

WOFER RLY

O

Relay drive signal output for the woofer speaker    “H”: relay on    Not used (open)

37

LED SELECT

O

LED select signal output terminal    “H” active    Not used (open)

38

DOLBY LED

O

LED drive signal output terminal    “H”: LED on    Not used (open)

39

C STUDIO LED

O

LED drive signal output terminal    “H”: LED on    Not used (open)

40

HALL LED

O

LED drive signal output terminal    “H”: LED on    Not used (open)

41

ENTER LED

I

Not used (fixed at “L”)

42

VOL DOWN

O

Motor drive signal (volume down direction) output to the volume motor drive (IC202)
“H” active

43

VOL UP

O

Motor drive signal (volume up direction) output to the volume motor drive (IC202)
“H” active