CDX-600, CDX-606, CDX-626 - Sony Car Audio Service Manual (repair manual). Page 26

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Pin No.

Pin Name

I/O

Function

1

LIM.SW

I

Sled limit in detect switch (SW1) input terminal
“L”: When the optical pick-up is inner position

2

BUSON

I

Bus on/off control signal input from the SONY bus interface (IC204)    “H”: bus on

3

EJECT

I

Eject switch (SW303) input terminal    “H” active

4

LOAD1

I

Save end detect switch (SW12) input terminal
“L”: When completion of the disc chucking operation

5

LOAD2

I

Chucking end detect switch (SW11) input terminal
“L”: When completion of the disc chucking operation

6

A.MUTE

O

Audio line muting on/off control signal output terminal    “H”: muting on

7

EMPH

O

Emphasis mode output to the D/A converter (IC401)    “L”: emphasis on

8

CH.R

O

Motor drive signal (save direction) output to the chucking motor drive (IC52)
“H” active    *1

9

CH.F

O

Motor drive signal (load chucking direction) output to the chucking motor drive (IC52)
“H” active    *1

10

—

O

Not used (open)

11

ELV.R

O

Motor drive signal (elevator down direction) output to the elevator motor drive (IC301)
“L” active    *2

12

ELV.ON

O

Mechanism deck section power supply on/off control signal output    “H”: power on

13

CD RST

O

System reset signal output to the CXA1992BR (IC11) and CXD2530Q (IC101)    “L”: reset

14

CDON

O

D/A converter and servo section power supply on/off control signal output    “H”: power on

15 to 23

—

O

Not used (open)

24

AUTO ON/OFF

I

Setting terminal for the automatic adjustment
“L”: automatic adjustment, “H”: manual adjustment (fixed at “L” in this set)

25 to 29

—

O

Not used (open)

30

RESET

I

System reset signal input from the reset signal generator (IC202) and SONY bus interface (IC204) 
“L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

31

EXTAL

I

Main system clock input terminal (8 MHz)

32

XTAL

O

Main system clock output terminal (8 MHz)

33

VSS

—

Ground terminal

34

TX

O

Sub system clock output terminal    Not used (open)

35

TEX

I

Sub system clock input terminal    Not used (fixed at “L”)

36

AVSS

—

Ground terminal (for A/D converter)

37

AVREF

I

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

38

ATRIBT

I

Selection input of the custom file, D-BASS, etc.

39

MCK

I

Input of signal for the fine adjustment (linear position sensor adjustment; RV301) of elevator 
position (A/D input)

40

EHS

I

Elevator height position detect input from the RV302 (elevator height sensor) (A/D input)

41 to 47

—

O

Not used (open)

48

SCK

I

Serial data transfer clock signal input from the SONY bus interface (IC204)

49

SI

I

Serial data input from the SONY bus interface (IC204)

50

SO

O

Serial data output to the SONY bus interface (IC204)

51

SQCLK

O

Subcode Q data reading clock signal output to the CXD2530Q (IC101)

52

SUBQ

I

Subcode Q data input from the CXD2530Q (IC101)

53

—

O

Not used (open)

54

—

I

Not used (fixed at “H”)

55

MGLK

I

Magazine eject operation completion detect switch (SW301) input terminal
“L”: eject completed