CDX-838 - Sony Car Audio Service Manual (repair manual). Page 33

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Pin No.

Pin Name

I/O

Description

1 to 3

—

O

Not used (open)

4

CH.F

O

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

5

CH.R

O

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

6

LOAD2

I

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

7

LOAD1

I

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

8

SENS2

I

Internal status signal (sense signal) input from the CXA1992BR (IC11)

9

LIM.SW

I

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

10

EE.INIT

I

Initialize signal input for the EEPROM (IC202)    “H”: format    Fixed at “L” in this set

11

EE.CLK

O

Serial data transfer clock signal output to the EEPROM (IC202)

12

EE.DATA

I/O

Two-way data bus with the EEPROM (IC202)

13 to 19

—

O

Not used (open)

20

SINGLE

I

Setting terminal for the single disc/multiple discs mode
“L”: single mode, “H”: multiple discs mode (fixed at “H”)

21

XRST

O

System reset signal output to the CXA1992BR (IC11), CXD2530Q (IC101) and CXD2522Q
(IC401)    “L”: reset

22

FOK

I

Focus OK signal input from the CXA1992BR (IC11)    “L”: NG, “H”: OK

23

SENS

I

Internal status signal (sense signal) input from the CXD2530Q (IC101)

24

GFS

I

Guard frame sync signal input from the CXD2530Q (IC101)    “L”: NG, “H”: OK

25

GRSRT

O

Reset signal output to the CXD2522Q (IC401)    “L”: reset

26

XQOK

O

Subcode Q OK pulse signal output to the CXD2522Q (IC401)    “L” active

27

SDTI

I

ESP status signal input from the CXD2522Q (IC401)

28

XSOE

O

ESP status read enable signal output to the CXD2522Q (IC401)    “L” active

29

ESPXLT

O

ESP latch pulse signal output to the CXD2522Q (IC401)    “L” active

30

RST

I

System reset signal input from the SONY bus interface (IC302) and reset signal generator (IC304)
“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

MCK

I

Input of signal for the fine adjustment (linear position sensor adjustment; RV201) of elevator
position (A/D input)

39

EHS

I

Elevator height position detect input from the RV202 (elevator height sensor) (A/D input)

40

H.TEMP

I

High temperature sensor input terminal    Not used (fixed at “L”)

41

XRDE

O

D-RAM read enable signal output to the CXD2522Q (IC401)    “L” active

42

XWRE

O

D-RAM write enable signal output to the CXD2522Q (IC401)    “L” active

43

A.MUTE

O

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

44

EMP

O

Emphasis mode output to the D/A converter (IC601)    “H”: emphasis on

45

ML

O

Fast speed dubbing control signal output to the D/A converter (IC601)    “L”: fast speed

46

GRSCOR

I

Subcode sync (S0+S1) detection signal input from the CXD2522Q (IC401)