XR-C5100R, XR-C5103R, XR-C5109R - Sony Car Audio Service Manual (repair manual). Page 18

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1

TUNMUT

O

FM audio signal muting control output terminal    “H”: muting on

2

AMPON

O

Standby control signal output to the power amplifier  (IC801)    “L”: standby

3

ILLON

O

4

PW ON

O

Main system power supply on/off control signal output to the BA3918 (IC601)    “H”: power on

5

AMPMUTE

O

Muting control signal output to the power amplifier  (IC801)    “L”: muting on

6

RCIN1

I

Rotary remote commander shift key A/D input terminal

7

VDD

—

Power supply terminal (+5V)

8

X IN

I

Main system clock input terminal (8 MHz)

9

X OUT

O

Main system clock output terminal (8 MHz)

10

GND

—

Ground terminal

11

XT IN

I

Sub system clock input terminal (32.768 kHz)

12

XT OUT

O

Sub system clock output terminal (32.768 kHz)

13

EX2

I

Connected to ground

14

RESET

I

System reset signal input from the reset signal generator (IC571) and reset switch (S601)
“L” is input for several 100 msec after power on, then it changes to “H”

15

RDSCKI

I

Serial data transfer clock signal input from the RDS decoder (IC3)

16

BU IN

I

Battery detect signal input terminal    “H”: battery on

17

KEYACK

I

Input of acknowledge signal for the key entry    Acknowledge signal is input to accept function
and eject keys in the power off status    On at input of “L”

18

VOLSO

O

Serial data output to the electrical volume  (IC151)

19

VOLCKO

O

Serial data transfer clock signal output to the electrical volume  (IC151)

20

VOLCE

O

Chip enable signal output to the electrical volume  (IC151)

21

TAPEMUT

O

Tape muting on/off control signal output to the CXA2509AQ (IC351)    “H”: tape muting on

22

LMLOD

O

Loading/tape operation motor control signal output to the MM1322XFBE (IC360)
(For the loading direction and forward side operation)    *1

23

LMEJ

O

Loading/tape operation motor control signal output to the MM1322XFBE (IC360)
(For the eject direction and reverse side operation)    *1

24

AMSON

O

Tape auto music sensor control signal output to the CXA2509AQ (IC351)
“L” is output to lower the gain for audio level at FF/REW

25

N/R OUT

O

Forward/reverse direction control signal output to the CXA2509AQ (IC351)
“L: forward direction, “H”: reverse direction

26

AMSIN

I

Whether a music is present or not from CXA2509AQ (IC351) is detected at auto music sensor
“L”: music is present, “H”: music is not present

27

PLLSO

O

PLL serial data output to the FM/AM PLL (IC1)

28

PLLCKO

O

PLL serial data transfer clock signal output to the FM/AM PLL (IC1)

29

PLLCE

O

PLL serial chip enable output to the FM/AM PLL (IC1)

30

RDSSI

I

Serial data input from the RDS decoder (IC3)

31

AD ON

O

Power supply on/off control signal output for the A/D converter    “L”: power on

32

DOLON

I/O

Dolby control in/out terminal
At initial mode: valid/invalid selection input of dolby function (“L” input: valid)
At normal mode: dolby on/off control signal output (“H” output: dolby on)
Not used this function (fixed at “H”)

Power supply on/off control signal output terminal at the illumination and liquid crystal display
driver (IC901)    “H”: power on
At power select switch (S801) on mode: “H” output at the accessory on
At power select switch (S801) off mode: “H” output at the power on

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