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25

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Pin No.

Pin Name

I/O

Description

1

VREF –

—

Reference voltage (0V) terminal (for A/D converter)

2

VSM

I

FM and AM signal meter voltage detection input from the FM/AM tuner unit (A/D input)

3 to 6

NC

—

Not used

7

NOISE-DET

I

Not used

8

MPTH

I

Not used

9

NC

—

Not used

10

VREF +

—

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

11

VDD

—

Power supply terminal (+5V)

12

OSC2

O

Main system clock output terminal (18.432MHz)

13

OSC1

I

Main system clock input terminal (18.432MHz)

14

VSS

—

Ground terminal

15

XI

I

Sub system clock input terminal (32.768kHz)

16

XO

O

Sub system clock output terminal (32.768kHz)

17

GND (MMOD)

—

Setting terminal for the single chip mode     “L”: single chip

18

LCD-SO (TX)

O

LCD serial data output to the liquid crystal display driver

19

LCD-SI (RX)

I

LCD serial data input from the liquid crystal display driver

20

LCD-CKO

O

LCD serial transfer clock signal output to the liquid crystal display driver

21

TU-SDA

O

Serial data output to the FM/AM tuner unit

22

TU-SI

I

Serial data input from the FM/AM tuner unit

23

TU-SCL

O

Serial data transfer clock signal output to the FM/AM tuner unit

24

LCD-RES

O

LCD reset signal output to the liquid crystal display driver    “L”: reset

25

LCD-CE

O

Chip enable signal output to the liquid crystal display driver    “H” active

26

KEYACK

I

Key acknowledge signal detect input from the liquid crystal display driver

27

DAVN-RDS

I

Not used

28

B/U-IN

I

Battery detect signal input from the bus interface and battery detect circuit
“L” is input at low voltage

29

NC

—

Not used

30

RAM BU

I

Internal RAM reset detection signal input terminal
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset     “L”: RAM reset

31

TEST-IN

I

Setting terminal for the test mode    “L”: test mode    Normally: fixed at “H”

32

NCI

I

Not used

33

RESET

I

System reset signal input from the reset signal generator or reset switch    “L”: reset                        
“L” is input for several 100 msec after power on, then it changes to “H”

34

TU-ENABLE

O

Chip enable signal output to the  FM/AM tuner unit    “H” active

35

BEEP

O

Beep sound drive signal output to the power amp

36

POWER-ON

O

Main system power supply on/off control signal output terminal    “H”: power on

37

ILL-IN

I

Not used

38

ACC-IN

I

Accessory detect signal input terminal    “L”: accessory on

39

NC

—

Not used

40

TEL-MUTE

I

Telephone muting signal input terminal    At input of “H”, the signal is attenuated by –20 dB
Used for the XR-CA340 only

41

NCI

I

Not used

42

UNI-SO

O

Serial data output to the bus interface

43

UNI-SI

I

Serial data input from the bus interface

44

UNI-CKO

O

Serial data transfer clock signal output to the bus interface

26

Pin No.

Pin Name

I/O

Description

45

SDA

I/O

Not used

46

NC

—

Not used

47

SCL

O

Not used

48

VOL-SO

O

Serial data output to the electrical volume

49

VOL-CE

O

Chip enable signal output to the electrical volume    “H” active

50

VOL-CKO

O

Serial data transfer clock signal output to the electrical volume

51

AMP-ON

O

Standby on/off control signal output to the power amp    “L”: standby mode, “H”: amp on

52

AMP-MUTE

O

Muting on/off control signal output to the power amp    “L”: muting on

53

MUTE

O

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

54

TU-MUTE

O

Not used

55

PORT2 (ST)

I

FM stereo broadcasting detection signal input from the FM/AM tuner unit
“H”: stereo display lighting

56

NC

—

Not used

57

LO/DX

O

Local/DX control signal output to the FM/AM tuner unit    “L”: DX

58

TU-ON

O

Tuner system power supply on/off control signal output terminal    “H”: tuner power on

59

FM-ON

O

FM system power supply on/off control signal output terminal
“L”: AM power on, “H”: FM power on    Not used

60

AM-ON

O

AM system power supply on/off control signal output terminal
“L”: FM power on, “H”: AM power on    Not used

61 to 68

NC

—

Not used

69

NOISE-ON

O

Not used

70 to 82

NC

—

Not used

83

ILL-COLOR

I

Illumination color select input terminal    “L”: amber illumination    “H”: green illumination    
(fixed at “H”)

84

DEST-SEL0

I

Destination setting terminal (fixed at “H”)

85

DEST-SEL1

I

Destination setting terminal    XR-CA330: fixed at “L”,  XR-CA340: fixed at “H”

86

DEST-SEL2

I

Destination setting terminal                                                                                                                  
XR-CA330: fixed at “L”,  XR-CA340: input for the FREQUENCY SELECT switch

87, 88

NC

—

Not used

89

NOSE-SW

I

Front panel block remove/attach detection signal input terminal
“L”: front panel is attached

90

FLASH-W

I

Internal flash memory data write mode detection signal input terminal                                              
“L”: data write mode    Normally: fixed at “H”

91

NC

—

Not used

92

ILL-ON

O

Power on/off control signal output of the illumination LED and LCD back light                               
“H”: power on

93

BUS-ON

O

Bus on/off control signal output to the bus interface    “L”: bus on

94

SYS-RST

O

Reset signal output to the bus interface    “L”: reset

95

DAVSS

—

Ground terminal (for D/A converter)

96

TAPE-ON

O

Capstan/reel motor drive signal output terminal    “H”: motor on

97

N/R

I

Tape direction switch input terminal    “L”: reverse direction    “H”: forward direction

98

FF/REW

I

FF/REW detection switch input terminal    “L”: FF/REW mode

99

TAPE-IN

I

Tape in detection switch input terminal    “L”: tape in

100

DAVDD

—

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

27

• Items marked “*” are not stocked since they

are seldom required for routine service. Some
delay should be anticipated when ordering
these items.

• The mechanical parts with no reference num-

ber in the exploded views are not supplied.

• Hardware (# mark) list and Accessories are

given in the last of the electrical parts list.

NOTE:

• -XX and -X mean standardized parts, so they

may have some difference from the original
one.

• Color Indication of Appearance Parts

Example:
KNOB, BALANCE (WHITE) . . . (RED)

↑

↑

Parts Color Cabinet's Color

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

1

3-224-905-01 PANEL, SUB

2

X-3370-437-3 LOCK ASSY

3

3-041-581-11 DOOR, CASSETTE

4

3-044-125-01 SPRING, TORSION

5

3-376-464-11 SCREW (+PTT 2.6X6), GROUND POINT

6

1-776-207-31 CORD (WITH CONNECTOR) (POWER) (CA330)

6

1-783-736-61 CORD (WITH CONNECTOR) (POWER) (CA340)

* 7

X-3378-167-1 COVER ASSY, TOP

* 8

A-3340-273-A MAIN BOARD, COMPLETE (CA330)

* 8

A-3340-275-A MAIN BOARD, COMPLETE (CA340)

* 9

3-224-921-01 HEAT SINK

* 10

3-041-578-01 BRACKET (IC)

11

3-937-650-01 PLATE (C), GROUND

12

3-046-339-01 CUSHION (U)

13

3-232-738-01 INSULATED PLATE

* 14

3-256-389-01 CHASSIS

15

3-041-599-01 COLLAR (CA340)

15

3-041-599-11 COLLAR (CA330)

16

3-042-244-01 SCREW (T)

F901

1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) (10A)

TU100

1-693-524-11 FM/AM TUNER UNIT (FAE370-A01)

28

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

51

3-224-928-01 BUTTON (4-6) (4. 5. 6. BTM. DSPL)

52

3-224-912-01 BUTTON (1-3) (ATT. SENS. 1. 2. 3)

53

3-224-913-01 BUTTON (RELEASE) (CA330)

53

3-224-913-11 BUTTON (RELEASE) (CA340)

54

3-220-522-01 SPRING (RELEASE)

55

3-224-911-31 PANEL, FRONT (CA330)

55

3-224-911-41 PANEL, FRONT (CA340)

56

3-224-930-01 BUTTON (+/-) (CA330)

56

3-224-930-21 BUTTON (+/-) (CA340)

57

3-224-908-01 BUTTON (SOURCE) (SRC. MODE. SEL)

58

3-224-917-11 BUTTON (EJECT) (Z) (CA340)

58

3-224-917-21 BUTTON (EJECT) (Z) (CA330)

59

3-029-327-01 SPRING (EJECT)

60

3-224-916-11 BUTTON (REW) (m) (CA340)

60

3-224-916-21 BUTTON (REW) (m) (CA330)

61

3-375-372-01 SPRING (F/R)

62

3-224-915-11 BUTTON (FF) (M) (CA340)

62

3-224-915-21 BUTTON (FF) (M) (CA330)

63

3-224-907-01 BUTTON (D-BASS) (MBP. D. OFF)

64

3-224-929-01 BUTTON (SEEK)

(+ > M SEEK AMS m . -) (CA330)

64

3-224-929-11 BUTTON (SEEK)

(+ > M SEEK AMS m . -) (CA340)

* 65

3-224-927-01 PLATE (LCD), GROUND

66

1-694-696-31 CONDUCTIVE BOARD, CONNECTION

* 67

3-224-926-01 ILLUMINATOR

* 68

3-236-778-01 PLATE, LIGHT GUIDE

69

1-786-305-11 SWITCH, SHEET

70

3-224-904-01 PANEL, FRONT BACK

* 71

3-224-924-01 HOLDER (LCD)

* 72

A-3315-468-A PANEL ASSY, FRONT (CA330)

* 72

A-3315-469-A PANEL ASSY, FRONT (CA340)

73

X-3378-490-2 CASE (PANEL) ASSY

LCD900 1-804-512-11 DISPLAY PANEL, LIQUID CRYSTAL