Sony XR-C440 service manual Pin No Pin Name Function

Page 30

Pin No.

Pin Name

I/O

Function

 

 

 

 

 

 

 

 

 

 

 

 

45

 

 

 

ILLON

O

Illumination power supply control pin

 

 

 

 

 

 

 

 

 

 

 

At PW SEL on: ACC on: “H”

 

 

 

 

 

 

 

 

 

 

 

At PW SEL off: Power on: “H”

 

 

 

 

 

 

 

 

 

 

 

 

46

 

 

 

BEEP

O

Beep sound output pin

 

 

 

 

 

 

 

 

 

 

 

 

47

 

 

 

MUT

O

System mutig control pin. At muting: “H”

 

 

 

 

 

 

 

 

 

 

 

 

48

 

 

VOLCE

O

Chip enable output pin to electrical volume

 

 

 

 

 

 

 

 

 

 

 

 

49

 

 

SUBCE

O

Chip enable output pin to sub volume (not used)

 

 

 

 

 

 

 

 

 

 

 

 

50

 

VOLCKO

O

Clock output pin to electrical volume

 

 

 

 

 

 

 

 

 

 

 

 

51

 

SUBCKO

O

Clock output pin to sub volume (not used)

 

 

 

 

 

 

 

 

 

 

 

 

52

 

 

VOLSO

O

Data output pin to electrical volume

 

 

 

 

 

 

 

 

 

 

 

 

53

 

TAPMUT

O

Tape mutig control pin. At muting: “H”

54

 

DOLON

I/O

DOLBY control input/output pin

 

 

 

 

 

 

 

 

 

 

 

At initial mode: valid/invalid selection input of DOLBY function

 

 

 

 

 

 

 

 

 

 

 

At normal mode: DOLBY on/off output

 

 

 

 

 

 

 

 

 

 

 

 

55

 

 

DOLBC

I/O

DOLBY B/C selection pin

 

 

 

 

 

 

 

 

 

 

 

At initial mode: valid/invalid selection input of DOLBY C function

 

 

 

 

 

 

 

 

 

 

 

At normal mode: DOLBY B/C selection output. “L”: DOLBY B, “H”: DOLBY C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

56

 

 

AMSIN

I

Tape music with/without detection pin. “L”: with music

 

 

 

 

 

 

 

 

 

 

 

 

57

 

MTLSEL

I/O

METAL control input/output pin

 

 

 

 

 

 

 

 

 

 

 

At initial mode: auto/manual serection input of METAL function. “L”: manual

 

 

 

 

 

 

 

 

 

 

 

At manual mode: METAL on/off output. “H”: on

 

 

 

 

 

 

 

 

 

 

 

At auto mode: input st 30 MTLIN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

58

 

 

AD_ON

O

Power supply control pin for A/D conversion

59

 

RAMBU

I

Reset detection pin of RAM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

60

 

 

 

RESET

I

Reset input pin

 

 

 

 

 

 

 

 

 

 

 

 

61

 

 

 

SIRCS

I

SIRCS signal input pin

62

 

 

 

BU_IN

I

Buck up power supply detection pin

 

 

 

 

 

 

 

 

 

 

 

 

63

 

PW_SEL

I

Power select switch input pin

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

64

 

 

 

ACCIN

I

Accessory voltage detection pin

 

 

 

 

 

 

 

 

 

65

 

NOSESW

I

Front panel removal or attaching detection pin

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

66

 

TELMUT

I

Telephone muting detection pin. “L”: 20dB audio muting

 

 

 

 

 

 

 

 

 

 

 

 

67

 

KEYACK

O

Key acknowledge signal input pin

68

 

 

 

VDD

—

Power supply

 

 

 

 

 

 

 

 

 

 

 

 

69

 

OSCOUT

O

Main system clock output pin (5MHz)

 

 

 

 

 

 

 

 

 

 

 

 

70

 

 

 

OSCIN

I

Main system clock input pin (5MHz)

71

 

 

 

GND

—

GND

 

 

 

 

 

 

 

 

 

 

 

 

72

 

XT_OUT

O

Sub system clock output pin (32.768kHz)

 

 

 

 

 

 

 

 

 

 

 

 

73

 

 

 

XT_IN

I

Sub system clock input pin (32.768kHz)

74

 

 

 

AVDD

—

Power supply

 

 

 

 

 

 

 

 

 

 

 

 

75

 

AVREF0

I

A/D reference voltage input pin

 

 

 

 

 

 

 

 

 

 

 

 

76, 77

KEYIN0, KEYIN1

I

Key input pin (A/D input)

78

 

 

D.POSI

I

D-BASS switch input pin (A/D input)

 

 

 

 

 

 

 

 

 

 

 

 

79

 

 

 

VSM

I

FM/AM signal meter voltage detection pin (A/D input)

 

 

 

 

 

 

 

 

 

 

 

 

80

 

KEYSEL

I

Key function setting pin

– 40 –

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Contents 925-536-12 SpecificationsAudio Power Specifications US model NEWElectrical Adjustments Table of Contents GeneralAssembly of Mechanism Deck DiagramsSection General XR-C450 XR-C450 E, Saudi Arabia XR-C440/XR-C450 E, Saudi Arabia XR-C450 US, Canadian Page XR-C440 Page XR-C450 Saudi Arabia model US, Canadian model Saudi Arabia model Section Disassembly Front Panel ASS’YCover ASS’Y SUB PANEL, Mechanism Deck Main BOARD, Heat SinkSection Assembly of Mechanism Deck HousingARM Suction Gear LDG-FT Lever LDG-A / LDG-BGuide C Torque Measurement Mode Torqu Meter Meter Reading Section Mechanical AdjustmentsSection Electrical Adjustments Tape Tension Measurement Mode Torqu Meter Meter ReadingFM Auto Scan/Stop Level Adjustment Tape Speed AdjustmentDolby Level Adjustment DB=0.775FM Noise Focus Adjustment AM MW Auto Scan/Stop Level AdjustmentFM Stereo Separation Adjustment Adjustment Location Main Board Conductor SidePage Page Page Page IC361 IC Block Diagrams BU2624F-E2 IC651IC301 CXA2510AQ-T4 IC701 BA8270F-E2 IC671 BA3918-V2IC PIN Function Description ΜPD78058GC-913-3B9 System ControlPin No Pin Name Function Chassis Section Cord with ConnectorSection Exploded Views 3309-720-A Main BOARD, CompleteFront Panel Section XR-C440 LCD901 1-801-587-11 Display PANEL, Liquid CrystalFront Panel Section XR-C450 118Mechanism Deck Section MG-25C-136 M901 A-3291-665-A Motor ASSY, Main CAPSTAN/ ReelSection Electrical Parts List KEY SWITCH, KEY Board with LED Dspl SWITCH, KEY Board with LED +SWITCH, KEY Board with LED Mute SWITCH, KEY Board with LED BTMMain BOARD, Complete KEY MainMetal Glaze ElectRef. No Description Remark C19 126-157-11 Conposition Circuit Block CP1 PIN, Connector 16PPLUG, Connector 12P GAP, Discharge DiodeRN5VD23AA-TL IC1MM1322XFBE Jack RemoteCarbon SWITCH, Slide Frequency Select RES, ADJ, Carbon 1.0K SwitchSWITCH, Slide Power Select RES, ADJ, Carbon 1.0KVibrator Accessories & Packing MaterialsParts for Installation and Connections MiscellaneousRevision History
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