Sony MDX-CA680 Xras, Xwe, Mvci, Asyo, Asyi, Avdd, Bias, Rfi, Avss, Pco, Fili, Filo, Cltv, Peak

Page 42

MDX-CA680/CA680X

Pin No.

Pin Name

I/O

 

 

Description

 

 

 

 

 

 

 

 

 

46

XRAS

O

 

Row address strobe signal output to the D-RAM (IC307)

“L” active

 

 

 

 

 

 

 

47

XWE

O

 

Write enable signal output to the D-RAM (IC307)

“L” active

 

 

 

 

 

 

 

 

 

48

D1

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

49

D0

I/O

 

 

 

 

 

 

 

Two-way data bus with the D-RAM (IC307)

 

 

 

 

 

 

 

 

 

 

50

D2

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

51

D3

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

52

MVCI

I

 

Digital in PLL oscillation input from the external VCO

Not used (fixed at “L”)

 

 

 

 

 

 

 

 

53

ASYO

O

 

Playback EFM full-swing output terminal

 

 

 

 

 

 

 

 

 

54

ASYI

I (A)

 

Playback EFM asymmetry comparator voltage input terminal

 

 

 

 

 

 

 

 

55

AVDD

—

 

Power supply terminal (+3.3V) (analog system)

 

 

 

 

 

 

 

 

 

56

BIAS

I (A)

 

Playback EFM asymmetry circuit constant current input terminal

 

 

 

 

 

 

57

RFI

I (A)

 

Playback EFM RF signal input from the CXA2523AR (IC302)

 

 

 

 

 

 

 

 

 

58

AVSS

—

 

Ground terminal (analog system)

 

 

 

 

 

 

 

 

 

 

59

PCO

O (3)

 

Phase comparison output for master clock of the recording/playback EFM master PLL

 

 

 

 

 

 

60

FILI

I (A)

 

Filter input for master clock of the recording/playback master PLL

 

 

 

 

 

 

61

FILO

O (A)

 

Filter output for master clock of the recording/playback master PLL

 

 

 

 

 

 

62

CLTV

I (A)

 

Internal VCO control voltage input of the recording/playback master PLL

 

 

 

 

 

 

63

PEAK

I (A)

 

Light amount signal (RF/ABCD) peak hold input from the CXA2523AR (IC302)

 

 

 

 

 

 

64

BOTM

I (A)

 

Light amount signal (RF/ABCD) bottom hold input from the CXA2523AR (IC302)

 

 

 

 

 

 

65

ABCD

I (A)

 

Light amount signal (ABCD) input from the CXA2523AR (IC302)

 

 

 

 

 

 

 

66

FE

I (A)

 

Focus error signal input from the CXA2523AR (IC302)

 

 

 

 

 

 

 

 

67

AUX1

I (A)

 

Auxiliary signal (I3 signal/temperature signal) input from the CXA2523AR (IC302)

 

 

 

 

 

 

68

VC

I (A)

 

Middle point voltage (+1.65V) input from the CXA2523AR (IC302)

 

 

 

 

 

 

 

69

ADIO

O (A)

 

Monitor output of the A/D converter input signal

Not used (open)

 

 

 

 

 

 

 

 

70

AVDD

—

 

Power supply terminal (+3.3V) (analog system)

 

 

 

 

 

 

 

 

 

71

ADRT

I (A)

 

A/D converter operational range upper limit voltage input terminal (fixed at “H” in this set)

 

 

 

 

 

 

72

ADRB

I (A)

 

A/D converter operational range lower limit voltage input terminal (fixed at “L” in this set)

 

 

 

 

 

 

 

 

 

73

AVSS

—

 

Ground terminal (analog system)

 

 

 

 

 

 

 

 

 

 

 

74

SE

I (A)

 

Sled error signal input from the CXA2523AR (IC302)

 

 

 

 

 

 

 

 

75

TE

I (A)

 

Tracking error signal input from the CXA2523AR (IC302)

 

 

 

 

 

 

 

 

 

76

DCHG

I (A)

 

Connected to the +3.3V power supply

 

 

 

 

 

 

 

 

 

 

 

77

APC

I (A)

 

Error signal input for the laser automatic power control

Not used (fixed at “L”)

 

 

 

 

 

 

 

78

ADFG

I

 

ADIP duplex FM signal (22.05 kHz ±

1 kHz) input from the CXA2523AR (IC302)

 

 

 

 

 

 

 

 

79

F0CNT

O

 

Filter f0 control signal output terminal

Not used (open)

 

 

 

 

 

 

 

 

80

XLRF

O

 

Serial data latch pulse signal output terminal Not used (open)

 

 

 

 

 

 

81

CKRF

O

 

Serial data transfer clock signal output terminal Not used (open)

 

 

 

 

 

 

 

82

DTRF

O

 

Writing serial data output terminal Not used (open)

 

 

 

 

 

 

 

 

83

APCREF

O

 

Control signal output to the reference voltage generator circuit for the laser automatic power

 

control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

84

TEST0

O

 

Input terminal for the test Not used (open)

 

 

 

 

 

 

 

 

 

85

TRDR

O

 

Tracking servo drive PWM signal (–) output to the BH6518FS (IC303)

 

 

 

 

 

 

86

TFDR

O

 

Tracking servo drive PWM signal (+) output to the BH6518FS (IC303)

 

 

 

 

 

 

 

 

87

DVDD

—

 

Power supply terminal (+3.3V) (digital system)

 

 

 

 

 

 

 

 

 

88

FFDR

O

 

Focus servo drive PWM signal (+) output to the BH6518FS (IC303)

 

 

 

 

 

 

89

FRDR

O

 

Focus servo drive PWM signal (–) output to the BH6518FS (IC303)

 

 

 

 

 

 

 

90

FS4

O

 

Clock signal (176.4 kHz) output terminal (X’tal system)

Not used (open)

 

 

 

 

 

 

 

 

 

42

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Contents Specifications MDX-CA680/CA680XElectrical Adjustments Table of Contents GeneralDisassembly Exploded ViewsLocation of controls Section GeneralSetting the clock US model US model AEP, UK Models Precautions Toyota Section Disassembly Disassembly FlowSUB Panel Assy Mechanism Deck MG-164MA-138 Main BoardHeat Sink Servo BoardMD Cover Assy Float BlockLO Motor Assy Loading M903 Lever LE23 AssyHolder Assy Chucking ARM AssyOptical PICK-UP KMS-241C SL Motor Assy Sled M902, SP Motor Assy Spindle M901Section Electrical Adjustments MD SectionTuner Section Section Diagrams IC101 PCM1718E/2KCXA2523AR IC305 BA6287F IC401 TDA7402TR IC505 BA8270F-E2 Block Diagram Servo Section EFM/ACIRC ENCODER/DECODERBlock Diagram Tuner Section FM/AM Tuner UnitBlock Diagram Main Section 23 a 23 B 24 F 24 E 24 HBlock Diagram BUS CONTROL/POWER Supply Section +B SwitchSignal path Circuit Boards Location Semiconductor Location MDX-CA680/CA680X MDX-CA680/CA680X D558 D560 D601 D609 D610 D612 MDX-CA680/CA680X Schematic Diagram Main Board 2/3 See page 40 for Waveforms MDX-CA680/CA680X K1 S2 K2 Schematic Diagram SUB Board Printed Wiring Board KEY Board Schematic Diagram KEY Board See page 40 for Waveform KEY Board IC PIN Function Description Mvci XrasXWE AsyoSprd SrdrSfdr SpfdVCC XstbyVref WbladjDfctsel ResetEject DpllselUnireq ERROR-PWMLinkoff UnickioKEYIN1 VSMNIL KEYIN0PW on IIC SIOIIC CKO ColswSection Exploded Views General SectionFront Panel Section LCD901Mechanism Deck MG-164MA-138 159 157156 158 161Section Electrical Parts List KEYSWITCH, KEY Board with LED List SWITCH, Tactile with LED D-BASS KEY MainMain Diode DTZ-TT11-16B Ref. No Description Remark R18 Short R21 216-825-11 Main Sensor Servo VibratorInductor Chip Servo SUB Disc Slot Illumination CA680X505 501 502503 506 507Memo Revision History

MDX-CA680 specifications

The Sony MDX-CA680 is an advanced multi-disc car audio system that exemplifies Sony's commitment to delivering high-quality sound and innovative features. With its sleek design and user-friendly interface, it stands as a popular choice for audiophiles and casual listeners alike. This model supports both MD (MiniDisc) playback as well as traditional CD formats, providing exceptional versatility for music enthusiasts who prefer various media.

One of the standout features of the MDX-CA680 is its 40 watts maximum output per channel. This power allows for dynamic sound reproduction across a wide range of musical genres. By utilizing Sony's proprietary Dynamic Bass Enhancement technology, the system enriches low-frequency sounds, making them feel fuller and more immersive, perfect for bass-heavy tracks.

The MDX-CA680 is designed with user convenience in mind. Its rotary control knob and intuitive button layout facilitate easy navigation through tracks and settings, allowing drivers to focus on the road while effortlessly managing their audio experience. The system also boasts a detachable faceplate, a crucial security feature for preventing theft.

Another notable characteristic of the MDX-CA680 is its support for various audio formats. Besides MD and CD, the system can handle MP3s, enabling users to create and playback custom playlists with ease. The player’s compatibility with CD-R and CD-RW media also enhances its functionality, allowing users to enjoy burned discs filled with their favorite tunes.

The display on the MDX-CA680 is characterized by a clear and bright LCD screen that provides essential information at a glance. This includes track titles, elapsed time, and artist names, making it easy to follow along with your music. Additionally, the unit supports adjustable EQ settings, allowing users to personalize their audio experience to suit their preferences.

In terms of installation, the MDX-CA680 is designed to integrate seamlessly into various vehicle models, featuring a standard DIN size that fits most aftermarket dashboards. Overall, the Sony MDX-CA680 stands out in the realm of car audio systems, offering a blend of versatility, quality, and user-friendly features that enhance the driving experience, making every journey more enjoyable.
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