Sony MDX-CA680 service manual Xstby, Vref, Vcc, Wbladj, Csled, Adin, Adagc, Rfagc, Agci, Rfo

Page 44

MDX-CA680/CA680X

•SERVO BOARD IC302 CXA2523AR (RF AMP, FOCUS/TRACKING ERROR AMP)

Pin No.

Pin Name

I/O

 

 

Description

 

 

 

 

1

I

I

I-V converted RF signal I input from the optical pick-up block detector

 

 

 

 

2

J

I

I-V converted RF signal J input from the optical pick-up block detector

 

 

 

 

3

VC

O

Middle point voltage (+1.65V) generation output terminal

 

 

 

 

4 to 9

A to F

I

Signal input from the optical pick-up detector

 

 

 

 

10

PD

I

Light amount monitor input from the optical pick-up block laser diode

 

 

 

 

11

APC

O

Laser amplifier output terminal to the automatic power control circuit

 

 

 

 

12

APCREF

I

Reference voltage input terminal for setting laser power

 

 

 

 

 

 

13

GND

—

Ground terminal

 

 

 

 

 

 

 

14

TEMPI

I

Connected to the temperature sensor

Not used (open)

 

 

 

 

15

TEMPR

O

Output terminal for a temperature sensor reference voltage Not used (open)

 

 

 

 

16

SWDT

I

Writing serial data input from the MD mechanism controller (IC501)

 

 

 

 

17

SCLK

I

Serial data transfer clock signal input from the MD mechanism controller (IC501)

 

 

 

 

18

XLAT

I

Serial data latch pulse signal input from the MD mechanism controller (IC501)

 

 

 

 

19

XSTBY

I

Standby signal input terminal “L”: standby (fixed at “H” in this set)

 

 

 

 

20

F0CNT

I

Center frequency control voltage input terminal of internal circuit (BPF22, BPF3T, EQ) input

terminal

 

 

 

 

 

 

 

 

 

 

 

 

21

VREF

O

Reference voltage output terminal

Not used (open)

 

 

 

 

22

EQADJ

I

Center frequency setting terminal for the internal circuit (EQ)

 

 

 

 

23

3TADJ

I

Center frequency setting terminal for the internal circuit (BPF3T)

 

 

 

 

 

 

24

VCC

—

Power supply terminal (+3.3V)

 

 

 

 

 

 

25

WBLADJ

I

Center frequency setting terminal for the internal circuit (BPF22)

 

 

 

 

26

TE

O

Tracking error signal output to the CXD2662R (IC301)

 

 

 

 

27

CSLED

I

Connected to the external capacitor for low-pass filter of the sled error signal

 

 

 

 

28

SE

O

Sled error signal output to the CXD2662R (IC301)

 

 

 

 

 

 

29

ADFM

O

FM signal output of the ADIP

 

 

 

 

 

 

30

ADIN

I

Receives a ADIP FM signal in AC coupling

 

 

 

 

31

ADAGC

I

Connected to the external capacitor for ADIP AGC

 

 

 

 

 

32

ADFG

O

ADIP duplex signal (22.05 kHz ±

1 kHz) output to the CXD2662R (IC301)

 

 

 

 

33

AUX

O

Auxiliary signal (I3 signal/temperature signal) output terminal Not used (open)

 

 

 

 

34

FE

O

Focus error signal output to the CXD2662R (IC301)

 

 

 

 

35

ABCD

O

Light amount signal (ABCD) output to the CXD2662R (IC301)

 

 

 

 

36

BOTM

O

Light amount signal (RF/ABCD) bottom hold output to the CXD2662R (IC301)

 

 

 

 

37

PEAK

O

Light amount signal (RF/ABCD) peak hold output to the CXD2662R (IC301)

 

 

 

 

38

RF

O

Playback EFM RF signal output to the CXD2662R (IC301)

 

 

 

 

39

RFAGC

I

Connected to the external capacitor for RF auto gain control circuit

 

 

 

 

40

AGCI

I

Receives a RF signal in AC coupling

 

 

 

 

 

41

COMPO

O

User comparator output terminal

Not used (open)

 

 

 

 

 

42

COMPP

I

User comparator input terminal

Not used (fixed at “L”)

 

 

 

 

43

ADDC

I

Connected to the external capacitor for cutting the low band of the ADIP amplifier

 

 

 

 

44

OPO

O

User operational amplifier output terminal Not used (open)

 

 

 

 

45

OPN

I

User operational amplifier inversion input terminal Not used (fixed at “L”)

 

 

 

 

 

 

46

RFO

O

RF signal output

 

 

 

 

 

 

47

MORFI

I

Receives a MO RF signal in AC coupling

 

 

 

 

 

 

48

MORFO

O

MO RF signal output

 

 

 

 

 

 

 

 

44

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Contents Specifications MDX-CA680/CA680XTable of Contents General DisassemblyElectrical Adjustments Exploded ViewsLocation of controls Section GeneralSetting the clock US model US model AEP, UK Models Precautions Toyota SUB Panel Assy Section DisassemblyDisassembly Flow 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 M901Tuner Section Section Electrical AdjustmentsMD 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 Xras XWEMvci AsyoSrdr SfdrSprd SpfdXstby VrefVCC WbladjReset EjectDfctsel DpllselERROR-PWM LinkoffUnireq UnickioVSM NILKEYIN1 KEYIN0IIC SIO IIC CKOPW on ColswSection Exploded Views General SectionFront Panel Section LCD901Mechanism Deck MG-164MA-138 157 156 158159 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 CA680X501 502 503505 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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