4.17TC94A20F-011 (IC1652) : DAC/SRAM built in type D-ROM decoder+ MP3 decoder

• Pin layout

• Block diagram

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48

33

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

32

 

 

 

 

 

 

 

 

 

 

 

 

 

49

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

64

 

 

17

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

32

31

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DIT

 

 

 

DAC

 

 

DAC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bus

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Switch

 

 

 

 

 

 

 

 

 

 

General output

port

 

 

C-Pointer

register

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Address calc. 2sets

X-Pointer Y-Pointer

register register

 

 

 

AX AY

ALU

A2 A3

 

round & limit

 

Audio I/F

 

 

 

ERAM 2k word

 

 

 

 

 

MZ

 

A0 A1

 

 

 

 

 

Flag

 

CROM 4k word *7

 

 

register X0 X1 X2

Y0 Y1 Y2

MX MY

MAC

 

round & limit

 

 

 

 

 

Y-RAM

4k word

 

 

 

 

 

 

 

 

 

 

 

 

Timer

 

X-RAM

4k word

1Mbit SRAM

 

PRAM 256word

Program control

word=12k

 

 

Instruction

decoder

 

Microcom. I/F

I/FDRAM

 

SRAMI/F

 

 

PROM 4k*3

 

 

 

Interrupt

control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

General

 

 

SubCode I/F

 

 

VCO

 

 

 

Timing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

inputbport

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

generator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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2

1

1-50 (No.49793)

Page 19 Page 21
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JVC KD-LX555R service manual 50 No.49793
Page 19 Page 21

KD-LX555R specifications

The JVC KD-LX555R is a feature-rich car stereo receiver that combines cutting-edge technologies with an impressive array of functionalities, making it a popular choice among car audio enthusiasts. One of the standout features of the KD-LX555R is its compatibility with various audio playback formats, including MP3, WMA, and WAV files. This versatility allows users to enjoy their favorite music from different sources without compromising on sound quality.

Equipped with a front AUX input and a USB port, the KD-LX555R facilitates convenient connectivity for external devices like smartphones and USB drives. This feature enables users to access their digital music collections seamlessly while driving. Additionally, the unit's Bluetooth capability allows for hands-free calling and wireless audio streaming, enhancing convenience and safety by minimizing distractions while driving.

The receiver boasts a sleek and modern design, featuring an easy-to-read LCD display and user-friendly controls. The customizable illumination options enable users to match the display color to their vehicle’s interior, adding a personalized touch. Its ergonomic layout ensures that drivers can adjust settings and navigate menus with minimal effort, allowing for a safer driving experience.

Sound quality is a paramount consideration for JVC, and the KD-LX555R does not disappoint. It features a powerful MOSFET amplifier, delivering robust audio performance with impressive clarity and depth across all frequencies. The inclusion of a 3-band parametric equalizer also allows users to fine-tune the audio output according to their preferences and the acoustics of their car.

For those who desire even more control over their sound, the KD-LX555R supports additional amplifiers and subwoofers through its preamp outputs. This feature empowers users to easily upgrade their sound systems and achieve the desired audio experience. Moreover, the receiver integrates seamlessly with smartphones, enabling features like music control through voice commands.

In summary, the JVC KD-LX555R is a comprehensive car audio solution that emphasizes connectivity, sound quality, and user convenience. With its modern features, robust performance, and customizable options, it caters to a wide range of audio preferences, making it a worthy addition to any car. Whether enjoying favorite tracks or making hands-free calls, the KD-LX555R delivers an exceptional in-car experience that combines technology with practicality.
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