JVC KD-LX555R service manual BA6956AN IC830, IC831 Reversible motor driver

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SECTION 4 Description of major ICs

4.1BA6956AN (IC830, IC831) : Reversible motor driver

• Block diagram

				TSD
						CONTROL LOGIC
1	2	3	4	5	6	7	8	9
VREF	OUT2	RNF	OUT1	VM	Vcc	FIN	GND	RIN

•	Pin function

Pin No.		Symbol	Function

1		VREF	Output high voltage level control terminal

2		OUT2	Output terminal for motor

3		RNF	GND of driver division

4		OUT1	Output terminal for motor

5		VM	Power supply for driver division

6		Vcc	Power supply for signal division

7		FIN	Input terminal for control logic

8		GND	GND

9		RIN	Input terminal for control logic

• Truth table

FIN	RIN	OUT1	OUT2	MODE

H	L	H	L	Forward rotation mode

L	H	L	H	Reverse rotation mode

H	H	L	L	Break Mode

L	L	OPEN	OPEN	Stand-by mode

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Contents KD-LX555R Area SuffixBA6956AN IC830, IC831 Reversible motor driver BR24C01AFV-W-X IC1502 Eeprom GND A2 GNDSCL SDA GNDAddress VCC SCL SDAGND Data DecoderQual VSS3 CMP MUXVDD1 Rclk VDD2HA13164A IC961 Regulator HD74HCT126T-X IC1500,IC1503 Buffer LA47505 IC941 Power amp Stby AC CONT1Outfr OUTFR+VIN1 VIN1-A VIN1+A VCCP1 VO+VCCP2 VIN4 VIN4G VIN1-BVCCP1 VIN1-AVIN1+A VCCP2VDD OUT Soft Timer GND VDD Select DetectorFront OUT 2 Volume Rear OUT2 Rear OUT1 Clock DataINA DefpDefn INB11 LC75878W IC601 LCD driver 12 NJM4565V-X IC1572 Dual ope amp GND STB VIN VoutAoutput Input +INPUT Output 13 NJU7241F25 IC1651 RegulatorVCC APC on 15 TA2157FN-X IC1601RF ampPIN SEL TEB Rfgc Vctrlpin APC SW TE BAL APC OFFGvsw SEL APC LDOGND OFF GND CD-RW16 TC94A14FA IC1621 DSP & DAC PVDD3 AVSS350 No.49793 Stanby ResetVddt Vssl18 UPD784217AGC208 IC962 Main micon 12CDAI PowerBuzzer 12CDAO19 UPD784225GK-629 IC1501 CPU MP3 STB MP3 ResetTest Mode DAC ML20 PCM1716E-X IC1571 D/A converter Block diagram Standard schematic diagrams CD servo control section LCD & Key control section Electrical parts list KD-LX555RRK104JA0J Resistor Front board CD board RK822JA0J COMP.RESISTOR RK303JA0J COMP.RESISTOR

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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.