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JVC CHX1500RF - CH CD Changer, Service Manual

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JVC CHX1500RF - CH CD Changer Service Manual Download Page 33

CH-X1500RF

(No.49804)1-33

4.4 BR24C01AFV-W-X (IC503) : EEPROM

• Pin  layout

• Block diagram

• Pin function

*1  An open drain output requires a pull-up resister.

A0

A1

A2

GND

Vcc

WP

SCL

SDA

A0

A1

A2

GND

1

2

3

4

Vcc

WP

SCL

SDA

8

7

6

5

1kbit  EEPROM  ARRAY

7bit

ADDRESS
DECODER

SLAVE/WORD
ADDRESS  REGISTER

7bit

8bit

DATA
REGISTER

CONTROL  LOGIC

HIGH VOLTAGE GEN.

Vcc LEVEL DETECT

ACK

START

STOP

Pin name

I/O

Description

Vcc

-

Power supply

GND

-

Ground (0v)

A0A1A2

IN

Slave address set

SCL

IN

Serial clock input

SDA

IN / OUT

Slave and word addressserial data input serial data output *1

WP

IN

  Write protect input

Summary of Contents for CHX1500RF - CH CD Changer

Page 1: ... 1 Important Safety Precautions 1 2 2 Disassembly method 1 4 3 Adjustment method 1 22 4 Description of major ICs 1 30 DISP BBE LEVEL F SEL RPT RND INT CD CHANGER CONTROL 42 F SEL CH X1500 KS RF150 Area Suffix J Northern America CH X1500RF is a combination of CH X1500 and KS RF150 KS RF150 is a combination of Remote control and the RF unit ...

Page 2: ... to such burrs in the case of preforming repair of this system Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check This unit can only be connected to the JVC car receivers controllers equipped with MP3 CD changer control functions If connected to any other receiver controller this unit cannot work even CDs may not play back ...

Page 3: ...tion of the laser diode in the optical pickup The tester s internal power source can easily destroy the laser diode 1 3 Handling the traverse unit optical pickup 1 Do not subject the traverse unit optical pickup to strong shocks as it is a sensitive complex unit 2 Cut off the shorted part of the flexible cable using nippers etc after replacing the optical pickup For specific details refer to the r...

Page 4: ... 4 1 Remove the screw A to unlock the mounting direction knob located on the side of the main unit 2 Turn the mounting direction knob in the direction of the ar row using a coin etc to remove it The knob can be re moved only when it is set to this position 3 Remove the four screws B attaching the bottom cover on both sides of the main unit 4 Turn the unit upside down so the bottom surface is facin...

Page 5: ...jack board assembly and remove 4 Lift the changer unit upward 5 Remove the damper springs from the mechanism chassis if required REFERENCE To reassemble refer to the diagram below Fig 5 Fig 6 Fig 6 1 Fig 7 Fig 8 Fig 9 Fig 9 1 Damper Damper Damper shaft Damper Push out with your finger before attaching Apply alcohol to the shaft then immediately attach the damper After attaching check that the shaf...

Page 6: ...moving the main board assembly See fig 11 1 Remove the screw F attaching the power IC 2 Remove the four screws G attaching the main board as sembly and remove 3 Disconnect the wire from connector CN602 on the main board assembly 4 Disconnect the wire from connector CN501 on the main board assembly 5 Disconnect the card wire from connector CN604 on the traverse mechanism board assembly Fig 11 E a b...

Page 7: ...gazine lock arm 3 Turn the magazine lock arm in the direction of the arrow un til the notch is at the c position to remove it from the chas sis Fig 12 Fig 13 2 4 3 Remove the positioning motor assembly See fig 14 1 Remove the two screws I attaching the positioning motor ATTENTION When removing the positioning motor assembly from chassis remove the spacer attaching the wires 2 Slightly lift the pos...

Page 8: ...slider mounting position at the widest hole Fig 15 2 4 5 Remove the front slider See fig 16 1 Position the unit with the rear section facing down Rotate the third gear located on the bottom of the unit in the direc tion of the arrow clockwise until the front slider is moved to the outermost position 2 Remove the E washer attaching the front slider and re move from the chassis Fig 16 Third gear Rea...

Page 9: ... the nine screws J attaching the top plate 2 Disconnect the section d attached to the rear of the unit then lift the top plate slightly 3 Move the top plate toward the rear of the unit to remove the upper rod from the top plate Fig 17 Fig 18 J J J Rod Top plate d J Top plate ...

Page 10: ...front side of the unit Be sure to first remove the spring from the lifter side as shown in the upper part of the diagram 2 Lift the lifter unit upward then remove the lower rod to re move the lifter unit from the chassis Fig 19 Fig 20 Remove this part first Proper orientation Elevator spring Lower rod Lifter unit ...

Page 11: ...nit 2 Remove the lower rod Fig 21 2 4 9 Remove the side bracket and traverse mechanism assenbly See fig 22 1 Remove the two screws L attaching the side bracket and remove the side bracket 2 Remove the three shafts on the traverse mechanism as sembly from the lifter unit Fig 22 K K Lifter bracket Lifter unit Traverse mechanism assembly Side bracket L L ...

Page 12: ... 5 Remove the screw O attaching the shaft holder retaining the feed slide shaft assembly and the middle gear and re move 6 Remove the middle gear REFERENCE Remove gears and motors only when required 7 Move the pickup assembly upward from the gear section and remove it from the traverse chassis assembly 8 Remove the two screws P attaching the rack arm and re move 9 Pull out the feed slide shaft ass...

Page 13: ...e tray motor assembly from the tray motor holder Fig 27 Fig 28 2 4 12 Separation of the chassis L assembly and chassis R assembly See fig 29 1 Remove the two screws T retaining the chassis L and R assemblies 2 Slide the chassis L assembly toward the front and detach it then remove the chassis L upward Fig 29 R R Tray motor assembly Tray motor Tray motor holder S T T Chassis L assembly Chassis R as...

Page 14: ...dge position then attach the mechanism board using the screw M At this time check that the rest switch is correctly placed 4 To mount the rack arm first move the pickup to the middle position and fixing it with the screw P CAUTION When reassembling the mechanism board reattach the flexible wire to connector CN603 on the mechanism board and then unsolder the sorting round point Next reattach the me...

Page 15: ...dge mount the lift er unit and side bracket unit from the side Check each at tached section and check that the joint g of the lifter unit is correctly inserted into the holes h of the side bracket unit After reassembled check that levers move together 4 Turn the lifter unit upside down As shown in Fig 37 slide the lever 30 mm away from the edge and then mount the lifter bracket L assembly Fig 35 F...

Page 16: ...ombine the chassis L and R assemblies so that the hook section i of the chassis L assembly is inserted into the notch of the chassis R assembly by sliding it from the front side and then the two lib j jointed to the chassis L assembly 3 After reassembled fix with the screw T 4 Attach the elevator spring between the lifter unit and the chassis Fig 38 Fig 39 Fig 40 Lifter unit Lower rod Chassis R as...

Page 17: ... rod to k 2 Check that the five points l m n o and p are correctly positioned When mounting section p set it so that the bending sec tion of the top plate pinches section q of the lifter unit 3 Attach the top plate with six screws J Fig 41 Fig 42 Fig 43 Fig 44 Remove this part first Proper orientation Elevator spring k Upper rod J J J Rod Top plate l m n p o q o section Lifter unit ...

Page 18: ...lider is lined up with the right hole of the stud 3 Attach the E washer on the shaft 4 Position the unit with the front side facing down then mount the rear slider Check that the r s and t positions are correctly mounted as shown in Fig 46 5 Rotate the third gear in the direction of the arrow counter clockwise until the lifter unit is at the top position Fig 45 Fig 46 Psition so that the stud and ...

Page 19: ...e back of the sensor board assembly 3 Attach the shorter spring to the hook of the lift arm Fig 47 2 5 7 Mounting the main board See fig 48 1 Rotate the third gear clockwise until section u of the front slider and the third hole from the right are lined up Be sure to set properly If incorrectly set the switches on the as sembly may be damaged 2 After they are correctly positioned mount the main bo...

Page 20: ...onnector CN603 on the mechanism board 10 Remove the three screws M from the round hole on the chassis R assembly and remove 11 Remove the screw O attaching pickup shaft holder and re move the pickup assembly CAUTION When replacing the pickup be sure to apply counter measures against static electricity grounding the opera tion table wrist band and soldering iron To remove it first sorting round poi...

Page 21: ... 54 Fig 55 Flexible wire Soting round point Pickup Q P Spring Feed slide shaft assembly Pickup Lack arm Pickup assembly Shaft holder Feed slide shaft assembly Middle gear Traverse chassis O Shift approx 30mm Shift approx 30mm Lifter unit lever ...

Page 22: ...r clockwise and unchuck the disc Remove the dampers and the top cover to take out the mechanism Remove the item s causing the disc jam through the clearance at the top of the lifter Remove the lifter bracket L and return the tray to the magazine RESET Press EJECT for 3 sec Completed YES YES YES NO NO NO Remove the bottom cover Is the disc set in the playing position Are trays stored in the magazin...

Page 23: ...sm assembly E3 Tray motor error Trays cannot be opened or closed when exchanging or ejecting discs Does the tray move when changing or ejecting discs YES 5 NO 6 5 Check that TRAY OUT SW S602 and TRAY IN SW S603 function correctly E4 Pick returning error Does the feed pickup unit return to the inner area of the disc when ejecting YES 7 NO 8 9 7 Check the rest switch 8 If the feed gear is rotated ch...

Page 24: ...part way E1 03 00 17 Tray in switch time out Tray in switch Low Tray out switch Low Tray in switch faulty or other defect E1 03 00 18 MAG in switch Low to High Magazine removed when tray partly retracted E1 03 00 19 Lifter raise error Wait position time out Position motor inoperative E1 02 00 21 Wait position time out Position not stable in fine adjust mode E1 02 00 22 Wait position time out Other...

Page 25: ...p correctly moves to the inner area of the disc When the laser diode correctly emits No disc display Rough Servo Mode CLV Servo Mode Program Area CLV Servo Mode Lead In Area Digital 0 RF signal Focus Servo Loop ON TERMINAL Microprocessor commands Microprocessor commands Tracking Servo Loop ON Servo CLV Rough Servo Acceleration Acceleration Microprocessor commands Spindle motor 20 FMO TC9462 CN502 ...

Page 26: ...own and stops The position motor does not function The tray motor goes forward and back several times Check the connections to the receiver or the circuits in the vicinity of IC651 Check the linear position sensor VR601 Check the wiring of the CD 9 V power supply position motor Check the TRAY IN and TRAY OUT switches Exchange discs then check whether or not the feed motor moves Set from the STOP t...

Page 27: ...vicinity of IC581 pins H K Check the pickup and its connections NO YES YES Does the S search waveform appear at IC581 pins H and I 4V Is the disk rotated Does the RF signal appear at TP1 Is 4V present between IC581 pins 1 and 2 Check the spindle motor and its wiring Is 4V present at IC521 pin x Check the vicinity of IC581 Check IC501 and IC521 YES NO NO NO NO NO YES YES YES Check the circuits in t...

Page 28: ...und output from both channels L R Check the vicinity of the Q981 audio power supply NO NO NO NO YES YES YES YES YES Check IC521 and its peripheral circuits Is the audio signal including sampling output components output to IC521 pins and during Is the audio signal output at IC101 pins 1 and7during playback NO Check IC101 and its peripheral circuits Check the muting circuit Normal ...

Page 29: ...he whole optical block do not touch the semi fixed resistor If the laser power is lower than the specified value the laser diode is almost worn out and the laser pickup should be replaced If the semi fixed resistor is adjusted while the pickup is functioning normally the la ser pickup may be damaged due to excessive current 3 5 Replacement of laser pickup Is RF output 1 0 0 35Vp p Replace it NO YE...

Page 30: ...ct pin 7 CCLK Control data input pin 8 CDTI Control data input pin 9 AOUTR Rch negative analog output pin 10 AOUTR Rch positive analog output pin 11 AOUTL Lch negative analog output pin 12 AOUTL Lch positive analog output pin 13 VSS Ground pin 14 VDD Power supply pin 15 DZFR Rch data zero input detect pin 16 DZFL Lch data zero input detect pin De emphasis Control 8X Interpolator uP Interface Audio...

Page 31: ...DB4833FVE W IC502 Voltage detector Pin layout Block diagram Pin functions 1 2 3 4 5 VOUT GND VDD Vref Pin No Symbol Function 1 VOUT Reset output 2 SUB Sub slate connect to GND 3 N C Non connect 4 GND GND 5 VDD Power supply voltage ...

Page 32: ...g driver CH6 REV input 7 IN6FWD Loading driver CH6 FWD input 8 REG2SW Regulator 2 switch terminal 9 REG1SW Regulator 1 switch terminal 10 IN4 CH4 input 11 IN3 CH3 input 12 IN1 CH1 input 13 IN2 CH2 input 14 GND1 Power GND BTL driver unit 15 OUT2 BTL driver CH2 output 16 OUT2 BTL driver CH2 output 17 OUT1 BTL driver CH1 output 18 OUT1 BTL driver CH1 output 19 OUT3 BTL driver CH3 output 20 OUT3 BTL d...

Page 33: ...2 3 4 Vcc WP SCL SDA 8 7 6 5 1kbit EEPROM ARRAY 7bit ADDRESS DECODER SLAVE WORD ADDRESS REGISTER 7bit 8bit DATA REGISTER CONTROL LOGIC HIGH VOLTAGE GEN Vcc LEVEL DETECT ACK START STOP Pin name I O Description Vcc Power supply GND Ground 0v A0A1A2 IN Slave address set SCL IN Serial clock input SDA IN OUT Slave and word addressserial data input serial data output 1 WP IN Write protect input ...

Page 34: ...angement Pin function H High level L Low level X Irrelevant Z Off Hhigh impedance state of a 3 stage output Block diagram 14 13 12 11 10 9 8 1 2 3 4 5 6 7 Vcc 4C 4A 4Y 3C 3A 3Y 1C 1A 1Y 2C 2A 2Y GND Input Output C A Y L X Z H L L H H H 1Y 2Y 3Y 4Y 1A 1C 2A 2C 3A 3C 4A 4C ...

Page 35: ...X IC653 Regulator Pin layout Block diagram 4 8 NJU7241F33 X IC652 Voltage regulator A B 8 7 6 5 1 2 3 4 1 2 3 4 5 6 7 8 AOUTPUT A INPUT A INPUT V B INPUT B INPUT B OUTPUT V GND 1 VIN 2 VOUT 3 5 STB 4 NC Short protect 3 VOUT 1 GND Vref VIN 2 STB 5 GND 1 1 2 3 5 4 PIN FUNCTION 1 GND 2 VIN 3 VOUT 4 NC 5 STB ...

Page 36: ...k 20k 3k 180k 240k 240k 15pF 15pF 40pF 40pF 10pF 60k 60k 22k 22k 94k 94k 14k 50k 20k 20k 20k 40k 50k PEAK 15k 40k 2k 1 75k 1 3V 2k 1k 180k 3k 12k 12k 20k 40k 30k 10pF 50 A BOTTOM PEAK K 1 x0 5 x2 x0 5 x2 PIN SEL APC SW TEB TE BAL RFGC AGC Gian TEB TE BAL VCTRLPIN VCC APC ON 50 12dB Normal mode 0dB HiZ APC ON 0 6dB Normal mode 0dB GND APC OFF LDO H 50 0dB CD RW mode 12dB ...

Page 37: ...cking search system 12 RFDC O RF signal peak detection output pin 13 GVSW I AGC FE TE amp gain change pin 14 VRO O Reference voltage VRO output pin VRO 1 2VCC When VCC 3 3V 15 FEO O Focus error signal generation amp output pin 16 FEN I Focus error signal generation amp negative phase input pin 17 RFRP O Signal amp output pin for track count Combining RFRP signal and TEO signal with TC94A14F FA con...

Page 38: ... LRCK O L R channel clock output pin L for L channel and H for R channel Output polarity can be inverted by command 3 AOUT O Audio data output pin MSB first or LSB first selectable by command 4 DOUT O Digital data output pin Outputs up to double speed playback 5 IPF O Correction flag output pin When set to H AOUT output cannot be corrected by C2 correction processing 6 VDD3 Digital 3 3V power supp...

Page 39: ... on high impedance with UHS L H output with UHS H 39 AVDD3 Analog 3 3V power supply voltage pin 40 FMO O Feed equalizer output pin 41 DMO O Disc equalizer output pin 42 VSS3 Digital GND pin 43 VDD3 Digital 3 3V power supply voltage pin 44 TESIN I Test input pin Normally fixed to L 45 XVSS3 System clock oscillator GND pin 46 XI I System clock oscillator input pin 47 XO O System clock oscillator out...

Page 40: ...8 47 46 45 44 43 42 41 40 39 38 37 DIT DAC DAC Bus Switch Address calc 2sets General output port C Pointer register Y Pointer register X Pointer register ERAM 2k word CROM 4k word 7 Y RAM 4k word X RAM 4k word Flag Timer register X0 X1 X2 Y0 Y1 Y2 MX AX AY MY MZ ALU A2 A1 A0 A3 round limit round limit Audio I F Microcom I F MAC Program control Instruction decoder PROM 4k 3 12k word PRAM 256word 1M...

Page 41: ...voltage for DAC Rch 28 VSSR GND for DAC R ch 29 TESTP I Test terminal H test mode L normal 30 TXO O SPDIF output 31 34 Po0 Po3 O General purpose output 0 3 35 VDDT Power supply for digital 3 3V 36 38 Po4 Po6 O General purpose output 4 6 39 REQ O REC terminal 40 VSS GND for digital 41 IRO I O External interrupt input 42 VDDM Internal 1Mbit SRAM power supply 2 5V 43 44 Fi0 Fi1 I Flug input 0 1 45 VS...

Page 42: ...unication start interrupu input 20 MP3 REQ I CD MP3 request input 21 NC Non connect 22 EJECT I Eject key input 23 VDD0 Connect to 5V 24 AVDD Connect to AD CONT power supply for A D converter 25 IOP I Pickup IOP measurement input 26 29 KEY0 3 I Key input 0 3 8bit A D input 30 TEMP IN I Temp detection input 31 L SENSOR I Linear senser input 8bit A D input 32 NC I Non connect connect to GND 33 GND GN...

Page 43: ...output RW L 70 71 NC Non connect 72 GND GND 73 MP3 DI I CD MP3 data input 74 MP3 DO O CD MP3 data output 75 MP3 CK O Clock for CD MP3 data 76 MP3 RESET O CD MP3 reset 77 MP3 STB O CD MP3 standby output H standby 78 CD CHECK I CD CHECK mode input only reset mode 79 LED O Lifter LED output 80 EPROM CLR I EPROM clear input 81 VDD Connect to 5V 82 MAG IN I Magazin switch L magazin in 83 TRAY IN I Tray...

Page 44: ... No 49804 AV MULTIMEDIA COMPANY 10 1 1chome Ohwatari machi Maebashi city 371 8543 Japan VICTOR COMPANY OF JAPAN LIMITED 200303WPC Printed in Japan CH X1500RF ...

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