Kenwood X-92-4590-00 Service Manual

CD MECHANISM ASSY

X92-4590-0x

SERVICE MANUAL

DESCRIPTION MECHANISM

X92-4590-00 (DXM-6510W) X92-4590-01 (DXM-6511W) X92-4590-02 (DXM-6512W) X92-4590-03 (DXM-6513W)

CONSTRUCTION OF MAJOR PARTS

MP START : Nov. 2001

outer-chassis

disc guide assy

damper bracket

roller lever assy

dumper (X4)

floating spring (X4)

traverse chassis assy

roller spring

Mecha PCB

X92-4590-0x

Pick-Up

Tr Coil Fo Coil

Spindle Motor

Loading & Sled

Motor

APC

IC4

Motor Driver

BLOCK DIAGRAM

Mother Board

IC10

1Chip IC

Servo Processor

RF Amp

MP3 Decorder

Vref

D.GND

Clock

16.93MHz

S.GND

IC9

IC8

IC7

Clock

24.57MHz

Buffer

WMA Decorder

D.GND

Level

Shifter

IC12

LPF

A.GND

IC11

DRAM

D.GND

IC5 Q1 D.GND

MI-COM

D.GND

IC3

/PON

D2.5V AVR

D.GND Los SW

IC6

A3.3V

A3.3V AVR

A.8V

Q4,5

SW5V

Q3 IC2

A.8V SW

D3.3V SWPON

A.GND

SW5V SW

0-01 Only

R-ch L-ch

A.GND

A.+8V D.GND

Bu.+5V

D4.7VD3.3V AVR

Loe/Lim SW

8Eje SW

12Eje SW

COMPONENTS DESCRIPTION

● CD PLAYER UNIT (X32-5350-0x)

Ref. No.

IC2 L88MS33T D3.3V AVR Power supply for the pickup, IC5, IC8-10 and IC11 IC3 UPC3025 D2.5V AVR Power supply for IC8

IC4 BA5824FP 4CH BTL driver IC5 703030BYGF-M01 Mecha. control MI-COM.

IC6 TAR5S33 A3.3V AVR Power supply for DAC, LPF operational reference voltage IC7 TC7MET541AKF Level shifting (3.3VÆ5V) Buffer and logic level conversion from IC10 to IC5 IC8 UPD61002GC-E01 WMA decoder IC9 TC7SHU04FU Clock buffer for WMA IC10 UPD63760GJ RF amplifier+CD DSP+MP3 decoder

IC11 IC12 NJM4580V Low pass filter 2nd low pass filter for audio signals

IC13 HD74LV14AT Schmitt trigger for WMA

Q1 DTA143EK SW5V SW Q2 MCH6101 APC LD power control

Q3 DTC124EUA D3.3V SW When PON (13pin) goes Hi, Q3 is turned on, and IC2 is working. Q4 DTA143XUA Q5 DTC124EUA supplied to IC6 and IC12.

Component Name Application/Function Operation/Condition/Compatibility

Focusing coil, tracking coil, spindle motor and sled motor driver, disc loading and eject operation.

IS41LV16257 or MSM51V4265EP70

4M bit DRAM For data buffer

When PON (14pin) goes Lo, Q1 is turned on, and SW5V is supplied to IC7 and AVREF (73PIN).

A.8V SW

When PON (13pin) goes Hi, Q4 and Q5 are turned on, and A.8V is

S7.5V S.GND

Lo/Ej Motor

X92-4590-0x

MICROCOMPUTER’S TERMINAL DESCRIPTION

● IC5 (CD PLAYER UNIT : X32-5350-0x)

Pin No. Pin Name I/O Description Processing Operation

1~8 NC O Not used (N.C.)

9 EVDD - Positive power supply connection terminal Connected to BU 5V lines.

10 EVSS - Ground connection terminal Connected to GND lines.

11,12 NC O Not used (N.C.)

13 PON O Power ON/OFF control terminal Lo: Power OFF, Hi: Power ON 14 PON O Power ON/OFF control terminal Lo: Power ON, Hi: Power OFF 15 LOE/LIM SW I Down limit SW detection terminal HiÆLo: Pickup most inner position detected 16 8EJE SW I 8cm disc detection SW input Not used (Pull down to GND lines) 17 LOS SW I Loading start detection SW input Not used (Pull down to GND lines) 18 12EJE SW I 12cm disc detection SW input Not used (Pull down to GND lines)

19,20 NC O Not used (N.C.)

21 VPP - FLUSH write terminal Not used (Connected to GND lines) 22 MUTE L O Lch. Audio muting request output Lo: Muting ON requested, Hi: Muting OFF requested 23 MUTE R O Rch. Audio muting request output Lo: Muting ON requested, Hi: Muting OFF requested

24~28 NC O Not used (N.C.)

29 EFLG I WMA error detection input Lo: No ERROR, Hi: ERROR detected 30 WAIT I Wait control signal detection input 31 FOK I Focusing condition detection input Lo: Focusing NG, Hi: Focusing OK

32,33 NC O Not used (N.C.)

34 RESET I Reset terminal Lo: Reset, Hi: Normal operation 35 XT1 I Sub clock resonator connection terminal Not used (Pull down to GND lines) 36 XT2 - Sub clock resonator connection terminal Not used (N.C.)

37 REGC -

38 X2 - Main clock resonator connection terminal 39 X1 I Main clock resonator connection terminal 40 VSS - Ground connection terminal Connected to GND lines. 41 VDD - Positive power supply connection terminal Connected to B U 5V lines. 42 NC O Not used (N.C.)

43 WRL O Multiplex WRITE signal output

44 NC O Not used (N.C.)

45 R/W O Multiplex R/W signal output

46 DSTB/RD O Multiplex DSTB/RD signal output

47 ASTB O Multiplex ASTB signal output 48,49 NC O Not used (N.C.) 50~57 AD0~AD7 I/O Multiplex address/data bus

Capacitor connection terminal for regulator inside microprocessor

Lo: Write signal for IC10 Not used for IC8

Not used for IC10 Lo: Read signal, Hi: Write signal for IC8 Lo: Read signal for IC10 Lo: Data strobe signal for IC8

X92-4590-0x

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Description Processing Operation

58 BVDD 59 BVSS - Bus interface ground connection terminal Connected to GND lines.

60~67 AD8~AD15 I/O Multiplex address/data bus

68 HCSB O Chip select control output to IC8 Lo: Chip select ON 69 CS O Chip select control output to IC10 Lo: Chip select ON 70 DSP RESET O DSP reset output Lo: Reset, Hi: Normal operation 71 REQ I Data transfer request input 72 DBBWRDY0 I DBB00 register write permission input 73 DBBRRDY0 I DBB00 register read permission input 74 AVDD 75 AVSS - A/D converter ground connection terminal Connected to GND lines. 76 AVREF I A/D converter reference voltage input terminal Connected to SW 5V lines.

77~80 NC I Not used (Connected to GND lines)

81 HOT I Temperature change detection input

82 M-CONT I Not used (Connected to GND lines) 83 WMA I WMA adaptation selection input Lo: WMA not adapted, Hi: WMA adapted 84 NC I Not used (Connected to GND lines) 85 ASEL I Audio output polarity selection input Lo: Non-inverted output, Hi: Inverted output 86 DASC I Shock proof method selection input Lo: Shock proof OFF, Hi: Shock proof ON 87 TEST2 I Test terminal 2 Not used (Pull down to GND lines) 88 TEST3 I Test terminal 3 Not used (Pull down to GND lines) 89 NC O Not used (N.C.) 90 MSTOP I MECHA. Stop interrupt input Lo: Stop, Hi: Normal operation 91 INTSV I Interrupt input from servo IC Hi: Interrupt 92 FOGUP I Focusing gain up interrupt input Lo: Normal operation, Hi: Focusing gain up 93 ZMUTE R I Rch. 0 bit muting detection input Lo: Muting OFF, Hi: Muting ON 94 ZMUTE L I Lch. 0 bit muting detection input Lo: Muting OFF, Hi: Muting ON 95 NC O Not used (N.C.)

96 D-MUTE O Driver muting output

97 SYS SDA I/O

98 NC O Not used (N.C.)

99 SYS SCL I/O

100 NC O Not used (N.C.)

Bus interface positive power supply connection terminal

A/D converter positive power supply connection terminal

I2C bus data line (communication line with System microprocessor)

I2C bus clock line (communication line with System microprocessor)

Connected to 3.3V lines.

Connected to BU 5V lines.

Detection voltage≥ 4V, Detection release voltage≤ 3.9V

Lo: Spindle motor, focusing actuator and tracking actuator outputs OFF

X92-4590-0x

Center

of rotation

OPERATION DESCRIPTION

[1] Disc Loading

(1) Turning the loading switch ON

1) When a disc is inserted, the disc arms open to the left and right and the claw below disc arm (L) sets the loading switch ON.

2) The above starts the motor rotation.

(2) Loading the disc

1) When the motor starts rotation, the worm gear also starts to turn as shown in the figure.

2) The rotation force is transmitted to the gear train.

3)When the force is transmitted to the final gear, the rollers rotate to pull in the disc.

Disc IN

Disc

Disc guide

Switch ON!

Disc arm(L) Disc arm(R)

Disc

Worm gear

Motor

Rubber rollers

Disc OUT

Roller

The disc is pulled in or out when the rollers are pushed against the disc guide.

[2] Operation of Slider (R)

(1) Activating the trigger arm

1) When the disc is pulled in by the rollers, the disc edge pushes the trigger arm and rotates it.

2)When the disc is an 8cm disc, it is pulled upwards by the tapering on the disc guide. The trigger arm is rotated when the disc pushes the claw (section A) located before the trigger arm.

When the 8cm disc reaches the loading end position, the roller areas supporting the disc decreases. To pre vent the disc from dropping in this case, the claw is provided with a projection f or supporting the disc.

Claw (A)

Side view

Position pushed by the disc

Disc IN

Trigger arm

Clamper chassis

Trigger arm

Disc

Projection

8cm Disc

X92-4590-0x

Locked

Center

of rotation

(2) Basic construction (Initial position

of the planetary gear mechanism)

1)Even after the disc has been inserted, the motor rotated and the gear train also rotated, slider (R) does not start operation yet.This is because the planetary gear mechanism is used and the carrier gear is locked by the slider mechanism. In this period, the planetary gear is in the loose condition.

2) When the sun gear is rotating and the carrier gear is locked, the planetary gear is running idle.

OPERATION DESCRIPTION

Slider (R)

Sun gear

Carrier gear's rib

Carrier gear

Planetary gear

Loose condition

Planetary gear

Loose condition

(3) Basic construction (Construction

of the trigger slider and slider (R))

The trigger slider is assembled with slider (R) and pushed in the direction of the arrow by the force of a spring.

(4) Operation of slider (R)

1) Activating the trigger slider When the trigger arm is rotated by the pressure of the disc, the trigger arm pushes the trigger slider.

2) Rotating (engaging) the planetar y gear When the trigger slider is moved, it pushes down the wall (section A) of the carrier gear .

Slider (R)

Tigger arm

Disc

Trigger slider

Spring

Trigger arm

Gear teeth on the traverse chassis

Carrier gear

(Initial rotation of the carrier gear)

This causes the planetary gear, which is attached on a pin of the carrier gear, to move according to the rotation of the carrier gear. When the planetary gear is meshed with a gear tooth (section B) of the traverse chassis , the planetary gear starts rotation. The rotation of the planetary gears causes the carrier gear to rotate.

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