Kenwood X-92403000, X-92444000 Service manual

2001-12 PRINTED IN JAPAN

B51-7867-00 (N)3417

CD MECHANISM ASSY

SERVICE MANUAL

X92-4030-0x X92-4440-0x

DESCRIPTION MECHANISM

X92-4030-00 (DXM-6000W) X92-4030-01 (DXM-6001W) X92-4030-02 (DXM-6002W) X92-4030-03 (DXM-6003W) X92-4030-04 (DXM-6004W) X92-4030-05 (DXM-6005W)

X92-4440-00 (DXM-6100W) X92-4440-01 (DXM-6101W) X92-4440-02 (DXM-6102W) X92-4440-03 (DXM-6103W) X92-4440-04 (DXM-6104W) X92-4440-05 (DXM-6105W)

outer-chassis

dumper (X4)

floating spring (X4)

traverse chassis assy

Mecha PCB

roller spring

roller lever assy

damper bracket

disc guide assy

CONSTRUCTION OF MAJOR PARTS

X92-4030-0x X92-4440-0x

NOTE FOR HANDLING MECHANISM ASSY

Trigger Lever

Pick is under the finger, it may touch.

Don’t touch the lever because the trigger lever comes off.

Don’t have the center of entrance because the disc insertion mouth is transformed.

OK OK

PICK UP

SPINDLE MOTOR

SLIDER ASSY

ROLLER

OK OK NG

• Don’t touch in the frame, since grease is applied to the parts.

• Don’t applied grease to the roller.

• Don’t touched PICK and SPINDLE MOTOR.

X92-4030-0x X92-4440-0x

Mother Board

DOUT 22

X1 /CLK 19

D.GND 4 DATA 18

Pick-Up

/MSTOP 10

IC1

IC2 /MRST 11

2 /MUTE L 12

/MUTE R 13

AB Q1 11

IC6

L-ch 8

Vref

R-ch 6

Ref Q3

A+5V

A.+8V

A.GND A.GND 7

IC4

5V Q2

2 Vref

Reg

D.GND

MUTE

DRVMUTE

Bu.+5V 15

Loding

D.GND 14

Sled L

Loe/Lim SW 1

S.GND

0-01Only

8Eje SW 17

12Eje SW 21

D.GND

Los SW 20

S7.5V

S.GND

Motor

Lo/Ej

RF Amp

Fo Coil

Servo Processor

MI-Com

1Chip IC

APC

Tr Coil

8V SW

Spindle Motor

Loading & Sled

Motor

Motor Driver

Vref

5V SW

SW +5V

Clock

16.93MHz

LPF

BLOCK DIAGRAM

COMPONENTS DESCRIPTION

Ref.No.

Application/Function Operation/Condition/Compatibility

IC1 CD-RW compatible RF amplifier

Generation of RF and servo error (focusing error, tracking error) signals based on the signals read from the APC circuit and pickup, detection of dropouts, anti-shock, track crossing and offtrack signals, and gain switching for CD-RW.

IC2 CD signal processor LSI + Mechanism u-COM

Focusing, tracking, sled and spindle servo processing, automated processing (focusing, tracking, gain, offset and balance), digital signal processing (DSP, PLL, subcode, CIRC error correction and audio data interpolation), Text function (MN662773kH2), and microcomputer function.

IC4 4-CH BTL driver

Drive of the focusing coil, tracking coil, sled motor and spindle motor, plus loading and ejection operations.

IC6 Audio active filter Secondary LPF

Q1 For APC (Auto Power Control) LD drive. Q2 Q3 SW ON when P-ON = "H" (when SW +5 V is ON). Q3 A.8V SW ON when P-ON = "H" (when Q2 is ON). Q4 D.5V SW ON when P-ON = "H" (when Q5 is ON). Q5 Q4 SW(P-ON) ON when P-ON = "H". D1 Pickup laser diode protection D2 D/A converter power supply diode A.8V → A.5V D3 For static protection D4 For forced gain boost (tracking servo)

●

CD PLAYER UNIT (X32-5170-0x/X32-5190-0x)

P-ON: Pin 82 of IC2.

X92-4030-0x X92-4440-0x

MICROCOMPUTER'S TERMINAL DESCRIPTION

●

Mechanism Microcomputer (IC2 : X32-5170-0x, X32-5190-0x)

Pin No. Name

I/O Description Processing Operation

1 BDO I Dropout signal input. H: Detected. Photodetector signal input 1. 2 OFT I Off-track signal input. H: Detected. Photodetector signal input 2. 3 /RFDET I RF detection signal input. H: Detected. Photodetector signal input 3. 4 VDET I Vibration detection signal input. H: Detected. Photodetector signal input 4. 5 LDON O Laser diode ON signal output. H: ON. Photodetector RF signal add input. 6 NC - No connection. RF amp filter terminal 1. 7 NC - No connection. RF amp filter terminal 2. 8 AVSS3 I Analog circuit GND.

9 AVDD3 I Analog circuit power supply. 10 FBAL O Focusing balance adjustment output. Laser diode monitor input. 11 TBAL O Tracking balance adjustment output. Laser diode drive output. 12 FE I Focusing error signal input (D/A input). 13 NC - No connection. Tracking filter terminal 1. 14 NC - No connection. Tracking filter terminal 1. 15 TE I Tracking error signal input (analog input). 16 NC - No connection.

Track cross comparator filter terminal. 17 NC - No connection. 18 NC - No connection. RF signal input (for RF detection). 19 RFENV I RF envelope signal input. 20 VREF I VREF input. 21 ARF I RF signal input (for DSL). 22 DRF I DSL bias terminal. 23 DSLF I/O DSL loop filter terminal. 24 IREF I Reference current input. 25 PLLF I/O PLL loop filter terminal. 26 PLLF2 I/O PLL loop filter characteristic switching terminal. 27 VCOF I/O VCO loop filter terminal. 28 VCOF2 I/O

Digital servo 33.8688 MHz generation (VCO loop filter terminal). 29 TRV O Traverse forced feed output. 30 TVD O Traverse drive output. 31 PC O Spindle motor ON output. L: ON. 32 ECM O

Spindle motor drive output (forced mode output) (D/A output). 33 ECS O Spindle motor drive output (servo error signal output). 34 KICK O Kick pulse output. 35 TRD O Tracking drive output. 36 FOD O Focusing drive output. 37 TOFS O Tracking offset adjustment output. 38 AVDD2 I

Analog circuit power supply (for DSL, PLL, AD and DA circuits). 39 AVSS2 I Analog circuit GND. 40 DVSS2 I Digital circuit GND.

41 EFM or CK384 O EFM signal output.

When command is executed:

16.9344 MHz clock output.

42 PCK or DSLB O PLL sampling clock output.

When command is executed:

DSL balance output. 43 /CLDCK O Subcode frame clock signal output. 44 FCLK O X'tal frame clock signal output. 45 IPFLAG O Interpolation flag signal output. H: Interpolated. 46 FLAG O Flag signal output. 47 TRCRS I Track crossing signal input. Track crossing signal output. 48 STOUT O

Serial data output for monitor signal (OFT, VDET, BDO, RFDET, etc.) 49 STLD O Load signal output for monitor signal. 50 SMCK O Bit clock signal output for monitor signal.

X92-4030-0x X92-4440-0x

MICROCOMPUTER'S TERMINAL DESCRIPTION

Pin No. Name

I/O Description Processing Operation

51 CSEL I

X'tal oscillation frequency selection terminal, which is fixed at L.

H: 33.8688 MHz. L: 16.9344 MHz. 52 TEST1 I Test pin 1. Fixed at L (normal position). 53 TEST2 I Test pin 2. Fixed at L (normal position). 54 IOSEL I

Audio DAC external data input mode selection terminal. 55 /NRST I Reset input. L: Reset. 56 BCLK O SRDATA bit clock output. 57 LRCK O L/R identification signal output. 58 SRDATA O Serial data output. 59 SUBC O Subcode serial output. 60 SBCK I Subcode serial output clock input. 61 DQSY O CD-TEXT read permission signal output. 62 DEMPH O De-emphasis detection signal output. H: ON. 63 TX O Digital audio interface signal output. 64 SRDATAIN I SRDATA input/test terminal. 65 LRCKIN I LRCK input/SMCK output frequency switching. 66 BCLKIN I BCLK input. When not used: VDD. 67 DVDD1 I Digital circuit power supply. 68 X1 I X'tal oscillator input terminal. 69 X2 O X'tal oscillator output terminal. 70 DVSS1 I Digital circuit GND. 71 XSUB1 I Microcomputer clock input terminal. 72 XSUB2 O Microcomputer clock output terminal. 73 DVDD2 I Digital circuit power supply. 74 NC O No connection. 75 NC O No connection. 76 73/74SEL I 73/74 selection port. 77 DRV_MUTE O Driver muting control terminal. 78 NC O No connection. 79 NC O No connection. 80 TEST I Test mode switching terminal. 81 ASEL I Audio output polarity detection terminal. 82 PON O Audio/digital power supply control terminal. 83 SEARCH O Servo IC gain switching control terminal. 84 EQCNT O RF amp double-speed switching control terminal. 85 SW3 I Limit switch detection terminal. 86 /MUTE_L O L-CH analog muting control terminal. 87 /MUTE_R O R-CH analog muting control terminal. 88 CD_RW O CD-RW control terminal. 89 /RST I System reset input terminal. 90 MECHASEL I 6000/6010 selection port. L=6000 H=6010 91 /MSTOP I Standby detection terminal. 92 LDCNT O LD control terminal. 93 DATA I/O

I2C bus data line (communication line with System controller). 94 /CLK I/O

I2C bus clock data line (communication line with System controller). 95 HOT I Temperature protection detection terminal. 96 VREF+ I A/D converter + power supply. 97 OUTR O R-channel audio output.

98 AVDD1 I

Analog circuit power supply (for audio output circuits of

both L and R channels).

99 OUTL O L-channel audio output.

100 AVSS1 I

Analog circuit GND (for audio output circuits of both L

and R channels).

X92-4030-0x X92-4440-0x

Center

of rotation

Projection

Disc

8cm Disc

Trigger arm

Disc

Trigger arm

Position pushed by the disc

Switch ON!

Disc arm(L)

Disc arm(R)

Disc

Claw (A)

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.

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 prevent the disc from dropping in this case, the claw is provided with a projection for supporting the disc.

Worm gear Motor

Rubber rollers

Disc IN

Side view

Disc guide

Roller

Disc IN

Disc OUT

Dis

Clamper chassis

+ 12 hidden pages