Kenwood KD-CD-301 Service Manual

CD PLAYER

KDC-D301

SERVICE MANUAL

B51-7765-00(S) 3165

ESCUTCHEON (B07-2188-02)

DIGITAL OPTMUM

SERVO CONTROL

PLASTIC CABINET ASSY (A02-1486-13)

PANEL ASSY (A64-2366-02)

CD PLAYER

60 120 250 380 500 750 1k 2k 4k 8k 16k

KDC-D301

MOUNTING HARDWARE ASSY (J21-9491-13)

FRONT GLASS (B10-4055-02)

LEVER x 2 (D10-3031-04)

INTEGRATED QUAD 1BIT D/A

CONVERTER

11BAND

SPECTRUM ANALYZER

KNOB (K24-1923-14)

DISP

DPAC

STAY (J54-0606-04) : K TYPE ONLY

CUSHION (G11-1860-05)

DC CORD (E30-4730-05)

SCREW SET (N99-1632-05) : K TYPE ONLY

SCREW SET (N99-1656-05) : K TYPE ONLY

KDC-D301

BLOCK DIAGRAM .............................................................. 2

COMPONENT DESCRIPTION ........................................... 3

MICROCOMPUTER’S DESCRIPTION............................... 5

PC BOARD ......................................................................... 7

BLOCK DIAGRAM

CH CORD

B.U.

CN1

B.U. DET

Q1,2

BU +5V

Q17

SW 14V

Q3,4

AUDIO +B

Q5,6

ILL +B

to H.U.

(X25- )

CN3

L CH

Q19

SW 5V

R CH

13PIN

Q14,15,20

AUDIO MUTE

IC1

B.U.DET

VDD AVDD

P ON

CH CON

SCHEMATIC DIAGRAM ................................................... 13

EXPLODED VIEW ............................................................ 19

PARTS LIST...................................................................... 21

SPECIFICATIONS ...............................................Back cover

SP INPUT

CN2

A MUTE

SYSTEM MI-COM

DATA H

DATA C

CH CLK

P KEY

REQ H

REQ C

CH CON

EJECT

CH RST

RESET SW

RESET

CH MUTE

BEEP

BPF IN

BPF SEL

BPF A BPF B BPF C

IC2 Q16

CLOCK

4.19MHz

Q13

BUZZ

4PIN

IC5

ISO AMP

IC6 (1/2)

AGC AMP

IC7

B.P.F.

IC6 (2/2)

VREF

Q7,8

SERVO +B

Q10

CN1

(X89- )

LCD AVR

DIMMER SW

PAN 5V SW

PAN 5V

PANEL

IC1

LCD DRIVER

ED1

LCD

CN4 22PIN

EJECT

(X92- )

SCL

SDA

BU 5V

L CH

AUD +B

SERVO +B

R CH

SW1

SW2

SW3

MUTE L

RST

STOP

MUTE R

LO/EJ

MO SW

PAN 5V

DISP

CD MECHANISM

ILL +B

(X13- )

L CE

L INH

L DATAL

CN5

16PIN

L CLK

KDC-D301

COMPONENT DESCRIPTION

● SWITCH UNIT(X16-110X-XX)

Ref.No. Component Name Application/Function Operation/Condition/Compatibility

IC1 LC75823W LCD driver

Q1 2SC4081 Dimmer SW

● ELECTRIC UNIT(X25-8902-71)

Ref.No. Component Name Application/Function Operation/Condition/Compatibility

IC1 UPD780058GC255 System MI-COM. IC2 S-80830ANNP Reset IC

IC5 NJM4565M-TE2 Isolation amp. IC6 NJM4565M-TE2 1/2 VCC & A.G.C.amp. IC7 BA3834F BPF IC

Q1 2SC4081 Q2 2SA1870 or 2SB1450 Q1 and Q2 are inverted Darlington connection. Q3 2SC4081 Q4 2SB1202 Q5 2SC4081 Q6 2SB1202 Q7 2SC4081 Q8 2SB1202

Q9 2SC4081 BU detection SW

Q10 2SA1037K Panel 5V SW

Q11 2SC4081

Q12 DTA143EUA Changer mute SW Q13 DTC144EUA or UN5213 Buzzer SW When a base goes "Hi", Buzzer is turned on.

Q14 DTC343TK Audio mute SW(L Ch) When a base goes "Hi", Audio mute is activated. Q15 DTC343TK Audio mute SW(R Ch) When a base goes "Hi", Audio mute is activated.

Q16 DTC144EUA or UN5213 Changer reset SW

Q17 UMC2N SW 14V

Q18 DTC144EUA or UN5213 BU detection inverter Q19 UMC2N SW 5V

Q20 UMC2N Audio mute driver Q21 2SD2114K AGC Signal level control

Q22 DTC144EUA or UN5213 Changer control SW Q23 2SA1037K

Q24 DTC144EUA or UN5213 Switch Unit.

BU 5V AVR

Audio +B AVR While Q3's base goes "Hi", AVR outputs +8.0V.

Illumination +B AVR While Q5's base goes "Hi", AVR outputs +10.5V.

Servo +B AVR While Q7's base goes "Hi", AVR outputs +8.0V.

Guide or Eject illumination SW

LED +B SW

When Q1's base goes "Hi", Dimmer LEDs are turned on.

When BU 5V voltage is less than 3.0V, IC outputs "Lo".

While BACKUP is applied, AVR outputs +5V.

While BACKUP is applied, a base goes "Hi", and Q12 is turned on. When momentary power down has detected, a base goes "Lo", and Q12 is turned off. When a base goes "Lo" during panel closed, Q10 is turned on. When a base goes "Hi", Guide or Eject illumination LED is lighting-up. When CHANGER MUTE REQUEST to H/U is worked, a base goes "Lo" and Q12 is turned on.

When CHANGER RESET from H/U is worked, a base goes "Hi" and Q19 is turned on. Audio +8V AVR, Illumination +B AVR, Servo +B AVR on/off control When a base goes "Hi", Q17 is turned on, and Each AVR are working.

CD MECHA. SW, BPF IC on/off control When a base goes "Lo", Q19 is turned on, and Each circuits are working. When a base goes "Hi", Audio mute driver outputs "Hi".

When CHANGER CONTROL from H/U goes "Hi", Q15 is turned on. When Q23's base goes "Hi", BU 5V is supplied to the

KDC-D301

COMPONENT DESCRIPTION

● CD PLAYER UNIT(X32-5010-00)

Ref.No. Component Name Application/Function Operation/Condition/Compatibility

Generation of RF signal based on the signals from

IC1 AN22000AA RF amplifier

IC2 MN662774KG1

IC4 BA5917AFP 4CH BTL driver IC6 NJM4565MD OP Amp. Low pass filter

Q1 MCH6101 APC LD power control Q2 DTC124EUA P ON SW

Q3 DTA143XUA A.8V SW

Q4 2SA1362(Y) D.5V SW

Q5 DTC124EUA MOTOR SW

CD signal processor bult-in MI-COM.

the APC circuit and pickup, and generation of servo error(focusing error and tracking error)signals. Detection of dropout, anti-shock, track crossing and off-track conditions, Gain control function building in.

Focusing coil, tracking coil, spindle motor and sled motor driver

When CD source is selected, Q2's base goes "Hi", Q3 and Q4 are turned on. A8V ON/OFF control. When a base goes "Lo", Q3 is turnde on. D5V ON/OFF control. When a base goes "Lo", Q4 is turnde on. When CD loading or eject operation is activating, Q5's base goes "Hi", Q4 is turned on.

KDC-D301

MICROCOMPUTER'S DESCRIPTION

IC1 (ELECTRIC UNIT: X25-8902-71)

● Terminal Description

Pin No.

8-10 NC O Not used(N.C.)

30,31 NC O Not used(N.C.)

Pin Name I/O Description Processing Operation

1 EJECT I Eject key input "Lo": Eject key pressed 2 REF CON O A/D converter reference voltage control output "Hi": Reference voltage supplying 3 NC O Not used(N.C.) 4 AVSS - A/D, D/A converter ground connection terminal Connected to ground lines. 5 NC O Not used(N.C.) 6 NC O Not used(N.C.) 7 AVREF1 - D/A converter reference voltage input terminal Connected to BU 5V lines.

11 DATA H I Data input from H/U 12 DATA C O Data output to H/U 13 CH CLK I/O Clock input/output with H/U New type: Input, Previous type: Output 14 REQ C O Communication request to H/U "Lo": Communication request 15 NC O Not used(N.C.) 16 P KEY I Key data input from LCD driver IC 17 L DATA O Data output to LCD driver IC 18 L CLK O Clock output to LCD driver IC 19 NC O Not used(N.C.) 20 NC O Not used(N.C.) 21 MSTOP O Stop request to CD mechanism MI-COM. "Lo": Stop mode, "Hi": Operation mode 22 L INH O INH output to LCD driver IC "Lo": Display lighting-up, "Hi": Display lighting -out 23 L CE O CE output to LCD IC "Hi": Data communication 24 DIMMER O Dimmer output "Lo": Dimmer mode, "Hi": Except dimmer mode 25 NC O Not used(N.C.)

26 BPF SEL O BPF IC control output (SEL,A,B,C)=("Lo",X,X,X)..................GND

27 BPF A O BPF IC band control output A

28 BPF B O BPF IC band control output B

29 BPF C O BPF IC band control output C

32 G ILLUMI O Disc indicator control output 33 VSS1 - Ground connection terminal Connected to ground lines.

34 TYPE1 I Destination selection terminal 35 NC O Not used(N.C.)

36 SDA I/O Data input/output with CD mechanism MI-COM. 37 SCL I/O Clock input/output with CD mechanism MI-COM. 38 NC O Not used(N.C.) 39 CH MUTE O Audio mute request to H/U "Lo": Mute request 40 MUTE O Audio mute control output "Hi": Audio mute on, "Lo": Audio mute off 41 NC O Not used(N.C.)

42 PON O Peripheral circuits AVR control output 43 NC O Not used(N.C.)

44 BEEP O Beep output 45 MRST O Reset output to CD mechanism MI-COM. "Lo": CD mechanism MI-COM. reset 46 CD MUTE I Mute request input from CD mechanism MI-COM. "Lo": Mute request 47 EJ BUP I OR input (EJECT key, B UP inverter signal) 48 NC O Not used(N.C.) 49 MOTOR O CD mechanism loading motor control output "Hi": CD loading/eject action or Break, "Lo": other 50 LOEJ I/O CD mechanism loading/Eject switching output "Lo": Loading, "Hi": Eject, "Hi-Z": Stop or Break

(SEL,A,B,C)=("Hi","Lo","Lo","Lo")......GND

(SEL,A,B,C)=("Hi","Lo","Lo","Hi") ...... 68Hz

(SEL,A,B,C)=("Hi","Lo","Hi","Lo") ...... 170Hz

(SEL,A,B,C)=("Hi","Lo","Hi","Hi") ....... 420Hz

(SEL,A,B,C)=("Hi","Hi","Lo","Lo") ...... 1kHz

(SEL,A,B,C)=("Hi","Hi","Lo","Hi") ....... 2.4kHz

(SEL,A,B,C)=("Hi","Hi","Hi","Lo") ....... 5.9kHz

(SEL,A,B,C)=("Hi","Hi","Hi","Hi") .......14.4kHz

"Hi": Indicator lighting-up, "Lo": Indicator lightingout

J type : Pull down to ground lines K,E type: Pull up to BU 5V lines

"Hi": A.+8V AVR, ILL +B AVR , SERVO +B AVR and BPF IC are turned on.

KDC-D301

MICROCOMPUTER'S DESCRIPTION

Pin No.

Pin Name I/O Description Processing Operation

51-59 NC O Not used(N.C.)

60 RESET I Reset input "Lo": System reset 61 REQH I Communication request from H/U "Lo": Communication request 62 COMM SW I 5-line communication previous/new switch input "Lo": New type, "Hi": Previous type

63 SW2 I 12cm disc detection terminal(8cm/12cm) 64 SW1 I Loading detection (Loading start) "Lo": Loading start

65 FLIP SW I Panel tilting detection input "Hi": Panel tilted or detached, "Lo": Panel closed 66 CHCON I Changer control input from H/U "Hi": Standby mode, "Lo": Operation mode 67 VSS0 - Ground connection terminal Connected to ground lines. 68 VDD1 - Positive power supply connection terminal Connected to BU 5V lines. 69 X2 - Main clock resonator connection terminal 70 X1 I Main clock resonator connection terminal 71 IC(VPP) - Not used(connected to ground lines) 72 XT2 - Sub clock resonator connection terminal Not used(N.C.) 73 XT1 I Sub clock resonator connection terminal Not used(connected to BU 5V lines) 74 VDD0 - Positive power supply connection terminal Connected to BU 5V lines. 75 AVREF0 I A/D converter reference voltage input terminal Connected to REF CON terminal 76 BPF IN I Level detection input from BPF IC out 77 ILLUMI ON O ILL+B AVR control output "Hi": AVR ON, "Lo": AVR OFF 78 NC O Not used(N.C.) 79 SW3 I Down & limit switch detection input "Hi": Chucking, "Lo": Pickup most inner position

80 B UP I Momentary power down detection input

When 12cm disc is detected, the input becomes "Lo" temporarily. (Watched in SW1 "Lo")

"Hi" : When momentary power down detected or BU OFF "Lo" : BU ON

+ 14 hidden pages

Kenwood KD-CD-301 Service Manual

CONTENTS

BLOCK DIAGRAM

COMPONENT DESCRIPTION

MICROCOMPUTER'S DESCRIPTION