Kenwood KD-CX-879 Service Manual

CD RECEIVER

KDC-X879

SERVICE MANUAL

Panel assy (A64-3227-01)

CD mechanism extension cord (24PIN) : W05-0935-00

Escutcheon (B07-3079-01)

Lever (D10-4674-04) x 2

Mounting hardware assy (J21-9823-03)

Screw set (N99-1723-05)

Screw set (N99-1734-05)

Plastic cabinet assy (A02-2731-13)

Remote controller assy (A70-2040-05) : RC-505

Panel assy (A64-3249-02)

DC cord (E30-6294-05)

Size AA Battery

(Not Supplied)

TDF PANEL INFORMATION MODEL PARTS NO. PANEL NAME KDC-X879 Y33-1790-60 TDF-M9000

KDC-X879

BLOCK DIAGRAM

(X34- )

TUNER

AUDIO OUT

S-METER

BU5V

Q501

EEP5V

IC1

EEPROM

TDF UNIT (X16-208)

DISPLAY

UNIT

(X16-253)

SWITCH UNIT

(X16-256)

Q303,304

AM+B

BU5V 8V SERVO CD4.7V

BACK UP

IC9

REMO

8V 8V

BUFFER

IC14

RDS DECODER

EEPROM

SW5V

IC7

LEVEL SHIFT

IC11

u-COM

ROT ARY ENCODER

SW5V

LEVEL SHIFT

IC8

BU5V

IC2

IC4

IC10

KEY

KEY MATRIX

BPF

SW5V

IC1

2.5V

MASK ROM

FLASH ROM

BPF

AGC

BUFFER

LEDLED

ILL+

AGC

RESET SW

IC2

FM AM CD

E-VOL

MPX

QUAL

SYSTEM MICROPROCESSOR

PANEL5

Q6,10

PANEL SW5V

IC6

3.3V

SW3.3V

FL3.3V

Q2,3

FL+B

KEY ILL

IC15

MOTOR

FL+B

FAC

IC5

SYSTEM E'S+

IC20

FOCUS SW

IC8

SERVO

PANEL MECHA

SW5V

DC/DC

WOW

RESET

IC16

MOTOR DRDR

IC6

BU5V

IC9

MUTE DRIVER

Q207,208

PRE MUTE

Q203,204

PRE MUTE

Q205,206

PRE MUTE

IC4

POWER IC

BU5V

IC18

Q23,24

ANT-CON ANT CON

Q25

EXT AMP

Q26

DIMMER DIMMER

TEL MUTE

Q29

ACC DET

Q27

B.U DET

BU5V

SW5V

PANEL5V

SW14V

DC/DC A8V

SERVO

CD4.7V

IC13

IC12

IC11

P-CON P CON

Q1,2

BU5V

Q3,601

SW 5V

Q502,503

PANEL 5V

Q4,5

SW 14V

Q6-8

A8V

Q9,602

SERVO

Q11-14

FL+B

IC19

SW REG

OP AMP

AUX IN

PRE OUT (SUB WOOFER)

PRE OUT (REAR)

PRE OUT (FRONT)

SP OUT (FL) SP OUT (FR) SP OUT (RL) SP OUT (RR)

WIRED REMO/ OPEL DISP I/F

EXT.AMP.CON

TEL MUTE

ACC

BACK UP

BLOCK DIAGRAM

KDC-X879

CD PLAYER UNIT (X32-5560-00/0-01) (X32-5590-00/0-01)

CN1

DOUT

OPEN

LOS

CLK

A8V

BU5

S7V

A8V

AGND

(0-01)ONLY

DGND

SGND

12EJE

DATA

AGND

MUTER

MUTEL

MRST

MSTOP

8EJE

LOE/LIM

DGND

LO/EJ

MOTOR

SGND

Q3,5,6

DGND

BU5V

D5V

Q1,4

LEVEL SHIFT

BU3.3V

LEVEL SHIFT

IC5

3.3V REG

DGND

S7V

DGND

IC1

PON

A8V

u-COM

IC14

5V REG

AGND DGND

AUDIO FILTER UNIT

DAC

A5V

IC10

IC4

DGND

AGND

3.3V/2.5V REG

SW3.3V

DMUTE

MOTOR DRIVER

BU3.3V

SGND

BU3.3V

SDO

IC15

BU5V

DGND

IC3

MP3/WMA DECODER

16.00MHz

BU2.5V

FCS TRK

SPD SLD

C-SW

IC2

DGND DATA

DGND

SERVO DSP (DAC,RF AMP)

16.898MHz

SW3.3V

Q10

C-SW

516

VREF

APC

CN2

DPU1 (PICKUP)

SPINDLE MOTOR

SLED & LOADING MOTOR

TR COIL

FO COIL

COMPONENTS DESCRIPTION

● SUB CIRCUIT UNIT (X16-2080-10)

Ref No. Application / Functions Operation / Condition / Compatibility

IC1 E2PROM E2PROM for security

● DISPLAY UNIT (X16-2530-11)

Ref No. Application / Functions Operation / Condition / Compatibility

IC1 Panel microprocessor Panel control microprocessor IC2 ROM IC Graphic ROM IC4 AVR For 3.3V power supply IC5 AVR For 2.5V power supply IC6 Buffer IC Level shift buffer IC (5V→3.3V) IC7 Buffer IC Level shift buffer IC (3.3V→5V) IC8 Remote control IC For Remote control sensor IC9 Logic IC Control for FL contrast IC10 Analog IC Spectrum analyzer IC

KDC-X879

COMPONENTS DESCRIPTION

Ref No. Application / Functions Operation / Condition / Compatibility

Q1 3.3V Regulator While PAN5V is applied when 3.3V regulator output is +3.3V Q2 2.5V Regulator While PAN5V is applied when 2.5V regulator output is +2.5V Q3,4 FL +B SW FL +B (VDD1) is turned on when Q3 base level goes H Q5 3.3V SW SW3.3V is turned on when Q5 base level goes L Q6,200 FL 3.3V SW FL +3.3V (VDD1) is turned on when Q200 base level goes H Q7,8 Remote control ON SW The power supply of IC8, 10 is turned on when Q10 base level goes H Q9 FL BLK SW VFD is turned on when Q9 base level goes H Q11 Red LED SW Red LED is turned on when Q11 base level goes H

● SWITCH UNIT (X16-2560-10)

Ref No. Application / Functions Operation / Condition / Compatibility

Q1 DSI LED SW DSI LED blinks when Q1 base level goes H/L Q2 KEY Illumination SW (Green) KEY Illumination SW “ON” when the Q2 base level goes H Q3 KEY Illumination SW (Red) KEY Illumination SW “ON” when the Q3 base level goes H Q4 KEY Illumination SW (Blue) KEY Illumination SW “ON” when the Q4 base level goes H

● CD PLAYER UNIT (X32-5590-00)

Ref No. Application / Functions Operation / Condition / Compatibility

IC1 Mechanism control microprocessor IC2 DSP CD signal processor, RF amp, Servo control IC3 Decoder IC MP3/WMA decoder IC4 BTL driver Focus, Tracking coil, Feed and Spindle motor driver IC IC5 AVR SW3.3V AVR IC10 Audio DAC IC13 LPF Audio LPF IC14 AVR A 5.0V AVR IC15 AVR BU3.3V & BU2.5V AVR Q1,4 Level shift FET Level shift (3.3V - 5.0V) Q3,5 Level shift TR Level shift (3.3V - 5.0V) Q6 Level shift TR Level shift (3.3V - 5.0V) Q7 Level shift TR Level shift (3.3V - 5.0V) Q8,11,12 APC Auto power control & A 5V constant current circuit Q9,10 Switching TR Sub beam delay control switch

● ELECTRIC UNIT (X34-3030-11)

Ref No. Application / Functions Operation / Condition / Compatibility

IC1 System control IC System control microprocessor IC2 E-VOL & tuner IC E-VOL. FM/AM tuner & stereo decoder IC3 Power supply IC For A8V AVR IC4 Audio power IC Audio power amplifier

KDC-X879

COMPONENTS DESCRIPTION

Ref No. Application / Functions Operation / Condition / Compatibility

IC5 System IC For System E’s control IC6 Audio control IC For WOW/FOCUS control IC7 Power supply IC -9V AVR (For 4.5V Pre-out) IC8 Reset IC When BU5V line voltage is less than 3.5V, this IC output line is “L” IC9 Muting logic IC Control for MUTE, P-ANT & RESET muting IC10 Buffer IC For spectrum analyzer IC11~13 OP AMP For 4.5V Pre-out IC14 RDS decoder Decode for RDS signal IC15,16 Motor driver Control for Panel mechanism motor IC18 P-CON IC Power control IC IC19 Power supply IC Switching regulator IC for CD4.7V IC20 Analog SW Control for WOW/FOCUS IC (IC4) Q1,2 BU 5V AVR While BU is applied when BU5V regulator output is +5V Q3,601 SW5V AVR When Q601base level goes H, SW5V regulator output is +5V Q4,5 SW14V AVR When Q5 base level goes H, SW14V regulator output is +14V Q6~8 Audio 8V AVR When Q6 base level goes H, A8V regulator output is +8.3V Q9,602 Servo +B AVR When Q602 base level goes H, S+B regulator output is +7.5V Q11~14 Illumination & DC/DC +B AVR When Q11 base level goes H, AVR output is +9.2V Q15,16 Audio 10.5V AVR When Q16 base level goes H, AVR output is +10.5V

Q17~19 Pre Amp & -9V AVR

Q20~22 Pre Amp & +9V AVR

Q23,24 P-ANT SW When Q23 base level goes H, P-ANT SW output is +14V Q25 Buffer EX amp control buffer Q26 Small lamp det. SW When Q26 base level goes H, Q26 turned ON Q27 BU detector When Q27 base level goes H, Q27 turned ON Q29 ACC detector When Q29 base level goes H, Q29 turned ON Q30,31 Muting driver When base level goes L, muting driver is turned ON Q201 Buffer Noise detect buffer amp Q202 E-VOL muting SW When Q202 base level goes H, muting SW is turned ON Q203~208 Q210 AGC For AGC for spectrum analyzer Q303,304 AM +B SW When Q303 base level goes H, AM +B is out to tuner unit Q305 Buffer Composite signal buffer for RDS Q501 E2P 5V SW When Q501 base level goes L, E2P 5V is out for E2PROM Q502,503 Panel 5V SW When Q503 base level goes H, Panel 5V is out Q603 SW When Q603 base level goes H, Q603 is turned ON

Pre-out muting SW When base level goes H, Pre-output is muted

Q18,19 work as differential amplifier, Q17 wark as driver and -9.1V is supplied to OP AMP for Pre-out Q20,22 work as differential amplifier, Q21 wark as driver and +9.4V is supplied to OP AMP for Pre-out

KDC-X879

MICROCOMPUTER’S TERMINAL DESCRIPTION

● SYSTEM MICROPROCESSOR : UPD703030GC041 (X34-303 : IC1)

Pin No. Pin Name I/O Description / Processing Operation

1 PLL DATA I/O Data input/output terminal for Tuner front-end 2 AM+B I/O AM+B (AM operation : H) 3 (FM+B) O FM+B (FM operation : H, Last FM : H with RDS, RBDS model) 4PAN E2P DATA I/O Variable illumination D/A converter, E2PROM DATA terminal 5PAN E2P CLK I/O Variable illumination D/A converter, E2PROM CLK terminal 6 EVDD - VDD 5V 7 EVSS - GND 8 AFS O Time constant switching for noise detection (FM seek, AF search, AUTO 0 : L, Receiving : H) 9 BEEP O BEEP audio output terminal 10 REMO I Remote control input terminal 11 P MUTE O Audio power IC muting control terminal (POWER OFF, ALL OFF, TEL MUTE : L) 12 SVR O Audio power IC SVR discharge circuit control terminal 13 IC2 SDA I/O CD mechanism, IC2, IC5, ROM correction DATA line 14 IC2 CLK I/O CD mechanism, IC2, IC5, ROM correction CLOCK line 15 P STBY O Audio power IC Stand-by terminal (POWER IC ON, ALL OFF : H, POWER IC OFF : L) 16 P CON I/O Power control terminal (POWER ON : H, POWER OFF, ALL OFF : Hi-Z) 17 WOW MODE2 O WOW control terminal 1 18 TEST - NC (GND) 19 DIAG I Over voltage/Over current detection terminal (Normal : H, Bad condition : L) 20 MUTE O MUTE output terminal (ON : OPEN, OFF : L) 21 PRE MUTER O PREOUT (Rch) muting control terminal 22 PRE MUTEL O PREOUT (Lch) muting control terminal 23 BU DET I 24 ACC DET I ACC detection terminal (With ACC : L, Without ACC : H) 25 FOCUS I/O WOW/FOCUS control terminal (FOCUS HI : H, FOCUS LOW : L) 26 EXT AMP CONT O External amplifier control terminal 27 DIMMER I Small lamp detection terminal (ON : L, OFF : H) 28 29 P ON I/O SW14V, SW5V control terminal (POWER ON : H, POWER OFF : Hi-Z) 30 ILL ON I/O FL, illumination control terminal (ON : H, OFF : Hi-Z) 31 RESET I Reset input terminal 32,33 XT1/XT2 - Sub clock (32.768KHz) 34 REGC - Connect to 1µF capacitor 35,36 X2/X1 - Main clock (20MHz) 37 VSS - GND 38 VDD - AVR 5V 39 CLKOUT - NC 40 LX REQ M O Communication request to external slave unit (Request : L) 41 LX MUTE I Mute request from external slave unit (MUTE : H)

ANT CONT(TYPE2)

Momentary power dropped detection terminal (No Backup, Momentary power dropped : H, Backup : L)

I/O Antenna control/Destination select terminal (TUNER ON : H)

Fig.

KDC-X879

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Description / Processing Operation

42 LX CON O External slave unit (ON : H, OFF : L) 43 LX RST O Reset output to external slave unit (Normal : L, After system reset : H 400ms or more and then L) 44 CD MECHA+B O CD4.7V output terminal (CD : H, Except CD source : L) 45,46 TYPE0/TYPE1 I Destination select terminal 47,48 49 PAN5V O Panel 5V control terminal (ON : H, Momentary power dropped : Hi-Z) 50 E2P5V I/O E2PROM, D/A converter power supply control terminal (ON : L, OFF : Hi-Z) 51 DSI I/O DSI control (ON : L, OFF : Hi-Z) 52 MC REQ O Communication request to panel microprocessor 53 PAN RST O Reset output to panel microprocessor (Normal : H, Reset, Momentary power dropped : L) 54 WOW MODE3 O WOW control terminal 1 55 DVDD - AVR 5V 56 DVSS - GND 57 SC CON O Panel microprocessor control terminal (POWER OFF, ACC OFF : L) 58 M RST O Reset output to CD mechanism (Normal : H, Reset : L) 59 M STOP O Stop request to CD mechanism (STOP : L, CD : H) 60 CD SW3 I CD DOWN SW detection terminal (CD disc chucking : H) 61 LO/EJ I/O CD mechanism loading/ eject selector (STOP, Brake : Hi-Z, LOADING : L, EJECT : H) 62 MOSW O CD mechanism motor driver SW (LOADING, EJECT, Brake : H) 63 FPM MOTOR B O FPM mechanism (Slider) control terminal 2 64 FPM MOTOR F O FPM mechanism (Slider) control terminal 2 65 FPM MOTOR O O FPM mechanism (Angle) control terminal 2 66 FPM MOTOR C O FPM mechanism (Angle) control terminal 2 67 O DATA I/O External display DATA terminal 2 68 O CLK I/O External display CLK terminal 69 O CE I/O External display chip enable terminal 70 M MUTER I Mute request from CD mechanism (Rch ON : L) 71 AVDD - AVR 5V 72 AVSS - GND 73 AVREF I Connect to P-ON (29PIN) 74 M MUTEL I Mute request from CD mechanism (Lch ON : L) 75 PAN DET I PANEL, E2PROM detection terminal (With panel : L, Without : H) 76 PHONE I PHONE detection terminal (TEL MUTE : 1V or less, NAVI MUTE : 2.5V or more)

77 FPM SW4 I

78 FPM SW1 I FPM mechanism position detect terminal 2 79 FPM SW2 I FPM mechanism position detect terminal 2 80 FPM SW3 I FPM mechanism position detect terminal 2 81 FPM PHOUT I FPM mechanism position detect terminal (2.2V or more : H) 2 82 S METER I S meter detection terminal

IC2 TYPE0/TYPE1

I IC2 destination select terminal

FPM mechanism position detect/ CD Mechanism detection terminal (3.75V or more : No mechanism, 1.25V or more : H, Less than 1.25V : L)

Fig.

KDC-X879

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Description / Processing Operation

83 NOISE I FM noise detection terminal 84 IFC OUT I Front end IFC OUT input terminal (Receiving station : 2.5V or more) 85 POWER DET I Audio power IC DC offset detection 86 CD SW4 I 8cmDISC detection terminal (8cmDISC : L) 87 R CLK I RDS decoder clock input terminal 88 LX REQ S I Receive request from external slave unit (Request : L) 89 SC REQ I Communication request from panel microprocessor 90 CD SW1 I LOADING SW detection terminal (LOADING start, POWER OFF : L) 91 CD SW2 I 12cmDISC detection terminal (12cmDISC, POWER OFF : L) 92 R QUAL I RDS decoder QUAL input terminal 93 R DATA I RDS decoder DATA input terminal 94 LX DATA S I Data input from external slave unit 95 LX DATA M O Data output to external slave unit 96 LX CLK I/O Clock input/ output with external slave unit 97 PAN RX I Data input from panel microprocessor 98 PAN TX O Data output to panel microprocessor 99 WOW MODE1 O WOW control terminal 100 PLL CLK I/O Clock input/ output to Tuner front-end 1

Fig.

Fig.1 WOW mode operation

MODE WOW MODE1 WOW MODE2 WOW MODE3 FOCUS BYPASS L L L Don’t care TuBass L H L Don’t care 3D-STEREO L L H Don’t care FOCUS LOW H L L L (Hi-Z) FOCUS HI H L L H WOW LOW H H H L (Hi-Z) WOW HI H HHH

Fig.2 FPM motor control

SLIDE FPM mechanism

FPM MOTOR B FPM MOTOR F operation

LLStandby HLBackward operation LHForward operation HHBrake

FPM MOTOR O FPM MOTOR C operation

LLStandby

HLAngle open direction

LHAngle close direction

HHBrake

ANGLE FPM mechanism

MICROCOMPUTER’S TERMINAL DESCRIPTION

● PANEL MICROPROCESSOR : 703132GJ011-A (X16-253 : IC1)

Pin No. Pin Name I/O Description / Processing Operation

1~7 D14~D8 I/O External ROM data input/output terminal

8 3.3VDD - AVR 3.3V

9 VSS - GND

10~17 D7~D0 I/O External ROM data input/output terminal

18 FL GCP1 O FL bright control terminal

19 SC REQ O Communication request to system microprocessor (H : Request)

20 MC REQ I Request from system microprocessor (H : Request)

21 SC CON I Panel microprocessor control (H : While operation)

22 FL BLK O Display control SW for FL driver (H : Display ON, L : Display OFF)

23 2.5V VDD - AVR 2.5V

24 VSS - GND

25~27 KS5~KS3 O Key scan output terminal

28,29 TDI/TDO - NC

30,31 KS2,1 O Key scan output terminal

32 TRST I NC

33 ROTARY CCW I Volume input terminal

34 ROTARY CW I Volume input terminal

35,36 TMS/TCM O NC

37 3.3VDD - AVR (3.3V)

38 VSS - GND

39~42 KI1~KI4 I Key return input terminal

43 FLGCP2 O FL bright control terminal

44 NC - NC

45 SYS TX I DATA input from system microprocessor

46 SYS RX O DATA output to system microprocessor

47 FL CLK3 O Clock output to FL driver

48 KI5 I Key return input terminal (SRC, OPEN, EJECT interrupt port)

49 FL DATA3 O DATA output to FL driver

50 SCK1 I Clock input from FL driver

51 NC - NC

52 FL DATA2 O DATA output to FL driver

53 CLK IN1 I Clock input from FL driver

54 NC - NC

55 FL DATA1 O DATA output to FL driver

56 3.3VDD - AVR (3.3V)

57,58 X2/X1 - Main clock (5MHz)

59~61

62 2.5V VDD - AVR 2.5V

63 VSS - GND

CVSS/CKSEL/PSEL

- GND

KDC-X879

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Description / Processing Operation

64,65 MODE0,1 - GND 66 PAN RST I Reset signal request form system microprocessor (L : Reset) 67 VREF - Connect to 83PIN (VREF) 68,69 NC - NC 70,71 AVSS1,0 - GND 72 VREF - Connect to 83PIN (VREF) 73 WAVE IN I Audio signal input terminal 74 F06 I Spectrum analyzer input terminal (BPF 10KHz) 75 F05 I Spectrum analyzer input terminal (BPF 3.3KHz) 76 F04 I Spectrum analyzer input terminal (BPF 1KHz) 77 F03 I Spectrum analyzer input terminal (BPF 330Hz) 78 F02 I Spectrum analyzer input terminal (BPF 150Hz) 79 F01 I Spectrum analyzer input terminal (BPF 63Hz) 80 NC - NC 81 2.5V VDD - AVR 2.5V 82 VSS - GND 83 VREF CON O VREF control terminal (Connect to VREF terminal) 84 NC - NC 85 FLGCP3 O FL bright control terminal 86 NC - NC 87 FL LATCH O Latch output to FL driver IC 88,89 NC - NC 90 REMO ON O Power supply control for remote control IC (H : ON, Hi-Z : OFF) 91 FL3.3V SW O FL3.3V control terminal (H : ON, Hi-Z : OFF) 92 FL+B SW O FL+B control terminal (H : ON, Hi-Z : OFF) 93 3.3V SW O 3.3V control terminal (L : ON, Hi-Z : OFF) 94 NC - NC 95 OE O OE control for Flash ROM (L : DATA transmission, Hi-Z : Wait ready) 96 NC - NC 97 WE/WR O WRITE/READ control for Flash ROM (L : Writing, Hi-Z : Wait ready) 98 3.3V VDD - AVR 3.3V 99 EVSS - GND 100 CE ROM O CE control for ROM (L : DATA transmission, Hi-Z : Wait ready) 101 CE F/ROM O CE control for Flash ROM (L : DATA transmission, Hi-Z : Wait ready) 102 103,104 NC - NC 105 GREEN LED O Select for illumination (GREEN H : ON, L : OFF) 106 RED LED O Select for illumination (RED H : ON, L : OFF) 107 DISP LED O DISP LED control (Normal H: ON, L : OFF) 108 BLACK DISP O Light up to DISP LED (H : ON, L : OFF)

FLASHROM CHECK

OWriting condition check for Flash ROM (H : OK, L : NG)

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Description / Processing Operation

109,110 NC - NC

111 SA RST O Reset for spectrum analyzer (H : Reset, L : Normal)

112 3.3V VDD - AVR 3.3V

113 EVSS - GND

114~117

118~123

124 2.5V VDD - AVR 2.5V

125 VSS - GND

126~133

134 3.3V VDD - AVR 3.3V

135 EVSS - GND

136~143

144 D15 I/O External ROM data input/output terminal

NC - NC A21~A16 O Address bus

A15~A8 O Address bus

A7~A0 O Address bus

KDC-X879

● MECHANISM CONTROL MICROPROCESSOR : 91CW12AFG-4VF6 (X32-559 : IC1)

Pin No. Pin Name I/O Description / Processing Operation

1 VREFL I Reference voltage input terminal

2AVSS - GND for ADC

3AVCC - Power supply for ADC (BU3.3V)

4NCONC (OPEN)

5 20RST O Reset control output terminal (for decoder) L : RESET, H : NORMAL

6 20ACK I Acknowledge signal input terminal (for decoder)

7 20STBY O Standby control (for decoder) H : STAND BY, L : NORMAL

8,9 NC O NC (OPEN)

10 20INT I Interrupt signal input terminal (for decoder)

11 FOGUP I Interrupt for focus gain up control signal H : Focus gain UP, L : NORMAL

12 LZM I 0bit muting detect (Lch) L : MUTE OFF, H : MUTE ON

13 RZM I 0bit muting detect (Rch) L : MUTE OFF, H : MUTE ON

14,15 NC O NC

16 20CS O Chip select signal output terminal (for decoder)

17 20LP O Latch pules signal output terminal (for decoder)

18 20TXD0 I/O Serial data signal output terminal (for decoder)

19 20RXD0 I Serial data signal input terminal (for decoder)

20 20SCLK0 O Serial data clock output terminal (for decoder)

21 DSPTXD1 O Serial data signal output terminal (for DSP)

22 DSPRXD1 I Serial data signal input terminal (for DSP)

23 DSPSCLK1 O Serial data clock output terminal (for DSP)

24 AM0 I Select for ROM mode H : NORMAL, L : External ROM mode

25 DVCC - BU3.3V

KDC-X879

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Description / Processing Operation

26 X2 O Oscillator (16MHz) 27 DVSS - GND 28 X1 I Oscillator (16MHz) 29 AM1 I BU3.3V 30 RESET I Reset terminal L : RESET, H : NORMAL 31,32 NC O NC 33,34 EMU0,1 O NC 35 DSPSTB O Data strobe signal output terminal 36 DSPA0 O Command, parameter select signal H : Parameter, L : Command 37 DSPRST O Reset control output terminal (for DSP) 38 DSPINT I Interrupt signal input terminal (for DSP) H : Interrupt 39 /DAC RESET O Reset signal output terminal (for DSP) L : RESET, H : NORMAL 40 SEARCH O Search condition output terminal H : Search, L : NORMAL 41 LOE/LIM_SW I SLT SW detect input terminal H : Inside 42~45 NC O NC (OPEN) 46 PONE5 O +5V AVR control terminal (for VIDEO) H : Power ON 47 PONE2.5 O +2.5V AVR control terminal (for VIDEO) H : Power ON 48,49 NC O NC (OPEN) 50 FLAGIN I C2 error detect terminal L : Correction OK, H : Correction NG 51~60 NC O NC (OPEN) 61 /DAC PD O Reset control output terminal (for DAC) L : RESET, H : NORMAL 62 DVSS - GND 63 NMI I Request for non maskable interrupt signal input terminal 64 DVCC - +VCC 65 DAC MUTE O Muting control output terminal (for DAC) H : MUTE, L : MUTE OFF 66 DAC PON O Audio power supply (for DXM-6550) H : POWER ON 67 PONA5 O +5V Audio power supply (for DXM-6550) H : POWER ON 68 ESRST O Reset signal output terminal (for ES3890) L : RESET, H : NORMAL 69 VMUTE O Video mute control terminal H : MUTE ON, L : MUTE OFF 70 NC O NC (OPEN) 71 SELINT O Video/Audio select output terminal H : NORMAL, L : Interrupt 72 ASEL0 O Audio signal output select control terminal 1 00 : STEREO, 01 : Lch 73 ASEL1 O Audio signal output select control terminal 1 10 : Rch, 11 : Not function 74 NT/PAL O NTSC/PAL select terminal L : NTSC, H : PAL 75 DATASEL O 20F/ES3890 output select H : 20F, L : ES3890 76,77 NC O NC (OPEN) 78 NC (BOOT) I Flash memory writing terminal L : Writing, H : NORMAL 79,80 NC O NC (OPEN) 81 POND3.3 O D3.3V power ON control terminal H : POWER ON 82 MUTEL O Audio muting control terminal (Lch)

KDC-X879

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Description / Processing Operation

83 MUTER O Audio muting control terminal (Rch)

84 SDA I/O I2C data (for system microprocessor)

85 SCL I/O I2C clock (for system microprocessor)

86 MSTOP I Interrupt signal for stand-by mode L : STOP, H : STOP cancellation

87 NC O NC

88 DMUTE O Driver muting control L : MUTE ON, H : MUTE OFF

89 DVCC - +VCC

90 NC O NC (OPEN)

91 DVSS - GND

92,93 NC I NC

94 MSEL I Memory capacity select input terminal H : Capacity Down, L : Capacity UP

95 VCDSEL I NC

96 ASEL I Audio signal output polarity selector H : Reversal output, L : Noninversion output

97 CHSEL I Changer detect input terminal H : Changer, L : Normal

98 SEL0 I Destination input terminal

99 SEL1 I Destination input terminal

100 VREFH I ADC reference power supply (BU3.3V)

KDC-X879

TEST MODE

● How to enter the test mode

While pressing and holding the Preset 1 and Preset 3 keys, reset the unit.

● How to exit from the test mode

While holding the Preset 6 key, reset the unit. Note : Turning ACC off, po wer off, momentary power down or panel detaching does not terminate the test mode.

● Initial status in the test mode

• Sources : ALL OFF

• Display : All segments are lit.

• Volume : -10dB (displayed as “30”)

• Loudness : OFF

• CRSC : OFF regardless of the presence of switching function.

• SYSTEM Q : Flat

• WOW : All OFF

• BEEP : When pressing any keys, the buzzer generates a beep at any time.

• AUX : ON

• MENU SYSTEM Q : OFF

• Variable model : Default is white

• Multifunction : Source dependency (Preset, SCAN, etc.)

● Special display in Tuner mode

When any of the following messages is displayed in Tuner mode, the F/E may be abnormal.

• “TNE2P NG” : The EEPROM is set to the default (unstable

values) because the F/E was shipped without passing through the adjustment process, etc.

• “TNCON NG” : Comm unication with the F/E is not possible.

● Forced switching of K3I

Each press of the Preset 6 key in Tuner mode should s witch K3I from AUTO→Forced Wide→Forced Middle→Forced Narrow→AUTO. The initial status is AUTO and the display shows these modes as follows.

• AUTO : FMA

• Forced Wide : FMW

• Forced Middle : FMM

• Forced Narrow : FMN

● Test mode specifications of the CD receiver

•Forced ejection is inhibited in the reset start operation. When the unit is reset while a CD is loaded in it, resetting does not recognize the CD.

• Each press of the Trac k Up k e y jumps to the following track numbers : No. 9→No. 15→No. 10→No. 11→No. 12→No. 13→No. 22 →No. 14→No. 9 (The cycle restarts from here.)

• Each press of the Track Down key jumps to the previous track number to the track being played.

•When the number of total trucks of the MP3 disc or the WMA disc is less than 9, 1st truck is played.

• When the disc media is CD, A short press of the Preset 1 key jumps to the track number 28.

• When the model is equipped the CD mechanism assembly adapted for MP3 or MP3/WMA disc, the mechanism name and version number are displayed during the FL model is lower stand and Display mode of LCD model is DNPS.

● Audio-related specifications

• Pressing the ✽ ke y on the remote initiates the audio adjustment mode.

• BL/F key on the Fader initials.

• Continuous holding of a remote control key is inhibited, and workings are short press of any keys.

• Bass, Middle and Treble are adjusted in 3 steps of -8 / 0 /+8 with the Track Up/Down keys (Default value at 0).

• Balance is adjusted in 3 steps of L15 / 0 / R15 with the Track Up/Down keys (Default value at 0).

•Fader is adjusted in 3 steps of R15 / 0 / F15 with the Track Up/Down keys (Default value at 0).

• HPF is adjusted in 2 steps of OFF / 170Hz (or 200Hz) with the Track Up/Down keys (Default value at OFF).

• LPF is adjusted in 2 steps of OFF / 120Hz with the Track Up/Down keys (Default value at OFF).

• Bass f, Bass Q, Bass EXT, Middle f, Middle Q and Treble f are not dealt with by the audio adjust.

• The WOW key passes during the audio adjustment as following steps (WOW model only).

Ordered TruBass FOCUS SRS Display

1 OFF OFF OFF SRS WOW OFF 2ONOFF OFF SRS T ruBass ON 3 OFF LOW OFF FOCUS LOW 4 OFF HIGH OFF FOCUS HIGH 5 OFF OFF ON SRS ON 6ONHIGH ON SRS WOW HIGH

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