Kenwood KDC-MPV8025, KDC-8026 Service Manual

CD RECEIVER

KDC-8026 KDC-MP825 KDC-MPV8025 KDC-W7027

SERVICE MANUAL

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

Panel assy KDC-8026 (A64-3231-01)

Panel assy KDC-MPV8025 (A64-3228-01)

Panel assy KDC-MP825 (A64-3229-01)

Panel assy KDC-W7027 (A64-3223-01)

* DC cord (E30-6294-05) (E30-6295-05)

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

* Depends on model. Refer to the parts list.

* DC cord (E30-4942-05)

*Size AA Battery

(Not Supplied)

Escutcheon (B07-3078-01)

Lever (D10-4674-04) x 2

TDF PANEL INFORMATION MODEL PARTS NO. PANEL NAME KDC-8026 KDC-MP825 KDC-MPV8025 KDC-W7027

Mounting hardware assy (J21-9823-03)

*Screw set (N99-1723-05)

Y33-1790-61 TDF-M7000

Screw (N99-1734-05)

* Antenna adaptor (T90-0552-05)

Plastic cabinet assy (A02-2731-13)

KDC-8026/MP825 KDC-MPV8025/W7027

BLOCK DIAGRAM

(X34- )

TUNER

AUDIO OUT

S-METER

BU5V

Q501

EEP5V

IC1

EEPROM

TDF UNIT (X16-208)

DISPLAY

UNIT (X16-254) (X16-255)

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

IC1

MASK ROM

FLASH ROM

BPF

SW5V

2.5V

LEDLED

AGC

BUFFER

SYSTEM MICROPROCESSOR

ILL+

RESET SW

PANEL5

Q6,10

PANEL SW5V

IC6

3.3V

SW3.3V

FL3.3V

Q2,3

FL+B

IC2

FM AM CD CH

QUAL

E-VOL

MPX

KEY ILL

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

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

KDC-8026/MP825 KDC-MPV8025/W7027

COMPONENTS DESCRIPTION

● SUB CIRCUIT UNIT (X16-2080-10)

Ref No. Application / Functions Operation / Condition / Compatibility

IC1 E2PROM E2PROM for security

● DISPLAY UNIT (X16-2540-10)

Ref No. Application / Functions Operation / Condition / Compatibility

IC1 Driver LCD driver (Include KEY input function)

IC2 Driver LCD driver

IC3 Remote control IC For Remote control sensor

Q1 SW Key scan start SW “ON” when Q1 base level goes L

Q2 Red LED SW Red LED is turned on when Q2 base level goes H

Q5 VLCD AVR Reference voltage

Q6 SW Power supply control SW “ON” when base level goes L

Q11 Dimmer control LCD back light control “OFF” when Q11 base level goes L

D26 VLCD AVR Reference voltage

● DISPLAY UNIT (X16-2550-10)

Ref No. Application / Functions Operation / Condition / Compatibility

IC1 Driver LCD driver (Include KEY input function)

IC2 Driver LCD driver

IC3 Remote control IC For Remote control sensor

IC4 D/A converter For Variable illumination control

Q1 SW Key scan start SW ON when Q1 base level goes L

Q2 Red LED SW Red LED is turned on when Q2 base level goes H

Q5,D26 VLCD AVR Reference voltage

Q6 SW Power supply control SW ON when base level goes L

Q11-16 Illumination control Variable illumination control transistor

Q62-64 Illumination control Variable illumination control transistor

● SWITCH UNIT (X16-2560-11)

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 (X32-5540-00)

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

IC6 AVR BU3.3V AVR

KDC-8026/MP825 KDC-MPV8025/W7027

COMPONENTS DESCRIPTION

Ref No. Application / Functions Operation / Condition / Compatibility

IC7 AVR BU2.5V AVR IC8 Selector IC Serial audio data selector IC9 AVR 3.3V AVR (IC2 DAC part) 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 APC Auto power control Q9,10 Switching TR Sub beam delay control switch

● ELECTRIC UNIT (X34-3040-10/11/21, X34-3042-71)

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 IC5 Power supply IC Switching regulator IC for CD5V IC7 Reset IC When BU5V line voltage is less than 3.5V, this IC output line is “L” IC8 Muting logic IC Control for MUTE, P-ANT & RESET muting IC12 RDS decoder Decode for RDS signal IC13,14 Motor driver Control for Panel mechanism motor Q1,2 BU 5V AVR While BU is applied when BU5V regulator output is +5V Q3 SW5V AVR When Q3base level goes L, 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 +8.4V Q9,34 Servo +B AVR When Q34 base level goes H, S+B regulator output is +7.4V Q11~14 Illumination +B AVR When Q11 base level goes H, AVR output is +10.5V Q23,24 P-ANT SW When Q23 base level goes H, P-ANT SW output is +14V Q25,26 P-CON SW When Q26 base level goes H, P-CPN SW output is +14V Q27,28 P-CON protection Protect Q27 by turning on when P-CON output is grounded Q29 Buffer EX amp control buffer Q30 Small lamp det. SW When Q30 base level goes H, Q30 turned ON Q32 BU detector When Q32 base level goes H, Q32 turned ON Q33 ACC detector When Q33 base level goes H, Q33 turned ON Q51,52 Muting driver When base level goes L, muting driver is turned ON Q55,56,59,60 Q63 E2P 5V SW When Q63 base level goes L, E2P 5V is out for E2P ROM Q102,103 AM +B SW When Q102 base level goes H, AM +B is out to tuner unit Q104 Buffer Composite signal buffer for RDS

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

KDC-8026/MP825 KDC-MPV8025/W7027

MICROCOMPUTER’S TERMINAL DESCRIPTION

● SYSTEM MICROPROCESSOR : UPD703030GC042 (X34-304 : 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 DIMMER CONT O Dimmer control terminal (W-LED only : Pulse control F=1KHz, Normal : H)

18 TEST - NC (GND)

19 TYPE2 I Destination select terminal

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 SW5V I/O SW5V control terminal (OFF : H, ON : L)

26 EXT AMP CONT O External amplifier control terminal

27 DIMMER I Small lamp detection terminal (ON : L, OFF : H)

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

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)

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

Fig.

KDC-8026/MP825 KDC-MPV8025/W7027

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 NC - NC

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 L CE O CE output to LCD driver IC

53 L INH O INN output to LCD driver IC (Normal : H, Reset, Momentary power dropped : L)

54 VOL A I Volume input terminal

55 DVDD - AVR 5V

56 DVSS - GND

57 VOL B I Volume input terminal

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 1

64 FPM MOTOR F O FPM mechanism (Slider) control terminal 1

65 FPM MOTOR O O FPM mechanism (Angle) control terminal 1

66 FPM MOTOR C O FPM mechanism (Angle) control terminal 1

67 O DATA I/O External display DATA terminal 1

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 1

79 FPM SW2 I FPM mechanism position detect terminal 1

80 FPM SW3 I FPM mechanism position detect terminal 1

81 FPM PHOUT I FPM mechanism position detect terminal (2.2V or more : H) 1

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)

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 L DATAL I Data input from LCD driver 98 L DATAS O Data output to LCD driver 99 L CLK O CLK output to LCD driver 100 PLL CLK I/O Clock input/ output to Tuner front-end

KDC-8026/MP825 KDC-MPV8025/W7027

Fig.1 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

ANGLE FPM mechanism

LLStandby

HLAngle open direction

LHAngle close direction

HHBrake

● MECHANISM CONTROL MICROPROCESSOR : 91CW12AFG-4VF6 (X32-554 : 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

KDC-8026/MP825 KDC-MPV8025/W7027

MICROCOMPUTER’S TERMINAL DESCRIPTION

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

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

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

KDC-8026/MP825 KDC-MPV8025/W7027

MICROCOMPUTER’S TERMINAL DESCRIPTION

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

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) 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 DXM6540 (SEL0 : Lo, SEL1 : Lo) 99 SEL1 I Destination input terminal DXM6540 (SEL0 : Lo, SEL1 : Lo) 100 VREFH I ADC reference power supply (BU3.3V)

KDC-8026/MP825 KDC-MPV8025/W7027

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 switch 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 Track Up key jumps to the f ollowing 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 TruBass ON 3 OFF LOW OFF FOCUS LOW 4 OFF HIGH OFF FOCUS HIGH 5 OFF OFF ON SRS ON 6ONHIGH ON SRS WOW HIGH

TEST MODE

KDC-8026/MP825 KDC-MPV8025/W7027

● Menu-related specifications

• A short press of the Q key initiates the menu mode.

• Pressing the DNPP key on the remote initiates the Menu mode.

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

• Contrast is adjusted in 3 steps of 0 / 5 / 10 with the Track Up/Down keys (Default value at 5).

● Backup current measurement

When the unit is reset while ACC is OFF (i.e. by turning Backup ON), the MUTE terminal goes OFF in 2 seconds in place of 15 second. (The CD mechanism is not activated at this time.)

● Special display when the display is all on

Pressing the Preset keys while the power is ALL OFF displays the following information.

[PRESET 1]

[PRESET 2]

[PRESET 3]

[PRESET 4]

[PRESET 5]

[PRESET 6]

FM key Display ROM collection version.

Version display (8 digits, Month/Day/Hour/Minute) (Display) SYS xxxxxxxx :

PAN xxxxxxxx : FL model only MEM

xxxxxxxx : Serial number display (8 digits) (Display) SNo xxxxxxxx Short press : View power ON time. (The All OFF period is not counted.) 2 seconds long press/hold : Clear power ON time at the power ON time displaying. (Display) PonTim xxxxx Max. 60000 (hours) Short press : Display CD operation time. 2 seconds long press/hold : Clear CD operation time at the CD operation time displaying. (Display) CDTim xxxxx Max. 60000 (hours) Short press : Display CD ejection count. 2 seconds long press/hold : Clear CD ejection count at the CD ejection count displaying. (Display) EjeCnt xxxxx Max. 60000 (times) Short press : Display Panel open/close count. 2 seconds long press/hold : Clear Panel open/close count at the Panel open/close count. (Display) PnCnt xxxxxx Max. 600000 (times)

(Display) ROM R xxx Invalid : “R – – –”

4 contrasts FL model only

AM key Display panel E2PROM condition.

(Display) P–ROM OK (Registered code)

P–ROM NG (Code is write in error) P–ROM WAIT (Unregistered code) P-ROM NON

(Panel security nonfunctional)

● Panel mechanism

• Auto-panel close inhibition when set-in the CD.

• The panel operation inhibition at power ON/OFF and ACC ON/OFF.

• The panel position changing Eject→Last with a short press of the PLAY/PAUSE keys.

● Other specifications

• No displays such as “CODE OFF/ON” during Power-ON.

• The LINE MUTE inhibition time is one second from 10 seconds when start-up the test mode.

• Do not write the security code with the security jig on the test mode.

• Do not write the serial with the serial writing jig on the test mode.

• OEM display output is not stop if OEM display not connection on the test mode.

● Switching the frequency span (K/M type)

While holding the Preset 1 key and Preset 5 key, reset the unit.

● Demonstration mode

1. How to enter to the Demonstration mode

1. Hold down the [Q] key and [TI (AME)] k ey button when the power is on and press the Reset button.

2. This will enter to the Demonstration mode.

2. How to chancel the Demonstration mode

1. Hold-down the Preset [5] key button when the power is on and press the Reset button.

2. This will cancel the Demonstration mode.

KDC-8026/MP825 KDC-MPV8025/W7027

TEST MODE

● Security information

1. Forced Power ON mode (All models)

Even when the security (Cord) is approved, resetting the unit while holding the Q and Preset 4 keys makes it possible to turn the power ON for 30 minutes. After 30 minutes have elapsed, it is not possib le to return to the previous condition unless the unit is reset again. (Security code is doing not clear at this mode. Put the power on fill-in.) When panel security was set up for the unit when it is can not power on. In this case, you can use new ROM for the TDF panel that the unit can be power on for test mode. Note : Don’t enter the panel security set up for new ROM panel. User can not power on the unit.

2. Method of registration of the security code after EEPROM (F/E) replacement (Code security model)

1. Enter the test mode. (See How to enter the test mode)

2. Press the MENU key to enter the Menu mode.

3. When the message “Security” is displa yed, press and hold the Track Up/Down key for 1 second to enter the security registration mode.

4. Enter the code using the FM/AM/T r ack Up/Track Down keys. FM key : Number up AM key : Number down Track Up key : Cursor right shift Track Down key : Cursor left shift

5. Hold down the Track Up key for at least 3 seconds and the message, “RE-ENTER” appears, so once again enter the code according to Step 4 above.

6. Press and hold the Track Up key for 3 seconds until “APPROVED” is displayed.

7. Exit from the test mode. (See 2. How to exit from the test mode) Note 1 : All Clear is not applicable to the security code of this model. Note 2 : When the F/E changed, need re-inscription because the panel security is clear.

3. How to inscription the panel security code

1. Enter the test mode.

2. Pressing the AM key on all lighting, check the “P-ROM W AIT” display.

3. The NEXT key is long press 2 seconds, writing the code.

4. Display is “P-ROM OK”.

5. Exit from the test mode. Note : E2PROM connection is NG when displa y is “P-R OM NG”, so detach the panel and rewrite after the display is “PROM WAIT”. This code can not clear.

4. Simple way to c lear the security code (K type only)

1. During code request mode, press the Track UP key for at least 3 seconds while holding down the A UTO key. (– – – – will disappear)

2. Enter, “KCAR” with the remote controller as described below.

• Press the remote controller 5 key twice, and press the Track Up key. (Enters a “K” )

• Press the remote controller 2 key three times, and press the Track Up key. (Enters a “C” )

• Press the remote controller 2 key once, and press the Track Up key. (Enters an “A” )

• Press the remote controller 7 key twice, and press the Track Up key. (Enters an “R” )

3. Security function is canceled and unit sets to All-Off mode.

4. Code request mode appears if a mistake was made in entering the numbers.

EDCBA

KDC-8026/MP825 KDC-MPV8025/W7027

PC BOARD (COMPONENT SIDE VIEW) (FOIL SIDE VIEW)

DISPLAY UNIT X16-2540-10 (J74-1588-02)

D16

DISPLAY UNIT X16-2540-10 (J74-1588-02)

R54

Q11

R14

R52

IC1

R11

R67

R68

E2P5V

DSI

C26

R53

VLCD1

R12

E2PCLK

R13

RST

ILLGND

DIMMER

100

R23

KS4

KS3 KS2

KS1

ESDGND

VOLA

CP4

KI1

KI2

VOLB

C27

ILLGND

51 75

KI3

KI4

CN2

R51

CP5

R26

GREEN

KI5

RED

E2PDATA

PANDET

R1 C1

R2 C2

R24

CN1

D26

CP1

CLK DATAS DATAL INH

144 73

D11

D19

DGND

REMO

51 75

X16-2540-10

Ref. No. Address

D18 D17

IC3

IC3 7A

R19

CCB

EEB

R16

R17

R20 C19 C18 C17

R18

C28

C16

C12

R36

IC2

R35

ILL+B

VLCD1

C14

PAN5V

C13

R15

R31

R10

R33

R34

C12

C29

100

C11

R32

25 1

X16-2540-10

Ref. No. Address

IC1 3D

IC2 6D

Q1 3C Q2 6C Q5 4D Q6 7D

Q11 2D

Refer to the schematic diagram for the values of

resistors and capacitors.

F G H I J

KDC-8026/MP825 KDC-MPV8025/W7027

PC BOARD (COMPONENT SIDE VIEW)

ELECTRIC UNIT X34-304x-xx (J74-1474-22)

CN1

CN2

Q12

Q13

12 11

2 1

R43

R112

Q11

BEBEBEBE

R105

OGI

IC3

C104

C109

R44

C102

R32

R31

C108

C110

2 1

R55

R56

C213

R127

Q24

D14

D15

D16

C105

C132 R140

R139

R141

R138

Q32

IC8

IC5

R125

D17

148

C131

R126

Q60 Q59

Q55

Q56

Q58 Q57

R102 R103

RST

R143

R48R47R23R35

R24R36

R46

R21

R34

R33

R207

R45

R22

R265

IC15

R283

R282

R128

R206

R204

D20

R205

R203

DATA

R129

R209

R211

R214

C50

C49

C41

C42

C46

C45

R208

R210

C207

R202

C208

CLK

C252

C200

R215

C100

C32

C256

Q25

Q26

D13

IC2

TEST

R201

IC1

R200

R217

R216

R218

R219

R220

1222

4434

CN4

C128

C126

C250

C254

C253

R300

C1 C2

D26

D25

100

7551

R228

R268

R262

R230

R260

R275

124

R257

R259

R250

R252

R253

R256

R251

R234 R235 R236 R237

C34

C111

C112

C113

C700

128

CN5

CN6

115

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