KENWOOD KDC-8018 Service Manual

CD RECEIVER

KDC-716S/8018

SERVICE MANUAL

● KDC-716S

© 2001-1 PRINTED IN JAPAN

B51-7717-00(S) 1751

47Wx4

Knob(VOL)
(K25-1222-03)

Plastic cabinet assy
(A02-1497-03)

Front glass
(B10-3257-01:716S)
(B10-3259-01:8018)

KDC-716S

LOUD SCAN RDM REP M. RDM

Panel assy
(A64-2154-02:716S)
(A64-2156-02:8018)

Knob(1-6)
(K25-1223-03)

DC cord
(E30-4939-05:8018)
(E30-4940-05:716S)

Screw set
(N99-1652-05)

COMPACT

DIGITAL AUDIO

TEXT

AUTO

DISP

AME

NAME.S

Torsion coil spring
(G01-2924-04)

PWR OFF

AUD

DAB

Knob(FM/AM)
(K25-1225-03)

MENU

CLK

ANG

Knob(EJECT)
(K25-1226-03)

Lever
(D10-4562-04)

Bracket
(J19-5051-03:L)
(J19-5052-03:R)

Stay
(J54-0606-04)

Mounting hardware assy
(J21-9716-03)

Remote controller assy
(A70-0883-05)

Escutcheon
(B07-3010-02)

Screw set
(N99-1704-05)

KDC-716S/8018

PLL+B

FM+B

AM+B

DIMMER

MUTE

2WAY

DET.

ACC

SRM

BU DET.

SRM

DRIVER

A8V

SERVO

SW5V

BU5V

P CON

ANT-CON

MUTE

DRIVER

MUTE

POWER IC

IC4

u-COM

IC1

CD

CH

IC8

Q37-40

IC2

F/E

MECHA

E-VOL

PRE OUT

SP-OUT

DIMMER

TEL-MUTE

ACC

ANT-CONT

P-CON

BACK UP

3600mV

3600mV

1800mV(K,M)

600mV(K,M)

Q14

Q15

Q31

Q26-29

Q1,2Q3

Q9

Q30

IC15

IC2

IC1

EX.AMP CONTROL

AVR

RESET IC

IC16

BUFFER

Q36

NOISE

CONTROL

EX.AMP

PANEL 5V

Q7,8

Q10-13

Q4-6

ILLUM

+B

SW14V

E-VOL

PREOUT

PRE OUT LEVEL

ATT

CD MECHA

CD,MD-CH

FM

AM

CH

S-METER

QUAL

SERVO+B

MO SW

STOP

MUTE

SW2

LO/EJ

RST

SW3

SW1

SDA

SCL

A8V

BU5V

SW5V

RST

REQ C

CLK

CH-CON

DATA H

REQ H

CD

AM

FM

MUTE

PRE MUTE

RESET

DIMMER

KEY REQ

L DATAS

L CE

L DATAL

L CLK/PANEL

REMO

SRM SW2

SRM SW3

SRM DET

SRM SW1

SDA

SCL

AFS

AFS

S-METER

A8V

PLL CLK

PLL DATA

S-METER

DATA C

BACK UP

3795mV

3795mV

2005mV

656mV

1200mV

1200mV

896mV

207mV

470mV(K,M)

230mV(K,M)

IFC OUT

AUDIO OUT

SW5V

NOISE

IFC OUT

SRM SUB­SRM SUB+

DRIVER

MUTE

BU5V

LEVEL DIAGRAM

LCD

(BACK LIGHT

W-LED)

LCD DRIVER

G/R SW

KEY

MATRIX

LCD TYPE

(X13-996)

REMO

SW

RESET

PANEL 5V

DIMMER PWM CONTROL

BLOCK DIAGRAM

2

KDC-716S/8018

MICROCOMPUTER'S TERMINAL DESCRIPTION

System µ-com: UPD703033GC053

●Terminal description

Pin Function I/O Description Processing Operation

1 AM+B O AM power terminal H: During AM radio operation
2 FM+B O FM power terminal H: During FM radio operation

H: During FM radio operation if with RDS, RBDS

3

AFS

4 PLL-DATA I/O Data I/O terminal to F/E
5 PLL-CLK I/O CLK terminal to F/E
6 Evdd - Positive power terminal
7 Evss - GND terminal
8 N.C O Open (not used)

9 BEEP O BEEP output terminal
10 N.C O Open (not used)
11 PRE-MUTE L O L (during CD): when M MUTE L is L (low)

12 PRE-MUTE R O L (during CD): when M MUTE R is L (low)

13 IC2-SDA I/O IC2, IC5, CD mechanism, DATA line
14 IC2-SCL O IC2, IC5, CD mechanism, CLK line
15 N.C O Open (not used)
16 N.C O Open (not used)
17 N.C O Open (not used)
18 TEST - Test terminal
19 P-MUTE O Power IC MUTE terminal L: During Power-OFF L: During All-OFF

20 P-STBY O Power IC STBY terminal
21 MUTE O MUTE termianl ON: Open OFF: L
22 N.C O Open (not used)
23 N.C O Open (not used)
24 ACC-DET I ACC detection terminal L: ACC H: No ACC
25 DIMMER I Small detection terminal ON: L OFF: H
26 SW5V O 5 volt power terminal ON: L OFF: H
27 EXT-AMP-CO O External AMP control terminal (200ms) L 40ms: Bus boost OFF

28 P-CON O Power control terminal Power ON: H Power OFF: L
29 ANT-CON O Antenna control terminal TUNER, TI ON: H Open if no ANT-CON
30 P-ON O SW14V control terminal Power ON: H Power OFF: L
31

RESET
32 XT1 I Subclock terminal Time count Operation during Power-OFF
33 XT2 - Subclock terminal
34 REGC ­35 X2 - Main clock terminal Oscillates: During Power-ON

36 X1 I Main clock terminal
37 Vss - GND terminal
38 Vdd - +B terminal
39 CLKOUT O Internal system clock output
40 N.C O Open (not used)
41 N.C O Open (not used)
42 TYPE0 I Destination selector port
43 TYPE1 I Destination selector port
44 TYPE2 I Destination selector port
45 N.C O Open (not used)
46 IC2TYPE0 I IC2 destination terminal L: During default

O Switching terminal for noise detection L: During AF search, FM seek

H: During receive

L during momentary power down
Fixed at H only during 2 zone

L during momentary power down
Fixed at H only during 2 zone

L: During Tell-mute
Power IC ON: H. Power IC OFF: L. During All-OFF: H

L 70ms: Bus boost LOW
L 100ms: Bus boost HI

I Reset IN terminal H: Normally H: During reset

Capacitor output terminal for regulator inside microprocessor

Oscillates stop: During Power-OFF, during
momentary power down

3

KDC-716S/8018

MICROCOMPUTER'S TERMINAL DESCRIPTION

Pin Function I/O Description Processing Operation

47 IC2TYPE1 I IC2 destination terminal L: During default
48

CH-REQH

49 CH-RST O Reset output to changer Normally L, after system RST reset is ”H” for
50 CH-MUTE I Mute request from changer ON: H OFF: L

51 CH-CON O Changer control output ON: H OFF: L
52 ILL-ON O FL, illumination output ON: H OFF: L
53 M-MUTE L I Mute request from CD mechanism ON: L
54 M-MUTE R I Mute request from CD mechanism ON: L
55 BVdd - +B terminal
56 BVss - GND terminal
57 M-RST O Reset output to CD mechanism Normally H, L:During reset

58 M-STOP O Stop request to CD mechanism Stop: L H: During CD
59 N.C O Open (not used)
60 LO/EJ I/O CD mechanism, LODING, EJECT selector Stop, Brake: Hi-z, LOADING: L, EJECT: H
61 MOSW O CD mechanism, MOTOR, SW LOADING, EJECT, Brake: H
62 N.C O Open (not used)
63 CD-SW3 I CD down SW detection terminal Chucking: H
64 PAN-RESET O Reset output to panel microprocessor
65 MC-REQ/PAN I/O
66 N.C O Open (not used)
67 N.C O Open (not used)
68 N.C O Open (not used)
69 N.C O Open (not used)
70 AVCONT O AD reference voltage control output Same timing as P ON H: During operation
71 Avdd - +B terminal
72 Avss - GND terminal
73 Avref I
74 PHONE I PHONE detection terminal Tel mute: Min 1 volt, Navi mute: Max.2.5 volt
75 SRM-SW3 I Mask mechanism position detection input See 01mask mechanical position detection chart
76 SRM-SW1 I Mask mechanism position detection input See 01mask mechanical position detection chart
77 SRM-SW2 I Mask mechanism position detection input See 01mask mechanical position detection chart
78 SRM-DET I Mask mechanism detection input L: Mechanism H: No mechanism
79 NOISE I FM noise detection terminal
80 S-METER I S meter detection terminal
81 R-DATA I RDS DECODER DATA input terminal Connect to GND: On models without RDS,

82 R-QUAL I RDS DECODER QUAL input terminal Connect to GND: On models without RDS,
83 IFC-OUT I F/E IFC OUT input terminal L: When station present

84 N.C I Open (not used) Connect to GND
85 N.C I Open (not used) Connect to GND
86 SRM-B O SRM mechanical submotor output terminal
87 R-CLK I RDS DECODER CLK input terminal Connect to GHD: On models without RDS,

88 CH-REQC I Input request from changer ON: L
89 SC-REQ I
90 CD-SW1 I LOADING SW detection terminal LOADING start: L
91 CD-SW2 I 12cm disk detection switch terminal 12cm DISC: L
92 SRM+B O SRM mechanical submotor output terminal
93 BU-DET I Momentary power down detection terminal L: B.U H: No B.U (momentary power down)
94 CH-DATAC I Data input terminal from changer
95 CH-DATAH O Data input terminal to changer
96 CH-CLK I/O CLK I/O terminal used with changer
97 SC-DATA I Data line from panel microprocessor
98 MC-DATA I/O Data line to panel microprocessor
99 MC-CLK O CLK terminal to panel microprocessor

100 PAN5V O Panel 5 volt control terminal L: Panel H: No panel

O Request output to changer

REQ terminal/panel detection for panel microprocessor

Reference voltage supply terminal for A/D converter

Communication request from panel microprocessor

400ms and then ”L”

Per mechanical control specs.

Normally H, L: During reset, momentary power down
L: During panel use

RBDS
RBDS

RBDS

4

ADJUSTMENT

KDC-716S/8018

Test Mode

1. How to enter test mode

While holding the FM key and the Preset 6 key, reset the
unit.

2. How to exit from test mode.

While holding down the Preset 6 key, reset the unit.
Note: Does not exit from test mode ACC-OFF, Power-OFF
or Momentary power down

3. Test mode reset status

•Sources are all OFF

•All display segment lit up

•Volume at -10dB (shows 30 on display)

•LOUD is OFF.

•CRSC is OFF regardless of whether switching function is

provided.

•SYSTEM Q is in FLAT

•Blank skip is OFF. (C/R model)

•LEDs are white, no scanning. (VLCD model)

4. Special displays in Tuner

When the following displays appear in tuner mode it shows
a problem with the front end.

•“TNE2P NG” ..... F/E is not aligned and EEPROM is in

reset (no settings) such as when shipped.

•“TNCON NG” .... Cannot communicate with F/E (front

end).

5. K3I switching

Each time the Preset 6 key is pressed in Tuner mode,
switches one at a time through the following sequence:
AUTO → Forced Wide → Forced Middle → Forced Narrow

→ AUTO. When reset, displays the following in AUTO.

•AUTO ................ FMA

•Forced Wide ..... FMW

•Forced Middle ... FMM

•Forced Narrow .. FMN

6. CD receiver test mode specifications

•No automatic ejection during reset-start. Does not make a

CD check in reset with a CD loaded.

•Using the Track up key jumps to the following tracks.

No.9→No.15→No.10→No.11→No.12→No.13→No.14→and
back to No. 9

•Using the Track down key moves 1 track downwards from

the track being played.

7. Audio items

•Momentarily pressing the Q key calls up audio adjustment

mode.

•Pressing the ∗ key on the remote control calls up audio

alignment mode.

•Continuous forward is disabled on the remote control.

•Bass/Middle/Treble are settable in 3 steps of MIN/

CENTER/MAX with the Track up/down keys.

•Balance is settable in 3 steps of Left MAX/CENTER/Right
MAX with the Track up/down keys.

•Fader is settable in 3 steps of Rear MAX/CENTER/Front
MAX with the Track up/down keys.

•HPF is settable in 2 steps of THRU/220Hz with the Track
up/down keys.

•LPF is settable in 2 steps of THRU/120Hz with the Track
up/down keys.

•Bass f/Bass Q/Bass EXT/Middle f/Middle Q/Treble f do
not appear in the audio alignment.

8. Menu items

•Momentarily pressing the CLK key calls up the Menu mode.

•The DNPP/SBF keys on the remote control calls up Menu

mode.

•Continuous forward is disabled on the remote control.

•Calendar adjust, calendar display switching and calendar

memo are eliminated from forward (FL model)

•In color alignment mode, Preset 1 is red, 2 is blue, 3 is
green and 4 is white. (VLCD model).

•Contrast is set in 3 steps of 0, 5, 10 and the reset value is

5. (VLCD/LCD models)

•Brightness adjustment is set in 3 steps of 0, 5, 10 and the
reset value is 10. (Normal FL model)

9. Backup current measurement

The MUTE terminal turns off 2 seconds (not 15 seconds)
after being reset in ACC off (backup on). (The panel, CD
and tape mechanisms are disabled during this time.)

10. Special displays during All-Off with all lamps on

The following displays appear when the preset keys are
pressed with all display segment lit up.

PRESET1 Version display (8 digits; Mo. Dy. Hr. Mn.)

(Display) SYS XXXXXXXX system microprocessor

PAN XXXXXXXX panel microprocessor

PRESET2

PRESET3

PRESET4 Press once: TAPE/CD/MD operating time display.

PRESET5 Press once: TAPE/CD/MD eject count display.

PRESET6 Press once: PANEL open/shut count display.

Serial No. display (8 digits) Note: CD/RK type eXcelon model

(Display) SNo XXXXXXXX

Press once: Power-on time display (Does not count during All-Off)

Press long: Clears the time display during power-on.
(Display) PonTim XXXXX (C/R) MAX 65535(time)

Press long: Clears TAPE/CD/MD operating time.
(Display) CDTime XXXXX (CD/R)

TapTim XXXXX (C/R) MAX 65535(time)

Press long: Clears TAPE/CD/MD eject count display.
(Display) EjeTim XXXXX MAX 65535(count)

Press long: Clears PANEL open/shut count display.
(Display) PnCnt XXXXX MAX 655350(count)

5

KDC-716S/8018

ADJUSTMENT

11. Others

•Automatic panel close is disabled when tape or CD is
inserted. (M&T model)

•Panel operation is disabled at Power-ON or Power-OFF.
(M&T model)

•Panel open and closes with the ATT key. (M&T model)

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

•Pressing the TI (AUTO) key during changer operation turns

on 2zone. Cancel by pressing the TI (AUTO) key again.
The P/S dot is lit during 2zone.

•Pressing the CLK key for 1 second or more during All OFF,
calls up the Mask Key (security) write mode.

Security items

• Forced power-ON mode (all models)

Even when writing is permitted by the security function (mask
key), Power-on can be set for a 30 minute period each time
the reset key is pressed while holding down the ATT key
and Preset 4 keys. After 30 minutes elapses, can only be
restored by using reset.

• How to register the security code for EEPROM (F/E)

replacement (coded security models)

1. While holding the FM key and the preset 6 key, reset the

unit.

2. Call up security register mode by pressing the CLK key.

3. Enter the code with the Preset 1/2/3/4 keys.

For example, to enter the number, “3510”....

- Press the Preset 1 key 4 times.

- Press the Preset 2 key 6 times.

- Press the Preset 3 key 2 times.

- Press the Preset 4 key 1 time.

4. Hold down the DISP key for at least 3 seconds and the

message, “RE-ENTER” appears, so once again enter
the code according to Step 3 above.

5. Hold down the DISP key for at least 3 seconds, and the

message, “APPROVED” appears.

6. Cancel test mode. (See, 2. How to cancel the test mode.)

Note: All clear cannot be performed on the security code
for this model.

• Simple way to clear the security code (K type only)

1. During code request mode, press the VOL UP key for at

least 3 seconds while holding down the DISP key.
(---- will disappear)

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

below. (Same as on 00 model.)
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.

6

IHGE FDCA B

PC BOARD (Component Side View)

1

CD PLAYER UNIT CD PLAYER UNIT

CD PLAYER UNIT
(X32-5030-00)

.ON.feR
CIQ
1B4
2C4

2

4D2
5D3
6D3

1B4
2D4
3D3
4C4
5D4

sserddA

3

D1

R8

C5

4

R10
R11

R12

C10

C11

5

FCS+

LD

R9

C4

W17

PD

B
E

C6

C7

C12

R5

Q1

CN1

1

C8

16

R202

IOP+

/RFDET

X32-5030-00 (J74-1161-02)

R83
C45

R82

-

ECS

+

FCS-

16

TRK-

32

17

C2

+

-

BDO

R3

C1

TE

FE

ARF

S.GND

C

C16

A

R234

+

TE

FOD

EJECT/SLED-

CP3

A.+B

R6

F

Vcc

Vc

1

C18

R17

TBAL

GCTL

-

RF

F

IC1

C89

TRCRS

GND

IOP-

LOAD
SLED+

SW3

S.+B

TRK+

VR

R72
C43

R71

Rch

C3

D
B

FBAL

VDET

TR

+

1

CN2

22

R19

R233

LDON

OFT

R81

R73

-

R75

+

­TVD

RW

D4

R218

C19

C20

R21

R20

C15

C14

R16C13

R15

25 51

C17

R18

C23

Vref

E

A.GND

C55

1

C33

26

TOFS

R36

Lch

R47

C35

R32

R34

S3

CP2

CP1

Q4

C29

SPDL-

BE

CLVS

IC2

C85

R54

C24

C26

R37

C28

R38 C25

IPFLAG

/MSTOP

/MRST

C21

76100

X1

50

FCLK

FLAG

SPDL+

C46

BU.5V

75

DQSY

STLD

ST-O

R76

R44 C51

Q3

R107

R52

R213

LDCNT

SMCK

1

14

EB

C34
R45

R46

IC4

/MUTEL

/MUTER

LO/EJ

R125

R117

R49

D.OUT

Q2

EBEB

S2

C41

R77

C79

8

C77

5
C71

R121

D2

S1

IC5

I

C67

GO

R103

D3

SW2

28

R78

15

A.5V

IC6

D.GND

MOTOR

C63

+

C80

1

4

C72

C68

/RST

Q5

C78

R104

/CLK
SW1

R122

DATA

R126

R118

R102

R108

PC BOARD (Foil Side View)

X32-5030-00 (J74-1161-02)

IC4

R77
/MUTEL

/MUTER

LO/EJ

I

8

5

C67

R103

D.OUT

D2

S1

C41

C77

R121

Q2

C34
R45

14

R125

R117

1

R44C51

EB

R49

R46

S2

LDCNT

R76

Q3

R107

SMCK

ST-O

/MRST

SPDL+

BU.5V

R213

DQSY

STLD

/MSTOP

R52

C46

75

51

FCLK

76

50

SPDL-

C21

CLVS

X1

C24

C28
C25

FLAG

IPFLAG

IC2

R37

C85
R54

C26

R38

R81

-

R75

+

-

S3

TVD

EJECT/SLED-

A.GND

Lch

CP2

CP1

E
B

R47

Q4

C55

RW

100

D4

1

C29

C35

R32

R34

TOFS

R36

R218

C20

C33

R21

R20

R15

R16

C14

25

C17

C13

26

C23

Vref

R18

R233

LDON

E

OFT

R108

R102

DATA

/CLK

MOTOR

R126

R118

SW1

R122

/RST

C78

C72

+

C80

1

4

R104

D.GND

A.5V

C68

SW2

Q5

28

15

C63

D3

R78

IC5

GO

C79

IC6

C71

BBEE

R72
C43

R73

+

1

22

R19

C19

C15

FBAL

VDET

Rch

CN2

C3

FOD

S.GND

A.+B

Vcc

Vc

D
B

R17

TBAL

GCTL

RF

TR

R71

CP3

R6

F

1

R234

-+

TE

F

A

TE

ARF

R83
C45

TRK-

R3

C18

C

FE

R82

­ECS

+

LOAD

SLED+

SW3

S.+B

TRK+

FCS-

C1

16

32

17

C16

C2

+

-

TRCRS

BDO

/RFDET

CD PLAYER UNIT
(X32-5030-00)

.ON.feR
CIQ
1H4
2G4
4F2
5F3
6F3

1H4
2F4
3F3
4G4
5F4

FCS+

LD

VR

PD

R5

CN1

1

IC1

16

C89

R202

GND

IOP+

IOP-

D1

R8

R9

C4

W17

B

Q1

E

C5

R12

C6

R10
R11

C7

C8

C10

C12

C11

sserddA

6

Refer to the schematic diagram for the values of resistors and capacitors.

7

7 8