Kenwood KDC-7080-RYV, KDC-7080-RY, KDC-7080-RV, KDC-7080-R Service Manual

CD RECEIVER

KDC-7080R

DISP

Escutcheon assy

(B07-2139-03)

Panel assy
KDC-7080R/RY : (A64-1866-02)
KDC-7080RV/RYV: (A64-1953-02)

Dressing panel

(A21-4010-03)

DC cord

KDC-7080R/RY : (E-30-4788-05)
KDC-7080RV/RYV: (E-30-4789-05)

Torsion coil spring

(G01-2924-04)

Screw set

(N99-1683-05)

Mounting hardware assy

(J21-9491-03)

Plastic cabinet assy

(A02-1489-03)

Lever

(D10-4301-14)

Lever

(D10-4302-14)

Antenna adaptor

(T90-0523-05)

Remote controller assy

(A70-0886-15)

Front glass
KDC-7080R/RY : (B10-3105-01)
KDC-7080RV/RYV: (B10-3106-01)

Illustration is KDC-7080R

KDC-7080R/RY
KDC-7080RV/RYV

SERVICE MANUAL

© 2000-1 PRINTED IN JAPAN
B51-7573-00 (N) 1895

Extension cord Parts No.

CD mechanism (22P) W05-0618-00

The MECHANISM OPERATION DESCRIPTION is the same as model KDC-S3007 and KDC-5050RG.
Please refer to the service manual for model KDC-S3007 (B51-7029-00) or KDC-5050RG (B51-7099-00).

KDC-7080R/RY/RV/RYV

COM+B

FM+B

AM+B

E2PROM

DIMMER

2WAY MUTE

ACC DET.

SRM

PHOT

BU DET.

SRM

DRIVER

A8V

SERVO

DC/DC

SW14V

SW5V

BU5V

P CON

ANT-CON

MUTE DRIVER

4.5V PRE

MUTE

E's

POWER IC

IC4

IC14

u-com

IC1

CD

CH

IC10

IC7-9

IC5

IC2

F/E

MECHA

DET.

E-VOL

PREOUT

SP-OUT

DIMMER

TEL-MUTE

ACC

ANT-CONT

P-CON

BACK UP

DECORDER

RDS

IC11

EX.AMP CONTROL

AVR

RESET IC

IC15

ANT. IN

AMP

IC12

NOISE

PREOUT OUTPUT VOLTAGE

CONTROL

EX.AMP

NAVI-MUTE

PANEL 5V

4.5VPRE

IC3

IC6

ILLUM

+B

LCD

LCD CONT. 1

G/R SW

KEY

MATRIX

LCD TYPE

LOCK SW

PANEL

REMO

RESET SW

PLL CLK

CH

MO SW

SERVO+B

LO/EJ

STOP

MUTE

DATA S

CLK

SW2

CS

SQR

DATA M

SW3

SW1

A8V

BU5V

RST

REQ C

CLK

CH-CON

DATA H

REQ H

CD

AM

FM

MUTE

RESET

SRM SW1

SRM DET

SRM SW2

RDCK

RDDA

QUAL

SDA

SCL

A8V

+B

-B

+B

-B

PLL DATA

PLL CE

S-METER

SW5V

SW5V

DATA C

BACK UP

750mV

4500mV

CHANGER

AM

4.5V PRE
2250mVFM

160mV

1200mV

1200mV

213mV (E TYPE)

400mV (K TYPE)

RDS OUT

FM+B

NOISE

4500mVCD

K TYPEMODE

4500mV

4500mV

1069mV

1715mV

E TYPE

3600mV

600mV

1800mV

3600mV

K TYPE E TYPE

3600mV

1372mV

855mV

3600mV

1.8V PRE

SRM SUB­SRM SUB+

DRIVER

MUTE

BU5V

PANEL 5V

DIMMER PWM CONTROL

ILLUM +B IS LCD ONLY

RST

L DATAL

L CLK

L CE

L DATAS

DIMMER

(X86)

BLOCK DIAGRAM

2

KDC-7080R/RY/RV/RYV

MICROCOMPUTER’S DESCRIPTION

System µ-com : UPD784217GC (X25-)

Terminal description

No. Pin name Function I/O Description Processing Operation

1 P120/RTP0 CHCON1 O Changer 1 control Active : Hi
2 P121/RTP1 CH_MUTE I Changer muting input MUTE Requested : Hi
3 P122/RTP2 REQH O Handshake request to changers Active : Lo
4 P123/RTP3 ILL_ON O Illumination output Active : Hi
5 P124/RTP4 NC O Open
6 P125/RTP5 CD_SW2 I 12cm DISC detection ON : Lo
7 P126/RTP6 CD_SW1 I Loading detection ON : Lo
8 P127/RTP7 NC O Open

9 Vdd Vdd - Positive power supply
10 X2 X2 - Main clock connection
11 X1 X1 - Main clock connection
12 Vss Vss - GND
13 XT2 XT2 - Sub clock connection
14 XT1 XT1 - Sub clock connection
15 RESET RESET I Reset input Active : Lo
16 P00/INTP0 CH_RST O Changer reset output Active : Lo
17 P01/INTP1 R_CLK I RDS clock input
18 P02/INTP2/NMI REQC I Handshake request from changer Active : Lo
19 P03/INTP3 N C I/O
20 P04/INTP4 N C I/O
21 P05/INTP5 N C I/O
22 P06/INTP6 SC_REQ I Handshake request from panel µ-com
23 AVdd AVdd - A/D analog power supply
24 AVref0 AVref - A/D reference voltage input

25 P10/ANI0 PHONE I PHONE detection terminal
26 P11/ANI1 SRM_SW1 I SRM position detection Open : Hi

27 P12/ANI2 NOISE I FM noise detection Analog input
28 P13/ANI3 SMETER I FM signal meter detection Analog input
29 P14/ANI4 IF_MODE I K2I IF selector Wide : Hi / Narrow : Lo
30 P15/ANI5 NC I GND
31 P16/ANI6 M_MUTE_R I Mute request from meshanism Mute requested : Lo
32 P17/ANI7 M_MUTE_L I Mute request from meshanism Mute requested : Lo
33 AVss AVss - A/D GND
34 P130/ANO0 EXT_AMP O EXT_AMP control
35 P131/ANO1 M_RST O Reset output to mechanism Reset : Lo
36 AVref1 - D/A reference voltage input
37 P70/RxD2/SI2 DATAC I Data line from changer
38 P71/TxD2/SO2 DATAH O Data line to changer
39 P72/ASCK2/SCK2 CH_CLK I/O Clock line from/to changer
40 P20/RxD1/SI1
41 P21/TxD1/SO1
42 P22/ASCK1/SCK1 L_CLK/MC_CLK I/O Clock line to LCD driver
43 P23/PCL M_STOP I/O Stop request to mechanism Stop Requested : Lo
44 P24/BUZ BEEP O Beep output Active : Hi
45 P25/SI0 PLL_CE O CE output to PLL
46 P26/SO0 PLL_DATA I/O Data in/out with PLL
47 P27/SCK0 PLL_CLK O Clock output to PLL
48 P80/A0 CD_SW3 I Switch detection ON : Hi
49 P81/A1 LO/EJ O Loading/Eject control Loading : Lo / Eject : Hi

L_DATAL/SC_DATA
L_DATAS/MC_DATA

I Data line from LCD driver

O Data line to LCD driver

1V or less : PHONE

2.5V or more : NAVI MUTE

3

KDC-7080R/RY/RV/RYV

MICROCOMPUTER’S DESCRIPTION

No. Pin name Function I/O Description Processing Operation

50 P82/A2 MOSW O Motor output Loading : Hi / Eject : Lo
51 P83/A3 MECH_DET I Mechanism detection ON : Hi / OFF : Lo
52 P84/A4 PAN 5V O Panel detection OFF : Hi
53 P85/A5 L_CE/P_RST O CE to LCD driver / Panel µ-com reset
54 P86/A6 L_INH/MC_REQ O Reset to LCD driver
55 P87/A7 DIM_CON O DIM control
56 P40/AD0 QUAL I RDS receiving condition Good : Hi
57 P41/AD1 R_DATA I RDS data input
58 P42/AD2 SRM_SUB– O SRM sub motor output
59 P43/AD3 SRM_SUB+ O SRM sub motor output
60 P44/AD4 SRM_DET I SRM mechanism detection ON : Lo / OFF : Hi
61 P45/AD5 SRM_SW2 I SRM eject detection

62 P46/AD6 FM_SD I FM SD input
63 P47/AD7 NC O Open

64 P50/A8 AFC O Noise detection time constant switching
65 P51/A9 - O

66 P52/A10 WIDE O K2I Wide output Active : Hi
67 P53/A11 NARROW I/O K2I Narrow output Active : Hi
68 P54/A12 AM+B O AM power supply Active : Hi
69 P55/A13 FM+B O FM power supply Active : Hi
70 P56/A14 NC O Open
71 P57A15 NC O Open
72 Vss - GND
73 P60/A16 TYPE0 I Destination type switch
74 P61/A17 TYPE1 I Destination type switch
75 P62/A18 TYPE2 I Destination type switch
76 P63/A19 ST_TYPE0 I IC2 Var. 3 destination type 0 Initial value : Lo
77 P64/RD ST_TYPE1 I IC2 Var. 3 destination type 1 Initial value : Lo
78 P65/WR NC O Open
79 P66/WAIT PRE MUTE R O Audio mute Active : Lo
80 P67/ASTB PRE MUTE L O Audio mute Active : Lo
81 Vdd - Positive power supply
82 P100/TI5/TO5 NC O Open
83 P101/TI6/TO6 SVR O Power IC reset Power ON : Lo
84 P102/TI7/TO7 NC O Open
85 P103/TI8/TO8 P_MUTE O Power IC muting Active : Lo
86 P30/TO0 ANT_CON O Antenna control Active : Hi
87 P31/TO1 IC2_SCK O IC2, IC5, EEPROM clock line
88 P32/TO2 DIMMER I Dimmer detection Active : Lo
89 P33/TI1 P_CON O Power control Active : Hi
90 P34/TI2 ACC_DET I ACC detection ACC OFF : Hi
91 P35/TI00 REMO I Remote control input
92 P36/TI01 P_ON O µ-com peripheral power supply Active : Hi
93 P37 BU_DET I Momentary power down detection
94 TEST Å\ - Test GND
95 P90 IC2_SDA I/O IC2, IC5, EEPROM data line
96 P91 MUTE O Muting output Active : Hi
97 P92 SW5 O 5V power supply Active : Lo
98 P93 MS_CL O CD mechanism clock line
99 P94 MS_DA I/O CD mechanism data line

100 P95 Å\ O

4

: Eject

↑

Station detected : Hi

Not detected : Lo

During reception : Hi

During search : Lo

Momentary power down : Hi

KDC-7080R/RY/RV/RYV

TEST MODE

1. Entering the test mode

Reset the unit by pressing the FM key and the Preset 6
key at the same time.
When the test mode is entered, all indicators light up.

2. Releasing the test mode

Reset the unit by pressing the preset 6 key.
Note: The unit cannot be reset by simply turning ACC

off, turning power off, or turning power off for a
brief moment.

3. Voltage adjustment on the FM S-meter

(1) Enter the test mode.
(2) While pressing the Preset 1 key, keep on pressing

the Preset 6 key.

(3) When the adjustment is made, "ADJ OK" is dis-

played. When adjustment cannot be made, "ADJ
NG" is displayed.

4. Writing SD voltage for the AM

(1) Enter the test mode.
(2) While pressing the Preset 1 key, keep on pressing

the Preset 6 key, which results in writing SD.

5. Forced switching of K2I Auto/Manual

In tuner-mode, keeping on pressing TI key , and the Auto
and Manual modes can be switched. The initial condi­tion is in manual modes, which is indicated by flashing
DUAL dots.

6. Forced narrow/wide switching of K2I

In turner-mode, when Preset 6 is pressed, forced nar­row/wide mode switching is made. The initial condi­tion is in wide mode and the NEWS dot flashes.

7. CD receiver test mode specification

By pressing the track-up key, the unit jumps to the fol­lowing tracks:
No. 9→No. 15→No. 10→No. 11→No. 12→No 13→No.
14→No. 9 (Goes back to the first position.)
When the track-down key is pressed, the unit jumps to
the previous track.

8. MD test mode specification

After loading MD, the unit plays No. 7. Then, the unit
jumps as follows each time it trackups.
No. 2→No. 13→No.23→No.30→
NO.34→No. 7 (Goes back to the first position.)
When the track-down key is pressed, the unit jumps to
the previous track.

9. Tape test mode

In the initial step, the blank skip is turned off.

10. Audio-related items

• The volume is -10dB (on display, it is 30).

• The loudness is off and CRSC is off regardless of func­tions.

• Buss/treble and balance/fader are to be adjusted by
the up/down key to full-boost/fullcut and fullfront/
fullrear respectively.

• The high-pass filter is adjusted by the up-key to
throughput/100Hz/200Hz and, by the down-key, to
200Hz/100Hz/throughput.

• Other adjustments are the same as before.

11. Backup current measurement

When reset in ACC-off condition (backup is on), the mute
terminal goes off after 2 seconds instead of 15 seconds,
when the ACC is turned off in the test mode. (In this
case, the panel/CD/C/MD mechanisms are not activated.)

12. Registering security code after changing E2PROM at
the services (Only for type M. However, RDS models
are excluded)

(1) Put the unit into the test mode (Refer to 1. Above

for how to enter the test mode.)
(2) Press SRC key to put the unit into the tuner mode.
(3) Press Audio key for one second and put the unit into

the menu mode.
(4) Press FM/AM key and then select "SECURITY."
(5) Press track up/down key for full 2 seconds.
(6) Press Preset 1, Preset 2, Preset 3, and Preset 4 and

then input codes.

Example: Inputting "3510."

• Press 1 key 4 times.

• Press 2 key 6 times.

• Press 3 key 2 times.

• Press 4 key once.

(7) Press DISP key for 3 seconds and confirm that

"APPRODVED" is displayed.
(8) Release the test mode. (Refer to "2. Releasing the

test mode" above.)

5

KDC-7080R/RY/RV/RYV

TEST MODE

13. Simplified method for clearing the security code
(Only for type K)

(1) When code is requested, continue pressing VOL UP

key for three seconds while pressing the DISP key.
(--- disappear.)

(2) Input "KCAR," using the remote controller (the same

as the 98 Model)

• Press Tenkey 5 twice and then press track-up key.
(Inputting "K")

• Press Tenkey 2 three times and then press track­up key. (Inputting "C")

• Press Tenkey 2 once and then press track-up key.
(Inputting "A")

• Press Tenkey 7 twice and then press track-up key.
(Inputting "R")

(3) Then, the security is released and the unit goes into

the Tuner Mode.

14. Writing MASK KEY on line

(1) While pressing the FM key and Preset 6 key, press

reset key to enter the test mode.

(2) Press AUDIO key for full one second to put the unit

into the menu mode.
(3) Select the "MASK KEY ," using the FM key or AM key .
(4) Press on the track up/down key to display "TRANS-

MIT 1."
(5) Point the MASK KEY to the light receptor and press

it for 0.5 second or longer.
(6) When "TRANSMIT 2" is displayed, press MASK KEY

for 0.5 second or longer. When this is conducted,

the counter codes for the first time and the second

time will not be compared.
(7) When "APPROVED" is displayed, writing is com-

pleted. time the demonstration mode is set and the

test mode is released.

Note: After an elapse of 30-minute period, during

which no code is written, an error is effected
and the device will power off.

15. Releasing MASK KEY requests (When reset or backup
is off when MASK KEY is approved)

(1) When power is turned on, "TRANSMIT 1" is dis-

played and the unit goes into MASK KEY request
mode.

(2) Point the MASK KEY to the light receptor and press

it for more than 3 seconds (until the level display
indicates full)

(3) When "TRANSMIT 2" is displayed, press the MASK

KEY again for more than three seconds. At this point,
when "TRANSMIT 1" is displayed, repeat the pro­cess in (2) above for the second time.

(4) When "APPROVED" is displayed, MASK KEY is ap-

proved and the unit turns power on.

(E2PROM in initial condition)

16. Initializing MASK KEY (returning to the default condi­tion from MASK KEY approved state)

(1) While pressing the FM key and Preset 6 key at the

same time, press RESET to enter the test mode.

(2) "TRANSMIT 1" is displayed and the unit goes into

MASK KEY request mode. The display at this point
will be "**" instead of "[ ]".

(3) Use MASK KEY release remote controller for more

than three seconds.

(4) When "TRANSMIT 2" is displayed, press the MASK

KEY for more than three seconds for the second
time.

(5) When "APPROVED" is displayed, the MASK KEY is

released and the demonstration mode is set. Then,
the test mode is released, returning the unit into de­fault condition.

17. Clearing from the MASK KEY

(1) While pressing FM key and Preset 6 key at the same

time, press RESET to enter the test mode.

(2) Press the AUDIO key for full one second to put the

unit into the menu mode.
(3) Select MASK KEY, using track up/down key.
(4) Press on the FM key or AM key for full two seconds

and the unit will display "TRANSMIT 1."
(5) Point the MASK KEY release controller to the light

receptor and press it for 3 seconds or longer. (Until

the level display indicates full.)
(6) When "TRANSMIT 2" is displayed, press MASK KEY

for 3 seconds or longer for the second time. If

"TRANSMIT 1" is displayed, start again from (5)

above.
(7) When "APPROVED" is displayed, E2PROM is cleared.

The unit goes back to the condition described in Line

14: Writing MASK KEY on line (E2PROM in initial

condition)

18. Other

• Automatic panel closing does not occur in case a

TAPE, CD, or MD is inserted.

•

Panel is opened/closed when A TT key is tur ned On/Off.
( A remote controller is used when turning ATT on.)

• The DNPP/SBF key of the remote controller (RC-510)

is used for tuning the menu mode On/Off.

• The OPEN/CLOSE key of the remote controller (RC-

510) is used for tuning the audio mode On/Off.

• The feed on the menu will be feeds only for neces-

sary features.

• "CODE OFF" and other displays will not be issued

when the power is turned on.

• The dimmer of the FL model and contrast on the LCD

model can be adjusted only for 0/5/10 by the UP/
DOWN key.

6

KDC-7080R/RY/RV/RYV

ADJUSTMENT

Set the controls and switch as follows.
BALANCE : center position BASS : center position LOUD : OFF
FADER : center position TREBLE : center position

TUNER

(RECEIVER)

SETTINGS

ALIGNMENT

POINTS

No. ITEM

FM SECTION

INPUT

SETTINGS

OUTPUT

SETTINGS

ALIGN FOR

FIG.

1

SEPARATION

(NARROW)

98.1MHz

1kHz, ±40kHz dev

Point : ±6.0kHz dev

Selector : L or R

60dB µ(ANT input)

Connect an

AC voltmeter

to SP OUT

J1

TEST MODE:ON
(Forced Narrow)

FM 98.1MHz

SEPARATION

(X25-)

VR1

VR1

Adjust it so that the crosstalk
from L to R and R to L become
minimum.

F/E

FRONT

7

A B C D E

1

PC BOARD

(FOIL SIDE VIEW)

(COMPONENT SIDE VIEW)

X13-972X-XX (J74-0984-12)

R17

KS3

AM

R16

ILL+B

R22

R20

KI5

CLKAUD

S12

KS2

S8

D6

2

14

S21

SRC

S19

S17

D5

2

S18

EJECT

15

CN1

1

FM

C13

L DATAS

CP1

L CE

S16

L CLK

S5

S4

L DATAL

ED1

3

65119

REMO

R6
R8

R29

26

25

R24 R23

Q4

Q3

EB EB

50

51

S2

S13

DISCAUTO653421ATT

IC2

S11

1

100

R14R13

4

VDD

C8

C12

C9

R11

C10

R12

75

76

R15

DGND

C11

S10

ILL+B

CLK

S12

KS2

AUD

S8

AUTO 6DISC

X13-972X-XX (J74-0984-12)

R17

KI5

R22

R20

S13 S11S2

S10

KS3

AM

L DATAL

R16

ED1

64

L CLK

Q4

Q3

S4

S5

DGND

CP1

51

75

S16

EBEB

50

76

C13

L CE

R15

FM

15

L DATAS

CN1

1

R23

R24

C11

IC2

C10

EJECT

S19

S17

S18

R6
R8

R13R14

C9

R29

R12

SRC

C12

R11

REMO

26

25

1

100

C8

D6

14

S21

D5

2

65

VDD

R30

DIMMER

LOCK SW

5

26

120

25

1

100

139

C6

R1

6

C1

C4

C5

D4

Q5

C15

Q6

EB

R25

R19

S14

7

R27

D1

EB

Q8

50

5175

C17

R10

IC1

KS4

C2

C16

Q2

Q7

IC3

R4

C3

E

EB

B

B

E

ILL G

Q1

76

R5

KI3

D3

RESET

KI2

C14

1

R26

R28

KI1

R31

3

S15

R3

R2

B

E

D2

2

C19

4

S22

KS1

KI4

KS5

C7

R21

18 9 1819 64

R18

R9

S23

S9

S7

S3

S1

S6

S20

OPEN

RESET

IC Q

address

15A
37B

16A
26A
33B
43B
56A
67A
77B
85B

345

2

1

ATT

OPEN

S7S9

S3

S6S1

S20

RESET

R21

KS1

KI4

R18

S23

891819

1

KS5

RESET

R9

S15

KI1

KS4

KI3

D3

C14

C7

Q8

S22

KI2

R26

51

75

R31

R27

BE

50

76

R5

ILL G

R28

R30

D1

C17

DIMMER

LOCK SW

R10

119

26

120

25

IC1

1

100

Q5

BE

R1

Q6

R19

C4

S14

139

C6

C1

IC Q

D4

C15

address

15D
37D

16D
26D
33D
43D
56D
67D
77D

R3

R4

R2

C2

C3

B

C5

Q1

E

B

B
E

E

D2

Q2

C16

1

2

Q7

C19

R25

BE

4

3

IC3

85D

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

8