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COMPACT DISC PLAYER
DP-3080Mk
/3090
SERVICE MANUAL
© 1997-8/B51-5349-00 (K/K) 2172
In compliance with Federal Regulations, following are reproductions
of labels on, or inside the product relating to laser product safety.
KENWOOD-Corp. certifies this equipment conforms to DHHS
Regulations No. 21 CFR 1040. 10, Chapter 1, Subchapter J.
DANGER : Laser radiation when open and interlock defeated.
AVOID DIRECT EXPOSURE TO BEAM.
1
-ON ­STANDBY
P.MODE
CHECK
CLEAR
EDIT
TIME
DISPLAY
REPEAT
PEAK
SEARCH
2
345
6
7
8
9
0
DISPLAY
76
¢
4
¡
1
STOP
PLAY/PAUSE
+10
RANDOM
PHONES
0
Knob
(k29-6469-08)
Phone jack
(E11-0339-08)
L
R
OUTPUT
DIGITAL
OUTPUT
SYSTEM CONTROL
SL16 XS 8
OPTICAL
KENWOOD badge
(B43-0302-04)
Front glass
(B10-2403-08)
Dressing panel
(A21-3603-08)
Knob
(k29-6815-08)
Metallic cabinet
(A01-3356-08)
Power cord bushing
(J42-0200-08)
Phono jack
(E63-0188-08)
Slide switch
(S62-0069-08)
AC power cord *
(E30-)
Miniature phone jack
(E11-0333-08)
Optic receving module
(W02-2620-08)
Knob
(K29-6471-08)
Escutcheon
(B07-2388-08)
Panel *
(A60-)
Illust is DP-3080Mk
.
* Refer to parts list on page 14.
DP-3080Mk2(k) COVER( 98.4.26 2:56 PM y[W 2

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DP-3080Mk
/3090
2
CONTENTS / ACCESSORIES / CAUTIONS
DISASSEMBLY FOR REPAIR
Beware of condensation
When water vapor comes into contact with the surface of cold
material, water drops are produced.
If condensation occurs, correct operation may not be possible, or
the unit may not function correctly.
This is not a malfunction, however, the unit should be dried.
To do this, turn the ON/STANDBY switch ON and leave the unit
as it is for several hours.
Accessories
Contents
Audio cord ...........................................(1)
(E30-2841-08)
AC plug adaptor .................................(1)
(E40-9981-08) M type only
Remote control unit ..........................(1)
(A70-1181-08) : RC-P03050
Battery cover (A09-0356-08)
Batteries (R6/AA) ................................(2)
CONTENTS / ACCESSORIES / CAUTIONS ............. 2
DISASSEMBLY FOR REPAIR .................................. 2
CIRCUIT DESCRIPTION .......................................... 3
ADJUSTMENT ........................................................... 4
PC BOARD ............................................................... 5
SCHEMATIC DIAGRAM ............................................ 7
EXPLODED VIEW .................................................. 12
PARTS LIST..............................................................14
SPECIFICATIONS ....................................................17
REMOTE
CONTROL
UNIT
RC-P0505
System control cord..........................(1)
(E30-2629-05)
Cautions
1
2
3
4
5
6
7
8
9
10
11 12
13
14 15
16 17
18
19 20
TRACK
no d sc
1
Be especially careful in the following conditions:
¶ When the unit is brought from a cold place to a warm place, and
there is a large temperature difference.
¶ When a heater starts operating.
¶ When the unit is brought from an air-conditioned place to a place
of high temperature with high humidity.
¶ When there is a large difference between the internal temperature
of the unit and the ambient temperature, or in conditions where
condensation occurs easily.
Note related to transportation and movement
Before transporting or moving this unit, carry out the following
operations.
1. Turn the power ON but do not load a disc.
2. Verify that the display shown appears.
3. Wait a few seconds and set the unit to STANDBY mode.
How to remove the CD tray.
5 Remove the CD mechanism from unit before this step.
1. Remove the 2 screws (
1), then remove the clamper
fram.
2. Turn the gear (
2) under the tray, then remove the tray
on the position A (
3).
3. Remove the guide frame (
4), then remove the collar of
the leaf switch in the left direction (
5).
4. While raising the click on the left-rear side of the tray (
6),
pull out the tray (
7).
1
1
2
3
6
4
7
CP401
CP201
5
position
"A"
DP-3080Mk2(k) COVER( 98.4.24 2:42 PM y[W 3

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DP-3080Mk
/3090
3
CIRCUIT DESCRIPTION
Pin No.
Pin name
I/O
Description
1
GFS
I
NOT USED
2
RMC
I
REMOCON INPUT PRT
3-5
­
I
NOT USED
6
MUTE
O
DIGITAL MUTE
(ON: "H")
7
MLEN
O
TC9423F LATCH CONTROL
8
MCK
O
TC9423F CLOCK CONTROL
9
SENS
I
SENSE INPUT FROM CXD2507
10
MDT
O
TC9423F DATA CONTROL
11
SQCK
O
CLOCK TO READ Q_DATA
12
SUBQ
I
Q_DATA INPUT PORT
13
­
O
NOT USED
14-17
KR0-KR3
I
KEY INPUT PORT
18
OPEN_M
O
OPEN MOTOR
(ACTIVE "L")
19
CLOSE_M
O
CLOSE MOTOR
(ACTIVE "L")
20
MON
O
SPINDLE MOTOR ON "H"
21
­
O
NOT USED
22
DATA
O
DATA OUT TO CXD2507
23
XLT
O
LATCH OUT TO CXD2507
24
CLK
O
CLOCK OUT TO CXD2507
25
FOK
I
FOCUS OK INPUT PORT
26
LDON
O
LASER OUTPUT
(ON: "L")
27
A_MUTE
O
ANALOGUE MUTE
(ON: "H")
28
XRST
O
IC RESET PORT
29
AD_IN
I
A/D CONVERT INPUT PORT
30
RESET
­
(RESET)
31
XI
­
(XTAL1)
32
XO
­
(XTAL0)
33
Vss
­
(GND)
34-46
­
O
NOT USED
47-57
S11-S1
O
FL SEGMENT PORT
58-61
­
O
NOT USED
62-70
G9-G1
O
FL DIGIT PORT
71
Vfdp
­
FL DRIVER POWER (-26V)
72
Vdd
­
(+5V)
73
NC
­
CONNECTED TO Vdd
74
FED_SW
I
LIMIT SWITCH
(ON: "L")
75
MODE_SW
I
8/16BIT
(L: 8BIT , H: 16BIT)
76
S_DATA
I/O
SYSTEM SERIAL DATA
77
S_BUSY
I/O
SYSTEM SERIAL BUSY
78
SCCR
I
SCOR FROM CXD2507
79
OP_SW
I
OPEN SWITCH
(ON: "L")
80
CL_SW
I
CLOSE SWITCH
(ON: "L")
1. Microprocessor ; (MAIN unit ; IC601)
1-1 Pin description
DP-3080Mk2(k) COVER( 98.4.24 2:42 PM y[W 7

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DP-3080Mk
/3090
4
ADJUSTMENT
No.
1
2
3
FOCUS
OFFSET
TRACKING
BALANCE
TRACKING
GAIN
TEST DISC
TYPE 4
Test disc
type4 Apply
signal of
1.2kHz
50mVrms to
TP301 pin5-6.
TEST DISC
TYPE 4
CONNECT AN
OSCILLOSCOPE
to TP301
CH1 : RF(1)
CONNECT AN
OSCILLOSCOPE
to TP301
CH1 : TE1(5)
CH2 : VC(4)
Connect a LPF to
TP301 pin 5-6 to
which you connect
an oscilloscope or
AC voltmeters.
STOP
PLAY
SHORT­CIRCUIT
TP2 WITH TP5
AFTER THE
ADJUSTMENT
REMOVE
SHORT­WIRE
PLAY
VR301
FE OFFSET
VR302
TE BALANCE
VR303
TE GAIN
DC=0V
SYMMETRY
BETWEEN
UPPER AND
LOWER
Two VTVMs
should read the
some value.
(e)
ITEM
INPUT
SETTING
OUTPUT
SETTING
PLAYER
SETTING
ALIGNMENT
POINT
ALIGN FOR
FIG.
1. WITH PRESSING PLAY/PAUSE (
6
6 ) TURN THE POWER ON TO ENTER THE TEST MODE.
2. SET THE TEST DISC TO DISC NO SONY YEDS­18. (TYPE4)
(e) Tracking gain
Note:
Type 4 disc : SONY YEDS-18 Test Disc or equivalent.
LPF: Around 47 k
+ 390 pF or so.
GND
TP301
1.2 kHz
50 mVrms
+
_
L.P.F.
+
+
L.P.F.
VTVM
VTVM
1
2
3
4
5
6
7
DP-3080Mk2(k) COVER( 98.4.24 2:42 PM y[W 8

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ACE
G
I
BD
F
H
J
2
1
3
5
7
4
6
Refer to the schematic diagram for the value of resistors and capacitors.
PC BOARD(Component side view)
5
6
DP-3080Mk2(K) PCB/SD( 98.4.24 2:37 PM y[W 2