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 Regulation No.21 CFR 1040.10, Chapter 1,
Subchapter J.
DANGER : Laser radiation when open and interlock
defeated.
AVOID DIRECT EXPOSURE TO BEAM.
Illustration is DMF-3020.
* Refer to parts list on page 23.
STEREO MINIDISC RECORDER
DMF-3020/3020(S)/5020
MD-203
SERVICE MANUAL
©1998-9/B51-5480-00 (K/K) 2945
REC
IN
R
L
R
L
PLAY
OUT
(VARIABLE)
PLAY
OUT
OPT.
COAX.
REC
IN
2 COAX.
1 OPT.
LINE
SYSTEM
CONTROL
DIGITAL
MIN
REC LEVEL
PHONES
ENTER
/TIME DISPLAY
REC MODE/CHARAC.
SET
REC INPUT
MONITOR
/DELETE
STANDBY
POWER
JOG DIAL
TITLE INPUT
EDIT/SPACE
MAX
DISC LO ADING ME CHANISM
STEREO MINIDISC RECORDER
1
3
7
¡
0
- ON OFF
TIMER
REC OFF PLAY
OUTPUT
LEVEL
4¢
REC
Phone jack *
(E11-)
Knob
(K29-7536-04)
Panel
(A60-1530-11)
Indicator
(B12-0353-04)
Knob
(K27-2178-04)
Phono jack
(E63-1065-05)
Metallic cabinet
(A01-3635-01)
Miniature phono jack
(E11-0293-05)
Phono jack
(E63-0160-05)
Optic receiving module
(W02-1181-05)
Oscillating module
(W02-1114-05)
AC power cord *
(E30-)
Power cord bushing
(J42-0083-05)
Filter
(B11-0376-04)
Front glass
(B10-3426-03)
Escutcheon *
(B07-)
Knob
(K29-7412-02)
Knob
(K29-7412-02)
Knob
(K29-7354-14)
KENWOOD badge
(B43-0302-04)
Refer to 1050MD/DM-5090/DM-9090 service manual
(B51-5387-00) if you see the mechanism test mode.
DMF-5020(K)COVER1,1P( 98.12.916:39 y[W 2
Caution on condensation
Condensation (of dew) may occur inside the unit when there is a great
difference in temperature between this unit and the outside.
This unit may not function properly if condensation occurs. In this
case, leave the unit for a few hours with the power left ON, and
restart the operation after the condensation has dried up.
Be specially cautious against condensation in a follow-
ing circumstance:
When this unit is carried from a place to another across a large
difference in temperature, when the humidity in the room where this
unit is installed increases, etc.
Memory backup
The typical period for which the memory can be backed up while the
power cord is unplugged or the
POWER key is set to the OFF position
is about 3 weeks, though this may be variable depending on the
surrounding environment.
In case of long hours of power failure or slipping out of the power cord,
the data related to recording and editing (that is usually recorded at the
moment the Mini Disc is ejected) may be cleared or destroyed before
it is written in the Mini Disc. Remember that the data lost cannot be
recovered.
After recording or editing, be sure to eject the Mini Disc so that the
recording or editing data can be written in the disc.
Operation to reset
The microprocessor may fall into malfunction (impossibility to operate
erroneous display, etc.) when the power cord is unplugged while power
is ON or due to an external factor. In this case, execute the following
procedure to reset the microprocessor and return it to normal condition.
With the POWER key left to ON, unplug the power cord
from the power outlet then, while holding the eject (
0)
key depressed, plug the power cord again.
÷ Please note that resetting the microprocessor clears the contents
stored in, it returns the microprocessor to the condition when it left
the factory.
Before transporting or moving this unit, carry out the
following operations.
1. Set the POWER key to ON without loading a Mini Disc.
÷ Check that no disc is present in the unit.
2. Wait a few seconds and verify that the display shown
appears.
3. Set the POWER key to OFF.
Note related to transportation and
movement
NO
D I S C
DMF-3020/3020(S)/5020/MD-203
2
CONTENTS/ACCESSORIES/CAUTIONS
CONTENTS/ACCESSORIES/CAUTIONS ...................2
CONTROLS .................................................................3
BLOCK DIAGRAM .......................................................5
CIRCUIT DESCRIPTION .............................................6
PC BOARD ................................................................. 8
SCHEMATIC DIAGRAM ........................................... 11
EXPLODED VIEW .....................................................21
PARTS LIST...............................................................23
SPECIFICATIONS .......................................Back cover
CONTENTS
Remote control unit (1)
RC-M0705
(A70-1238-05)
(A70-1239-05)
Battery cover (A09-1116-08)
Battery cover (A09-0374-08)
(For DMF-5020)
Batteries (2)
R03 ("AAA"-size) batteries (For RC-M0705)
R6 ("AA"-size) batteries (For RC-M0302)
Check that the following accessories are present.
Audio
(E30-0505-05)
(E30-2733-05)
(B19-1529-05)
cord (2)
System control cord (1)
Optical fiber cable (1)
Remote control unit (1)
RC-M0302 (For DMF-3020/MD-203)
Accessories
Cautions
Refer to the Service manual, if you see the IC40, 41 on the X25 (PCB)
PCB
Ref No.
Parts No.
Refer to Service manual
Parts No.
Page
X25
IC40
KAN06
DV-203/2070, DVF-5010/9010/K7010
B51-5456-00
20
X25
IC41
PCM1716E
DV-203/2070, DVF-5010/9010/K7010
B51-5456-00
21
DMF-5020(K)COVER1,1P( 98.12.916:39 y[W 3
DMF-3020/3020
(S)/5020/MD-203
3
CONTROLS
1POWER key
: Press to turn the unit ON and OFF.
: The unit may enter the standby mode when the POWER key
is pressed to turn it ON. This is because the unit holds the
memory that it has been put to the standby mode by the
remote control unit in the last operation.
2Remote control sensor
3 Mini Disc insertion slot
: When a Mini Disc is inserted while the unit is in the standby
mode, it is turned ON automatically.
4 Eject (0) key
: Press to eject the Mini Disc.
5Stop (7) key
: Press to stop playback or recording.
6Play (3) key
: Press to start playback.
7 Manual search down (1) key
: This key functions as the fast reverse key during playback.
: During an editing mode, press to move the title input cursor
or to scroll the track title display to the left.
8 Manual search up (¡) key
: This key functions as the fast forward key during playback.
: During an editing mode, press to move the title input cursor
or to scroll the track title display to the right.
9Pause (8) key
: Press to let playback or recording pause temporarily.
0REC LEVEL knob
: Rotate to adjust the analog recording level.
!TIMER switch
: This switch is used in timer playback and timer recording.
@TITLE INPUT key
: Press to switch the title input mode ON/OFF.
# REC INPUT key
: Press to switch the recording input line between digital
(optical/coaxial), analog and monaural.
$ MONITOR/DELETE key
MONITOR
: Press to monitor the sound being input from the source
while the unit is in stop mode.
DELETE
: During title editing, press to delete a character. During track
editing, press to delete a track.
%REC MODE/CHARAC. (Character) key
REC MODE
: Press to switch the recording setting adjustment modes
(record modes) ON/OFF.
CHARAC.
: Press to select a character group during the title input
operation.
Description of main unit keys
^SET key
: For use in setting the editing result and input title in memory.
: When pressed in the recording pause mode, the MEMORY
REC function is set and recording starts from the sound
approximately 6 seconds before the current sound.
&JOG DIAL
Skip down (
4)/ Skip up(¢) knob
: During playback, rotate to skip tracks.
: Before starting recording in record mode, rotate to select the
recording setting adjustment mode.
: During title search, rotate to select a track number.
: During title input, rotate to select a track number or a
character.
: During editing, rotate to select the editing mode or a track
number.
*ENTER/TIME DISPLAY key
ENTER
: For use in executing the editing and title input operations.
TIME DISPLAY
: Press to switch the time and title display modes.
(EDIT/SPACE key
EDIT
: Press to switch the editing mode ON/OFF.
SPACE
: Press to insert a blank space character during the title input
operation.
)OUTPUT LEVEL DOWN (fi) key
: Use this to decrease the volume of the headphones and the
output level.
¡OUTPUT LEVEL UP (%) key
: Use this to increase the volume of the headphones and the
output level.
TM Record (¶) key
: Press to start recording.
In stop mode
: When the
¶ key is pressed while a recordable disc is present
in the unit, it enters record-pause mode.
(It enters record-pause mode at the position immediately
after the last existing track.)
In record-pause mode
: When the
¶ key is pressed, the SOUND SYNCHRO REC
standby mode is set.
: In the SOUND SYNCHRO REC standby mode, the set
functions in the same way as in the normal recording pause
mode.
£PHONES jack
: Connect stereo headphones (optional) here.
MIN
REC LEVEL
PHONES
ENTER
/TIME DISPLAY
REC MODE/CHARAC.
SET
REC INPUT
MONITOR
/DELETE
STANDBY
POWER
JOG DIAL
TITLE INPUT
EDIT/SPACE
MAX
DISC LO ADING ME CHANISM
STEREO MINIDISC RECORDER
1
3
7
¡
0
- ON OFF
TIMER
REC OFF PLAY
2
3
4 5 6 7
@ # $
^
£
)
&
8
0
(
¡TM
*
!%
IN
REPEAT
FADE
OVER
OUT
OVER (
-dB)
(
-dB)
MONO
MANUAL
A . PAUSE
R
L
REMAIN
TOTAL
SINGLE
COPY
TITLE
· · · · · · · · · · · ·
9
12
7
5
1
3
40
30
21
18
0
15
18
12
9
3
6
40
30
27
24
15
21
0
SEARCH
PGM
MONITOR
ANALOG
32kHz
2
13
48kHz
44.1kHz
DIGITAL
19
OUTPUT
LEVEL
4¢
REC
While the standby indicator of the unit is lit, a small amount of current is flowing into the unit's internal circuitry to back up the memory.
This condition is referred to as the standby mode of the unit. While the unit is in the standby mode, it can be turned ON from the remote
control unit.
Standby mode
Display / Main unit
Display
TITLE and SEARCH indicators
MONO indicator
PGM (Program) indicator
Peak level indicators
Listening through headphones
Plug the stereo headphones (with standard-plug) available in audio
stores into the
PHONES jack and adjust the listening volume with the
OUTPUT LEVEL control on the front panel. The default value is 0 dB
(maximum volume).
ANALOG input indicator
DIGITAL input 1/2 indicators
REPEAT indicator
SINGLE, TOTAL and
REMAIN indicators
Character information
display
A. PAUSE indicator
MANUAL indicator
MONITOR indicator
Operation indicators
¶ REC indicator
8 Pause indicator
3 Play indicator
Sumpling frequency
indicators
OUTPUT
LEVEL
DMF-5020 only
DMF-5020(K)
COVER1,1P(
98.12.9
16:39
y[W
6
DMF-3020/3020
(S)/5020/MD-203
4
CONTROLS
1Numeric keys / Character editing keys
Numeric keys
0-9
: Press when selecting a track number
directly.
+10
: Press when selecting a track number
10 or more.
+100
: Press when selecting a track number
100 or more.
: These keys are also used to select a
character or symbol during title editing.
CHARACTER DELETE / CLEAR key
CHARACTER DELETE
: During title input, press to delete a
character.
CLEAR
: During editing, press to clear a selected
track number.
: In program mode, press to clear the
program.
CHARACTER SPACE / CHECK key
CHARACTER SPACE
: During title input, press to insert a blank
space character.
CHECK
: In program mode, press to check the
program contents.
CHARA. (Character)/ P.MODE (Play
Mode) key
CHARA.
: Press to select a character group dur-
ing the title input operation.
P.MODE
: Press to initiate the program mode.
5Editing mode keys
REC INPUT key
: Press to switch the recording input line
between digital (optical/coaxial), analog
and monaural.
EDIT key
: Press to switch the editing mode ON/
OFF.
SET key
: This key is used in the title assignment or
editing operations.
: When pressed in the recording pause
mode, the MEMORY REC function is set
and recording starts from the sound ap-
proximately 6 seconds before the cur-
rent sound.
ENTER key
: Press to execute editing or enter the
input title in memory.
7Applied operation keys
EDIT CANCEL key
: Press to cancel the editing operation.
TITLE INPUT key
: Press to switch the title input mode ON/
OFF.
TITLE SEARCH key
: Press to switch the title search mode
ON/OFF.
: During title editing, press to switch the
title change input mode between the
"overwrite mode" and "insert mode".
TIME DISPLAY key
: Press to switch the time and title display
modes.
AUTO PAUSE key
: When this key is pressed, the pause
mode is initiated automatically at the
point where the track number changes
during playback.
: When pressed in the recording or record-
ing standby mode, the AUTO REC PAUSE
mode is turned on.
AUTO/MANU. key
: Selects whether the track numbers are
to be marked automatically during re-
cording (AUTO) or to be marked manu-
ally after it (MANUAL).
MONITOR key
: Press to monitor the sound being input
from the source while the unit is in stop
mode.
METER MODE key
: Press to switch the level meter display
contents.
Remote control unit (DMF-3020/MD-203)
The remote control unit incorporates the basic operation keys as well as a variety of applied operation keys so that it can be
used in a wide range of purposes.
The keys on the remote control unit with the same names as on the main unit have the same function as the keys
on the main unit.
Model: RC-M0302
Infrared ray system
3REPEATkey
: Press to switch the repeat modes for
repeat playback.
RANDOM key
: Press to initiate the random play mode.
2ON/STANDBY key
: Press to turn the unit between ON and
STANDBY ( /
) modes.
6Basic operation keys
¶
: Record key
8
: Pause key
7
: Stop key
3
: Play key
CURSOR /
1 , ¡ keys
1 , ¡
: During playback, press to fast forward
or fast reverse the play.
CURSOR
: During title input, press to move the
cursor.
CHARACTER/SEARCH/
4 , ¢ keys
CHARACTER
: Press to select a character group dur-
ing the title input operation.
SEARCH
: During title search, rotate to select a
track number.
4 , ¢
: During playback, press to skip tracks in
the forward or reverse direction.
ABC
1
DEF
23
JKL
MNO
5
GHI
46
TUV
WXY
8
PRS
79
POWER
EDIT
CANCEL
QZ
0
+100
+10
RANDOM
REPEAT
SPACE
CHARA.
CHECK
DELETE
CLEAR
P.MODE
EDIT
SET
REC INPUT
ENTER
87
¡
14
¢
AUTO
PAUSE
AUTO
/MANU.
METER
MODE
TIME
DISPLAY
OUTPUT
LEVEL
MONITOR
REMOTE CONTROL UNIT
RC-M0302
CURSOR
TITLE
CHARACTER
/SEARCH
CHARACTER
%
fi
÷
£
INPUT
SEARCH
2
3
4
5
6
7
1
4OUTPUT LEVEL (%fi) keys
: Use these to adjust the output level and
the volume of the headphones.
3Character editing keys
TIME DISPLAY key
: Press to switch the time and title display
modes.
CHARA. (Character)/ P.MODE (Play
Mode) key
CHARA.
: Press to select a character group dur-
ing the title input operation.
P.MODE
: Press to initiate the program mode.
DELETE / CLEAR key
DELETE
: During title input, press to delete a
character.
CLEAR
: During editing, press to clear a selected
track number.
: In program mode, press to clear the
program.
SPACE / CHECK key
SPACE
: During title input, press to insert a blank
space character.
CHECK
: In program mode, press to check the
program contents.
8EJECT (0) key
9Editing mode keys
EDIT CANCEL key
: Press to cancel the editing operation.
TITLE INPUT key
: Press to switch the title input mode ON/
OFF.
TITLE SEARCH key
: Press to switch the title search mode
ON/OFF.
: During title editing, press to switch the
title change input mode between the
"overwrite mode" and "insert mode".
SET key
: This key is used in the title assignment or
editing operations.
: When pressed in the recording pause
mode, the MEMORY REC function is set
and recording starts from the sound ap-
proximately 6 seconds before the cur-
rent sound.
ENTER key
: Press to execute editing or enter the
input title in memory.
EDIT key
: Press to switch the editing mode ON/
OFF.
Remote control unit (DMF-5020)
The remote control unit incorporates the basic operation keys as well as a variety of applied operation keys so that it can be
used in a wide range of purposes.
The keys on the remote control unit with the same names as on the main unit have the same function as the keys
on the main unit.
Model: RC-M0705
Infrared ray system
4MONITOR key
: Press to monitor the sound being input
from the source while the unit is in stop
mode.
METER key
: Press to switch the level meter display
contents.
RANDOM key
: Press to initiate the random play mode.
REPEAT key
: Press to switch the repeat modes for
repeat playback.
1ON/STANDBY key
: Press to turn the unit between ON and
STANDBY ( /
) modes.
6Recording-related keys
REC MODE key
: Press to switch the recording setting ad-
justment modes ON/OFF.
AUTO/MANU. key
: Selects whether the track numbers are
to be marked automatically during re-
cording (AUTO) or to be marked manu-
ally after it (MANUAL).
AUTO PAUSE key
: When this key is pressed, the pause
mode is initiated automatically at the
point where the track number changes
during playback.
: When pressed in the recording or record-
ing standby mode, the AUTO REC PAUSE
mode is turned on.
REC INPUT key
: Press to switch the recording input line
between digital (optical/coaxial), analog
and monaural.
EDIT CANCEL
MONITOR
÷
0
REC MODE
SET
1
GHI
4
PRS
7
+100
METER
AUTO/MANU.
INPUT
ABC
ENTER
2
JKL
5
TUV
8
QZ
0
RANDOM
AUTO PAUSE
SEARCH
DEF
EDIT
3
MNO
6
WXY
9
+10
REPEAT
8
REC INPUT
%
fi
CHARA.
DELETE
SPACE
TITLE
TMTM/CUR.L
CUR.R/
££
TIME
DISPLAY
OUTPUT
LEVEL
POWER
REMOTE CONTROL UNIT
RC-M0705
4
¢
£
7
CLEAR
CHECK
P.MODE
8
9
1
2
3
4
5
6
7
0
5Basic operation keys
3
: Play key
4 , ¢ : Skip down/up keys
¶
: Record key
7
: Stop key
8
: Pause key
7CURSOR / 1 , ¡ shuttle
CURSOR
: During title input, rotate to move the
cursor.
1 , ¡
: Use this during playback for forward and
reverse search.
2OUTPUT LEVEL (%fi) keys
: Use these to adjust the output level and
the volume of the headphones.
0Numeric keys
0-9
: Press when selecting a track number
directly.
+10
: Press when selecting a track number 10
or more.
+100
: Press when selecting a track number
100 or more.
: These keys are also used to select a
character or symbol during title editing.
DMF-5020(K)
COVER1,1P(
98.12.9
16:39
y[W
7
DMF-3020/3020
(S)/5020/MD-203
5
BLOCK
DIAGRAM
RF,TE,FE,SE
CONT,BUS
APC REF
I,J,
A,B,C,D,E,F
SPINDLE
FEED
FCS,TRK,SPIN,SLED PWM
AUDIO
SYSTEM
AC
TRK
FCS
VFL
DATA
LRCK
BCK
DATA IN/OUT
LRCK
BCK
+3.3V
MECHA: MDM-04 (X33-1100-00)
X25-618 (A/5) (B/5)
DMF-3020/5020
DMF-5020 ONLY
X25 (C/5) (D/5)
X25 (E/5)
MAIN
u-COM
UPD784215GF532
256K SRAM
IC31
POWER
TRANSFORMER
FILTER
LINE
AVR
AVR
AVR
AVR
ANALOG +3.3V
DIGITAL HEAD MOTOR
+5V
BACK-UP
ACIRC
DSP
SERVO
ATRAC
MEMO. CONT
(CXD2652AR)
(CXA2523AR)
RF AMP
IC1
SERVO
(BH6511FP)
MOTOR
DRIVER
IC2
IC8
M
M
M
PLAY POS. SW
DRAM
IC3
PICKUP
KMS-260A
FL
ED1
LC7571ONE
FL DOT MATRIX
DRIVER
IC23
KEY
MATRIX
TIMER SW
IC11
JOG
REC SW
REFRECT SW
PROTECT SW
START LIMIT SW
DISC IN SW
BUFFER
IC37
REG.
+3.3V
DIGITAL+5V
3.3
LOADING MOTOR
FEED
MOTOR
Q7
LASER DRIVE APC
DISC
MOTOR
DISC
IC35
LOADING MOTOR
DRIVER
TA8409S
PHONES
OUT
IN
ANALOG
COAX. IN
OPT. IN
COAX. OUT
OPT. OUT
CONTROL
SYSTEM
SL16
DIGTAL
INPUT
OUTPUT
DIGITAL
TEMP. DET.
AC
u-COM VDD
u-COM +5V
33V
FL AC
DIGITAL
IC5
HEAD
RECORDING
CONTROL
REMOTE
5.0
5.0
3.3
E PROM
2
HEAD DRIVER
3.3
5.0
NON REG: 16V
3.3V
4Mx1
SENSOR
DAC
ADC
DIGITAL
DIGITAL
512FS
KAN06
DAC
DRIVE
DIGITAL
DIGITAL
ANALOG
IC10
MUTE
Q17-20
LEVEL
REC
VR1
IC26
IC21 (1/3)
IC21 (2/3)
DIGITAL
IC21 (3/3)
IC10
IC6
IC36
CM1777M
A3
S18
S1
IC34
IC38
IC8
IC13
AMP
H.P
J4
A1
A2
J3
D1
Q1
Q7
Q11
Q13
IC22
IC40
IC41
IC39
SRAM +5V
SHUNT
OUT
IN
ANALOG
2V/0.4k
0.5V/22k
15~ 21dBm
0.5Vp-p/75
COAX.
DIGITAL (IN/OUT)
OPT.
DMF-5020(K)
COVER1,1P(
98.12.9
16:39
y[W
10