KENWOOD MD203
Service Manual

DMF-3020/3020(S)/5020/MD-203
CONTENTS/ACCESSORIES/CAUTIONS
CONTENTS
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

Refer to the Service manual, if you see the IC40, 41 on the X25 (PCB) PCB X25 X25 Ref No. IC40 IC41 Parts No. KAN06 PCM1716E Refer to Service manual DV-203/2070, DVF-5010/9010/K7010 DV-203/2070, DVF-5010/9010/K7010 Parts No. B51-5456-00 B51-5456-00 Page 20 21

Accessories
Check that the following accessories are present.
Audio cord (2) (E30-0505-05) System control cord (1) (E30-2733-05) Optical fiber cable (1) (B19-1529-05)

Remote control unit (1) RC-M0705 (For DMF-5020) (A70-1238-05)

Remote control unit (1) RC-M0302 (For DMF-3020/MD-203) (A70-1239-05)

Batteries (2) R03 ("AAA"-size) batteries (For RC-M0705) R6 ("AA"-size) batteries (For RC-M0302)

Battery cover (A09-1116-08)

Battery cover (A09-0374-08)

Cautions

Note related to transportation and movement
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.

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.

2. Wait a few seconds and verify that the display shown appears. 3. Set the POWER key to OFF.

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.

NO

DISC

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.

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.

Be specially cautious against condensation in a following 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.

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