Kenwood DMF-3020 Service Manual

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( 98.12.9 16:39 y[W 3
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Kenwood DMF-3020 Specifications