MINIDISC RECORDER
DM-SE7/SE7(G)/SE9
SERVICE MANUAL
© 1997-11/B51-5395-00 (K/K) 3191
8
¶
4
1
¢
¡
7
0
3
minidisc recorder
rec
level
O.T.E.
on/standby
D.R.I.V.E.
L
R
DIGITAL IN
OPTICAL
SYSTEM
CONTROL
REC
IN
PLAY
OUT
1
2
Indicator
(B12-0318-04)
Escutcheon*
(B07-)
Optic receiving module
(W02-1181-05)
Rectangutar receptacle
(E08-0311-05)
AC power cord*
(E30-)
Metallic cabinet*
(A01-)
Power cord bushing
(J42-0083-05)
Phono jack
(E63-0120-05)
Knob*
(K29-)
Knob*
(K29-)
Panel*
(A60-)
Front glass
(B10-2372-03)
Illustration is DM-SE9.
* Refer to parts list on page 21.
In compliance with Federal Regulations, following are reproduc-
tions of labels on, or inside the product relating to laser product
safety.
KENWOOD-Crop. certifies this equipment conforms to DHHS
Regulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J.
DANGER : Laser radiation when open and interlock defeated.
AVOID DIRECT EXPOSURE TO BEAM
DM-SE9 2,COVER( 98.4.24 22:32 y[W 2
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, and the unit should be
dried.
(To do this, turn the POWER switch ON and leave the unit
as it is for several hours.)
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.
DM-SE7/SE7(G)/SE9
2
CONTENTS / ACCESSORIES / CAUTIONS
CONTENTS / ACCESSORIES / CAUTIONS ...............2
CIRCUIT DESCRIPTION .............................................3
PC BOARD ................................................................. 6
SCHEMATIC DIAGRAM ............................................. 9
EXPLODED VIEW .....................................................19
PARTS LIST...............................................................21
PARTS DESCRIPTIONS ...........................................27
SPECIFICATIONS .......................................Back cover
Audio cord
(E30-0615-05)
Accessories
Contents
Batteries (2)
Remote control unit
(A70-1153-05) : RC-MSE7
(A70-1169-05) : RC-MSE9
Battery cover (A09-0129-08 : RC-MSE9)
(A09-0356-08 : RC-MSE7)
System control cord
(E30-2628-05)
Optical fiber
(B19-1529-05)
AC plug adapter
(E03-0115-05)
Cautions
Note related to transprotaion and movement
Before transporting or moving this unit, carry out
the following operations.
1. With no disc loaded in the unit, press the "on /
standby" key to on.
· Check that no disc is present in the unit.
2. Wait a few seconds and verify that the display
shown appears.
3. Press the "on / standby" key to off (standby).
N O
D I S C
DM-SE9 2,COVER( 98.4.24 22:32 y[W 3
DM-SE7/SE7(G)/SE9
3
CIRCUIT DESCRIPTION
1. Main microprocessor : uPD784215GF506
1-1 Microprocessor periphery block diagram
PROTECT 23
REFLECT 20
DISCIN 25
STTLMT 24
PHOTSW 21
RECSW 19
LOADIN 32
LOADOUT 31
DRDT 73
DEMPH 77
DDQSY 48
DLAT 76
DSUB1 80
DSUB2 79
DWDT 74
DCLK 75
FLDCE 3
SRCLAT 78
VLCK 26
VLDT 63
VOLLAT 71
SBUSY 81
SDATA 82
KR1 54
KR2 55
KR3 56
INISW 58
1 A16
2 A17
84 AD0
: :
91 AD7
92 A8
: :
99 A15
5 RD
6 WR
7 CS
8 ASTB
33 SCHNG
13 SCL
34 SDA
28 XLAT
15 SENS
30 MNT0
14 MNT2
12 XRST
35 TX
27 RECP
29 MNT3
45 XINT
47 SQSY
48 DQSY
50 MNT1
65 SRDT
66 SWDT
67 SCLK
16 POWER
72 MUTE
17 LDON
18 RMS
36 BACKCHK
44 REM
46 CE
59 BACKV
83 BACKON
uPD784215GF506
E2PROM
CXD2652AR
MDM-04
LC8904Q
LC75710NE
SM5844AF
EXDT
10
EXLAT
11
EXCK
4
Q1
Q2 FLRST
Q3 ADRST
Q4 DIGRS
DRIVE Q5
DINSEL Q6
EMPHA Q7
DARST Q8
RAM
(X25)IC21
(X33)IC6
(X33)IC2
(X25)IC11
(X14)IC1
(X25)IC13
(X25)IC2
(X25)J3
(X25)IC15
MECHA
ELECTRIC Vol.
SERIAL.
DM-SE9 2,COVER( 98.4.24 22:32 y[W 6
No.
Name
I/O
Description
1,2
A16,17
O SRAM address
3
FLDCE
O FL display driver CE
4
EXCK
O Extension port clock
5
RD
O SRAM reading
6
WR
O SRAM writing
7
CS
O SRAM CS
(L:SRAM enable)
8
STB
O SRAMASTB
9
Vdd
-
Microcomputer power supply
10
EXDT
O Extension port data
11
EXLAT
O Extension port latch
12
XRST
I
System IC reset
13
SLC
O E2PROM clock
14
MNT2
I
System IC BUSY
15
SENS
I
System IC SENS
16
POWER
O POWER
(H:Power on)
17
LDON
O Laser ON
(H:Laser diode ON)
18
RMS
O Pickup microwave satisfactory
(H:ON)
19
RECSW
I
Mechanism REC position switch
(L:REC SW ON)
20
REFLECT
I
Disc high reflex / low reflex switch
(L:High reflex)
21
PHOTSW
-
Mechanism PLAY position detection
(L:Phot sensor ON)
22
(GND)TEST
-
Microcomputer power supply
23
PROTECT
I
Disc protect switch
24
STTLMT
I
Mechanism pickup position switch
(L:Start limit SW ON)
25
D1SCIN
I
Mechanism disc insertion switch (L:Disc out SW ON)
26
VLCK
O SRC clock
27
RECP
O System IC RECP
28
XLAT
O System IC latch
29
MNT3
I
System IC spindle LOCK
30
MNT0
I
System IC FOK
31
LOADOUT
O Loading motor OUT direction drive
(L:Loading IN)
32
LOADIN
O Loading motor IN direction drive
(L:Loading OUT)
33
SCHNG
O E2PROM data output change
(H:SDA output)
34
SDA
I/O E2PROM data
35
TX
O System IC TX
36
BACKCHK
O Back-up voltage check ON
37
Vdd
-
Microcomputer power supply
38
X2
O Oscillation element (12.5MHz)
39
X1
I
Oscillation element (12.5MHz)
40
VSS
-
Microcomputer power supply
41,42 XT2,1
O Clock oscillation element (Unused)
43
RESET
I
Microcomputer reset
44
REM
I
Remote control input
45
XlNT
I
ATRAC interrupt
46
CE
I
Microcomputer CE
47
SQSY
I
SYNC interrupt
48
DQSY
I
Inner DlN interrupt
49
SSQSY
I
External DlR interrupt
50
MNT1
I
System IC shock detection
51
Vdd
-
Microcomputer power
52
+5V
-
A/D standard voltage
No.
Name
I/O
Description
53
-
I
Unused
54~56 KR1~3
I
Key return 1~3
57
-
I
Unused
58
INISW
I
Destination change
59
BACKV
I
Backup voltage detection
60
-
I
Unused
61
GND
-
Microcomputer power
62
-
I
Unused
63
VLDT
O SRC data
64
+5V
-
D/A standard voltage
65
SRDT
I
System IC input data
66
SWDT
O System IC output data
67
SCLK
O System IC clock
68
CRXD
I
External unit receiving data
69
CTXD
O External unit transmission data
70
CENA
I
External unit correspondence permission
71
VOLLAT
O Electron volume latch
72
MUTE
O MUTE terminal
73
DRDT
I
DIR reading data
74
DWDT
O DIR, display driver data
75
DCLK
O DIR / display driver clock
76
DLAT
O DIR latch
77
DEMPH
I
DIR emphasis
78
SRCLAT
O SRC latch
79,80 DSUB2,1
I
DIRSUB2,1
81
SBUSY
O 16bit synchro BUSY
82
VLCK
O 16bit synchro DATA
83
BACKON
O Back-up voltage charge ON
84-91 AD0~7
O SRAM address / data
92-99 A8~15
O SRAM address / data
100
Vss
-
Microcomputer power
DM-SE7/SE7(G)/SE9
4
CIRCUIT DESCRIPTION
1-2 Pin description
DM-SE9 2,COVER( 98.4.24 22:32 y[W 7
1-3 Backup
Each following condition is backup to the memory with
ON/OFF of the AC power.
· Information of TOC
· UTOC information
(Settlement contents of "editing etc. of record, TRACK edit-
ing, titles")
· Condition of POWER ON/OFF
· Condition of REC INPUT
· Condition of AUTO/MANUAL
· Setting of DIGITAL REC LEVEL
· Contents of the presetting title
1-4 Initial state
POWER
=OFF
REC INPUT
=ANALOG
AUTO MANUAL =AUTO
PLAY MODE
=TRACK
REPEAT
=OFF
TIME DISPLAY
=SINGLE(+)
REC LEVEL
=-12dB
DRIVE
=ON
Preset title
=PRE1 : Pops
=PRE2 : Rock
=PRE3 : Classic
=PRE4 : Jazz
=PRE5 : Disco
=PRE6 : Best Hits
=PRE7 : Air Check
=PRE8 : No.
=PRE9 : Vol.
1-5 Way of resetting a microprocessor
When turning on while pressing EJECT key,
DM-SE7/SE9 initializes and starts a microprocessor.
1-6 Key matrix :
*DM-SE7/SE9 doesn't function.
Mode for the inspection : It utilizes for the existence or non-
existence of the FL display.
· Way of setting
Turn on the AC power while pressing STOP(
7)key.
· Way of canceling
Press STOP(
7)key.
· Contents
Press(
¢)key or(4) key.
Then, DM-SE9 becomes the following test mode.
Press PLAY(
3) key, to fix each test mode.
To cancel each test mode, Press PLAY(
3) key once again.
· DOT TEST
(It becomes "Niagara indication" when PLAY key is
pressed.)
· SEG TEST
(When PLAY key is pressed all FL are lighted.
Indication changes cyclically as follows when
¢ or 4
key are pressed.)
"All FL light up"
"FL turn off the lights"
"KATAKANA"
"All FL light up"
· KEY TEST
(For the mode for the production line, in the service, it does-
n't use.)
1-7 Extension IC
2. Adjustment
DM-SE7/SE7(G)/SE9
CIRCUIT DESCRIPTION
INI SW 58pin
Description
High
Overseas ; KATAKANA uncorrespondence.
CYBER TITLER uncorrespondence.
Low
Japan
; KATAKANA correspondence.
CYBER TITLER correspondence.
0.00
0.49
1.48
2.48
3.48
KEY OFF
-0.47V
-1.46V
-2.46V
-3.46V
-4.45V
4.47-5.0V
KR 0
-
-
-
-
-
-
KR 1
÷÷
8
8
*O.T.E
*ATT UP
*ATT
-
DOWN
KR 2
3
3
7
7
¡
¡
1
1
REC INPUT
KR 3
-
0
0
¢
¢
4
4
TIME
DISPLAY
PIN No.
IC
Port name
I/O
Explanation
4
Q1
-
O
DIN selector 1
5
Q2
FLDRST
O
FL driver reset
6
Q3
ADRST
O
A/D reset
7
Q4
DIGRST
O
DIN reset
14
Q5
DRIVE
O
Drive ON/OFF
13
Q6
DINSEL2
O
DIN selector 2
12
Q7
EMPHA
O
Play emphasis ONÅ^OFF
11
Q8
DARST
O
D/A reset
Refer to the adjustment ( the page ) of the service manual
(B51-5387-00) of 1050MD/DM-5090/9090.
But, the key to operate is different as follows.
DM-SE7/SE9
1050MD/DM-5090/9090
Description
PLAY
ENTER
Decision of MODE
STOP
FADE / DELEAT
Cancellation of MODE
PAUSE
SET
Go to the next step
DM-SE7/SE9
1050MD/DM-5090/9090
Description
A continuation replay /
STOP
FADE / DELEAT
continuation recording
are canceled.
The thread moves to the
FF
FF
periphery only while
pressing a key.
The thread moves to the
FB
FB
internal circumference
only while pressing a key.
The continuation
recording menu choice
Every time pressing a
-
REC INPUT
key, DM changes the
mode at the pit and the
groove "
-
REC MODE
Spindle servo mode
change (CLVS and A)
Every time pressing a
O.T.E
TITLE INPUT
key, DM changes the
contents of the display.
5
DM-SE9 2,COVER( 98.4.24 22:33 y[W 10