KENWOOD MDX-F1 Service Manual

Cover page of KENWOOD MDX-F1 Service Manual

Service Manual for KENWOOD MDX-F1, downloadable as a PDF file.

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70%
MD PERSONAL STEREO SYSTEM
MDX-F1
SERVICE MANUAL
© 1999-12/B51-5592-00 (K/K) 468
P
U
SH OPEN
0
FM 75
AM
GND
AC IN
ANTENNA
In compliance with Federal Regulations, following are
reproductions of labels on, or inside the product relating to
laser product safety.
* Refer to parts list on page 40 .
KENWOOD-Crop. certifies this equipment conforms to
DHHS Regulations No.21 CFR 1040. 10, Chapter 1, Sub-
chapter J.
DANGER : Laser radiation when open and interlock
defeated.
AVOID DIRECT EXPOSURE TO BEAM.
Front glass
(B10-3540-04)
Knob ass'y
(K29-7753-04) : S
(K29-7755-04) : R
Panel ass'y
(A60-1729-02) : S
(A60-1803-02) : R
Knob
(K29-7669-02)
Front glass
(B10-3541-03)
Knob
(K29-7669-02)
Knob
(K29-7718-03) : S
(K29-7750-03) : R
Cassette holder
(A53-2174-02) : S
(A53-2188-02) : R
Rod antenna
(T90-0828-05)
Plastic cabinet
(A02-2949-01) : S
(A02-2950-01) : R
Lock terminal board
(E70-0051-05)
Miniature phone jack
(E11-0399-05)
Panel
(A29-1078-04)
S : silver
R : red
Note: Please contact KENWOOD service in your side if
you want to get the AC power cord.
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70%
MD PERSONAL STEREO SYSTEM
MDX-F1
SERVICE MANUAL
© 1999-12/B51-5592-00 (K/K) 468
P
U
SH OPEN
0
FM 75
AM
GND
AC IN
ANTENNA
In compliance with Federal Regulations, following are
reproductions of labels on, or inside the product relating to
laser product safety.
* Refer to parts list on page 40 .
KENWOOD-Crop. certifies this equipment conforms to
DHHS Regulations No.21 CFR 1040. 10, Chapter 1, Sub-
chapter J.
DANGER : Laser radiation when open and interlock
defeated.
AVOID DIRECT EXPOSURE TO BEAM.
Front glass
(B10-3540-04)
Knob ass'y
(K29-7753-04) : S
(K29-7755-04) : R
Panel ass'y
(A60-1729-02) : S
(A60-1803-02) : R
Knob
(K29-7669-02)
Front glass
(B10-3541-03)
Knob
(K29-7669-02)
Knob
(K29-7718-03) : S
(K29-7750-03) : R
Cassette holder
(A53-2174-02) : S
(A53-2188-02) : R
Rod antenna
(T90-0828-05)
Plastic cabinet
(A02-2949-01) : S
(A02-2950-01) : R
Lock terminal board
(E70-0051-05)
Miniature phone jack
(E11-0399-05)
Panel
(A29-1078-04)
S : silver
R : red
Note: Please contact KENWOOD service in your side if
you want to get the AC power cord.
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Loop antenna (1)
(T90-0852-05)
Remote control unit (1)
(A70-1325-05): RC-MDX0101
Battery cover (A09-1151-08)
R6/SUM-3 batteries
for remote (2)
AC plug adaptor (1)
(E03-0115-05)
MDX-F1
2
CONTENTS / ACCESSORIES / CAUTIONS
CONTENTS / ACCESSORIES / CAUTIONS ............. 2
CONTROLS ................................................................3
DISASSEMBLY FOR REPAIR....................................4
CIRCUIT DESCRIPTION ............................................5
ADJUSTMENT ..........................................................16
PC BOARD .............................................................. 20
SCHEMATIC DIAGRAM .......................................... 26
EXPLODED VIEW ....................................................38
PARTS LIST..............................................................40
SPECIFICATIONS ......................................Back cover
Contents
Accessories
Cautions
Stored contents which are
cleared immediately when
power plug is unplugged
from power outlet
Stored contents which are
cleared in at least a day
after power plug is
unplugged from power
outlet
Clock display
MD recorder section
Amplifier section
"on/standby" status
(ON or STANDBY)
Input selection
Volume control value
Tone control levels
Tuner section
Receiving band
Frequency
Preset stations
Auto tuning setting
Cassette deck unit
Transport direction
DOLBY NR
Reverse mode
Timer setting contents
Memory backup function
Note related to transportation and movement
Before transporting or moving this unit, carry out the f
ollowing operations.
1 Remove the CD or MD from the unit.
2 Press the 6 key of the MD.
3 Wait for some time and verify that the display
becomes as shown in the figure.
4 Press the 6 key of the CD.
5 Wait for some time and verify that the display
becomes as shown in the figure.
6 Wait a few seconds and turn the unit OFF.
MD
NO
DISC
CD
NO
DISC
Operation to reset
The microcomputer may fall into malfunction (impossibility
to operate, erroneous display, etc.) when the power cord
is unplugged while unit is ON or due to an external factor.
In this case, execute the following procedure to reset the
microcomputer and return it to normal condition.
Unplug the power cord from the power outlet then,
while holding the REPEAT key depressed, plug the
power cord again.
÷ Please note that resetting the microcomputer clears
the contents stored in and it returns to condition
when it left the factory.
0
REPEAT
Action
Meaning
Displayed Message
÷ No disc is placed on the tray.
÷ An attempt is made to record digital
signal from a source while its digital copy
has been prohibited by SCMS.
÷ There is no recordable area on the disc.
÷ An attempt is made to record a 256th
track.
÷ An attemptis made to assign a titlewith
more characters than usable.
÷ The disc does not contain any record-
ings.
÷ The disc does not contain any tracks but
has a disc title.
÷ The TOC *1 data of the disc is being
read.
÷ The data related to editing or recording is
being writtenin the disc.
÷ The contents of UTOC *2 are abnormal.
÷ An attempt is made to perform editing
beyond the restrictions, for example to
erase a track which is too short.
÷ This is a message for confirming if edit-
ing can really be executed.
÷ The minidisc is write-protected.
÷ The minidisc is only for playback.
÷ This indicates some trouble.
÷ Load a disc.
÷ Recording is not possible.
÷ Use another recordable disc.
÷ Morethan 256 tracks cannot be recorded
per disc.
÷ Refer to "Total number of title characters".
÷ When playback is required, use a recorded
disc.
÷ The disc can be used for recording without
any problem.
÷ This is a normal operation.
÷ This is a normal operation.
÷ Perform "ALLERASE" operation. If this
is not possible, use another disc.
÷ Perform editing following the restrictions.
÷ Press the ENTER key to execute editing.
÷ Cancel the write protection.
÷ Insert a minidisc for recording.
÷ Return to normal condition is made by
switching the unit off and then on again.
NO DISC
CAN'T COPY
DISC FULL
TITLE FULL
BLANK DISC
NO TRACKS
READING
WRITING
DISC ERROR
CAN'T EDIT
?(blinking)
PROTECTED
PLAY ONLY
UNIT ERROR
MD recorder section (Displayed messages and actions to be taken against them)
*1All minidiscs contain a Table of Contents (TOC) in addition to sound signals. The TOC is similar to the table of contents
in a book and contains information, such as track numbers, track length, and character information, that cannot be
rewritten.
*2In addition to the TOC, minidiscs also contain a special User's Table of Contents (UTOC) that contains track number, track
length, and character information, that can be rewritten.
Memory Backup for the MD Recorder Section
The contents of the memory are not stored on the disc if the power cord is unplugged.
If the power cord is unplugged suddenly or there is a power failure, the information on recording and editing
(normally recorded when the minidisc is ejected) may be erased or destroyed before it is recorded on the
minidisc. Once the information has disappeared, it can not be recovered.
After recording or editing, always remove the minidisc to record the recording or editing information.
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MDX-F1
3
CONTROLS
Display
( The displays given in this manual are approximations only.
They may differ from what actually appears on the display.)
1 PGM (program) indication
2 Indication related to CD and MD
3 Timer-related indicators
4 A.P.S. (Auto Power Save) indicator
5 Character information display section (dot display)
Shows character information including the input selection,
volume level and disc/track title
6 Character information display section
Frequency indication, time indication, track No., program
No., etc.
7 Tuner-related indicators
8 TAPE EQ. indication
9 O.T.E. (ONE TOUCH EDIT) indication
Appears during one-touch recording.
0 Selector-related indicators
! TITLE SEARCH indication
@ MD EDIT indication
# LOUD (Loudness) indication
$ EX.BASS (extra bass) indication
· · · · · · · · · · ·
TITLE
SEARCH
MHz
kHz
O.T.E.
TAPE EQ.
STEREO
TUNED
AUTO
TOTAL
3ALL 3REPEAT 3RANDOM SLEEP
TRACK NO.
PM
AM
FM
88888888
MD EDIT
1 2
LOUD
EX BASS
A.P. S.
O.T.T. PROG.
REC
REC
PGM
5
!
6
@
#
$
7
2
4
1
0
3
3
9
8
Cassette holder
(POWER) key
"STANDBY/TIMER" indicator
Remote sensor
Display
( ) STOP key (CD/MD/TAPE/TUNING MODE)
key (CD/MD/TAPE/tuner tuning)
"SOUND" key
"MENU" key
"REPEAT" key
"TUNER FM/AM" key
"CD
" key
"MD
" key
"TAPE " key
PUSH OPEN button
"TAPE REC" key
"MD REC" key
"VOLUME/MULTI CONTROL" knob
Mini Disc insertion slot
EJECT ( ) key
"SET/Demo" key
About the one-touch operation function
This unit incorporates the one-touch operation function for the user's convenience.
With this function, pressing any key enclosed in
( ~ ) while the unit is in standby mode immediately start
playback (or reception).
PUSH OPEN button
Top panel
Main unit
Front panel
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MDX-F1
4
DISASSEMBLY FOR REPAIR
2
2
1
1
1
1
3
3
x3
x2
x1
3 x1
x1
x1
x1
x1
x3
2 x3
FIG.1
BOTTOM
FRONT PANEL BOTTOM
4
4
4
4
FIG.2
5
5
5
5
5
5
FIG.3
1 Remove 3 screws from bottom side(
1X3).
2 Remove 8 screws on rear panel(
2X8).
3 Remove 3 screws on rod ant(
3X3).
4 Lift rear side of top cover and remove it.
Insert the screw driver to contact of door ass'y and sub
panel if remove door ass'y.
How to Disassemble Front Panel and Rear
Panel
How to Remove Door Ass'y
5 Remove 4 screws(
4X4).
6 Lift and slide CD parts of top cover by using handle
7 Remove 6 long screws(
5X6), slide front panel front-
wards.
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MDX-F1
5
CIRCUIT DESCRIPTION
1. Initialization
1-1 Setting
Insert the AC power cord with pressing the REPEAT key.
1-2 Operation
Display shows "INITIALIZE" if the unit works in initializa-
tion mode. It shows "STANDBY" after the unit is end of
work.
The unit is shipment condition(MD disc comes out, RAM
is clear, Backup data is also.) if normal mechanisms are
initialization.
Display shows error message as follows if the every
mechanism has an initialization error and CD door switch
malfunction.
Error
CD
The first digit: C
MD
The third digit: M
CASSETTE
The 5th digit: X
CD DOOR SW
The 7th digit: S
2. TUNER Preset
3. TUNER SPECIFICATIONS
P.CH
BAND
FREQ
P.CH
BAND
FREQ
1
FM
83.50MHz
6
FM
90.00MHz
2
FM
76.00MHz
7
FM
76.00MHz
3
FM
89.10MHz
8
AM
1629kHz
4
FM
108.00MHz
9
AM
1602kHz
5
FM
91.50MHz
10
AM
999kHz
P.CH
BAND
FREQ
P.CH
BAND
FREQ
11
AM
630kHz
26
FM
76.00MHz
12
AM
1440kHz
27
FM
76.00MHz
13
FM
106.00MHz
28
FM
76.00MHz
14
AM
531kHz
29
FM
97.50MHz
15
FM
76.00MHz
30
FM
106.00MHz
16
FM
91.50MHz
31
FM
76.00MHz
17
FM
92.50MHz
32
FM
76.00MHz
18
FM
76.00MHz
33
FM
76.00MHz
19
AM
990kHz
34
FM
76.00MHz
20
FM
91.40MHz
35
FM
76.00MHz
21
AM
531kHz
36
FM
76.00MHz
22
FM
76.00MHz
37
FM
76.00MHz
23
FM
76.00MHz
38
FM
76.00MHz
24
FM
76.00MHz
39
FM
108.00MHz
25
FM
76.00MHz
40
AM
945kHz
BAND
RECEIVING
CHANNEL
IF
PLL
FREQ.
SPACE
FM
76.0MHz~87.5MHz
100kHz
-10.7MHz 25kHz
FM
87.5MHz~108MHz
50kHz
-10.7MHz 25kHz
AM
531kHz~1629kHz
9kHz
+450kHz
9kHz
ACTIVE
Port #
Port Name
I/O
Descriptions
HL
1
DSTP
O
CD disc motor servo control output port
OFF
ON
2
XLON
O
Bias control port
ON
OFF
3
LDC
O
LD control
OFF
ON
4
SCLK
O
CD sense data read clock
5
SENSE
I
CD sense input
1
0
6
CD CLK
O
Clock for CD DSP
7
XLAT
O
CD DSP latch output
8
BYTE
I
GND
9
CNVSS
I
GND
10
XCIN
I
Timer clock(32.768kHz)
11
XCOUT
O
Timer clock(32.768kHz)
12
RESET
I
Microprocessor reset signal input
NORMAL
RESET
13
XOUT
O
Main clock port
14
VSS
-
GND
15
XIN
I
Main clock port (10MHz)
16
VCC(B.U.)
-
Power supply port (+5V)
17
NMI
I
+5.0V
18
REMOCON
I
Remote control signal input port
19
NC
O
open
20
SCOR
I
Sub-code synchro signal port
21
XRST
O
CD DSP reset signal output port
NORMAL
RESET
22
PLL DO
I
PLL data input port
23
SA CE
O
PLL IC chip enable
24
SA CLK
O
PLL IC clock
25
SA DATA
O
PLL IC data output port
26
ST
I
Stereo sensor port for tuner
MONO
STEREO
27
SD
I
SD sensor port for tuner
UNTUNED
TUNED
28
SQCK
O
Sub-code clock for CD
29
SQSO
I
Sub-code input port for CD
30
NC
O
open
4. MAIN MICROPROCESSOR: M30622MC-746(X09,IC601)
4-1 Port descriptions

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