Circuit Description - Kenwood MDX-01 Service Manual

Md personal stereo system
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MDX-01/02
QQ
3 7 63 1515 0
1. INITIALIZATION
1-1 How to Set Initialization
Insert the power cord to AC outlet with pressing REPEAT
key.
1-2 Operation in Initialization mode
Display shows INITIALIZE, and Standby mode after
mechanism check.
The Display shows error code if mechanism has malfunc-
tion.
CD
MD
CD Door SW
The until changes to shipment mode after RAM and back-
up clear, disc out, and so.
2. TUNER PRESET
P.CH BAND
FREQ.
1
FM
98.30 MHz
2
FM
87.50 MHz
3
FM
89.10 MHz
4
FM
108.00 MHz
5
FM
90.00 MHz
6
FM
87.50 MHz
7
FM
87.50 MHz
8
FM
87.50 MHz
9
AM
1602 kHz
TE
L 13942296513
10
AM
999 kHz
11
AM
630 kHz
12
AM
1440 kHz
13
FM
106.00 MHz
14
AM
531 kHz
15
FM
87.50 MHz
16
FM
98.00 MHz
17
FM
98.50 MHz
18
FM
87.50 MHz
19
AM
990 kHz
20
FM
97.70 MHz
3. TEST MODE
3-1 TEST Mode Setting
TEST MODE
CD
MD 1
✽ FTC & Sub-Clock
Oscillation Check
Mode
MD mode2
FTC&Sub-Clock Oscillation Check Mode
FTC test mode is after Sub-Clock Oscillation Check
Mode(Internal Oscillation, Check of Period) Check Mode
is 5 times maximum. FTC carries if 1 tlme OK.
The unit is STOP mode after display shows error if 5
www
times NG.
No Oscillation îERR 1
(FTC mode is factory use only)
3-2 Test Mode Cancel
The unit cancel the test mode after initialization if pull out
power cord.
The unit cancel the test mode after no initialization if
4
power off.

CIRCUIT DESCRIPTION

Error Code
In 1st figure "C"
In 3rd figure "M"
In 7th figure "S"
P.CH BAND
FREQ.
21
AM
531 kHz
22
FM
87.50 MHz
23
FM
87.50 MHz
24
FM
87.50 MHz
25
FM
87.50 MHz
26
FM
87.50 MHz
27
FM
87.50 MHz
28
FM
87.50 MHz
29
FM
87.50 MHz
30
FM
106.00 MHz
31
FM
87.50 MHz
32
FM
87.50 MHz
33
FM
87.50 MHz
34
FM
87.50 MHz
35
FM
87.50 MHz
36
FM
87.50 MHz
37
FM
87.50 MHz
38
FM
87.50 MHz
39
FM
87.50 MHz
40
AM
945 kHz
SETTING
MD REC
SKIP UP
Insert the power cord
to outlet with pressing
BEST HITS
every left key
SKIP DOWN
x
ao
y
Period NGîERR 2
.
i
8
3-3 Key Function in Test Mode
KEY
T-SERVO ON(05) u w
CD PLAY
T-SERVO OFF(03)
Stop to CD operation(01)
STOP
TB/FB (07)
TG/FG (08)
FE/RF (09)
TE/VC (10)
HI SPEED(double speed) u w NOR
MENU
SPEED: in playback
Playback in STOP mode.
Track up of CD.
SKIP UP
FF search of CD if key pressed
more 400ms.
Pickup move outwards in STOP
mode if key pressed more 400ms.
Playback in STOP mode.
SKIP DOWN
Track down of CD.
FB search of CD if key pressed
more 400ms.
Pickup moves inwards in STOP
mode if key pressed more 400ms.
4. MD TEST MODE FOR ADJUSTMENT
4-1 Entering the Test Mode (MD Mode2)
While pressing the SKIP DOWN key, turn the AC on.
Q Q
3
6 7
1 3
4-2 Cancelling the Test Mode
Turn the AC off.
4-3 Key Operations for Adjustment
KEYS
SKIP UP/DOWN
MD PLAY/PAUSE
STOP
SKIP UP ✽
SKIP DOWN ✽
✽ Remote control only.
4-4 Selection of Adjustment Test Mode
Whenever the [volume/multi-control] knob is turned, the
adjustment test mode is selected.
No.
LCD
1
TEMP ADJU
2
LDPWR ADJU
3
LDPWR CHEC Laser power check.
4
EFBAL ADJU
5
TE B. ADJ
6
FBIAS ADJU
7
CPLAY MODE Continuous playback mode.
8
CREC MODE
✽9
STT-LIMIT
✽10
JUMP MODE
✽11
SRV DAT RE
✽12
EEP MODE
✽13
EEP INITIAL
For more information on each adjustment mode, refer to
u163
each section of 5, "Electrical adjustment".
If other adjustment mode has been entered incorrectly,
.
press the STOP key to exit the mode.
The number 9 - 13 are not used for service. If these
mode have been entered incorrectly, press the STOP
key immediately to exit the mode. Specially, do not use
EEP INITIAL. (E2PROM data has initialized if used it.)
2 9
9 4
2 8
CD MODE
MD MODE 1
Stop to operation.
Change to mute-off.
In STOP mode.
Selfcheck result shows
2 figures
Choose the REC input;
digital or analog in stop
mode.
Track up of MD.
FF search of MD if key
pressed more 400ms.
Track down of MD.
FB search of MD if key
pressed more 400ms.
1 5
0 5
8
2 9
9 4
OPERATION
Select mode or adjustment value change.
Fix mode or adjustment value.
Cancel the selected mode.
Pickup moves outwards when pressed skip up key.
Pickup moves inwards when pressed skip down key.
DESCRIPTION
The work of adjustment is unnecessary
in this mode.
Laser power adjustment.
Traverse adjustment.
Automatic EF balance adjustment.
Focus bias adjustment.
Continuous recording mode.
Check the mechanism start limit
switch position.
Track jump checking mode.
Servo data reading.
E2PPROM data reading or rewrite.
m
E2PPROM data initializing.
co
9 9
2 8
9 9
SECTION
5-5
5-6
5-6
5-7
-
5-8
4-5
4-6
-
-
-
-
-

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