Kenwood CD-203 Service manual
MULTIPLE CD PLAYER
CHECK
CLEAR
TIME DISP.
REPEATRANDOM
P.MODE
DISC SKIP
EDIT
4 ¢
1 ¡
DISC 1 DISC 2 DISC 3 DISC 4 DISC 5
0
6
7
PHONES
-ON –STANDBY
L
R
SL16 XS 8
ƒ
SYSTEM
CONTROL
LINE OUTPUT
CD-203/DPF-R3010/DPF-R3010E
CD-204/DPF-R4010/DPF-R4010E
SERVICE MANUAL
© 1998-3/B51-5417-00 (K/K) 3430
KENWOOD badge
(B43-0302-04)
Knob *
(K27-)
AC power cord *
(E30-)
Panel*
(A60-)
Miniature phone jack
(E11-0293-05)
Front glass
(B10-2441-03)
Panel (TRAY) *
(A29-)
Knob *
(K29-)
Phone jack
(E11-0272-05)
Power cord bushing
(J42-0083-05)
In compliance with Federal Regulations, following are reproductions 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.
Phono jack
(E63-0122-05)
AVOID DIRECT EXPOSURE TO BEAM
Slide switch
(S31-2132-05)
Illust is CD-204/DPF-R4010/DPF-R4010E.
* Refer to parts list on page 16.
Refer to 103CD/104CD/1050CD, DP-R797/R3090/R4090
(B51-5269-00) if you require circuit description and block
diagram in detail.
CD-203/204/DPF-R3010/R3010E/R4010/R4010E
HOW TO READ THE PARTS LIST
ABBREVIATION OF MODEL AND MASS PRODUCTION'S DESTINATIONS
MODEL ABB. Australia Canada China England Europe Germany Korea Malaysia
CD-203 - - P3 - - - - - DPF-R3010 - X3 - - T3 E3 - - DPF-R3010E - - - - - E4 - - CD-204 - - P1 - - - - - DPF-R4010 - X1 - - T1 E1 - - DPF-R4010E - - - - - E2 - - -
MODEL
Mexico PX/AAFES Russia Scandinavia Shanghai USA Other area
CD-203 - - - - - - K3 - DPF-R3010 - - Y3 - - - - M3 DPF-R3010E - - - - - - - - CD-204 - - - - - - K1 - DPF-R4010 - - Y1 - - - - M1 DPF-R4010E - - - - - - - - -
CONTENTS / ACCESSORIES
Contents
CONTENTS / ACCESSORIES .................................. 2
CIRCUIT DESCRIPTION........................................... 3
ADJUSTMENT........................................................... 5
PC BOARD ................................................................ 6
Accessories
SCHEMATIC DIAGRAM............................................ 9
EXPLODED VIEW ................................................... 14
PARTS LIST............................................................. 16
SPECIFICATIONS ..................................... Back cover
Audio cord (1)
(E30-0505-05)
Remote control unit (1)
(A70-1128-05) : RC-P0504
CD-204/DPF-R4010/DPF-R4010E only
Battery cover: (A09-0356-08)
System control cord (1)
(E30-2816-05)
Batteries (R6/AA) (2)
CD-204/DPF-R4010/DPF-R4010E only
AC plug adapter (1)
(E03-0115-05)
DPF-R3010/R4010 : M type only
ABB.
2
CD-203/204/DPF-R3010/R3010E/R4010/R4010E
CIRCUIT DESCRIPTION
1. Pin description
Pin No. Name I/O Function
1~7 7G~1G O Display digit control (Grid7~Grid1)
8 VDD Power supply (+5V)
9 SQCK O Q data reading clock output
10 NC O Unused
11 SUBQ I Q data input
12~15 KR3~KR0 I Key return 3~0
16 NC I Unused
17 RESET I Reset input L : RESET
18 SLT SW I CDM25 start limit switch input L : SW ON
19 DOWN SW I CDM25 mechanism down switch input L : SW ON
20 AVSS I Unused (connected to VSS)
21 UP SW I CDM25 mechanism up switch input L : SW ON
22 CLOSE SW I CDM25 close switch input L : SW ON
23 OPEN SW I CDM25 open switch input L : SW ON
24 OPEN M O Open motor control H : ACTIVE
25 CLOSE M O Close motor control H : ACTIVE
26 RTRAY R O Rotary tray motor control (CW) H : ACTIVE
27 RTRAY L O Rotary tray motor control (CCW) H : ACTIVE
28 RTRAY S O Rotary tray motor control (deceleration) H : ACTIVE
29 AVDD Unused (connected to VDD)
30 AVREF Unused (connected to VSS)
31 NC I Unused
32 XT2 Unused (OPEN)
33 VSS GND
34 X1 I System clock input
35 X2 Unused
36 DSENSE I CDM25 disc sensor detection
37 PSENSE I CDM25 position sensor detection
38 LDC O Laser signal output L : LASER ON
39 FOK I FOK signal input H : FOCUS ON
40 D.R.I.V.E I Unused
41 SERIAL SW I Serial communication 8 (XS8)/16(SL16) bit changover H : 16 BIT
42 SDATA I/O System serial data signal input output
43 BUSY I/O System serial busy signal input output
44 SCOR I Sub code frame sync detection
45 MON O Focus drug countermeasure circuit control
46 MUTG O Digital mute control H : MUTE ON
47 REM I Remote control signal input
48 VPP GND
49 SENSE I Sense input from CXD2507AQ
50 DTA O Data output for CXD2507AQ
51 CLK O Clock output for CXD2507AQ
52 VDD Power supply (+5V)
53,54
55 LAT O Latch output for CXD2507AQ
56 GFS I Frame signal input
57 RMUTE O Analog mute control L : MUTE ON
58 MDT O Attenuater data output
59 MCK O Attenuater clock output
60 MEL O Attenuater latch output
61~70 Sp~Sg/KS O Display segment control (Seg p-Seg g) / Key scan
71 VLOAD Display drive negative power supply (-35V)
72~77 Sf~Sa/KS O Display segment control (Seg f-Seg a) / Key scan
78~80 10G-8G O Display digit control (Grid10-Grid8)
DEFECT SEL./NC
I Unused
3
CD-203/204/DPF-R3010/R3010E/R4010/R4010E
CIRCUIT DESCRIPTION
2. Test mode
2-1. Setting the test mode
¶ The microprocessor built in the unit can be put to TEST
MODE by just pressing the TIME DISP. key when set to
power on.
¶ DP-R series is available to set to each test mode by each
key.
2-2. Key vs Function in test mode
Step Key name Display Description
(1) Focus servo ..........................................................................ON
03
PLAY/PAUSE
1
2 UP Display goes on
3 DOWN Display goes off
4 DISC1 Search the position of No. 1
5 STOP 00
6 DISC2 - Canceled Test mode Normal mode
7 DISC3 01 Canceled Test mode, then 01 PLAY Normal mode
(Cyclic)
05
(3) Feed servo............................................................................OFF
(1) Focus servo ..........................................................................ON
(2) Tracking servo ......................................................................ON
(3) Feed servo............................................................................ON
(1) Focus servo ..........................................................................OFF
(3) Feed servo............................................................................OFF
TE-B adjustment(2) Tracking servo ......................................................................OFF
F-GAIN/T-GAIN
FE-B adjustment
Waiting key input(2) Tracking servo ......................................................................OFF
4
CD-203/204/DPF-R3010/R3010E/R4010/R4010E
VC
+
_
L.P.F.
+
+
L.P.F.
VTVM
VTVM
1
2
3
4
5
6
7
ADJUSTMENT
No. ITEM
Open the tray (Normal mode), then turn the power off.
1 LASER POWER
1. Press the STOP key.
2. Press the OPEN key.
3. Load a disc, then press the CLOSE key.
4. Press the PLAY key.
5. Press the OPEN key to open the tray.
6. Turn the power off. (Player stops as the tray is opened while the disc clamped.)
7. While pressing the TIME DISP. key, turn the power ON to enter the Test mode.
TRACKING ERROR
2
3
BALANCE
FOCUS ERROR
BALANCE
INPUT
SETTINGS
−
Test disc
Type 4
Test disc
Type 4
OUTPUT
SETTINGS
Apply the sensor section
of optical power meter
on the pickup lens.
Connect an oscilloscope
as follows.
CH1 : RF (CN2 pin 1)
CH2 : TE1 (CN2 pin 6)
Connect an oscilloscope
as follows.
CH1 : RF (CN2 pin 1)
CH2 : TE1 (CN2 pin 6)
PLAYER
SETTINGS
While pressing the
TIME DISP. key, turn
the AC ON. (Test
mode) Press the
PLAY/PAUSE key,
then confirm that the
display is "03".
Press the
PLAY/PAUSE key,
then confirm that the
display is "03".
Press the
/PAUSE
PLAY
then confirm that the
display is "05".
key,
ALIGNMENT
POINTS
−
TE BALANCE
VR2
FE BALANCE
VR1
ALIGN
FOR
On the power from
0.08 to 0.15 mW,
when the diffraction
grating is correctly
aligned with the RF
level of 1.0 Vp-p or
more.
Symmetry between
upper and lower pat-
terns
Optimum eye pattern
FIG.
(a)
Test disc
Type 4
Apply signal of
1.2 kHz,
50mVrms to
CN2 pin 5-6.
Note:
Type 4 disc : SONY YEDS-18 Test Disc or equivalent.
LPF: Around 47 kΩ+ 390 pF or so.
Step 1~4 are in Test Mode.
Connect a LPF to CN2
pin 5-6 to which you
connect an oscilloscope
(a) Laser power
0.08~0.15 mW
Pickup
Optical power meter
or AC voltmeters.
Press the
PLAY/PAUSE key,
then confirm that the
display is "05".
(e) Tracking gain
1.2 kHz
50 mVrms
TRACKING
GAIN
VR3
CN2
Two VTVMs should
read the same value.
(e)4 TRACKING GAIN
5
PC BOARD (Component side view)
1
2
3
EA B DC
4
5
6
7
6
Refer to the schematic diagram for the value of resistors and capacitors.
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