70%
MULTIPLE COMPACT DISC PLAYER
CD-4900M/DPF-J9030
SERVICE MANUAL
© 2000-1/B51-5594-00 (K/K) 2738
DISC
SKIP
$
>
&
^
o PUSH OPEN
)
REPEAT
CONFIRM
DISPLAY
CONTINUROUS PLAY
RANDOM
OPERATION
TIMER PLAY
DISPLAY |B
OFF
ON
STANDBY
POWER
ON/STANDBY
DISPLAY |A
B
A
R
L
OUTPUT
SYSTEM
CONTROL
SL16
TEXT
TEXT
DIGITAL
OUT
OPTICAL
A
B
Knob(TIMER)
(K29-7717-08)
Front glass
(B10-3557-08)
Front glass
(B10-3558-08)
Front glass
(B10-3559-08)
Indicator
(B12-0326-04)
Dressing panel *
(A21-)
knob
(K29-7716-08)
Panel
(A60-1752-18)
Metallic cabinet
(A01-3738-08)
Phono jack
(E63-0120-05)
Miniature phone jack
(E11-0360-05)
Power cord bushing
(J42-0083-05)
Miniature phone jack
(E11-0293-05)
AC power cord *
(E30-)
* Refer to parts list on page 26.
In compliance with Federal Regulations, following are repro-
ductions of labels on, or inside the product relating to laser
product safety.
· Please refer to the service manual CD-223M/DPF-
J3010/CD-224M/DPF-J5010 (B51-5409-00) if need more
information.
· Refer to CD-2260M/2280M/DPF-J7010/J9010 service manu-
al (B51-5416-00), if you require sub microprocessor (IC3:
X25) in detail.
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
Audio
(E30-0505-05)
(E30-2816-05)
(E30-2861-05)
cord ....................... (2)
System control cord ........ (1)
Batteries (R6/AA) ............ (2)
Communication cord ....... (1)
REMOTE CONTROL UNIT RC-KB2
REMOTE
CONTROL
UNIT
RC-P0714
T
U
V
X
Y
Z
W
/
.
(
'
)
MODE
SET
SELECTOR
DISC
DELETE
/CLEAR
SPACE
CHARAC.
/CHECK
/P.MODE
RANDOM
SELECTON
DISPLAY
CONFIRM
A
B
C
D
E
F
G
REPEAT
BEST
POWER
3
2
4
H
J
K
L
M
N
O
P
Q
R
S
1
7
6
8
5
+10
0
+100
9
7
ENTER
6
4¢
1¡
DISC
SKIP
DOWN
UP
CURSOR
CHARACTER
DOWN
UP
LEFT
RIGHT
I
Remote control units ...... (2)
(A70-1326-05): RC-KB2
Battery cover (A09-1176-08)
(A70-1335-18): RC-P0713
Battery cover (A09-0374-08)
To reset the registered contents
The registered contents for title, music type, user file and best
selection can be reset by the following procedure.
Operation to reset
The microcomputer may malfunction (impossibility to operate,
erroneous display, etc.) when the connection cords are un-
plugged while power is ON or due to an external factor. In this
case, execute the following method to reset the microcomputer
and return it to normal condition.
Unplug the power cord from the power socket and plug the
power cord into the socket again.
Unplug the power cord from the power socket, and while
holding the
7 key depressed, plug the power cord into the
socket again.
CD-4900M/DPF-J9030
2
CONTENTS / ACCESSORIES / CAUTIONS
CONTENTS / ACCESSORIES / CAUTIONS ............. 2
CIRCUIT DESCRIPTION ............................................3
ADJUSTMENT ............................................................8
PC BOARD ................................................................ 9
SCHEMATIC DIAGRAM .......................................... 13
EXPLODED VIEW ....................................................24
PARTS LIST..............................................................26
SPECIFICATIONS ......................................Back cover
Contents
Accessories
Cautions
CD-4900M/DPF-J9030
3
CIRCUIT DESCRIPTION
X32,IC2
X32,IC8
CD MECHA
CXD2587Q
CLOCK
35 CLOK
S1 SW 7
S1 SW
CDM-31
(DSP)
XLAT
36 XLAT
S2 SW 4
S2 SW
DATA
44 DATA
S3 SW 3
S3 SW
SCLK
33 SCLK
D SENS1 23
DISC SW1
SENS
34 SENS
D SENS2 60
DISC SW2
SYSM
45 MUTG
+5V PUL 10
D PWM
SCOR
46 SCOR
R CW 24
ROTARY+
SQCO
73 SQSI
R CCW 25
ROTARY-
SQCK
75 SCK/SQCK
LOAD SW 28
LOAD SW1
UNLOAD SW 29
UNLOAD SW1
X32,IC14
67 SCK SW
LOAD M+26
LOADM+1
uPD780204
CLK
LOAD M-27
LOADM-1
(DOT DRIVER)
SO
72 SI
TIMER PLAY
SI
74 SO
LOADM+2 63
LOADM+2
ON/OFF
STB
71 STB1
LOADM-2 62
LOADM-2
7P
LOAD SW2 58
UNLOAD SW2
4P
5P
6P
UNLOAD SW2 59
DLE SW2
uPD784217GF502
ON/
LED A
LED B
STANDBY
X32,IC15
uPD780204
CLK
RESET 43
RESET INPUT
(DOT DRIVER)
SI
IC RESET 47
PERIPHERY IC RESET
STB
46 STB2
JOG
55 JOG 2
X32,IC10
56 JOG 1
14~21
D0~D7
LASER ON/OFF
70 LDC
(D7~D0)
uPD17215GT-737
ANALOG MUTE
48 SYSM
SPINDLE MOTOR ON/OFF
31 MON
RWRREQ 13
RWRREQ
RTREN 11
RTREN
8.16BIT 54 8,16
RWR 12
RWR
MODEL DISCRIMINATION 53 A/D0
X32,IC9
84~91
(D0~D7)
A1 SW
A2 SW
1,76~83,92~99
(A0~A16)
(SRAM)
P1
P2
RD 5
OE
uPD780024
RXD0
69 TXD1
WR 6
WE
(SUB uCOM)
TXD0
68 RXD1
CS 7
CS
ASTB 8
LE
TX OUT
65 TXD2
SDATA 49
SERIAL COMMUNICATION
RECEIVER
66 RXD2
SBUSY 50
1. Main microprocessor : uPD784217GF502 (X32, IC8)
1-1 Microprocessor periphery block diagram
CD-4900M/DPF-J9030
4
CIRCUIT DESCRIPTION
Pin No.
Pin Name
I/O
Description
1
A2
O
Address bus of SRAM.
2
NC
-
No connection.
3
S3-SW
I
Mechanism address detector switch.
4
S2-SW
I
Mechanism address detector switch.
5
RD
O
SRAM read strobe.
6
WR
O
SRAM write strobe
7
S1-SW
I
Mechanism address detector switch.
8
ASTB
O
No connection.
9
VDD
-
Power supply(+5V).
10
+5VPUL
O
Disc sensor ON/OFF. L:on
11
RTRN
I
TX permission data to remote control microprocessor.
12
RWR
I
Reading data of remote control microprocessor.
13
RWRR
O
TX request data to remote control microprocessor.
14~21
L-D7-D0
O
Data output to remote control microprocessor.
22
TEST
-
GND.
23
DISC-SW
I
Disc sensor.
24
ROTARY-CW
O
Mechanism rotary motor(+). H:CCW
25
ROTRAY-CCW
O
Mechanism rotary motor(-). H:CW
26
LOADM+1
O
Loading motor(+) for main pickup.
27
LOADM-1
O
Loading motor(-) for main pickup.
28
LOAD-SW1
I
Loading switch for main pickup.
29
UNLOAD-SW1
I
Unloading switch for main pickup.
30
CS
O
Chip selector
31
MON
O
Control port of poor focus works.
32
SCLK
O
Sens serial data read clock.
33
SENS
I
SENS signal input.
34
CLOCK
O
Serial data clock.
35
XLAT
O
CXD2587Q latch. H î L:latch
36
DATA
O
Serial data output.
37
VDD
-
Power supply(+5V).
38,39
X1,2
-
Main system clock(12.5MHz).
40
VSS
-
GND.
41
XT2
-
No connection.
42
XT1
I
GND.
43
RESET
I
System reset signal input.
44
SCOR
I
Sub code synchro detection.
45
MUTEG
O
Muting control output. H:muting on.
46
STB2
O
Strobe signal output to dot driver.
47
ICRESET
O
IC reset.
48
SYSM
O
Analog muting. L: Muting on.
49
SDATA
I/O
Serial data signal I/O.
50
SBUSY
I/O
Serial busy signal I/O.
51
AVDD
-
Power supply(+5V).
52
AVREF
-
A/D reference power supply.
53
A/D0
I
Model discrimination.
54
8/16
I
8/16 bit selector. H:16bit.
55
JOG2
I
Encoder signal A input.
1-2 Microprocessor pin description (X32, IC8): UPD784217GF502
CD-4900M/DPF-J9030
5
CIRCUIT DESCRIPTION
Pin No.
Pin Name
I/O
Description
56
JOG1
I
Encoder signal B input.
57
DOOR-SW
I
Door open/close detector switch.
58
LOAD-SW2
I
Load switch2 for sub pickup.
59
UNLOAD-SW2
I
Unload switch2 for sub pickup.
60
DISC-SW2
I
Disc2 sensor.
61
VSS
-
GND.
62
LOADM-2
O
Load motor(-) for sub pickup.
63
LOADM+2
O
Load motor(+) for sub pickup.
64
AVREF1
-
D/A reference power supply.
65
RXD2
I
UART communication input.
66
TXD2
O
UART communication output.
67
SQCK/SCK-SW
O
SQCK,SCK(DOT/DSP clock) selector. L:DSP.
68
RXD1
I
UART communication input from sub u-com.
69
TXD1
O
UART communication output to sub u-com.
70
LDC
O
Laser on/off. L: Laser diode on.
71
STB1
O
Strobe signal output to dot driver.
72
SI
I
Data input from dot driver.
73
SQS1
I
Sub code read data input.
74
SO
O
Data output to dot driver.
75
SCK/SQCK
O
Dot driver/sub code read clock.
76-83
A16,14,12,7-3
O
Address output to SRAM.
84~91
D0-7
I/O
SRAM data bus.
92~99
A10,A15,A13,A8,
O
Address output to SRAM.
A9,A11,A0,A1
100
VSS
-
GND.
VOLTAGE
A/D0(33)
A/D1(32)
A/D2(31)
4.1V
-
-
OPERATION
3.3V
-
-
RANDOM
2.5V
-
-
CONFIRM
1.6V
-
REPEAT
CONT.P
0.8V
DOWN
DISP.
PLAY/PAUSE
0V
UP
POWER
STOP
1-3 Key matrix ( ) : IC14 Pin No.