Denon DCM-380 User manual

SERVICE MANUAL
STEREO CD PLAYER
MODEL DCM-380/280
For U.S.A., Canada, Europe, U.K.
& Australia model
1Some illustrations using in this service manual are slightly different from the actual set.
16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN
Telephone: [phone]
X-0162 NC 0211

2
2
DCM-380/280
SAFETY PRECAUTIONS
The following check should be performed for the continued protection of the customer and service technician.
LEAKAGE CURRENT CHECK
Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to
chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either
side of the power cord is less than 460 kohms, the unit is defective.

3
3
DCM-380/280
BLOCK DIAGRAM

4
4
DCM-380/280
WIRING DIAGRAM
CD MECHANISM
CD PICKUP
C3P101 CP403 CP402
MAIN SECTION
CP501
CP502
TRANS
AC CORD
POWER SWITCH
CN706
SW701
CN802
CN801
CP705 CP704
CN101 CP401
FRONT SECTION
JK302
CN301

5
5
DCM-380/280
DISASSEMBLY
(To reassemble, reverse disassembly.)
1. TOP COVER
Remove 4 screws A fixing the Top
Cover and 5 screws A mounting the
Rear Panel, then detach the Top Cover
as shown in the arrow direction.
2. MAIN P.W.B.
Remove 1 screw A , 2 screws B ,1
screw C fixing the Main P.W.B. and 1
screw B mounting the rear Panel; then
detach the Main P.W.B. as shown in the
arrow direction.
3. FRONT PANEL
Remove 2 screws D mounting the
Front Panel; 2 side screws B and 5
below screws A mounting the Front
Panel, then detach the Front Panel as
shown in the arrow direction.
4

6
6
DCM-380/280
4. CONTROL P.W.B.
Remove 8 screws E mounting the
Front Panel and 1 E screw fixing the
Control P.W.B., then detach the Control
P.W.B. as shown in the arrow direction.
5. BACK PANEL
Remove 3 screws F mounting the Bot-
tom Cover, then detach the Back Panel
as shown in the arrow direction.
Note: Only in φ3x5mm, other screws
can’t be used.
6. LOADER ASS’Y
Remove 1 screw G and 4 screws H
mounting the Bottom Cover, then detach
the Loader Ass’y as shown in the arrow
direction.

7
7
DCM-380/280
SEMICONDUCTORS
CXD3068Q
D/A
Interface
Error
Corrector
32K
RAM Digital
OUT
Sub Code
Processor
Clock
Generator
Asymmetry
Corrector
Digital
PLL
Digital
CLV
CPU
Interface
Servo
Auto
Sequencer
Signal processor block
RFAC
ASYO
ASYE
BIAS
XPCK
FILO
FILI
PCO
CLTV
MDP
LOCK
SENS
DATA
XLAT
CLOK
SCOR
SBSO
EXCK
SCSY
SQSO
SQCK
XRST
TEST
TES1
PWMI
ASYI
FSTO
C4M
Servo block
SERVO
Interface
MIRR
DFCT
FOK
SERVO DSP
FOCUS SERVO
TRACKING
SERVO
SLED SERVO
PWM GENERATOR
FOCUS PWM
GENERATOR
TRACKING PWM
GENERATOR
SLED PWM
GENERATOR
RFDC
CE
TE
SE
FE
VC
IGEN
OPAmp
Analog SW
A/D
Converter
ADIO
FFDR
FRDR
TFDR
TRDR
SFDR
SRDR
SOUT
SOCK
XOLT
SCLK
COUT
SSTP
ATSK
MIRR
DFCT
FOK
XTAI
XTAO
XTSL
V16M
VPCO
VCTL
MUTE
BCK
PCMD
LRCK
C2PO
WDCK
DOUT
MD2
WFCK
EMPH
GFS
XUGF
EFM
demodurator
16
27
50
48
49
57
62
12
23
24
25
52
53
54
55
4
5
6
7
15
76
77
78
79
80
40
39
38
41
42
43
44
46 29
30
34
31
32
33
8
9
19
20
21
22
26
73
74
75
2
37
36
3
14
17 67
65 66
10
11 13 68
58
59 60
69
71 72
63
64

8
8
DCM-380/280
CXA2581N
DVCC
AC
SUM
APC
AC
VCA EQ
VC
VC
VC
RW/ROM
EQ_ON/OFF
VOFST DVC
DVCC
RW/ROM
VC
RW/ROM
RW/ROM
RW/ROM
VC
DVCC
25
15
30
29
28
17
16
26242334
6
7
8
9
10
19
18
DVC
DVCC
DVC
VC
VC
VOFST
DVC
DVC
VCC
VOFST
B
C
A
D
A
B
C
D
F
E
SW
PD
LD
VCC
GND
VC
DVC
DVCC
CE
CEI
TE
TE_BAL
FE
FEI
RFDCO
RFDCI
RFAC
VFC RFC RFG BST EQ_IN AC_SUM
DC_OFST
VC
RW/ROM
21
145
20
13
VC
VCC
APC-OFF (Hi-Z)
RW/ROM
(H/L)
2722
1
2
12
11
gm
gm
RW/ROM
VOFST

9
9
DCM-380/280
CXP82032/82040/82052/82060
8-BIT TIMER/COUNTER 0
8-BIT TIMER 1
UART BAUD RATE
GENERATOR
UART RECEIVER
UART TRANSMITTER
INT2
XTAL
PWM
RAM
3984
BYTES
SPC 700
CPU CORE
A/D CONVERTER
INT3/NMI
INT1
INT0
AN0 to AN7 8PA0 to PA7
FDP
CONTROLLER/
DRIVER
32kHz
TIMER/COUNTER
PRESCALER/
TIME-BASE TIMER
RST
VDD
VSS
PORT A PORT B
PORT C PORT D
PORT E PORT F
PORT G
8 8 6
2
8
8
8 8
PB0 to PB7
PC0 to PC7
PD0 to PD7
PE0 to PE5
PF0 to PF7
PG0 to PG7
PE6 to PE7
TEX
EXTAL
TX
CS0
2
ROM
32K/40K/ 52K/60K
BYTES
RAM
KEY SCAN
PORT H
PH0 to PH7
8
CLOCK GENERATOR/
SYSTEM CONTROL
14-BIT PWM GENERATOR
FIFOREMOCON
RMC
SI0
SO0
SCK0
SI1
SO1
SCK1
EC0
TO
CINT
EC1
ADJ
G0/A0 to G15/A15
A16 to A23
A24 to A56
VFDP
KR0 to KR7
16
8
32
8
2
SERIAL INTERFACE (CH1)
16-BIT CAPTURE
TIMER/COUNTER 2
SERIAL
INTERFACE
(CH0)
BUFFER
RAM
2 2
PORT I
PI0 to PI4
4
TxD
RxD
INTERRUPT CONTROLLER
RAM

10
10
DCM-380/280
Serial
Input
I/F
Output Amp and
Low-Pass Filter
DAC
8x
Oversampling
Digital Filter
with
Function
Controller
Enhanced
Multi-Level
Delta-Sigma
Modulator
Output Amp and
Low-Pass Filter
DAC
BCK
LRCK
DATA
ML
MC
MD
Function
Control
I/F
System Clock
Manager
Zero Detect Power Supply
V
OUT
L
V
COM
V
OUT
R
V
DD
DGND
ZEROL
ZEROR
SCK
System Clock
V
CC
AGND
PCM1748
BA033FP