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For U.S.A., Canada
& Europe model
Ver. 3
SERVICE MANUAL Please refer to the
DCM-390
MODIFICATION NOTICE.
MODEL
MODEL DCM-290
MODEL DCM-27
MODEL DCM-500AE
STEREO CD PLAYER
For purposes of improvement, specifications and
design are subject to change without notice.
Please use this service manual with referring to the
operating instructions without fail.
Some illustrations using in this service manual are
slightly different from the actual set.
TOKYO, JAPAN
Denon Brand Company, D&M Holdings Inc.
X0283 V.03 DE/CDM 0706
DCM-390/290/27/500AE
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.
LASER RADIATION
Do not stare into beam or view directly with optical instruments, class 3A laser product.
CAUTION Please heed the points listed below during servicing and inspection.
Heed the cautions! Inspect for safety after servicing!
Spots requiring particular attention when servicing, such as Check that all screws, parts and wires removed or discon-
the cabinet, parts, chassis, etc., have cautions indicated on nected for servicing have been put back in their original posi-
labels or seals. Be sure to heed these cautions and the cau- tions, inspect that no parts around the area that has been
tions indicated in the handling instructions. serviced have been negatively affected, conduct an insulation
check on the external metal connectors and between the
Caution concerning electric shock! blades of the power plug, and otherwise check that safety is
ensured.
(1) An AC voltage is impressed on this set, so touching inter-
nal metal parts when the set is energized could cause
(Insulation check procedure)
electric shock. Take care to avoid electric shock, by for ex-
Unplug the power cord from the power outlet, disconnect the
ample using an isolating transformer and gloves when
antenna, plugs, etc., and turn the power switch on. Using a
servicing while the set is energized, unplugging the power
500V insulation resistance tester, check that the insulation re-
cord when replacing parts, etc.
sistance between the terminals of the power plug and the ex-
(2)There are high voltage parts inside. Handle with extra care ternally exposed metal parts (antenna terminal, headphones
when the set is energized. terminal, microphone terminal, input terminal, etc.) is 1M or
greater. If it is less, the set must be inspected and repaired.
Caution concerning disassembly and assembly!
Though great care is taken when manufacturing parts from
sheet metal, there may in some rare cases be burrs on the
edges of parts which could cause injury if fingers are moved CAUTION Concerning important safety parts
across them. Use gloves to protect your hands.
Many of the electric and structural parts used in the set have
Only use designated parts! special safety properties. In most cases these properties are
difficult to distinguish by sight, and using replacement parts
The set's parts have specific safety properties (fire resis- with higher ratings (rated power and withstand voltage) does
tance, voltage resistance, etc.). For replacement parts, be not necessarily guarantee that safety performance will be pre-
sure to use parts which have the same properties. In particu- served. Parts with safety properties are indicated as shown
lar, for the important safety parts that are marked ! on wiring below on the wiring diagrams and parts lists is this service
diagrams and parts lists, be sure to use the designated parts. manual. Be sure to replace them with parts with the designat-
ed part number.
Be sure to mount parts and arrange the
wires as they were originally! (1) Schematic diagrams ... Indicated by the ! mark.
For safety reasons, some parts use tape, tubes or other insu- (2) Parts lists ... Indicated by the ! mark.
lating materials, and some parts are mounted away from the
Using parts other than the designated parts
surface of printed circuit boards. Care is also taken with the
could result in electric shock, fires or other
positions of the wires inside and clamps are used to keep
dangerous situations.
wires away from heating and high voltage parts, so be sure to
set everything back as it was originally.
2
MAIN PCB CONTROL PCB
REMOTE I/O PIC-7043TM2
CXA1511M
REMOCON
RECEIVER
IR SENSOR
RS232 (DCM390)
SP232A
BLOCK DIAGRAM
5CD LOADER RS232 I/F KEYS
LOADING TURNTABLE
+ +
M M LA6531
- - DRIVER
T
SWITCHES
UPD1631
VFD DRIVER VFD
MECHA ASS'Y
DISC SLED
+ + 15218
M M BA6392FP AMP & LPF
AUDIO OUT
3
DRIVER PCM1716
- -
PCM1732
CD PICK UP CPU PCB DAC
PHONES PCB
FOCUS
4556 PHONES OUT
AMP 3 L
TRACKING
MCF5249 2 R
CXD3059 1 G
CPU
CD DSP
PU SWITCH ISOLATING TX.
DIGITAL OUT
4641632 29LV160
RAM ROM
POWER TX. 74HC00
TOTX179
1A 74HC00
1 2 POWER C1
SUPPLY 2
POWER SWITCH SWITCH BUFFER
AC INLET 2P OPTICAL D.OUT
DCM-390/290/27/500AE
DCM-390/290/27/500AE
DISASSEMBLY
(To reassemble, reverse disassembly)
1. TOP COVER
Remove 4 screws A fixing the Top
Cover and 5 screws A mounting the A
Rear Panel, then detach the Top Cover
as shown in the arrow direction.
A
A
2. BACK PANEL
Remove 3 screws B mounting the
Bottom Cover and 5 screws C mounting
C
the Back Panel, then detach the Back
Panel as shown in the arrow direction.
Note: Only in 3x5mm, other screws
C
can't be used for B .
Note: Do not yet exclude FFC ( mark)
DCM390BKE3
ONLY
B
4
DCM-390/290/27/500AE
3. FRONT PANEL
Remove 2 side screws D and 5 below
screws B mounting the Front Panel, t
hen detach the Front Panel as shown
in the arrow direction.
Note: Do not yet exclude FFC ( mark)
D
B D
4. CONTROL P.W.B. & Phone P.W.B.
Remove 8 screws E mounting the
Front Panel and 1 E screw fixing the E
Control P.W.B., then detach the Control F
P.W.B. as shown in the arrow direction.
E
Remove 2 screws F mounting the
Front Panel fixing the Phone P.W.B.,
then detach the Phone P.W.B.. E
5. LOADER ASS'Y & MAIN P.W.B.
Remove 1 screw G and 4 screws H
H G
mounting the Bottom Cover, then detach
the Loader Ass'y & Main P.W.B. as shown
in the arrow direction. H H
Note: Do not yet exclude FFC ( mark)
H
5
DCM-390/290/27/500AE
6. LASER SHORT
Reverse a Loader ass'y & Main P.W.B. unit
and a Laser short-circuit in Pick-up next.
LESER
SHORT
I
7. MAIN P.W.B.
Remove 2 screws I , 4 screws J , 1 J I
J K
screw K fixing the Main P.W.B. then
detsch the Main P.W.B. as shown in
the arrow direction.
6
DCM-390/290/27/500AE
SEMICONDUCTORS
Only major semiconductors are shown, general semiconductors etc. are omitted to list.
IC's
CXD3059 (IC 101)
7
DCM-390/290/27/500AE
Block Diagram
8
DCM-390/290/27/500AE
Pin Description
9
DCM-390/290/27/500AE
10
DCM-390/290/27/500AE
11
DCM-390/290/27/500AE
12
DCM-390/290/27/500AE
K4S641632E (IC 202)
13
DCM-390/290/27/500AE
K4S641632E Block Diagram
UPD1631 (IC 401)
14
DCM-390/290/27/500AE
UPD16311 Block Diagram
UPD16311 Pin Description
15
DCM-390/290/27/500AE
SCF5249 (IC 201)
CD ROM
Block 8K ColdFire V2 Serial Audio
Decoder B Interface
byte u
Encoder I Addr Gen 3 x I2S Rx
I-Cache s 2 x I2S Tx
I Fetch
CD Text C
Interface o
Instr Buf n
96K SPDIF/EBU
Byte t Transmitter
SRAM Dec&Sel Op r
QSPI o
A Gen & Ex l
12-bit ADC
SPDIF/EBU
SDRAM Receiver
DUART EMAC
IDE Cntr
Interface Debug & Chip
Timers
Module Selects
PLL
Flash General Frequency
M-bus
Media DMA
(I2C)
Purpose Synthesizer
Interface I/O
M29W800DB (IC 203)
Pin Description
16
DCM-390/290/27/500AE
BA6392FP (IC 102)
Pin Description
17
DCM-390/290/27/500AE
SP233ACP (IC 104)
Block Diagram
LA6531 (IC 106)
Pin Description
CXA1511L/M (IC 105)
Head Limiter BPF Detector & Hysteresis
Amp Amp BEF Comparator Integrator Comparator
IN 1
ABLC
Photo
Diode
2 3 4 5 6 7 8
C1 C2 GND fo N.C. OUT VCC
470, 680
0.01