Denon RCD-M38 User manual
D&M Holdings Inc.
SERVICE MANUAL
e
e
Copyright 2010 D&M Holdings Inc. All rights reserved.
WARNING: Violators will be prosecuted to the maximum extent possible.
MODEL JP E3 E2 EK EA E1 E1K E1C
RCD-M38
33
RCD-M38DAB
3
D-M38S
3
STEREO CD RECEIVER
Ver. 3
•Some illustrations using in this service manual are slightly different from the actual set.
•Please use this service manual with referring to the operating instructions without fail.
•For purposes of improvement, specifications and design are subject to change without notice.
S0105-1V03DM/DG1007
Please refer to the
MODIFICATION NOTICE.
2
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.
Be sure to test for leakage current with the AC plug in both polarities, in addition, in each power ON, OFF and STANDBY
mode, if applicable.
CAUTION Please heed the points listed below during servicing and inspection.
◎Heed the cautions!
Spots requiring particular attention when servicing, such
as the cabinet, parts, chassis,etc., have cautions indicated
on labels. be sure to heed these causions and the
cautions indicated in the handling instructions.
◎Caution concerning electric shock!
(1) An AC voltage is impressed on this set, so touching
internal metal parts when the set is energized could
cause electric shock. Take care to avoid electric
shock, by for example using an isolating transformer
and gloves when servicing while the set is energized,
unplugging the power cord when replacing parts, etc.
(2) Tere are high voltage parts inside. Handle with extra
care when the set is energized.
◎Caution concerning disassembly and
assembly!
Through 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 ngers
are moved across them. Use gloves to protect your hands.
◎Only use designated parts!
The set's parts have specific safety properties (fire
resistance, voltage resistance, etc.). For replacement
parts, be sure to use parts which have the same
poroperties. In particular, for the important safety parts
that are marked z on wiring diagrams and parts lists, be
sure to use the designated parts.
◎Be sure to mount parts and arrange the wires
as they were originally!
For safety seasons, some parts use tape, tubes or other
insulating materials, and some parts are mounted away
from the surface of printed circuit boards. Care is also
taken with the positions of the wores omsode amd clamps
are used to keep wires away from heating and high
voltage parts, so be sure to set everything back as it was
originally.
◎Inspect for safety after servicing!
Check that all screws, parts and wires removed or
disconnected for servicing have been put back in their
original positions, inspect that no parts around the area
that has been serviced have been negatively affected,
conduct an inslation check on the external metal
connectors and between the blades of the power plug,
and otherwise check that safety is ensured.
(Insulation check procedure)
Unplug the power cord from the power outlet, disconnect
the antenna, plugs, etc., and turn the power switch on.
Using a 500V insulation resistance tester, check that the
inplug and the externally exposed metal parts (antenna
terminal, headphones terminal, input terminal, etc.) is
1MΩ or greater. If it is less, the set must be inspected and
repaired.
Many of the electric and structural parts used in the set
have special safety properties. In most cases these
properties are difficult to distinguish by sight, and using
replacement parts with higher ratings (rated power and
withstand voltage) does not necessarily guarantee that
safety performance will be poreserved. Parts with safety
properties are indicated as shown below on the wiring
diagrams and parts lists is this service manual. Be sure to
replace them with parts with the designated part number.
(1) Schematic diagrams ......Indicated by the z mark.
(2) Parts lists ......Indicated by the zmark.
Using parts other than the designated
parts could result in electric shock, res
or other dangerous situations.
CAUTION Concerning important safety
parts
3
NOTE FOR SCHEMATIC DIAGRAM
WARNING:
Parts marked with this symbol zhave critical characteristics. Use ONLY replacement parts recommended by the manufacturer.
CAUTION:
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.
WARNING:
DO NOT return the unit to the customer until the problem is located and corrected.
NOTICE:
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM / M=1,000,000 OHM
ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD EACH VOLTAGE AND CURRENT ARE MEASURED AT NO SIGNAL
INPUT CONDITION. CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR NOTICE.
NOTE FOR PARTS LIST
Parts for which "nsp" is indicated on this table cannot be supplied.
When ordering of part, clearly indicate "1" and "I" (i) to avoid mis-supplying.
Ordering part without stating its part number can not be supplied.
Not including General-purpose Carbon Chip Resistor in the P.W.Board parts list. (Refer to the Schematic Diagram for those parts.)
Parts marked with this symbol zhave critical characteristics. Use ONLY replacement parts recommended by the manufacturer.
Not including General-purpose Carbon Film Resistor in the P.W.Board parts list. (Refer to the Schematic Diagram for those parts.)
Part indicated with the mark "★" is not illustrated in the exploded view.
WARNING:
1.
2.
3.
4.
5.
6.
●Resistors
RD : Carbon
RC : Composition
RS : Metal oxide film
RW: winding
RN : Metal film
RK : Metal mixture
P : Pulse-resistant type
NL : Low noise type
NB : Non-burning type
FR : Fuse-resistor
F : Lead wire forming
2B : 1/8 W
2E : 1/4 W
2H : 1/2 W
3A : 1 W
3D : 2 W
3F : 3 W
3H : 5 W
F : ±1%
G:±2%
J : ±5%
K : ±10%
M : ±20%
Ex.: RN
Type
14K
Shape
and per-
formance
2E
Power
182
Resist-
ance
G
Allowable
error
FR
Others
*Resistance
1800ohm=1.8kohm1 8 2
Indicates number of zeros after effective number.
2-digit effective number.
1.2ohm1 R 2
2-digit effective number, decimal point indicated by R.
1-digit effective number.
: Units: ohm
●Capacitors
CE : Aluminum foil
electrolytic
CA : Aluminium solid
electrolytic
CS : Tantalum electrolytic
CQ : Film
CK : Ceramic
CC : Ceramic
CP : Oil
CM: Mica
CF : Metallized
CH : Metallized
HS : High stability type
BP : Non-polar type
HR : Ripple-resistant type
DL : For change and discharge
HF : For assuring high requency
U : UL part
C : CSA part
W : UL-CSA part
F : Lead wire forming
0J : 6.3 V
1A : 10 V
1C : 16 V
1E : 25 V
1V : 35 V
1H : 50 V
2A : 100 V
2B : 125 V
2C : 160 V
2D : 200 V
2E : 250 V
2H : 500 V
2J : 630 V
F : ±1%
G:±2%
J : ±5%
K : ±10%
M : ±20%
Z : ±80%
: - 20%
P : +100%
C : ±0.25pF
D : ±0.5pF
= : Others
Ex.: CE
Type
04W
Shape
and per-
formance
1H
Dielectric
strength
3R2
Capacity
M
Allowable
error
BP
Others
･Units:μF.
2200μF2 2 2
Indicates number of zeros after effective number.
2-digit effective number. ･Units:μF.
2.2μF2 R 2
2-digit effective number, decimal point indicated by R
1-digit effective number.
*Capacity (electrolyte only)
･When the dielectric strength is indicated in AC,"AC" is included after the dieelectric strength value.
*Capacity (except electrolyte)
･Units:pF
2200pF=0.0022μF2 2 2
Indicates number of zeros after efective number. (More than 2)
2-digit effective number. ･Units:pF
220pF2 2 1
2-digit effective number.
Indicates number of zeros after effective numver. (0 or 1)
NOTE FOR PARTS LIST
4
FATTENTION
Tous les IC et beaucoup d’autres semi-
conducteurs sont sensibles aux décharges
statiques (ESD).
Leur longévité pourrait être considérablement
écourtée par le fait qu’aucune précaution
n’est prise a leur manipulation.
Lors de réparations, s’assurer de bien être
relié au même potentiel que la masse de
l’appareil et enfiler le bracelet serti d’une
résistance de sécurité.
Veiller a ce que les composants ainsi que les
outils que l’on utilise soient également a ce
potentiel.
DWARNUNG
Alle IC und viele andere Halbleiter sind
empfindlich gegen elektrostatische
Entladungen (ESD).
Unsorgfältige Behandlung bei der Reparatur
kann die Lebensdauer drastisch vermindern.
Sorgen sie dafür, das Sie im Reparaturfall
über ein Pulsarmband mit Widerstand mit
dem Massepotential des Gerätes verbunden
sind.
Halten Sie Bauteile und Hilfsmittel ebenfalls
auf diesem Potential.
WAARSCHUWING
Alle IC’s en vele andere halfgeleiders zijn
gevoelig voor elektrostatische ontladingen
(ESD).
Onzorgvuldig behandelen tijdens reparatie
kan de levensduur drastisch doen
verminderen.
Zorg ervoor dat u tijdens reparatie via een
polsband met weerstand verbonden bent met
hetzelfde potentiaal als de massa van het
apparaat.
Houd componenten en hulpmiddelen ook op
ditzelfde potentiaal.
AVVERTIMENTO
Tutti IC e parecchi semi-conduttori sono
sensibili alle scariche statiche (ESD).
La loro longevita potrebbe essere fortemente
ridatta in caso di non osservazione della piu
grande cauzione alla loro manipolazione.
Durante le riparazioni occorre quindi essere
collegato allo stesso potenziale che quello
della massa dell’apparecchio tramite un
braccialetto a resistenza.
Assicurarsi che i componenti e anche gli
utensili con quali si lavora siano anche a
questo potenziale.
All ICs and many other semi-conductors are
susceptible to electrostatic discharges (ESD).
Careless handling during repair can reduce
life drastically.
When repairing, make sure that you are
connected with the same potential as the
mass of the set via a wrist wrap with
resistance.
Keep components and tools also at this
potential.
WARNING
Safety regulations require that the set be restored to its original condition
and that parts which are identical with those specified be used.
Veiligheidsbepalingen vereisen, dat het apparaat in zijn oorspronkelijke
toestand wordt terug gebracht en dat onderdelen, identiek aan de
gespecifieerde worden toegepast.
Bei jeder Reparatur sind die geltenden Sicherheitsvorschriften zu beachten.
Der Originalzustand des Gerats darf nicht verandert werden.
Fur Reparaturen sind Original-Ersatzteile zu verwenden.
Le norme di sicurezza esigono che l’apparecchio venga rimesso nelle
condizioni originali e che siano utilizzati pezzi di ricambiago idetici a quelli
specificati.
Les normes de sécurité exigent que l’appareil soit remis a l’état d’origine et
que soient utilisées les pièces de rechange identiques à celles spécifiées.
“Pour votre sécurité, ces documents
doivent être utilisés par des
spécialistes agrées, seuls habilités à
réparer votre appareil en panne.”
GB NL
I
D
I
F
GB
NL
LASER SAFETY
CAUTION VISIBLE AND INVISIBLE LASER RADIATION WHEN OPEN AVOID EXPOSURE TO BEAM
ADVARSEL SYNLIG OG USYNLIG LASERSTRÅLING VED ÅBNING UNDGÅ UDS
Æ
TTELSE FOR STRÅLING
ADVARSEL SYNLIG OG USYNLIG LASERSTRÅLING NÅR DEKSEL Å PNES UNNGÅ EKSPONERING FOR STRÅLEN
VARNING SYNLIG OCH OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD BETRAKTA EJ STRÅLEN
VARO! AVATT AESSA OLET ALTTIINA NÄKYVÄLLE JA NÄKYMÄTTÖMÄLLE LASER SÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN
VORSICHT SICHTBARE UND UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG GEÖFFNET NICHT DEM STRAHL AUSSETSEN
DANGER VISIBLE AND INVISIBLE LASER RADIATION WHEN OPEN AVOID DIRECT EXPOSURE TO BEAM
ATTENTION RAYONNEMENT LASER VISIBLE ET INVISIBLE EN CAS D'OUVERTURE EXPOSITION DANGEREUSE AU FAISCEAU
USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURE OTHER THAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.
AVOID DIRECT EXPOSURE TO BEAM
WARNING
The use of optical instruments with this product will increase eye hazard.
Repair handling should take place as much as possible with a disc loaded inside the player
WARNING LOCATION: INSIDE ON LASER COVERSHIELD
This unit employs a laser. Only a qualified service person should remove the cover or attempt to service this
device, due to possible eye injury.
030804ec
m
WARNING AND LASER SAFETY INSTRUCTIONS
5
SYSTEM CONFIGURATION
SPECIFICATIONS
• RCD-M38
• RCD-M38DAB
• D-M38S(RCD-M38/SC-M37)
SC-M37 : Refer to the service manual of SC-M37.
DIMENSION
nAudio section
Power amplifer
Rated output:
30 W + 30 W (6 Ω, 1 kHz T.H.D 10 %)
nTuner section
Receiving range (E2,EK model):
FM: 87.50 MHz – 108.00 MHzAM: 522 kHz – 1611 kHz
DAB (EK model): BAND3 170 MHz – 240 MHz
Receiving range (E3 model):
FM: 87.50 MHz – 107.9 MHzAM: 520 kHz – 1710 kHz
Usable sensitivity:
FM: 1.5 μV/75 Ω AM：20μV
DAB (EK model): –93 dBm
FM stereo separation: 35dB（1kHz）
nCDsection
Playback frequency response: 2Hz～20kHz
Wow & flutter:Below measurable limits (± 0.001%)
Sampling frequency: 44.1kHz
RCD-M38 SC-M37
nClock/Timersection
Clock method:Crystal oscillator (Within 1 – 2 minutes per month)）
Timer:Everyday/Once timer: One each
Sleep timer: 90 minutes, maximum
nGeneral
Power supply (E2,EK model):AC 230 V, 50 Hz
Power supply (E3 model):AC 120 V, 60 Hz
Power consumption:80 W
Approx. 0.3 W (standby)
Maximum external dimensions:
210 (W) x 115 (H) x 308.5 (D) mm
Weight: 4.3kg
nRemotecontrol(RC-1127)
Power supply:R03/AAA Type (two batteries)
Maximum external dimensions:
49 (W) x 220 (H) x 24 (D) mm
Weight:110 g (including batteries)
6
CAUTION IN SERVICING
InitializingSTEREOCDRECEIVER
STEREO CD RECEIVER initialization should be performed when the μcom, peripheral parts of μcom, and Digital PCB.
are replaced.
1. Turn off the power using ON/STANDBY button, unplug the power cord.
2. Plug the power cord into a power outlet while pressing 8 / - and SDB / TONE button simultaneously.
＊Initialize.
Service tools
Measuring Disc: CD/TCD-784
CD-R/TCD-R082W
CD-RW/TCD-W082W
z Refer to "MEASURING METHOD AND WAVEFORMS".
Service Jigs
When you repair the printing board, you can use the following JIG (Extension cable kit).
Please order to Denon Ofcial Service Distributor in your region if necessary.
943309004570M : DATA UPDATE KIT : 1 Set
(Refer to 26 page)
Note: • All user settings will be lost and this factory setting will be recovered when this initialization mode.
So make sure to memorize your setting for restoring after the initialization.
8/ - SDB / TONE
ON / STANDBY
7
DISASSEMBLY
• Disassembleinorderofthearrowofthegureoffollowingow.
• Inthecaseofthere-assembling,assembleitinorderofthereverseofthefollowingow.
• Inthecaseofthere-assembling,observe"attentionofassembling"it.
• Ifwirebundlesareuntiedormovedtoperformadjustmentorpartsreplacementetc.,besuretorearrangethemneatly
astheywereoriginallybundledorplacedafterward.
Otherwise,incorrectarrangementcanbeacauseofnoisegeneration.
HEAT SINK SUB ASSY
Referto "DISASSEMBLY
5. HEAT SINK SUB ASSY"
and"EXPLODED VIEW"
AMPUNIT
(Ref.No.ofEXPLODEDVIEW:C4)
DOOR
Referto "DISASSEMBLY
1. DOOR"
and"EXPLODED VIEW"
DOOR
(Ref.No.ofEXPLODEDVIEW:P9)
TOP CABINET
REAR PANEL SUB ASSY
Referto "DISASSEMBLY
6. REAR PANEL SUB ASSY"
and"EXPLODED VIEW"
SUBTRANSUNIT
(Ref.No.ofEXPLODEDVIEW:C6)
INPUTP.W.BUNITASSY
(Ref.No.ofEXPLODEDVIEW:C8)
DABMODULE(forEKmodel)
(Ref.No.ofEXPLODEDVIEW:C9)
TUNERMODULE
(Ref.No.ofEXPLODEDVIEW:C12)
FRONT PANEL SUB ASSY
Referto "DISASSEMBLY
2. FRONT PANEL SUB ASSY"
and"EXPLODED VIEW"
FRONTUNIT
(Ref.No.ofEXPLODEDVIEW:C1)
CD MECHANISM ASS'Y
Referto "DISASSEMBLY
3. CD MECHANISM ASS'Y"
and"EXPLODED VIEW"
CDMECHANISMASS'Y
(Ref.No.ofEXPLODEDVIEW:C10)
SPK UNIT
Referto "EXPLODED VIEW"
SPKUNIT
(Ref.No.ofEXPLODEDVIEW:C17)
GUIDE UNIT
Referto "EXPLODED VIEW"
GUIDEUNIT
(Ref.No.ofEXPLODEDVIEW:C5)
TRANS
Referto "EXPLODED VIEW"
TRANS
(Ref.No.ofEXPLODEDVIEW:C11)
MCU PCB UNIT ASSY
Referto "DISASSEMBLY
4. MCU PCB UNIT ASSY"
and"EXPLODED VIEW"
MCUPCBUNITASSY
(Ref.No.ofEXPLODEDVIEW:C2)
8
About the photos used for descriptions in the DISASSEMBLY" section.
• Thedirectionfromwhichthephotographsusedhereinwerephotographedisindicatedat"Directionofphotograph:***"
attheleftoftherespectivephotographs.
• Refertothetablebelowforadescriptionofthedirectioninwhichthephotosweretaken.
• Photographsforwhichnodirectionisindicatedweretakenfromabovetheproduct.
• ThephotographisRCD-M38EKmodel.
1. DOOR
(1) TakeofftheChuckingplateafterremovingscrews.
The viewpoint of each photograph
(Photografy direction)
［View from above］
Front side
Direction of photograph: B
Direction of photograph: D
Direction of photograph: C
Direction of photograph: A
Proceeding : TOP CABINET DOOR
→
Chucking plate
9
(2) OpentheCDtraybyturningtheDrivegearclockwise.
(3) DetachtheDOOR.
Drive gear
CD tray
DOOR
Direction of photograph: B
10
2. FRONT PANEL SUB ASSY
(1) Removethescrews.
(2) DisconnecttheconnectorwireandFFCcable,thenremovethescrews.
(3) Disconnecttheconnectorwire.
Proceeding : TOP CABINET DOOR
→FRONT PANEL SUB ASSY
→
View from bottom
cut
CN82
FFC cable
Outside of CD macha foot
Direction of
photograph: D
Direction of
photograph: C
CN83
FRONT PANEL SUB ASSY
Direction of photograph: B
Pleasereferto"EXPLODEDVIEW"forthedisassemblymethodofeachPCBincludedinFRONTPANELASSY.
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