Marantz 74 CD38/o1B User manual

74 CD38/o1B/02B/05B
Manual Compact disc player
DIGITAL AUDIO
TABLE OF CONTENTS
SECTION PAGE
1. TECHNICAL SPECIFICATIONS 3
2. WARNINGS 9
3. SERVICING HINTS -TOOLS 10
4. DISMANTLING INSTRUCTIONS 1
1
5. SERVICE TEST PROGRAM 12
6. CDM 12.1 START UP DIAGRAM 13
7. FAULTFINDING GUIDE CDM 12.1 14
8. FAULTFINDING GUIDE 20
9. SPECIFICATIONS MEASUREMENT 21
10. BLOCK DIAGRAM 23
11. WIRING DIAGRAM 24
12. CIRCUIT DIAGRAM and PRINTED BOARDS
12.1. POWER SUPPLY and TRANSFORMER CONNECTIONS 25
12.2. SERVO CIRCUIT DIAGRAM 26
12.3. DECODER CIRCUIT DIAGRAM 27
12.4. DAC CIRCUIT DIAGRAM 28
12.5. MONO BOARD LAYOUT 29
12.6. MAIN PANEL SOLDER SIDE 30
12.7. DISPLAY &KEYBOARD 31
13. EXPLODED VIEW LOADER &PARTS LIST 32
14. EXPLODED VIEW CABINET &MECHANICAL PARTS LIST 33
15. ELECTRICAL PARTS LIST 34
Please use this service manual with referring to the user guide (D.F.U) without fail.
PCS 89 146 model CD-38
4822 725 51151
First Issue 1997.9
225\y855010 ACT

MARANTZ DESIGN AND SERVICE
Using superior design and selected high grade components, MARANTZ company has created the ultimate in stereo sound.
Only original MARANTZ parts can insure that your MARANTZ product will continue to perform to the specifications for which
it is famous.
Parts for your MARANTZ equipment are generally available to our National Marantz Subsidiary or Agent.
ORDERING PARTS
:
Parts can be ordered either by mail or by Fax.. In both cases, the correct part number has to be specified.
The following information must be supplied to eliminate delays in processing your order
:
1.Complete address
2. Complete part numbers and quantities required
3. Description of parts
4. Model number for which part is required
5. Way of shipment
6. Signature :any order form or Fax. must be signed, otherwise such part order will be considered as null and void.
rUSA rCANADA
MARANTZ AMERICA, INC. LENBROOK INDUSTRIES LIMITED
440 MEDINAH ROAD 633 GRANITE COURT,
ROSELLE, ILLINOIS 60172- 2330 PICKERING, ONTARIO L1W 3K1
USA CANADA
PHONE: [phone] PHONE :[phone]
FAX :[phone] FAX ;416-831-6936
-EUROPE
MARANTZ EUROPE B.V.
P.O.BOX 80002
BUILDING SFF2
5600 JB EINDHOVEN
THE NETHERLANDS
PHONE :+31 >40 -2732241
FAX :+31 -40 >2735578
rPROFESmiONAL USA
SUPERSCOPETECHNOLOGiES, INC.
MARANTZ PROFESSIONAL PRODUCTS
1000 CORPORATE BLVD.. SUITE D
AURORA, ILLINOIS 60504 USA
PHONE :630 •820 -4800
FAX :[phone]
rBRAZIL
MARANTZ BRAZIL
Caixa Postal 21462
CEP 04698-970
Sao Paulo, SP. BRAZIL
PHONE :[phone]{Discagem Direta Gratuita)
FAX :[phone]
-PROFESStONAL CANADA
TC ELECTRONICS CANADA LTD
540 FIRING AVE.
BAIE D’URFE, QUEBEC H9X 3T2
CANADA
PHONE: [phone]
FAX :[phone]
rTHAILAND
MRZ STANDARD CO., LTD,
746 -750 WANGBURAPA BANGKOK
10200 THAILAND
PHONE: [phone]
FAX :[phone]
rTRADING
MARANTZ EUROPE B,V,
P.O.BOX 80002
BUILDING SFF2
5600 JB EINDHOVEN
THE NETHERLANDS
PHONE :[phone]
FAX :[phone]
rHONG KONG
FORWARD INTERNATIONAL CORP.LTD.
15TH FLOOR, REGENT CENTRE,
88 QUEEN’S ROAD. CENTRAL. H. K.
PHONE :[phone]
FAX :[phone]
pTAIWAN rMALAYSIA
PAI-YUING CO„LTD. WO KEE HONG ELECTRONICS SDN. BHD.
6TH FL NO, 148 SUNG KIANG ROAD. NO. I02 JALAN SS 21/35, DAMANSARA
TAIPEI, 10429, TAIWAN R.O.C. UTAMA, 47400 PETALING JAVA
PHONE :[phone]SELANGOR DARUL EHSAN,
FAX :[phone] MA LAYS lA
PHONE :[phone]
FAX :[phone]
“JAPAN Technical
MARANTZ JAPAN INC.
35- 1,7- chome, Sagamiono
Sagamihara -shi, Kanagawa
Japan
PHONE :[phone]
FAX :[phone]
pSINGAPORE
B^^TP >VW^^
t228
FORWARD MARKETING (SINGAPORE) PTE. LTD.
29, LENG KEE ROAD
SINGAPORE 159099,
7-35-1 PHONE :[phone]
^^2^86 T150 FAX :[phone]
1-11-9
SHOCK, FIRE HAZARD SERVICE TEST :
CAUTION :After servicing this appliance and prior to returning to customer, measure the resistance between either primary AC
cord connector pins (with unit NOT connected to AC mains and its Power switch ON ), and the face or Front Panel of product and
controls and chassis bottom.
Any resistance measurement less than 1Megohms should cause unit to be repaired or corrected before AC power is applied, and
verified before it is return to the user/customer.
Ref.UL Standard NO. 1492.
In case of difficulties, do not hesitate to contact the Technical
Department at above mentioned address.
PCS 89 147
970408ACT

3
TECHNICAL SPECIFICATIONS
General
1.
Mains voltage /01B
/02B
/04B(F B)
/05B
/06B(U BL)
/07B
2.
Mains frequency
3.
Mains voltage selection only /01
B
4.
Power consumption mains standby
operated
Remote Control
Internal: RC5
Line output
1. Number of channels
2.0utput voltage
3.Unbalance left-right
4.0utput resistance
5. Frequency response from 20 Hz to 20 kHz
6. Phase non-linearity from 20 Hz to 16 kHz
from 16 kHz to 20 kHz
7.0ut-band attenuation
S.Signal to noise ratio from 20 Hz to 20 kHz
with digital silence
A-weighted
O.Dynamic range (-60 dB) 1kHz
from 20 Hz to 20 kHz
lO.Total harmonic distortion +noise
1kHz
from 20 Hz to 20 kHz
1 1 .Channel separation 1kHz
from 20 Hz to 20 kHz
with digital silence detection
12.Automatlc switched deemphasis with time constant 15/50 ^s
Variable headphone (CD46 only)
1.Output voltage
2. Unbalance left-right
3.0utput resistance
4. Load impedance range
5.0utput power
6.Slgnal to noise ratio
7.Dynamic range
S.Total harmonic distortion
O.Channel separation
Dimensions and weight
1.Apparatus tray closed
2.
Apparatus tray open
3.
Welght
Opticai read-out system
1.Laser type
2.
Wavelength
3.
Llght output (c.w.)
110-127V/220-240V
220V-230V
100V
230-240V
120V
230-240V
50-60 Hz
Voltage selector 2positions
<3W
<low
2
2Vrms ±3dB
max. 1dB
1kQ
typ. ±0.3 dB
max. ±0.6 dB
with de-emphasis ±2dB
max. 7.0°
max. 32°
min. 35 dB above 40 kHz
typ. 95 dB(min. 90 dB)
typ. 110dB (min. 100 dB)
typ. 98 dB
typ. -94 dB(min. -90 dB)
min. -85 dB
typ. -85 dB(mln. -78 dB)
min. -75 dB
typ. 95 dB(min. 86 dB)
min. 82 dB
typ. 110 dB(min. 100 dB)
:max. 5Vrms ±3dB
:max. ±1.2 dB
:120 Q
:32 Qto 600 Qload
:0to 30 mW into 30 Qload
:0to 50 mW Into 150 Qload
:0to 30 mW into 600 Qload
;typ. 80 dB (1 kHz)
:min. 70dB (20 Hz -20 kHz)
:min. 60 dB (20 Hz -20 kHz)
:min. 70 dB (1 kHz)
:min. 65dB (31.5 Hz -16 kHz)
WxDxH 435 X260 x90 mm
WxDxH 435 X405 x90 mm
3kg
Semiconductor AIGaAs
780 nm ±20 nm
max. 0.5 mW
PCS 6Q 972

9
WARNING
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 awrist wrap with resistance.
Keep components and tools also at this
potential.
ATTENTION
Tous les 1C et beaucoup dautres
semi-conducteurs sont sensibles aux
decharges statiques (ESD).
Leur longevite pourrait etre considerablement
ecourtee par le fait qu'aucune precaution nest
prise ateur manipulation.
Lors de reparations, sassurer de bien etre relie
au meme potentiel que la masse de I’appareil et
enfiler le bracelet serti dune resistance de
securite.
Veiller ace que les composants ainsi que les
outils que Ion utilise soient egalement ace
potentiel.
ESD
WARNUNG
Alle ICs und viele andere Halbleiter sind
empfindlich gegen elektrostatische Entladungen
(ESD).
Unsorgfaltige Behandlung bei der Reparatur
kann die Lebensdauer drastisch vermindern.
Sorgen sie dafur, dass Sie im Reparaturfall
liber ein Pulsarmband mit Widerstand mit dem
Massepotential des Cerates verbunden sind.
halten Sie Bauteile und Hilfsmittel ebenfalls auf
diesem Potential.
(n^ waarschuwing
Alle IC's en vele andere halfgeleiders zijn
gevoelig voor electrostatische onttadingen
(ESD).
Onzorgvuidig behandelen tijdens reparatie kan
de levensduur drastisch doen verminderen.
Zorg ervoor dat utijdens 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.
(T) AVVERTIMENTO
Tutti IC eparecchi semi-conduttori sono
sensibili alle scariche statiche (ESD).
La loro longevita potrebbe essere fortemente
ridatta In caso di non osservazione della piu
grande cauzione alia loro manipolazione.
Durante le riparazioni occorre quindi essere
collegato alio stesso potenziale che quello della
massa dell apparecchio tramite un braccialetto
aresistenza.
Assicurarsi che icomponent! eanche gli utensili
con quali si lavora siano anche aquesto
potenziale.
Safety regulations require that the set be restored to its original
condition and that parts which are identical with those specified be
used.
Bei jeder Reparatur sind die geltenden Sicherheitsvorschriften zu
beachten. Der Originaizustand des Gerats darf nicht verandert werden
fiir Reparaturen sind Original-Ersatzteile zu verwenden.
Veiligheidsbepalingen vereisen, dat het apparaat in zijn oorspronkeiijke
toestand wordt teruggebracht en dat onderdelen, identiek aan de
gespecificeerde worden toegepast.
O
Le norme di sicurezza esigono che I’apparecchio venga rimesso nolle
condizioni original! eche siano utilizzati pezzi di ricambiago identic! a
quelli specificati.
Les normes de securite exigent que I'appareil soit remfs aI'etat d'origine
et que soient utilisees les pieces de rechange identiques acelles
specifiees.
CAUTION
VARO!
VARNING
ADVERSEL
DANGER
VORSICHT
INVISIBLE LASER RADIATION WHEN OPEN. AVOID EXPOSURE TO BEAM.
AVATTAESSA OLET ALTTIINA NAKYMATTOMALLE LASER SATTEILYLLE ALA KATSO SATEESEN.
OSYNLIG LASERSTRAlNING NAR DENNA DEL AR OPPNAD BETRAKTA EJ STRAlEN.
usYNLiG laserstrAling ved Abning, undgA unsaettelse for strAling.
INVISIBLE LASER RADIATION WHEN OPEN. AVOID DIRECT EXPOSURE TO BEAM.
UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG GEOFFNET, NICHT DEM STRAHL AUSSET2EN.
SHOCK, FIRE HAZARD SERVICE TEST:
CAUTION: After servicing this appliance and prior to returning to customer, measure the resistance
between either primary AC cord connector pins(with unit NOT connected to AC mains and its Power
switch ON), and the face or Front Panel of product and controls and chassis bottom.
Any resistance measurement less than 1Megohms should cause unit to be repaired or corrected before
AC power is applied, and verified before return to user/customer.
Ref. UL Standard N0.1492.
NOTE ON SAFETY:
Symbol AFire or electrical shock hazard. Only original
parts should be used to replace any part marked with
symbol A. Any other component substitution(other than
original type), may increase risk or fire or electrical shock
hazard.
"Pour votre securite, ces documents
doivent ^tre utilises par des specia-
listes agrees, seuls habilites dreparer
votre appareil en panne"
PCS 60 978

SERVICING HINTS
10
In the set chip components have been applied. For disassembly and assembly of chip components see the figure
below.
SERVICE TOOLS
Audio signals disc
Disc without errors(SBC444) +
disc with DO errors, black spots and fingerprints(SBC444A)
Disc(65 min 1kHz) without no pause
Max. diameter disc(58.0 mm)
Torx screwdrivers
Set(straight)
Set(square)
13th order filter
4822 397 30184
4822 397 30245
4822 397 30155
4822 397 60141
4822 395 50145
4822 395 50132
4822 395 30204
Dr'Q an Q7Q

11
DISMANTLING INSTRUCTIONS
OPEN EXPLODED VIEW ON PAGE 33
HAS1124
9345
PCS 60 674

SERVICE TEST PROGRAM 12
ERROR MESSAGES
-"SLEDGE ERROR"
-“FOCUS ERROR-
-“RADIAL ERROR-
."MOTOR ERROR*
-"EEP ER“
-"EEPOK-
KAS1120
9342
Pxxx= PROGRAM OF MICROPROCESSOR
XX =VERSION OF PROGRAM
PCS 60 675

CDM 12.1 start up diagram.
13
Power up
PCS 60 676

FAULT FINDING GUIDE CDM 12.1
Main Fault Finding Guide CDM 12.1
System
14
Listen to kind of "scratching
sound" whiie siowiy turning the
disc by hand.
Disc is turning ciock wise at
normai speed.
Activity on RAD+
(pin 4connector 1052)
*After "play" starts at track 1at time 0:00.
*Go to outer track and start again at time
0:00 after max. 6seconds.
*Try search function.
*When going from "Pauze" to "play" music
has to restart at the same place.
Check focus path
See page 15
Check light path
See page 16
Check
turntable motor
path
See page 17
Check
radial tracking
path
See page 18
Functional test
See page 19
PCS 60 677

15
1)-Turntable and disc free?
Audible and visible control.
2)-Actuator movement?
Visual control.
3)-Signals on actuator o.k.?
Triangle wave without disc.
See fig 1.
2Volt
-2 Volt
4)-Connections to actuator o.k.?
Check flex connector pin 2and 3.
5)-Communication uP <-> IC7000.
SIDA activity (pin 27 of IC7000).
6)-Focus output o.k.?
See fig 2.
Measure with an 10k/3n3 low-pass filter.
7)-Components o.k.?
Check components R3010,R3011
C2012,C2013
X-tal 1000
2.7 Volt pp
8)-Power supply for opamp o.k.?
Check components R3006,R3007
C2008,C2009,C2071 ,C2074
9)-Check components o.k.?
Check components R3074,R3075,R3076,R3077
R3078.R3079
C2075,C2076
10)
&11)-Pin 17 of IC7000: afrequency of 8.46MHz?
PCS 60 678

16

1)
-Still in focus (focus o.k.?).
Voltage at pin 9of connector 1052 >15mV.
2)
-HF-signal present.
VHFI (R3048) >900mV pp. (testpoint 65).
3)
-Check HF-ampiifier.
*Sypply 5V?
*Testpoint 17=1 .4...1 .9V DC?
*VHFI DC =2.9...3.6V?
4)-V motor o.k.?
Vmotor <2V: replace CDM.
Vmotor >2V: check decoder part.

18

15 15
1)-Turntable and disc free?
Audible and visible control.
2)-Actuator movement?
Visual control.
3)-Signals on actuator o.k.?
Triangle wave without disc.
See fig 1
.
2Volt
-2 Volt
4)-Connections to actuator o.k.?
Check flex connector pin 2and 3.
5)-Communication uP <-> IC7000.
SIDA activity (pin 27 of IC7000).
6)-Focus output o.k.?
See fig 2.
Measure with an 10k/3n3 low-pass filter.
7)-Components o.k.?
Check components R3010,R3011
C2012,C2013
X-tal 1000
8)-Power supply for opamp o.k.?
Check components R3006,R3007
C2008,C2009,C2071 ,C2074
9)-Check components o.k.?
Check components R3074,R3075,R3076,R3077
R3078.R3079
C2075,C2076
10)
&11)-Pin 17 of IC7000: afrequency of 8.46MHz?
PCS 60 618

16 16
WARNING !!!LASER DAMAGE !!!
For measurements on the laser (flexconnector pin 1052-6), certain conditions are absoiutely
necessary for precaution of iaser damage.
The instruction and sequence for measuring iaser current is as foliows:
-turn off mains power.
-wait for >1second
-connect a muitimeter (high input impedance, not grounded accross resistor 3022. (*)
-turn on mains power and go to piay mode.
-reading of measurement value (current =reading/4R7) (**)
-go to stop and turn off mains power.
-disconnect the multimeter.
*in case of alaser voltage measurement, connect the multimeter accross elcap 2025,
using the same procedure as mentioned above.
**If current is >95 mA, you can be sure that the laser is defect;
If the current is increasing during reading (within +/- 10 seconds), you can be sure
that the laser is severely damaged.
*1)-Laser supply o.k.?
Voltage accross C2025: 4...5V
**2)-Laser current o.k.?
Voltage accross R3022: 150...450mV
3)
-Lens clean?
Visual control. Check for dust,grease.
Take attention for the blue coating.
4)
-Check inputs.
Switch back to service mode 0.
Connect a2.4 MOhm resistor from
1052 -9to 5V: Voltage on pin 5of IC7000 <50mV.
1052 -10 to 5V: Voltage on pin 6of IC7000 <50mV.
1052 -12 to 5V: Voltage on pin 7of IC7000 <50mV.
1052 -11 to 5V: Voltage on pin 10 of IC7000 <50mV.
1052-8 to 5V: Voltage on pin 11 of IC7000 <50mV.
5)-Diodes o.k.?
Use IR LED of remote control.
Ahalf sine wave must be measured on the diodes (on pin 8,9,10,11,12 of conn. 1052)
in the lOmV range.
*6)-V guard o.k.?
Voltage accross C2025: 4...5V
7)-Check connections between main PCB and CDM
8)-Flex o.k.?
Measure diode functions on CDM-flex
9)-Check components around IC7061
R3022,R3021,R3020
C2025,C2060,C2064
10)-LD ON voltage o.k.?
Measure on pin 2of IC7000:4...5V.
PCS 60 679

17 17
N
Replace by
old CDM
Check
decoder
Replace
CDM Check I
Ilightpath
Problem
solved?
1)-Stlll in focus (focus o.k.?).
Voltage at pin 9of connector 1052 >15mV.
2)
-HF-signal present.
VHFI (R3048) >900mV pp. (testpoint 65).
3)
-Check HF-amplifier.
*Sypply 5V?
*Testpoint 17=1 .4...1 .9V DC?
*VHFI DC =2.9...3.6V?
4)
-V motor o.k.?
Vmotor <2V: replace CDM.
Vmotor >2V: check decoder part.
PCS 60 6«a

18
1)
-Radial tracking o.k.?
No OTD (testpoint 67) activity.
2)
-Check driver 7060A.
Suppiy: C2071,C2Q74.
Components: C2067,C2068,C2069,R3068,R3069,R3070,R3071 ,R3072,R3073.
3)
-Check connections radiai actuator.
Switch power off.
Measure impedance of 18 Ohm(-i-/-20%) between pin 1and pin 4of connector 1052.
4)
-Check impedance on fiex.
Power off.
Disconnect CDM-fiex.
Measure impedance of 18 0hm(-i-/-20%) between pin 1and pin 4of connector 1052.
5)
-Test siedge.
Power on.
invoke service mode 0.
Move siedge out (whith search forward key).
Siedge moves to init position after reieasing key.
Not o.k. if siedge doesn’t move,doesn’t reach the outer position or makes aratiing
noise at the inner side.
6)-Check driver 7061 B.
Suppiy: C2060,C2064.
Components: C2062,C2063,C2066,R3060,R3062,R3064,R3065,R3066,R3067.
70*Check connections of siedge drive.
Power off.
Measure impedance of 11 Ohm(+/-20%) between pin 5and pin 6of connector 1070.
8)-Check siedge motor.
Remove CDM.
Measure impedance of 11 Ohm(+/-20%) between motor terminais.
PCS 60 681
18

FAULTFINDING GUIDE 20
HAS1123
9345
PCS 60 683

21
SPECIFICATIONS MEASUREMENT
SIGNAL AUDIO SIGNALS DISC 1TESTPOINT REMARKS
ANALOG OUT LEFT TOTAL HARMONIC DISTORTION
TRACKS 10-23 FILTER
OUTPUT
SEE
TECHNICAL
DATA
SEE
DRAWING
ANALOG OUT RIGHT
ANALOG OUT LEFT SIGNAL-TO-NOISE RATIO
TRACK 1REFERENCE LEVEL
TRACK 49
FILTER
OUTPUT
SEE
TECHNICAL
DATA
SEE
DRAWING
ANALOG OUT RIGHT
FILTER =13TH ORDER FILTER 4822 395 30204
e.g. SOUND TECHNOLOGIE
ST1700B
PCS 60 684