Marantz 74CD50 User manual

Compact disc player 74CD50/o015/028/048/058
CONTENTS Ist:
1 Explanation of the layout DIGITAL AUDIO
2 Controls and technical specification
3 Servicing hints
4 Exploded view
5 Measurements and adjustments
6 Circuit diagrams, power supply, voltage adapter
7 Control & display panel
8 Wiring diagram, Voltage adapter
9 Electrical parts list
10 List of symbols
@
Safety regulations require that the set be restored to its original Bei jeder Reparatur sind die geltenden Sicherheitsvorschriten zu
condition and that parts which are identical with those specified be beachten. Der Originalzustand des Gerats darf nicht veraéndert werden
used. fir Reparaturen sind Original-Ersatzteile zu verwenden.
@® >)
Veiligheidsbepalingen vereisen, dat het apparaat in zijn oorspronkelijke Le norme di sicurezza esigono che l’'apparecchio venga rinesso nelle
toestand wordt teruggebracht en dat onderdelen, identiek aan de condizioni originali e che siano utilizzati pezzi di ricambiago identici a
gespecificeerde worden toegepast. quelli specificati.
©
Les normes de sécurité exigent que |’appareil soit remis a l'état d'origine
et que soient utilisées les pieces de rechange identiques a celles
spécifiées.
CLASS 11
LASER PRODUCT
3122 110 03420
Dokumentation
Documentazione
di
Servizio
Huolte-Ohje
Manua!
de
Servicio
Manta
|
de
Servicio
Documentation lechniaue
Subject to modification
4822 725 22387 Fee by Service
Consumer Electronics
Printed in The Netheriands
©Copyright
reserved
CS
22
108

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
MARANTZ INTERNATIONAL
Vestdijk 9
5600 MD_ Eindhoven
The Netherlands
Phone: [phone]
Telefax: +31/40.75.82.99
available to our National Marantz Subsidiary or Agent.
ORDERING PARTS:
Parts can be ordered either by mail or by telex. In both
cases, 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
. Way of shipment
Oupw
. Description of parts
. Model number for which part is required
. Signature: any order form or telex must be signed
otherwise such part order will be considered as null
and void.
PARTS ORDERING
Parts may be ordered at the following addresses:
AUSTRIA
HORNYPHON
Vertriebsgeselischaft GmbH
Wienerbergstrasse 1
A1101 Wien
Austria
Telex: 132.332
BELGIUM
SVD DIVISION MARANTZ
Industrialaan 1
1720 Groot-Bijgaarden
Belgium
Telex: 24466
CHILE
MARANTZ
DIVISION OF PHILIPS S.A.
AV. Santa Maria, 0760
Casilla 2687
Santiago
Telex: 240.239
DENMARK
MARANTZ
DIVISION OF PHILIPS
SERVICE A/S
Prags Boulevard 80
Postbox 1919
DK-2300 Kabenhavn S
Denmark
Telex: 31201
FINLAND
MARANTZ
DIVISION OF OY PHILIPS Ab
Kaivokatu 8
00100 Helsinki
Finland
Telex: 124811
FRANCE
MARANTZ FRANCE
4 Rue Bernard Palissy
92600 Asniéres
France
Telex: 611651
GERMANY
MARANTZ GERMANY GmbH
Max-Planck-Strasse 22
6072 Dreieich 1
Germany
Telex: 529821
THE NETHERLANDS
Elpro Marantz
Wint Hontlaan 28
3526 KV Utrecht
The Netherlands
Telex: 4748
NORWAY
MARANTZ
DIVISION OF PHILIPS A/S
Sandstuveien 40
0680 Oslo 6
Norway
Telex: 72640
GREAT BRITAIN
MARANTZ AUDIO U.K. Ltd
Unit 15/16
Saxon Way Industrial Estate
Moor Lane
Harmondsworth UB7 OLW
Great Britain
Telex: 935196
GREECE
SHERTON ELECTRONICS S.A.
P.O.Box 21025
Hippocratus Street 188
Athens 11471
Greece
Telex: 216.795
JAPAN
MARANTZ JAPAN, Inc.
35-1, 7-chome, Sagamiono
Sagamihara-shi, Kanagawa
Japan
KUWAIT
AL ALAMIAH ELECTRONICS
Ussama Building
Fahd al Saleem Street
P.O.Box 23781
Safat-Kuwait
Telex: 22694
ITALY
MARANTZ ITALIANA S.P.A.
Via Chiese, 74
20126 Milano
Italy
SAUDI ARABIA
AL ALAMIAH ELECTRONICS
P.O.Box 5954
University Street
Riyadh 11432
Saudi Arabia
Telex: 401530
SOUTH AFRICA
MARANTZ
DIVISION OF PHILIPS S.A.
Main Road Martindale
P.O. Box. 58088
Newville 21114
South Africa
SPAIN
PHONO S.A.
Ignacio iglesias 10
Badalona (Barcelona)
Spain
Telex: 59355
SWEDEN
MARANTZ
DIVISION OF PHILIPS
Forsdljning AB
Tegeluddsvagen 1
S-115 84 Stockholm
Sweden
Telex: 14060
Telex: 35000 PHTC NL routing IND NLMTFAT
SWITZERLAND
DYNAVOX ELECTRONICS
Route de Villars 105
1701 Fribourg
Switzerland
Telex: 942377
TURKEY
DOGRUOL Ltd.
1.M.C.
6 Blok N°6310
Unkapani
Istanbul
Turkey
Telex: 22085
MALTA
CACHIA & GALEA
Republic Street, 68D
Valetta
Telex: 1682
PORTUGAL
MARANTZ
Divisao philips S.A. service
Outurela-carnaxide
2795 LinDA-A-VELHA
Telex: 43906
All of the above locations are fully equipped to take care of your total service needs. Because various countries have
differing configuration requirements, it is necessary that you contact the service facility in your particular country. In
the event that there is no service location listed for your country, please, contact the nearest facility for the necessary
In case of difficulties, do not hesitate to contact the Technical
Department at abovementioned address.
assistance.
|

1. EXPLANATION OF THE LAYOUT OF THE
DOCUMENTATION
The documentation consists of chapters.
The number of the chapter is indicated by the first digit
of the page number.
The second digit of the page number is the sequence
numbering.
If modifications or supplements require new
supplementary or replacement pages, the page
number is extended with a third part:
A digit behind the page number indicates that it
concerns a supplementary page.
A replacement page is indicated by a letter behind the
page number.
Example
3-6 is page 6 of chapter 3
3-6-1 is a supplementary page behind page 3-6
3-6-a is the replacement page of page 3-6 (so
page 3-6 can be removed from the
documentation).
GENERAL DISMOUNTING
VACUUM PISTON
SOLDERING _ \.,\4822 395 10082
{RON
SOLDER WICK
4822 321 40042
e.g. A PAIR OF TWEEZERS
S B
‘Ss
ty) HEATING
Vs
HEATING
x
SOLDERING IRON
CHIP
COMPONENT
SOLDER SOLDER
COPPER TRACK
P.C.B.
SOLDER WICK CLEANING
PRECAUTIONS
SOLDERING
IRON
SOLOERING
IRON
CHIP
COMPONENT
SERVICE PACKAGE
1-1
MOUNTING
e.g. A PAIR OF TWEEZERS
¥ ‘sy
SOLDER
SOLDERING PRESSURE
Va ¥
SOLDERING TIME SOLDER
<3 sec/side @0.5- 0.8mm
PRESSURE / SOLOERING
¥ ( IRON
EXAMPLES
27 012C12
CS 22 109

2-1
CONTROLS
NN OHINOD 3LONTE
CO & Co
REMOTE
FRONT OF PLAYER
1 Disc tray on which the OPEN key is situated; the tray
closes when the front is pressed briefly.
2 REMOTE SENSOR
Receives the signals from the remote control handset.
3 DISPLAY
- Informs you about the functioning of the player.
— Displays details from the disc contents list.
4 PLAY-REPLAY (>)
— Starting play (PLAY)
— Returning to the beginning of a track (REPLAY)
5 PAUSE (Il)
Interrupting play.
6 ON/OFF
Switching on and off.
7 RECALL
Reviewing a programme.
8 PROGRAM MODE
- Selecting PROGRAM mode when storing a
program.
- Selecting EDIT mode to enter the recording time
when making a tape recording.
9 ’1-0’ digit keys
- Selecting another track number during play.
~ Selecting a track number to start play with.
- Selecting track numbers when programming.
- Entering the recording time when making a tape
recording.
10 MEMO
- Storing track numbers in a program.
~ Storing the recording time when making a tape
recording.
11 CANCEL
~ Erasing track numbers you do not wish to include in
a program.
- Erasing track numbers from a program.
- Erasing favourite track selections.
CS 22 110
ANALOG
MDA.02152
917/T19
12 <«
Fast search for a particular passage; backwards to
the beginning of the disc.
13 Kd DD}
— Selecting another track number during play.
— Selecting a track number to start play with.
— Selecting track numbers when programming.
(I4 from high to low; PR from low to high).
14 PHONES BU-5
Connecting headphones.
15 STOP/CM
— Stopping play (STOP).
- Erasing a program (CM = Clear Memory).
16 RPT
Repeating a track, the entire disc or a program
(RPT = repeat).
17 RANDOM
Playing in a random order.
18 »> :
Fast search for a particular passage; forwards to the
end of the disc.
REMOTE CONTROL FUNCTIONS
Most of the controls also appear on the remote control
handset. The functions below con only be operated using
the remote control handset:
19 FTS
Activating the Favourite Track Selection circuit.
20 AMS
Automatically playing the beginning of each track
(AMS = Automatic Music Scan).
21 A-B
Storing the start and stop points of a passage to be
repeated.

22 w VOLUME A
Adjusting the sound level when the player is
connected via the VARIABLE-output to an amplifier or
HiFi system without its own remote control (w from
high to low; & from low to high).
3 <— INDEX —~
~ Selecting another index number during play.
— Selecting an index number to start play with.
( <— from high to low; —~ from low to high).
24 TIME
Selecting the time information you want to see:
— REMAIN: The remaining playing time of a track.
— TOTAL REMAIN: The remaining playing time of the
entire disc or a program.
~ The elapsed playing time of a track.
For the best reception of the signals from the remote
control you should aim it as directly as possible at the
REMOTE SENSOR.
CONNECTIONS REAR OF PLAYER
~ All connections to the rear panel should be made with
the power to the entire system switched off.
- To avoid cross-connection of channels, connect one
plug at a time.
25 ANALOG OUTPUTS
VARIABLE (BU-3): For connection to an amplifier of
HiFi system without its own remote control.
FIXED (BU-2 Line out L/R): For connection to a
MARANTZ amplifier of HiFi system with its own
remote control.
@ Insert a red plug into the ’R’ socket (right-hand
channel) and the other plug into the ’L’ socket
(left-hand channel) of the VARIABLE output or the
FIXED output. In the case of connection via the
VARIABLE output, the sound level can be adjusted
with the w VOLUME a keys on the remote control.
@ Insert the two other plugs into the corresponding
sockets of the CD or AUX input of your amplifier.
You can also use the TUNER or TAPE IN connection,
but never the PHONO input. This is not suitable for
Compact Disc reproduction.
26 DIGITAL OUTPUT OPTICAL BU-2-Digital out
This output supplies a digital signal via an optical
path; for this reason it can only be connected to a
Digital Analog Converter, an amplifier with an optical
digital input or a digital sound processor. For this use
an optical lead.
To prevent dirt entering this output, it is covered with
a little cap which should only be removed when the
output is in use.
27 REMOTE CONTROL IN/OUT BU-2 RCS IN/OUT
- For connecting up the equipment when you are
incorporating the player in a MARANTZ HiFi system
with its own remote control system.
For this use the RC5 cable supplied.
- For connecting the remote contro! receiver RC 55,
available as an accessory, if the siting of the changer
prevents its REMOTE SENSOR from receiving the
signals from the remote control directly.
28 DIGITAL OUTPUT COAX BU-4
For digital signal processign or future applications
such as CD-I.
This output supplies a digital signal and can therefore
only be connected to an input which is suitable for
this signal. Use here a lead with one cinch plug on
either end.
WARNINGI .
Never connect this socket to a non-digital input of an
amplifier, suvn as AUX, CD, TAPE, PHONO, etc. This can
damage the amplifier and the loudspeakers.
2-2
44 229 Ai1
REMOVING THE TRANSIT CLAMPS
The two red transit clamps on the underside of the
player lock the player mechanism to secure it during
transportation.
Remove these transit clamps before using the player
Store them in the recesses provided
Refit them before transporting the player
TECHNICAL SPECIFICATION
@ System
@ Disc diameter
@ Mainsvoltages/02/05
/04
/06
/01
e@ Mains frequencies
Power consumption
Frequency range
Output voltage fixed
Output impedance
S/N ratio
Channel separation
Channel difference
Total harmonic
distortion
@ Intermodulation
distortion
@ De-emphasis
@ Dimensions WxDxH
@ Weight
: Compact Disc Digital
Audio system
: 120mm/80mm
: 110 V, 127 V, 220 V, 240 V
+ 10% (to bechanged by
transformer connections)
> 100 V + 10%
:117V + 10%
>110 V, 127 V, 220 V +
10% (to be changed by
carousel switch)
: 50,60 Hz(no adaption
required)
: <25 W
: 20 Hz + 20 kHz +0,1 dB
: max. 2 V ,,/= 10 kOhms
: 200 Ohms
: =96 dB
: 293 dB
: <0,2 dB
: <-88 dB
: <-88 dB
: 0 or 15/50 psisswitched by
the subcode
on the disc)
: 420 x 117 = 1&8 mm
(tray closed)
: approx 5 kg
CS 22 111

3-1
3. SERVICING HINTS
ESD A
Ates
All ICs and many other semi-conductors are susceptible
to electrostatic discharges (ESD).
Careless handling during repair can drastically reduce life
expectancy.
When repairing, make sure that you are connected via a
wrist wrap with resistance to the same potential as the
chassis of the set. Keep components and aids also at
the same potential.
When the tray mechanism and CDM-unit has been
disassembled the player can be prepared for
measurements by bridging the "tray detection” switch
SK2 on the main panel.
Service disc hold-down
The disc should always rest properly on the turntable.
To achieve this a disc hold—down has been mounted in a
bracket of the tray mechanism.
If the tray mechanism has to be disassembled for
servicing, a separate disc hold-down should be used. For
a service disc hold—down see the figure below.
Compose a service Disc hold-down in the following way.
- Cut in the most inner ring of a disc holddown (4822
462 50383) with small and sharp nippers
See fig. below.
- Enlarge the diameter of the innermost ring slightly with
the hind part of a pencil or ballpoint, so that it jams
onto the turntable with sufficient force.
- If the jamming force decreases after certain time of
use, the diameter has to be enlarged with a pencil or
ballpoint again.
Explanation of the symbols used
= oscilloscope (ri = 10 MQ)
cD
= meter (voltmeter with ri = 10 MQ)
° °
= carry out alignment/adjustment
ON
test point
42 565 A12
CS 22 112
SERVICE TOOLS
Audio test disc 1
Disc without errors +
disc with DO errors,
black spots and fingerprints
Disc (65 min, 1kHz)
without pause
Maximum diameter disc
Torx screwdrivers
Set (straight) 4822 395 50145
Set (Square) 4822 395 50132
13th order filter 4822 395 30204
4822 397 30185
4822 397 30096
4822 397 30155
4822 397 60141
WORKING WITH THE FAULTFINDING TREE
Follow the path of the faultfinding tree, beginning at
the top left. Perform the actions you come across in
the various blocks.
Look at the various side branches to find out if the
information you see there applies to your problem. If,
for instance, you find the indication display _, this
means that no picture appears on the display. If you
establish this fault, follow the branch and perform the
recommended actions. Check the components
mentioned. In a number of branches further reference
is made to measurements you could carry out. These
measurements are explained in several tables further
on in this manual.
EXTENSION CABLE
CONTACT SIDE
REMOVE
as BLUE STRIP
SOLDERING
IRON
a
SOLDER
wa see? 0.5-0.8mm
ee
MAIN
PRINTED
CIRCUIT
BOARD
~~
ee

CABINET DISASSEMBLY HINTS
CONTROL+DISPLAY PANEL.
© ©
3MX16 3MX16
EVA.00846
916/T19
CS 22 113

FOIL CONNECTION POSITION.
SERVICE POSITION PLAY
EVA.00849
916/T19
CS 22 114
PLAY-SERVICE POSITION
EVA.00848
916/T19
MEASURING AND ADJUSTMENT POSITION
OF THE SET
MDA.02138
916/T19
MECHANICAL PARTS
201
201
202
202
203
204
204
206
207
207
208
208
209
210
210
211
212
213
214
214
215
216
217
218
219
219
221
222
223
224
224
226
227
228
229
231
232
233
234
235
236
237
237
238
239
241
242
243
244
246
247
248
249
251
252
253
254
256
257
258
261
4822 444 40308
4822 444 40316
4822 459 10747
4822 459 10887
4822 450 61359
4822 460 20768
4822 460 20771
4822 460 20762
4822 464 50764
4822 464 50773
4822 402 61254
4822 402 61266
4822 460 20763
4822 321 10492
4822 321 10445
4822 460 20766
4822 321 10457
4822 321 10522
4822 218 10272
4822 218 10283
4822 321 22603
4822 402 61255
4822 460 20767
4822 402 50277
4822 460 20769
4822 460 20772
4822 444 50603
4822 466 92251
4822 410 50169
4822 410 60115
4822 410 60202
4822 410 60118
4822 450 61362
4822 410 60116
4822 505 10571
4822 492 52094
4822 402 61252
4822 532 51756
4822 325 50176
4822 325 50177
4822 528 90638
4822 276 30403
4822 276 30404
4822 444 60568
4822 466 92257
4822 528 90639
4822 402 61207
4822 520 40177
4822 530 80503
4822 402 61253
4822 402 61196
4822 358 10115
4822 492 51902
4822 528 81329
4822 466 61587
4822 402 50276
4822 492 51935
4822 492 32883
4822 691 30209
4822 361 20998
4822 535 92907
only for /04
only for /01/02/05/06
WORDMARK MARANTZ
only for /01/02/04/05
WORDMARK PHILIPS only
for /06
only for /04
only for /01/02/05/06
only for /04
only for /01/02/05/06
only for /04
only for /01/02/05/06
only for /04
only for /06
only for /01/02
only for /05
only for /01/02/04/05
only for /06
only for /04
only for /01/02/05/06
only for /04
only for /01/02/05/06
only for /04
only for /01/02/05/06

4-4
CONTROL+DISPLAY
TION
INVISIBLE LASER RADIATION WHEN
OPEN.OO NOT STARE INTO BEAM
3104 106 75942
4Nx10
<i ~~ HEADPHONE
5 PANEL
eg
256
“
|
Ke
239
||
7
dete
241
-<@
;
'
242
3mx10
VARIABLE
LINE OUT
562
Vi
REMOTE
CONTROL
Fe
TRANSMITTER
Ze
=< —
EVA.00828
T27/912
CS 22 115

5-1 Follow the path of the faultfinding tree beginning at the
top left. Perform the actions you come across in the
If you establish this fault, follow the branch and perform
TROUBLE SHOOTING (FAULT FINDING TREE) various blocks. In a number of branches further reference is made to
Look at the various side branches to find out if the measurements you could carry out.
information you see there applies to your problem. If, for These measurements are explained in several tables
further on in this manual.
instance, you find the indication ~“tsplay.__ this means
that no picture appears on the display.
START-UP PROCEDURE
Dornay CUCK & TRAY Jed ERR oo” SHOCK ~ REMOTE ~ INTERMITTENT
Ay Bhaod Oe
~s POPS INDICATION SENSITIVE CONTROL FAILURE
| POWER POWER POWER POWER
Mt
yes
OFF OFF OFF
OFF
x
‘0
RCS
RECEIVER
Skt 6542 TRAY MECHANISM 6527
FUSE DISPLAY 6543 BELT 6526
TRANSFORMER FUSE DRIVER 6544 TRAY MOTOR 8) \) 8530 (©)
MAINS TRANSFORMER pP SIGNALS 545 TRAY SWITCH Sk2 TRANSPORT SCREWS REMOVED?
VOLTAGE ADAPTER VFTD 6551 Eee EYE PATTERN (HFI)
ae Hae KILL TL
es 653 oRCUT ANGLE DISC-LIGHTPATH
+58 6555 aby
45 6556 Disc
6 6557
68 6558
~10 6559
6568
SERVICE POSTION 0
STOP/CM
}<<SEARCH>>
SEARCH>>
<<SEARCH 3
ARM FRICTION PHOTO DOSES OK. FLEXFOR. Fe
FLEX FOIL : SyaD 6500
80...83 | Lo 6504
RADIAL MOTOR im 3865
FLEXFOL FOCUSMOTOR
LENS
CLEAN?
SEE:
‘ADJUSTMENT
OF FOCUS
OFFSET
ADJUSTMENT
SERVICE POSIT!
SERVICE POSITION 0
STOP/CM
+
PLAY
+
POWER ON PREVENT
*
.
SKATING
ae
SPEED
OF
THE
RADIAL
ARM
SPEED
AFTER:
¥
‘MIQUTE
ZERO
HIGH
TRACK
e
TAAgK
2
t
!
FOLLOWING
FQu
GL
TURNTABLE
MOTOR
MC
ea00)
ve
HF!
6504
iG
X-TAL
(1502)
Fone
6505
6512 6549
OFF
et
REDIG
an
RELAG
pl
RAD+
$
(0)
BO
+83
cosci
cosc2
LOAD
D-9
TEST
DISC
5A
s 0 , wee me Re
“4 DE- ‘SIS DISTORTION LEVEL
mack
3
|
ier
(Je
(Je
DE-EMPASIS
An
oni
i) | 2) | | | | |
OOS WSAB 6535 6536 OEEM 6540 ATS8 HEADPHONE DOBM
QRA CLAB WSBO WSBD 6572 6541 6540 PANEL
act DAAB 6541 6541 6582 6535
QDA DABD 6583 8536
SWAB MUTE 6554 EYE PATTERN (HF)
SCAB MUSB
SDAB 6541
KILL SEE: SPECIFICATION
8542 MEASUREMENT
6544
6545
SERVICE POSITION 0
PLAY —1
STOP/CM
+
+
REPEAT
PLAY SERVICE POSITION 3
+
POWER ON
ERROR INDICATION
ERXX
4 TABI
SEE: ERROR LE MDA.02127
1-27 918
CS 22 116
the recommended actions. Check the signals mentioned.
A-1 uP - SIGNALS
Pulse “high”
ee 2,5 Vde “low” when tray is opening
2,5 Vdc *high” when tray is closing
pulses low in position pause
high” only when a 8 cm disc has
been used.
T-22387A
a
DISC, SEARCH
Play 67
17
8
cm
disc
|
Service position 0 or 1; search >
2 Po
oe
Srmpamiveteeie | al
Smite a
pear an wae eal
(Geeemaba mene. [ar | nae
seommnbeleeas Cer. lee, ot
[awe poutndertewe« |e | [wef
T-22387B
B-3. CHECK OF THE PHOTODIODES
Remarks
See drawing | Signal depends on Distance lens «>
38314A12 IR LED of remote control
MOA.01378
1-08 824
T-22387C
B-4 CHECK OF LASER SUPPLY
The laser, the lasersupply plus the monitor diode form a feedback system.
A defect in the lasersupply may result in the destruction of the laser. If, in that case, the laser is replaced, (= complete
C.D.M.-unit) the new laser will also become defective. However, it is impossible to check and repair a feedback system if
a link is missing. For this reason the laser supply can be checked with the replacement circuit for laser assembly.
° Remarks
PRS05539
PRS05540
T-22387D