Marantz SD340 User manual

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model $0340

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 telex. In both cases, MARANTZ part number has to be specified. If you order by
mail, fulfil MARANTZ order forms.
MARANTZ S.A. SUPERSCOPE NATIONAL PARTS DEPARTMENT
EUROPEAN PARTS DEPARTMENT 20525 Nordhoff Street
2, Avenue Léopold III Chatsworth, California 91311
B-7120 PERONNES-lez-BINCHE Phone: [phone]
BELGIUM Phone: [phone]
TWX: 57589 SEPLT B
The following information must be supplied to eliminate delays in processing your order:
Complete address
Complete part numbers and quantities required
Description of parts
Model number for which part is required
Way of shipment
Signature: any order form or telex must be signed otherwise such part order will be considered as null and void.
OX OV oS
PARTS ORDERING:
Parts may be ordered from the following addresses:
EUROPE
MARANTZ S.A. MARANTZ DENMARK MARANTZ BELGIUM MARANTZ NEDERLAND 8.V, MARANTZ AUSTRIA Ge.M.8.H.
European Parts Department Bregnergdvej 132b 45 Rue Auguste Van Zande Wagenmakersweg 3 25 Franz Lisztgasse
2, Avenue Léopold III 3460 Birkergd 1080 Brussels 3449 HV Woerden 2380 Perchtoldsdorf
B-7120 Péronnes-lez-Binche Denmark Belgium Netherlands Austria
Belgium
Telex:
39137
Telex:
113583
Telex: 57589
MARANTZ
S.A.
MARANTZ
FRANCE
MARANTZ
SVENSKA
A.B.
MARANTZITALIANA
S.p.A.
MARANTZ
GERMANY
G.M.B.H.
326 Avenue Louise Bte32 4 Rue Bernard Palissy Svartviksvagen 56 Via Monte Napoleone, 10 Max-Pianckstrasse 22
1050 Bruxelles 92600 Asniéres Traneberg Bromma 20121 Milano 6072 Dreieich 1
Belgium France Sweden Italia Germany
Telex: 26602 Telex: 611651 Telex: 13449 Telex: 4185316
MARANTZ AUDIO U.K. LTD.
Unit 15/16
Saxon Way Industrial Estate AUSTRALIA U.S.A. JAPAN
Moor Lane MARANTZ AUSTRALIA PTY.,, LTD. MARANTZ COMPANY, INC. MARANTZ JAPAN, INC.
Harmondsworth UB7 OLW 19 Chard Road Nationai Service Dept 35-1, 7-chome, Sagamiono
Great Britain Brookvale, NSW 2100 P.O. Box 577 Sagamihara-shi, Kanagawa
Telex: 935196 Australia Chatsworth, CA 91311 Japan
Telex: 24121 US.A Telex: 22878
Telex: 4720284
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
assistance.
In case of difficulties, do not hesitate to contact the Technical
Department at abovementioned address.
NOTE-—FOR U.S.A. ONLY
Parts for your MARANTZ stereo are generally available within 72 hours throughout the nation via a toll-free line to our
National Parts Depot in California. The sales professionals who take your call immediately refer to their own desk top
computer terminal and can quickly determine the availability and price information you require. If, for some reason, your
order should exceed our available stock, we usually can instantly provide an alternate replacement part or current delivery
information. When the order is placed and confirmed, the computer simultaneously generates “hard copy” orders at the
distribution center. As hard copies come directly from the computer to the national parts depot, your requested stock is
assembled and prepared for shipment and placed on the first available carrier for delivery to you.
Phone orders will eliminate mail delays, and we encourage the use of this method. If you order by mail, use MARANTZ
Parts order forms which are available from SUPERSCOPE NATIONAL PARTS DEPARTMENT.
ERR eR Bek BRE ZZ’
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TABLE OF CONTENTS
SECTION PAGE
INTRODUCTION. sessed see we to oak ese Ne SS ee ee ee Wa hae eae 1
1. SHOCK, FIRE HAZARD SERVICE TEST: ..... 2. ee eee 1
2: (PWBOARDS 2.6603 seeded See ES ee ee ee Se die ees ee eh rae ts eee 1
3. TEST EQUIPMENT REQUIRED FOR SERVICING .............. 00.0 e eee eee eee 1
4:. (DESCRIPTIONS 15 cod Sc iciinc 8G Oe phelah ec Maraita hoard WA aca ere a Ee Ee eee gee eS 2
4.1 FORWARD/REVERSE Mechanism Switching .......... 20 0c eee ee ee eee eee eee ee eee 2
4.2 Playback Equalizer Amplifier 2... 0.00. ccc ee ee ee eee eee eee 3
4.3
Dual
Pre-Amp
for
Auto
Reversw
TA7405P
(QJ25)
2.0...
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3
4.4 Operation of Playback Equalizer .. 2.2. 2... oe ee eee ee nee 4
4.5
Equalizer
Switching
.....
20.0.0...
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tees
4
4.6 Forward/Reverse Playback Level Adjustment... .......-. 0.2 eee eee ee ee eee eee ee eee 4
5.. ELECTRICGAL-ADJWSTMENTS ess ceehtves Soibbck Baiaren Son ee Mk ae ad ee ed ote 5
5.1 Precautions for Adjustment and Measurement .......-. 000 eee ee eee ee eee ee 5
5.2
Head
Azimuth
Adjustment...
1...
2...
2
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5
5.3
Tape
Speed
Adjustment...
2.2.2.0...
0c
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6
5.4 Playback Equalizer Measurement... 0.2.00... ccc ee eee ee ee ee eee tte ee eee eee 6
5.5 Playback Output Adjustment ... 2... 6. ce ee ee eee eee eee eee 6
5.6
Peak
Level
Meter
Measurement
......-.-
02.
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6
5.7 MPX Filter Adjustment ... 2.0.0.0 0 cee ee eee eee eee eee ete ee 6
5.8
Record-Playback
Level
Adjustment
.........
00.
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5.9
Recording/Playback
Frequency
Response
Adjustment...
..
2.0...
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6:
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6.1
Removing
the
Top
Cover
..
1.2...
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6.2
Removing
the
Front
Panel
..
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6.3
Removing
the
Front
Chassis
0.0...
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6.4
Removing
the
Main
P.W.
Board
.........
2.0.
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6.5
Removing
the
Mechanism...
2.2...
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7. BLOCK/LEVEL DIAGRAMS — 2... ce eee ee een eee enn ne tnie 9
8. VOLTAGE CONVERSION oo. ccc cc ee ee ee een ee re ene eens 10
9. TECHNICAL SPECIFICATIONS .... 1... en ee eee ees 11
10. WIRING DIAGRAMS § .... 1. ee eee ee ee eee 12
11. EXPLODED VIEW AND PARTS LIST .......... 2... eee ee eee eee ees 14
12. ELECTRICAL PARTS LIST .. ww... cc cc cc ee nee ee eee nee ete ee eens 21
13. SCHEMATIC DIAGRAM ... 2.1... ee eee eee eee ee eens 26

MARANTZ MODEL SD340 STEREO CASSETTE DECK
AUTO REVERSE SYSTEM
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INTRODUCTION
This service manual are prepared for use by Authorized
Warranty Station and contains service information for
Marantz Model SD340 Stereo Cassette Deck.
Servicing information and voltage data included in this
manual are intended for use by the knowledgeable and
experienced technician only. All instructions should be read
carefully. No attempt should be made to proceed without a
good understanding of the operation of the Cassette Deck.
The parts list furnishes information by which replacement
parts may be ordered from the Marantz Company. A simple
description is included for parts which can be usually
obtained through local suppliers.
1. 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 1 Megohms should
cause unit to be repaired or corrected before AC power is
applied, and verified before return to user/customer.
Ref. UL Standard No. 1270. Para. 66. 3. D (Mandatory
Test after servicing Electrical Appliances, effective 7-1-88).
2. P.W. BOARDS
As can be seen from the circuit diagram, the chassis of your
Cassette Deck consists of the following units. Each unit
mounted on a printed circuit board is described within the
square enclosed by a bold dotted line on the circuit diagram
R/P MainAmp. ..... mounted on P.W. Board PJ0O1
1.
2. BiasOSC.......... mounted on P.W. Board PLO1
3. Tape Selector/
Dolby NR Switch .. . .mounted on P.W. Board PU01
4. Direction Switch . .mounted on P.W. Board PUO2
5. L.&.D Meter/Rec
Volume .......... mounted on P.W. Board PX01
6. Dolby NR/B-C...... mounted on P.W. Board P600
7. Power Switch....... mounted on P.W. Board P800

3. TEST EQUIPMENT REQUIRED FOR
SERVICING
For measuring or checking your Cassette Deck, the follow-
ing instruments and materials are necessary.
VTVM
4.
DESCRIPTIONS
This auto reverse stereo cassette deck is capable of single
direction recording and reverse playback. Four channel
heads (fixed type) are mounted in the unit.
e
@
Audio
Oscillator
(AF
OSC)
4.1
FORWARD/REVERSE
Mechanism
Switching
.
ee
a.
Auto
Reverse
switching
at
the
end
of
the
tape:
©
Bandpass
Filter
(1
kHz)
When
the
tape
reaches
the
end,
the
direction
switch
©
IEC
A-Curve
Filter
(S072)
is
switched
to
the
ON
position
by
the
action
@
Woavrsnd
Blutiec
Mott
of
the
mechanism.
Voltage
of
—12V
is
applied
to
@
Torque
Meter
(Cassette
Type)
the
solenoid
(L071)
and
it
attracts
its
counterpart.
w: Digital Erequéney: Counter This moves the mechanism into the run direction.
®@
Distortion
Meter
b.
Forward/Reverse
switching
by
the
direction
switch
@
Blank
Tapes
(Completely
erased
with
bulk
eraser)
QU24
is
switched
to
the
ON
position
by
the
opera-
TDK
AC-212
(Normal)
tion
of
direction
switch
SY01,
SYO2.
Voltage
of
TDK
AC-512
(Special/CrO2z)
—12V
is
applied
to
the
solenoid
(LO71)
and
it
TDK
AC-711
(Metal)
attracts
its
counterpart.
This
moves
the
mechanism
into the run direction.
Note:
If
any
doubt
is
noted
in
a
measured
value,
use
new
c.
Depending
upon
constants
of
RU33
and
CU25,
tape. QU24 will only come on when CU25 is charged,
even if SYO1 and SYO2 are kept depressed. The ON
time of QU24 can be changed, changing attraction
©
Test
Tapes
(New
Tape)
time
of
the
solenoid,
by
varying
the
constants
of
MTT-111 Wow and Flutter, Tape Speed ; RU33 and CU25.
MTT-212 Measurements of Output Level Signal-
to-Noise
Ratio
d.
If
the
REC OFF
is
off
in
the
record
mode
in
the
MTT-150
Adjustment
of
Play
Back
Level
cases,
voltage
will
not
be
applied
to
the
solenoid
coil
MTT-216
Frequency
Response
(for
Normal)
(L071)
and
thus,
switching
operations
will!
not
be
MTT-316 Frequency Response (for Special/CrO2 possible.
and Metal) e. When the mechanism is the record mode, switching
MTT-121 Cross Talk into the reverse direction does not occur at the end
MTT-141 Channel Separation of the tape.
(13.20) —= PLAY, REC {OV}
pu2 40/0744 Ss é) an Qu24
ean eee oe,
ls ce a ar RU33_ 220k wis
wo7l
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RU35 680
10.70V) — PLAY /0V}
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RUIE_jyy 680
REV PAUSE
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