Marantz 1530 User manual

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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 wil! continue to perform to the specifications for
which it is famous.
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 com-
puter 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 infor-
mation, 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.
ORDERING PARTS
Phone orders will eliminate mail delays, and we encourage the use of this method. If you order by mail, uue MARANTZ parts
order forms which are available from our National Parts Depot located at the following address:
SUPERSCOPE NATIONAL PARTS DEPARTMENT
20525 Nordhoff Street
Chatsworth, California 91311
Phone: [phone]
1-213-998-9333
The following information must be supplied to eliminate delays in processing your order:
Complete address.
Complete part numbers.
Complete description of parts.
Model number for which part is required (indicate MARANTZ).
Account number (for account customers only).
PUN
Direct consumers will be provided with the current retail price quotation on available parts in order to advise themof the cost
of the parts and shipping.
OVERSEAS PARTS ORDERING
Parts may also be ordered from the following overseas addresses:
CANADA AUSTRALIA JAPAN
Superscope Canada, Ltd. Superscope (Australasia) Pty., Ltd. Marantz Japan, Inc.
3710 Nashua Drive 32 Cross Street (P.O. Box 604) 3622 Kamitsuruma
Mississauga Brookvale 2100 N.S.W. Sagamihara Shi
Ontario, Canada L4V1M5 Australia Kanagawa, Japan
EUROPE
Superscope Europe, S.A. Marantz France Marantz Audio U.K. Ltd. Superscope GmbH
Avenue Leopold III, 2 Rue Louis Armand 9 London Road, 203 Max-Planck-Strasse 22
7120 Peronnes-Lez-Binche 92600 Asnieres Staines D-6072 Dreieich 1
Belgium Hauts-de-Seine Middlesex West Germany
France England
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 ewent that
there is no service location listed for your country, please contact the nearest facility for the necessary assistance.
nRaaem Bean Bal 2.
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TABLE OF CONTENTS
Section Title Page
TOPS BORRDS: 5 cc ohne eee e aca aonleted: ia: Se ae Wg HO Bod oo, ras wah "ws ee de ae Bh a a IG hte AG owt at aes See ods aes 1
2. TEST EQUIPMENT REQUIRED FOR SERVICING ... 0... ce ee ee ee ee ee eee eens 2
3. ALIGNMENT: PROGEDURES 5 yess o5n eh ee er a a be ee ek oe Ea eRe be eee ee ee ee eee 3
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3:3. AM Alignment Procedures: < 365-3 3455-5 Wa ow we RAE ek & ee ee ew CLASS ee 4
34 Audio Alignment Procedures «0:04.65 004645405 ae cbs ee ee Oa od ee we ae eee ee we we ee me ee ee F 5
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5.2 Tuner Board Schematic Diagram and Component Locations-P100... 2... 20... .. eee ee te we ees 8
5.3 Phono Amp Board Schematic Diagram and Component Locations-P400 1... 2.0.2... 0. ce ee ee ee te 10
5.4 Main Amp & Power Supply Board Schematic Diagram and Component Locations-P700 ........... 0.2.0 cu eee ew ee 11
5.5 Antenna Input Board Schematic Diagram and Component Locations-PCOO......... 0.0... ee ee ee ee eee 12
5.6 Tone Amp Board Schematic Diagram and Component Locations-PEO0 ........... 2... cee wee ee eee te ee te eee 12
5.7 Power Transistor Board Schematic Diagram and Component Locations-PNOP .. 2.2... 0.0... eee ee ee we es 12
5.8 Filter & Switch Board Schematic Diagram and Component Locations-PSOO0 ........ 20.0... eee eee ee ee es 13
5.9 LED Board Schematic Diagram and Component Locations-PY01 1.1... . 0... ce cee ee ee ee ee ee ees 13
B. EXPLODED VIEWS: AND-PARTS LIST soc jic vista i ale 2 we Sr Se WEES we el Se es HE Re a ee 14
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6.4 [P01-99] Front Chassis and General Parts 2... 2... cee ee ee ee ee ee ee ee ee ene ne es 17
6.5 [P02-99] Assembled P.W. Boards and Other Parts... 1... ee ee ee eee ee ee ee eee es 18
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MODEL 1530/MR230/MR235 STEREOPHONIC RECEIVER
INTRODUCTION
This service manual was prepared for use by Authorized
Warranty Stations and contains service information for
Marantz Model 1530/MR230/MR235 Stereophonic
Receiver.
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 receiver.
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 usually be
obtained through local suppliers.
Figure 1. Dial Stringing
am, fm Soave receiver
‘ SYSTEM. Ft
SPEAKERS
1. P.W. BOARDS
As can be seen from the circuit diagram, the chassis of
Model 1530/MR230/MR235 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.
Te. TUONO 02a ea Sasi oe k s mounted on P.W. Board P100
2. Phono Amp........ mounted on P.W. Board P400
3. Main Amp &
Power Supply .:.... mounted on P.W. Board P700
4. Antenna lnput...... mounted on P.W. Board PCOO
5. Tone Amp......... mounted on P.W. Board PEOO
6. Power Transistor mounted on P.W. Board PNO1
D2 PUSEs woe eck iat hib ace eee mounted on P.W. Board PPO1
8. Filter & Switch ..... mounted on P.W. Board PSOO
BE De. gek aveck: Gein Spe mounted on P.W. Board PYO1

2. TEST EQUIPMENT REQUIRED FOR SERVICING
This table lists the test equipment required for servicing the Model 1530/MR230/MR235 Receiver.
Manufacturer and Model No.
Sound Technology
Model 1000A
AM Signal Generator Signal source for AM alignment
Test Loop
Use with AM Signal Generator
Signal source for FM alignment
Stereo separation alignment and trouble
shooting
FM Signal Generator
MPX Signal Generator
nuns TaehAbla Distortion measurements
Mode! 1700A sv Sinewave and squarewave signal source
Voltage measurements (AC)
Tektronix Model T932 Waveform analysis and trouble shooting and
Philips Model 3232 ASO alignment
Fluke Model 1900A MPX Oscillator adjustment (VCO)
Trouble shooting
Voltage measurements (DC) |
Monitors primary power to amplifier
Monitors amplifier output under short circuit
condition
Distortion Analyzer
Audio Oscillator
AC VTVM
Oscilloscope
Frequency Counter
Circuit Tester
Fluke Model 8000 “Digital” Simpson
Model 313, Triplet Model 801
Simpson Model 1379
DC VTVM
AC Wattmeter
AC Ammeter Commercial Grade (1-10A)
Monitors potential of primary power to
amplifier
Line Voltmeter Simpson Model 1359
Superior Electronic Co.,
Powerstat Model 116B—10A
Sharad
Plu
Use
phono
plug
with
600-ohm
Shorts
amplifier
input
to
eliminate
noise
g
rug
across center
pin
and
shell
pickup
Output
Load
(8
ohms,
.
Provides
8-ohm
load
for
amplifier
output
+0.5%,
100W)
eommerctalsatads
termination
Output
Load
(4
ohms,
wae
Provides
4-ohm
load
for
amplifier
output
Variable
Autotransformer
Adjusts
level
of
primary
power
to
amplifier
FTZ REGULATION
instruction for the use in the range other than specified in FTZ codes.
Achtung fiir die Leute, die in dem Gebiet wohnen, wo die FT Z-Bestimmungen vorherrschend sind.
Sollte das Gerat auch fir Frequenzen auszerhalb des in den FTZ-Bestimmungen angegebenen Bereiches empfangebereat sein,
bitten wir, den Bereich durch Nachstellen des Kernes in der Oszillatorspule (in der Abbildung mit “FTZ"’ gekennzeichmet) so
zu korrigieren, dass er den Bestimmungen entspricht.

3. ALIGNMENT PROCEDURES
* A dummy resistor of 47 kohms must be connected across the tape output terminals before alignment.
3.1 FM ALIGNMENT PROCEDURES
(Selector switch in the ‘“FM” position)
Signal Source
Connection
Sweep generator to
point (B) through
5pF capacitor
RF generator to
FM antenna
terminals (@) through
matching network
(300 ohms, balanced}
Maintain RF level
below limit.)
Signal Indicator Set Dial
Frequency Connection Pointer to:
FM IF ALIGNMENT
Oscilloscope to L104 for maximum and
10.7 MHz : 2:
ont © symmetric response.
market at e Quiet point on x F:
10.6, 10.7 and band.
10.8 MHz L201 for straight and
i t 4 aa of
te a ° symmetric “S” curve
P response,
Repeat steps 1 and 2.
FM RF ALIGNMENT
87.4 MHz with L103 for maximum
tuning gang closed. output.
109 MHz with C119 for maximum
VTVMtoLorR tuning gang open. output.
channel output
(W002) L101, L102 for
90 MHz maximum output.
100 MHz
Ant. RF trimmer for
106
MHz
106
MHz
maximum
output.
Repeat steps 1 to 4.
Check overall response curve and repeat above steps as necessary to obtain maximum sensitivity.
No connection
RF generator 1 mV
output to FM antenna
terminals (A) through
matching network
(300 ohms, balanced)
RF generator 12.5uV
output to FM antenna
terminals (A) through
matching network
(300 ohms, balanced)
L201 primary core
No signal DC VTVM {bottom) for ‘‘0’’ voltage
1-voit range to ©) ‘
| reading.
L201 secondary core
(upper) for minimum
distortion.
Distortion meter to
R232 so that signal
strength meter M00 1
may read 85%.
MUTING CIRCUIT ALIGNMENT
R233 for 12.5uV
VTVMtoRorL threshold level. (During
channel output 98 MHz the adjustment turn
(W002) the muting pushswitch
“ON”),

3.2 MULTIPLEX ALIGNMENT PROCEDURES
(Selector switch in the “FM” position)
Signa! Source Signal
Connection Frequency
No
RF generator to FM modulation
antenna terminals
through matching
network (300 ohms,
balanced), with 1mV
FM stereo simulator
RE level and 100%
modulation (pilot 9%)
Stereo, left
(1,000 Hz)
Stereo, right
(1,000 Hz)
3.3 AM ALIGNMENT PROCEDURES
(Selector switch in the ““AM”’ position)
Signal Source Signal
Connection Frequency
Set Dial
Pointer to:
Indicator
Connection
R326 so that frequency
counter may precisely
read 19 kHz.
Frequency counter
to point (E) (J140)
VTVM to right
channel output
(W002, White)
R316 for maximum
output and same
separation in both
channels.
VTVM to left
channel output
terminal (H) (J123)
(W002, Red)
Repeat steps 2 and 3.
Set Dial
Pointer to:
Indicator
Connection
No connection No signal
Sweep generator to 455 kHz
point (F) marker
515 kHz
1,650 kHz
RF generator to
AM antenna terminals
through IHF dummy
600 kHz
1,400 kHz
AM IF ALIGNMENT
R228 to that signal
strength meter MOOt
may read 0.
L154 for maximum
and symmetric
response.
Oscilloscope to Quiet point on
point G) (J141) band.
AM RF ALIGNMENT
L153 for maximum
output.
515 kHz with
tuning gang closed.
1,650 kHz with
tuning gang open.
OSC, trimmer for
maximum output.
VTVM to Lor
R channel output
(W002)
LOO1 for maximum
output.
600 kHz
Ant. trimmer for
1,400
kHz
maximum
output.
Repeat steps 1 to 4 as necessary to obtain maximum sensitivity.

3.4 AUDIO ALIGNMENT PROCEDURES
(Selector switch in the ““AUX”’ position)
|
Signal
Source
Wait 2 min. after power has been on.
Adjust R717 and R718 until distortion
for 0.25W output is minimum,
CAUTION: After adjustment, discon-
nect input signal, and
make certain that current
flowing from R741 to
R744 is 10 to 30 mA.
Distortion meter
used
AF oscillator
to AUX jack
Distortion meter to SPK OUT
terminals with 42 load.
DC voltmeter in 100 mV or
50 mV range to R741 (R743)
and R742 (R744).
Adjust R717 and R718 until current is
Voltmeter
used
10mA
4, VOLTAGE CONVERSION
The Model 1530/MR230/MR235 is equipped with a uni-
versal power transformer that may be adjusted to operate
at 110 V, 120 V, 220 V, or 240 V AC at 50 to 60 Hz. To
convert the unit to a different power source voltage, reposi-
tion conversion plug at shown in Figure 2.
CAUTION: DISCONNECT POWER SUPPLY CORD
FROM AC OUTLET BEFORE CONVERT-
ING VOLTAGE.
ef & @®
For 110V Operation For 120V Operation For 220V Operation For 240V Operation
Figure 2. Voltage Conversion Chart

5. DIAGRAMS
5.1 BLOCK DIAGRAM
O——"*} | HEADPHONES
SPEAKER
SYSTEM 1
‘
O
SPEAKER
SWITCH
SPEAKER
SYSTEM 2
G
| BALUN COIL
FM
| FM RF AMP FM IF AMP LEVEL AMP
FM
|
ees
P|
| MPX STEREO , LOW PASS
| = FM MIXER FM DETECTOR See oper MUTING CIRCUIT SEES
FM
| MUTING
Me LEVEL
ADJ
FERRITE-ROD
ANTENNA
eee
oy,
FM LOCAL OSC | 52)
FM AGC AMP MUTING TRIGGER
AM
RF
AMP
AM
IF
AMP
AMP
i
AM
MIXER
:
AM
DETECTOR
|
ee ae paneer
. SIGNAL STRENGTH TUNING METER
METER
Se aiGnis AM LOCAL OSC
PHONO (©
ee
SELECTOR
aan
VOLUME
BALANCE
=
PRE
&
TONE
AMP
MAIN
AMP
a noeer MONITOR MODE CONTROL CONTROL
aux
©
Se,
SWITCH
SWITCH
Pa
|
rae
|
o, oy, FILTER ©,
wy ; vy NETWORK YS
MIXING
RESISTOR
LOUDNESS
CONTROL S 2 Ss
TAPE2 (A NETWORK b z g 62)
IN OS
BASS = MID TREBLE HIFILTER
TAPE 1 FROM OTHER CONTROL CONTROL CONTROL SWITCH
MoniToR(O}
CHANNEL
|
ues LOUDNESS
SWITCH
TAPE 2
our ©
TAPE 1
MONITOR (O}
IN

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5.2 TUNER BOARD SCHEMATIC DIAGRAM AND COMPONENT LOCATIONS - P100
AM IF 7.P, 19 kel. P.
Jia () 3140 R321 _— ux
100 =x ints
i oh Q102 FM IE vee benae R301 C50! WN BK . EGE FE C307 R319
TUNE! Q1ol C106 (8) io.5y ---b104_ R220 47 = 47K Ys 35) [tas 2s | Q301 fVesy JOO Aas
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8
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F202 F203 m| 2 logy. | O
FM ANT. fk 16 R320
Oo (Vy 100
Jor LIOl UN FM
O—>yf, rare x SEPARTION
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FM
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