Marantz PM243 User manual

9

Using superior design and selected high grade
components, MARANTZ company has created the
MARANTZ DESIGN AND SERVICE
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, correct part number has to be specified. If bis
TECHNICAL ASSISTANCE | |
Should you require any other technical support, do not
MARANTZ EUROPE & Co.
order by mail, fulfil MARANTZ order forms.
The following information must be supplied to eliminate
delays in processing your order:
. Complete address
« Jeu iption Wi pars
. Way of shipment .
MO OF & Gd PN —
: Complete part numbers and quanties required
Th me oe oyers rm > on mF naris
. Model number: for which part is required
. Signature: any order form or telex must be signed.
_ otherwise such part order wil be considered: as null.
and. mee
PARTS ORDERING
__. Parts may be ordered at.the following addresses:
AUSTRIA.
HORNYPHON
' . Vertriebsgeselischaft GmbH
Wienerbergstrasse 1
‘ A1101 Wien
Austria,
Telex: 132.332.
EIRE
MARANTZ: IRELAND Ltd.
Newstead ©
Glonkeagh
Dublin 4
Telex: 25200
: FINLAND |
- AUSTRALIA -
MARANTZ AUSTRALIA -
PTY., itd.
. 19 Chard Road |
Brookvale, NSW 2100
Australia’
Telex: 24121
BELGIUM
SVD DIVISION MARANTZ
‘ Industrialaan 1
1720 Groot-Biigaardan
Belgium.
Telex: 24466
CHILE
MARANTZ i
~ DIVISION OF PHILIPS S.A.:
AV. Santa Maria, 0760
Casilla 2687
Santiago
Telex: 240.239
DENMARK
MARANTZ es
DIVISION OF PHILIPS
SERVICE A/S
. Prags Boulevard 80
Postbox 1919
DK-2300 Ke@benhavn S
Denmark
Telex: 31201
~ Telex: 529821
MARANTZ
DIVISION OF OY PHILIPS Ab
Kaivokatu8 ;
00100 Helsinki
Finland ©
Telex: 124811
FRANCE |
MARANTZ FRANCE .
4 Rue Bernard Palissy
92600 Asniéres
Franca
Telex: 611651
GERMANY —
MARANTZ GERMANY GmbH
Max-Planck-Strasse 22 _-
6072 Dreieich 1
Germany
THE NETHERLANDS
MARANTZ
De Limiet 3 .
4131 NR Vianen.
The Netherlands
Telex: 47679
t
-NORWAY ss
-. MARANTZ us “ <
DIVISION: OF PHILIPS AIS it,
Sandstuveien 40 i oa
"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 sw
ADAMCO S.A.
P.O.Box 21025
_ Hippocratus Street 188
Athens 71410 — a
. Greece
Telex: 216. 795.
- MARANT TZ ITALIANA S.p.A..
Via Monte Napoleone 10
20121 Milano
Italia -
JAPAN
MARANTZ JAPAN, Inc..
- 35-1, 7-chome, Sagamiono .
_ Sagamihara-shi, Kanagawa —
Japan.
~-—1-Telephone: [phone]-(1011)-—
| Telex: 26602
Ignacio iglesias 10
Avenue Louise 326 - Bte. 32
B-1050 Brussels
Belgium
hesitate to contact the Technical Department of
Fax.: [phone]
KUWAIT
* “AL.ALAMIAH ELECTRONICS
. Ussama, ‘Building : .
._. Fahd al Saleem Street
~ P.O.Box 23781.
. Safat-Kuwait
Telex: 22694 -
- SAUDIARABIA: it«s
"AL ALAMIAH ELECTRONICS —
P.O.Box 5954:
University Street
Riyadh 11432 _
Saudi Arabia »
. Telex: 201530
SOUTH
AFRICA
-MARANTZ
°
7
DIVISION
OF
PHILIPS
SA
Rainer House
Ove Street, 10
Doornfontein —
_ Johannesburg. —
_ Telex: 483.456
SPAIN
PHONO S.A.
Badalona eareerons)
~ Spain |
| ‘Telex: §9355 —
SWEDEN ©
MARANTZ
_ DIVISION GF PHILIPS
Férsaljning AB
_~ Tegeluddsvagen 1
~§-115 84 Stockholm a
Sweden. iz,” % SP
Telex: 14060
SWITZERLAND
_ DYNAVOX- ELECTRONICS
' Route de Villars 105
- 1701 Fribourg -
. Switzerland. — -
Telex: 942377
TURKEY.
~ DOGRUOL Ltd.
1LM.C.
6 Blok N°6310°
Unkapani -
Istanbul | ~
Turkey
7 Telex: 22085
_ MALTA.
CACHIA & GALEA -
Republic Street, 68D
_. Valetta
| Telex: 1682 -
' U.S.A.
MARANTZ COMPANY, inc.
National Service. Department:
. _ P.O.Box 877 |
weg Usa. CA 91317 ©
“og
All
of
the
above
locations
:
are
fully
equipped
to
take
care
2
of
your
total
service
needs.
Because
various
countries
ave
-
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
yout
country,
please,.
contact
the
nearest
facility
for
the
necessary
7 assistance.
M 199
In case of difficulties, do not Reeneie to. contact the Technical
Department at abovementioned address.
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‘TABLE OF CONTENTS
SECTION : PAGE
INTRODUCTION.............cceceeeeees. ee ee Te ee ead eee ee ee ee 1
APM RORAOS con cins sasuke n eeenanedaurueie canta tenance eaeees need 1
2. FUNCTION OF EACH PART ... 1... ccc eee eee teen anne eenes wee eeees 1
3, TEST EQUIPMENT REQUIRED FOR SERVICING .............. ee ee
4. uPC1270H (0701, 0792) POWER AMPLIFIER DRIVE ..........0..0cccceceeeeeeeeeeeee: baie 2
5. NJM7815 (0801) — 3 TERMINAL CONSTANT-VOLTAGE REGULATED POWER SUPPLY . eee 4
6. VOLTAGE CONVERSION ........... t chabeace eas seebas Saya Stenicosaeetia ane ee 5
7. BLOCK DIAGRAM ............0.0000 socieatin saa tonee iene sae bereits ee er 6
8. SCHEMATIC DIAGRAM AND COMPONENT LOCATIONS ...........-..-.0-00-- sta daneeaee 7
8.1 Main Amp Assembly (P700) Schematic Diagram and Component Locations .........0.0ceceneoes 7
8.2 Indicator Assembly (PS00) Schematic. Diagram and Component Locations Sein’ fies crate acutaieg 2 a eae 7
8.3 6P Connector Assembly (PV50) Schematic Diagram and Component Locations i : . bu ise argue an Ante aselaie 8
8.4 16P Connector Assembly (PV00) Schematic Diagram and Component Locations : sa eres eee 8
8.5 Power Switch Assembly (PGOO) Schematic Diagram and Component Locations . cei etie Ad teases creas 8
9. EXPLODED VIEW AND PARTS LIST 6:22.34 ee ee ee re ee nuit een enetee eae nies 9
10. ELECTRICAL PARTS LIST ...-....0ce0ceicnececccccccceecencneeaeenteccenecuceeenes 12
11. TECHNICAL SPECIFICATIONS...........20cscceccececceeeecseceeseuseesseeeeeaeenes 15
12.. SCHEMATIC DIAGRAM ici. o co iSite Veo eee te a ie ee ee Nea ae ee 16
Marge

MODEL PM243/143 STEREO PRE MAIN AMPLIFIER
: #¥
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SILRES ame ER
SMODEL #263
INTRODUCTION
This service manual was prepared for use by Authorized
Warranty
Stations
and
contains
service
information
for
the Marantz Model PM243/143 Stereo Pre Main Amplifier.
Servicing information and voltage data included in this
manual are intended for use by knowledgeable and ex-
perienced personnel only. All instructions should be read
carefully. No attempt should be made to proceed without
a good understanding of circuitry operation.
The parts list furnishes complete ordering information.
Most replacement parts should be ordered from the
Marantz Company. However, a simple description is in-
cluded for parts which can be obtained locally.
2. FUNCTION OF EACH PART:
(1)
TREBLE/BASS/MIDDLE
SWITCH
By
using
the
loudness
circuit
and
setting
the
tap
position
on
sch
VR
to
70%,
100
Hz
and
10
kHz
are
boosted.
A
TR
1. P.W. BOARDS|
As can be seen from the circuit diagram the chassis of
Model PM243/143 consists of the following units. Each
unit mounted on a printed circuit board is discribed within
the square enclosed by a bold dotted line on the circuit
diagram. :
4. Main Amp ......... mounted on P.W. Board P700
2. Power Switch....... mounted on P.W. Board PGOO
3. Indicator.......... mounted on P.W. Board PSOO
4. 16P Connector ...... mounted on P.W. Board PVQOO
5. 6P Connector....... mounted on P.W. Board PV50
impedance
element
is
inserted
in
the
NF
lines
of
the
main
arenes
to
achieve
boosting
of
the
middle
range.
|
100 Hz +6 dB, 1 kHz +4 dB, 10 kHz +3 dB.
(2) POWER AMPLIFIER
_For voltage amplifier, monolithic IC uPC1270H | covering as far as the driving step is used; and for. the final step,
a
discrete
transistor
ts
used,
making
up
the
power
amplifier.
No
idling
adjustment
is
required;
if it is
needed
according
to
varistor diode’
s
rank,
it is
done
by
changing
the serial
resistance.
The
0
rank is
used for
this
unit.
(3) MUTING/LIMITER
Muting
is
enabled
when
the
power
is
turned
ON/OFF
by
controlling
the
voltage
at
pin
2
of
uPC1270H
(the
+
side
sf
the
front
step)
with
OQNO1
—
OQNO3.
An
abnormal
voltage
caused
by
short-circuiting
of
the
speaker
system,
etc.,
detected
by
QNO6
and
ONO7
so
that
the
above
muting
circuit
is
driven
by
QNOS
and
ON10.
N aaqt

3. TEST EQUIPMENT REQUIRED FOR SERVICING
This
table
lists
the
test
equipment
required
for
servicing
the
Model
PM243/
143
Stereo
Pre
Main
Amplifier.
a)
Voltage
measurements
(AC)
_ | |
ACVTVM
—
Oscilloscone
—
Waveform
analysis
and
trouble
shooting
and
ASO
alignment
=
Trouble
shooting
| |
.
| |
DC
VTVM
a
|
4
Voltage
measurements
(DC)
Circuit Tester
Variable
Autotransformer
(0
~
140V
AC,
10A)
Adjust
level
of
primery
power
to
amplifier
|
Shorting
Plug
Shorts
amplifier
input
to
eliminate
noise
pickup
4.
yPC1270H
(0701,
0792)
POWER
AMPLIFIER
DRIVE
| | | te
uPC1270H is a semiconductor integrated circuit developed Pin Connections
for driving stereo Hi-Fi power amplifier.
The
internal
circuits
consist
of
a
voltage
amplifying
circuit,
T
pinno.
|
Connection
pre-drive
circuit,
drive
circuit,
and
protection
circuit.
It
has
wai
+Vcep
(Pre
Driver
Regulator)
.
an external shape of a 12-pin smiall-size single in-line
package.
eel
+Vccp
(Pre
Driver
Regulator)
| 3s MUTING
| INPUT ~
Fg
—Veccp
(Pre
Driver
Regulator)
[|
10
—Vccd
(Drive
Regulator)
LOWER OUTPUT
UPPER OUTPUT
:
+
cop
.
+V
cep
MUTING
(FORWARD)
(ORIVER}
12
NO INVERTING
{POWER DRIVER)
INPUT Differentiat Protection
INVERTING Amplifier Circuit
INPUT
OUTPUT
2
(POWER DRIVER)
—Vecp FREQUENCY COMPESATION (BIAS }. ~V cep
Wecnecros (DRIVER }
Mae
_—

Maximum Ratings (Ta = 25°C)
ae
Characteristics
,
;
No-Operating
Supply
Current
Storage
Temperature
_
A
O~
+160
—*Ta=75°C
100mm x 106mm x imm
Alminium Heat Sink
Closed Loop Voltage Gain | |
E
ji
Output
Offset
|
|
Voltage
No-Operating
Supply
Current
Maximum
Output
Voltage
3
Open
Loop
Voltage
Gain
|
~
Output
Noise
Voltage
an
|
Band
Width
PBW.
|
atio
Mute
ON
Output
Vv
|
Offset
Voitage
_
OFF
(MUTE)
i ri
a8 *h
Operating Supply Current | Vecp +45 |
me

we
— Maaqe
5. NJM7815 (0801) — 3- TERMINAL CONSTANT-VOLTAGE REGULATED POWER SUPPLY
NJM7815 is a regulator IC with 3 positive output terminals, integrating series regulator circuits on 1 chip.
PIN LOCATION.
|. OUTPUT
2. GND
3. INPUT
Maximum Rating
Characteristics fi
Input Voltage
i
1
}
i
Storage Temperature
Operating Temperature
Temperature Characteristics
| Junction-Circumference. | 0 ja 70 :
Temperature Resistance ey CAN
Junction-Case 6G j
Electric Caracteristics
Vo | V
Output Voltage Vin = 23V, Io = 0.54 14.4 15.6
Reactove Current — la | Vin = 23V, lo = OMA — 6.0 | mA
Load Reguration AVo—lo Vin =.23V, Io = 0.05~ 1.54
Line Reguration | AVo — Vin Vin = 17.5 ~ 30V, Io = 0.5A
Ripple Rejection Ratio | RR. | Vin = 23V, ein = 2Vp-p: f = 120Hz
Noise Voltage Vu My = 23V, 19 = 0.5A
Vin = 23V, Io = 5mA
Output Voltage

6. VOLTAGE CONVERSION
@e EUROPEAN MODEL ONLY
To convert the unit to a different power source voltage, .
change the position as illustrated in the drawing below.
CAUTION 7 |
DISCONNECT POWER SUPPLY CORD FROM A
OUTLET BEFORE CONVERTING VOLTAGE.
Voltage Conversion Chart
- VOLTAGE
SELECTOR
| Note on safety: Symbol A Fire 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 of fire or electrical shock hazard.

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SCHEMATIC
DIAGRAM
AND
COMPONENT
LOCATIONS
8.
8.1
Main
Amp
Assembly
(P700)
Schematic
Diagram
and
Component
Locations
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Indicator
Assembly
(PSOO)
Schematic
Diagram
and
Component
Locations
8.2
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