Marantz SR2000 User manual

7.2
TUNER
BOARD
SCHEMATIC
DIAGRAM
AND
COMPONENT
LOCATIONS
—
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7.3 MAIN AMP/POWER SUPPLY BOARD SCHEMATIC DIAGRAM AND COMPONENT LOCATIONS — P700 7.4 TONE AMP BOARD SCHEMATIC DIAGRAM AND COMPONENT LOCATIONS — PEO00
| PEOO TONE ASSY ]
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ree en en ee
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7.5 PUSHSWITCH BOARD SCHEMATIC DIAGRAM AND COMPONENT LOCATIONS — PS00
807
CAUTIONS ‘ [rsx PSOO SWASSY
| REPLACE WITH SAME TYPE FUSE
Deank y812
54250
AT 250
J811
‘5 j FOR CANADA
1 FOR EURQBELU.K
807
| cao2 ;
a |
Rs04 |
Losreos rvosr cosr
rg
CAUTION
U7
10 ; 11

7.6 HEADPHONE JACK BOARD SCHEMATIC DIAGRAM AND COMPONENT LOCATIONS — Pwoo
Fives 1
c
wae
oo.
xii Lyxos 4x08 | JX04] sxa6:
C—O ee mere ae oe
ch METER ADJ,
RXO8 Ik 0x03 AXO3 33011W)
AW 4 4
ero i
S¥stem 2
xu
Paaea ger
Peon 3
vzoi
By
foomA
IP250 1
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JZ5i : : 3zs2
12

8. EXPLODED VIEWS AND PARTS LIST
8.1 [€01-99] FRONT PANEL
For(N) TYPE
004B
For(N) TYPE
0048
@ (U): for U.S.A.
@(C): for Canada
@ (N): for Europe
ae [|
2112063400 Front Pane! Assembiy
2112063410 Front Panel Assembly
2112158110 Window, Dial
2112158120 Window, Meter
2112063010 Escutcheon
2112063110 Escutcheon, Low Filter
2112063040 Escutcheon, Wood
2112063050 Escutcheon, AL.
2112160020 Bracket (R)
2112160030 Bracket (L)
2112154010 Knob
2112115010 Spring
53118169A0 Hexagon Nut
2112154020 Knob
2112154030 Knob
2112154040 Knob
51100308A9 | B.H.M. Screw
51280308B0 | B.H. Tapped Screw
51400310A0 B.H. Tapped Screw
51280306B0 B.H. Tapped Screw
51280308B0 B.H. Tapped Screw
41280308B0 B.H. Tapped Screw
2112303010 Mask
2276005050 Clamper
2112259020 Bushing
2112259030 Bushing
13

MARANTZ DESIGN AND SERVICE
Using
superior
design
and
selected
high
grade
components,
MARANTZ
Company
has
created
the
ultimate
in
stereo
sound.
Only
originat
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
tap
com-
puter
terminal
and
can
quickly
determine
the
availability
and
price
information
you
require.
1f,
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
mai!,
usze
MARANTZ
parts
order
torms
which
are
available
from
our
National
Parts
Depot
located
at
the
following
address:
:
SUPERSCOPE NATIONAL PARTS DEPARTMENT
20525 Norchoff Street
Chatsworth, California 91311
Phone: [phone]
1-213-998-9333
The
following
information
must
be
supplied
to
eliminate
defays
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).
CP Ne
Direct
consumers
will
be
provided
with
the
current
retail
price
quotation
on
available
parts
in
order
to'advise
them
of
the
cost
of
the
parts
and
shipping.
;
OVERSEAS PARTS ORDERING
Parts may aiso be ordered from the following overseas addresses: |
CANADA
-
AUSTRALIA
©
JAPAN
Superscope
Canacla,
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
L4VIM5
|”
Austratia
,
Kanagawa,
Japan
EUROPE
Superscope
Europe,
S.A.
Marantz
France
Marantz
Audio
U.K.
Ltd.
Superscope
GmbH
Avenue
Leopold
IIf,
2
~-Rue
Louis
Armand
9
London
Road,
203
Max-Planck-Strasse
22
7120
Peronnes-Lez-Bincne
-
92600
Asnieres
Staines
D-6072
Dieieich
7
Belgium
'
Hauts-de-Seine
‘Middlesex
West
Germany
France
—
2S
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
event
that
_
there
is
no
service
location
fisted
for
your
country,
please
contact
the
nearest
facility
for
the
necessary
assistance.
:
, mame Been we for.
_ We sound better

TABLE GF CONTENTS
Section Title Page
1, PW.BGARDS ......... ius Gi inlesboasialia desler wpeviefie'-d afin goa uaCaNa iar dagsxl be arava dye iste ee eda ena, pit aneite a ead ace tae oh oc 8
2, TEST EQUIPMENT REQUIRED FORSERVICING .......0 0.0.00 cece cece ee ce eee teense $a ore BAO aR ease wl Berean eee 3
3. FM ALIGNMENT PROCEDURES ............... tao cat opts corer Shins gu GahaiT esa he Ld uiety stain sha al cglterd) wl bam cbs are ana" eb a pea iterate gate 4
3.1. Tuning Meter Alignment ......... iy ea aates ar wile! Statics jnsaareimiint ous ac Gh aitarea) & erGua raat. er eee am ork ig, Date! vel Ven euny ee one 4
3.2 FM Tracking Alignment... 0... ee ees Sabaneta’ anndey aes nis “vk otenage iter lated aaretare te wee ce 4
3.3 FMUF Alignment... .. dy causal ahs Goad oS Bs wise Eider Shins“ orfavag wie s0ijd ap ie pes ie Blan Wyatanwccai Uh Gr eiteriel tay aiterg caigea de Sw anal) anak ate Suey 4
3.4 Mono Distortion Alignment........ Fetch fake se ten elucrieine! Deh Ee Nea, laa! ana te Matea acetates a atleitesei ae aa eeuaeeaoe beatae ad Beraaa vay Ga 4
3.5 Stereo Distortion Alignment ......... ria dpgisa aire Vets akesey ues “#41 058. ce Seyi lacara) era valves ela rat el, Gace ta tape: tora ads ie tatbury iuaret an arasien 4
3.6 Multiplex Alignment ,....... eicheats rem ah arart. nineteen toads or bseetar ign tat as 'oSaP iw"w eile ere “aM GE Sey Wins. Wear bine! feel a weule “oan eee 5
3.7 Steres Separation Alignment 2... ee ee ee tee tee eee ete eee eee eee 5
3.8 Muting Level Alignment... .........-... are Tela “osteo. weds A fests: ‘er'n Se saCa ata era? ce uasiwa elas tarde Rtas ase gue’ aoa ate Boe 5
4, AMALIGNMENT PROCEDURES... 00... 0 ec ee te ee eee ee eee ee eens §
4.1 AMIF Alignment ......... Pe a ee 5
4.2 AMTracking Alignment.............-.. Sia ee erat wa we, eee Me gy Seaton poe arin a: wueteel ps ULI a de eS Srelewere fe where 8, te 5
§. AUDIO ADJUSTMENT ooo ee eee a ie ee ee dee erent ieee ES 0 Were OES a eae ae wg ne alee wee eee ee 6
5.1 Voltage Adjustment ......-.....0004 gid ovstatd WiGraswc die he atarens “ay avutige ene Aoi eta saaabar Gis, gia Saye hdcas erect ite teh ara avaebweits 6
6.2; Poiver! Matar Calibration «6.506 b.c00 oe tics yet le eta te Sev eee, aS PhS a Sale ays wile awn lio oa wna) ese Goiasel ashe! few a ere et 6
6. VOLTAGE CONVERSION oi ccn5 6 colic vtensee w eras eoa e Oe ewe wlohe etd Dow: aE bie ecw whe Ses wte aes Merde wee ene Shae ca aeae 6
7, DIAGRAMS 2... wc ccc cc et ce te ee eee 4 farsboclip Secep Ry Rican uk ae ae cetyl “es ap oh wage adam wl btareier a aveie eh auc abeieeate te 7
7.0 Block Diagram 2... 1... ee ee soi va ehaie ouceredshev als i: aint Puch eitarie “or ev eeeitasianai sat Tare .rsa,sawe rater fy ooo Siena dy ataved tern ars 7
7.2) Tuner Board Schematic Diagram and Component Location-P100 ....... 00000. ., 2 eee eee Siebel ab Nel seta eerste carer ie 8
7.3 Main Amp/Power Supply Board Schematic Diagram and Component LocationsP700 ............ Seeeata echt eve: Sista Brace 10
74 Tone Amp Board Schematic Diagram and Component Locations-PEOO..... Dia tatinies'ei utes GNaicevaRen epauincar puanel 9 Faecei war a/auacasahose 14
7.5 Pushswiteh Board Schematic Diagram and Component Locations-PS00...-........... i av ay ea, aye dl cdng aewerard Wy sh Ete hie Cress 1
7.6 Headphone Jack Board Schematic Diagram and Component LocationsPW0O 22... ee ee ee 12
7.7 Power Meter/Speaker Switch Board Schematic Diagram and Component Locations-PXO0 2... 0... 0. ce ee ee ee eee 12
7.8 Stereo LED Board Schematic Diagram and Component Locations-PYODO 2... ee ee ee ee 12
7.9 Dial Pointer Lamp Board Schematic Diagram .and Component Locations-PZ00 . 2.0.0.0... ce ee ee ee ee eee 42
7,10 Tuning Meter Lamp Board Schematic Diagram and Component Locations PZ50 ..........-0. Deity “aise. Syste tess chat oteea ek, ars eee 12
8. EXPLODED VIEWS AND PARTS LIST 1.2.2... 0... 0c ee eee ee eee eee ee ee ep er eens 13
8.1 [€01-99} Front Panel 2.2.2... 2... doll aia tartan sees Spleen ed digrtee ah te ovdles ak a acpaih terete ence Naeetes hie are eae 13
8.2 (€02-99] TopCover.............. satiasra i Sanaite ea) obe Py Bocas ace ate™epa lat soia eae hee, 2, Page si elle toe we miebested 14
8.3 [C03-99} Rear Panet. ... 0... ee rahat ates es Ses wcidtataevat hE iG AENeias aceecesasehB al eae arlene 15
8.4 [P01-95] Front Chassis and General Parts 2.0... 1. ee ee ee eee eee yar btw cde aten een 16
8.5 [P0299] Chassis and Other Parts ...........--. Aessaiyio cast ep hai ete 20d RR OES Se aca lp te Rolhtacte Shes aim, hiatal asey 17
8.6 [HO1-99] Packing Materials... 0. ee te ee ee eee ter eee ee eee eee ee ene 18
8:7. Electreal! Parts scx, a cescots ao eSys ahah oa teajaaparn ekncaee aah odo 7e wigs ok Guo wales avec AngvayS wade UAd agente dia beeen a eee 19
9.

INTRODUCTION
This service manual was prepared for use by Authorized
Warranty Stations and contains service information for
Marantz Model SR-2000 Stereophonic Receiver.
Servicing information and voltage data included in this
gram.
manual are intended for use by the knowledgeabte and ex-
perienced technician only. All instructions should be read 1
carefully. No attempt should be made to proceed without B)
a good understanding of the operation of the receiver.
The parts tist furnishes information by which replacement
parts may be ordered from the Marantz Company. A simple
description is included for parts which can usually be ob-
tained through local suppliers.
1. P.W. BOARDS
As can be seen from the circuit diagram the chassis of
Model SR-2000 consists of the follawing units. Each unit
mounted on a printed cifcuit board is described within the
square enclosed by a bold dotted line on the circuit dia-
moe W
Oo wm
2. TEST EQUIPMENT REQUIRED FOR SERVICING
. Tuner
. Main Amp/Power- Supply
. ToneAmp....--. ee rlurited on P.W. Board PEOO
. Pushswitch
. Headphone Jack ...... mounted on ?.W. Board PWOO
. Power Meter/Speaker Switch
sted aie 'y Shensndtetaw mounted on P,W,. Board PXOO
. Stereo LED ......... mounted on P,W. Board PYOO
. Dial Pointer Lamp
. Tuning Meter Lamp
side lesa gt. Since aegis mounted on PW. Board P100
mounted on P.W. Board P700
on Dedaw apis -. mounted on P.W. Board PSOO
. mounted on P.W. Board PZ00 —
. mounted on P.W. Board PZ50
This table lists the test equipment required for servicing the Model SR-2000 Receiver.
Manufacturer and Model No.
AM Signal Generator
Test Loop
~ Use with AM Signal Generator
FM Signai Generator
MPX Signal Generator
Sound Technology
Mode! 10004
Signal source for FM alignment
Stereo separation alignment and trouble
shooting —
Distortion Analyzer
Audio Osciliator
AC VTVM
Sound Technology
Model 1700A
Oscilloscape
“Tektronix Model T932
Distortion measurements |
Sinewave and squarewave signa! source
Voltage Measurements {AC)
Phili ips ‘Mode! 3232
Waveform analysis and troubie shooting and
ASO lignin
‘Frequency Counter
Fluke Model 4 900A
Circuit Tester
DC VTVM
AC Wattmeter
- Model 313, Triplet Model 80
Trouble shooting
Fluke Model 8000 “Digital” Simpson
vole measurements ae)
Simpson Model 1379
AC Ammeter
Line Voltmeter
Variable Autotransformer
Shorting Plug
Output Load. (8 ohms,
+ 0.5%, 100W}
Output Load (4 ohms,
+0,5%, 100W}
Commercial Grade (7-TOA}
Simpson Model 1359
Superior Electronic Co.,
__Powerstat Model 116B— 104A
Use phono plug with 600- ohm
across center pin and sheli
Commercial Grade
Commercial Grade
Monitors amplifier output andek short circuit
condition
Monitors potential of primary power to
amplifier
Adjusts level of primary power to eee
Shorts ariplitien input to. ‘eliminate noise
pickup
+ Provides 8-ohm load for amplifier output
termination
Provides 4-ohm load for amplifier output
termination

3.
FM ALIGNMENT PROCEDURES
(Selector switch in the FM position)
3.1. TUNING METER ALIGNMENT
1.
2.
Set the FM signal generator to no signal,
Adjust the secondary core of L201 ((@)} so that the tun-
ing meter may read zero (center position),
NOTE: Place the tuning pointer at 98 MHz adjacency.
3.2 FM TRACKING ALIGNMENT
1.
Connect an FM signal generator to the FM antenna ter-
minals and an oscilloscope and an audio distortion ana-
tyzer to the TAPE OUT jacks on the rear panel,
. Set the FM signal generator to 87.3 MHz and provide
about 3 to 5 wV. Place the tuning pointer at the low fre-
quency end by rotating the tuning knob and adjust the
core of oscillator coil L105 (()} to obtain maximum
audio output. ;
. Set the FM signal generator to 109 MHz and provide
about 3 to 5 uV. Rotate the tuning knob and place the
tuning pointer at the high frequency end and adjust the
trimming capacitor C114 ((D)) for maximum output,
NOTE: Keep the C114 at a half of satisfied capacitance.
4.
5.
Repeat steps 2 and 3 untii no further adjustment is nec-
essary.
Set the FM signal generator to 90 MHz and tune the re-
ceiver to the same frequency. Decrease signal generator
output untif the audio output jevel decreases with the
decreasing generatar output. Adjust the antenna coil
L101 (8), RF coil L103 (©) for minimum audio dis-
tartion.
6.
Set the FM signal generator to 106 MHz and tune the
receiver to the same frequency. Adjust the trimming
capacitors TC; (B)) and TC, (©) for minimum distor-
tion,
. Repeat steps 5 and 6 until no further adjustment is nec-
essary.
3.3 FM IF ALIGNMENT
1.
Set the FM signal generator to 98 MHz and increase its
usable output level and tune the receiver to the same fre-
quency. ‘
. The L106 (©) should be adjusted for maximum output
waveform with decreasing the FM signal generator input
level so that the amount of noise should be the same on
and beneath the waveform. Readjust the L201 for cor-
rect zero point as turning the L106 deviates zero point.
'3.4 MONO DISTORTION ALIGNMENT
i:
2.
3.
4.
Set the FM signa! generator to provide 60 dB at 98 MHz.
Set the modulation of FM signal generator to 1 kHz,
100%.
Place the tuning meter pointer at the center position.
Adjust the primary core (upper) of L201 ((F)) for mini-
mum distortion,
25 STEREO DISTORTION ALIGNMENT
1.
2.
3.
Set the FM signal generator to provide stereo composite
signal and tune the receiver to the same frequency,
Adjust the L106 (©) for minimum distortion.
Repeat the adjustment of L201 so that the tuning meter
may read zero. ,
g ©
LAOS
® .
LSOl
AM ANT
COIL D> Aol
@
S) R313
Q @ [race | “lem Separation
ADJ.
[2D _ oxo
L201
I9kHz 3akHz DIS.cotL (4)
Q40)
402
AM SWEEP INPUT ©)
7) Tco4
~ AM OSC
eae
UPPER: MO rr ISFORTION
1
af jReor -—t LI} =
Ojem muting @ Ter ®
R225 ADJ. FM ANT Liot
ee Cees Lios5
y d | FM OSG
U
AM ANT
0
EM ANT,
COR
Figure 1. Adjustment Point Locatians

3.6 MULTIPLEX ALIGNMENT
1
2
. 3.
4,
Connect a frequency Counter to test point J301.
Set the FM signal generator to provide 60 dB {1 mV) at
98 MHz.
Tune the receiver to the same frequency so that the cen-
ter tuning meter pointer indicates its center.
Turn off the modulation of the FM signal generator and
adjust the R304 (@) so that the frequency counter may
a precisely react 19.08 kHz.
"3.7 STEREO SEPARATIGN ALIGNMENT
1,
Set the FM signal generator to provide stereo composite
signal and tune the receiver to the same frequency so
that the center tuning meter pointer indicates its center.
. Adjust the R313 ()} for maximum and same separa-
tion in both channels.
3.8 MUTING LEVEL ALIGNMENT
1.
2.
3.
Set the FM signal generator to provide 22 dB {12,6 nV)
at 98 MHz, ,
Set the modulation of FM signal generator to 1 kHz,
100%, ,
Tune the receiver to the same frequency so that the cen-
ter tuning meter pointer indicates its center.
. Turn on FM MUTING pushswitch.
. Turn the R207 (C1) until the output waveform disap-
pears and adjust it to a point where the waveform comes
to appear again:
Figure 2. Dial Stringing
4. AM ALIGNMENT PROCEDURES
(Selector switch in the AM position)
4.1 AM IF ALIGNMENT
1
Connect a sweep generator to the tuning capacitor C120
{for AM oscillator) and an alignment scope to the test
point JAGG.
. Rotate each core of IF transformers LAGS (()) and
LAO6 (D) for maximum height and flat top symmetrical -
response.
4.2 AM TRACKING ALIGNMENT
1.
Set the AM signal generator to 520 kHz. Tum ‘the tuning
capacitor fully closed (place the tuning pointer at the
low end) and adjust the oscillator coil LAO4 (OD) for
_ maximum audio output.
. Set the AM signa! generator to 1650 kHz, Piace the tun-
ing pointer in the high frequency end and adjust the
trimming capacitor TC, ((L)) for maximum audio output.
. Repeat steps 1 and 2 until no further adjustment is nec-
essary.
. Set the AM signal generator to 600 kHz and tune the re-
ceiver to the same frequency and adjust a slug core of
AM ferrite-rod antenna LO51 (K)} for maximum output,
. Set the generator to 1400 kHz and tune the receiver to
the same frequency and adjust the antenna trimming
capacitor TC, (KK) for maximum output,
. Repeat steps 4 and 5 until no further adjustment is nec-
essary.
NOTE: Use the loop for AM tracking alignment.