Marantz SR 48 Mk2 Service Manual

Page 1

Service
Manual

SR-68U
SR-48mk2U
74SR39/023

Hi-Fi stereo receiver

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SIR-48mm 58-39
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TABLE OF CONTENTS
SECTION
1. TECHNICAL SPECIFICATIONS

. WIRING DIAGRAM .........................
. BLOCK DIAGRAM ........................................................
. SCHEMATIC DIAGRAM AND PARTS LOCATIONS

. ADJUSTMENTS PROCEDURE ..........................................
. EXPLODED VIEW AND PARTS LIST (SR-68/SR-48mk2) .

. EXPLODED VIEW AND PARTS LIST (SR-39) ......................................................................................... 29
. ELECTRICAL PARTS LIST ....................................................................................................................... 31

2
3
4 ..
5. MICROPROCESSOR DESCRIPTIONS
6
7
8
9

Please use This service manual wiih referring to the user guide (D.F.U) without fail.

maranll®

Primed in Japan

model SR-68/SR-48mk2/SR-39

4822 725 51193
First Issue:1999.04
266W855010 A0

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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 pans can insure that your MARANTZ product will continue to perform to the specifications for which

it is famous.

Parts for your MARANTZ equipment are

ORDERING PARTS :

generally available to our National Marantz Subsidiary or Agent.

Parts can be ordered either by mail or by Fax.. In both cases, the correct pan 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

3. Description of parts

4. Model number for which pan is required

5. Way of shipment

6. Signature : any order form or Fax. must be signed, otherwise such part order will be considered as null and void.

- USA E
MARAN'II AM ERICA, INC.

CANADA I
LENBROOK INDUSTRIES LIMITED

SUPERSCOPE TECHNOLOGIES, INC.
MARANTZ PROFESSIONAL PRODUCTS
2640 WHITE OAK CIRCLE, SUITE A
AURORA, ILLINOIS 60504 USA

PHONE : 830 - 620 - 4800

440 MEDINAH ROAD 633 GRANITE COURT,
ROSELLE, ILLINOIS 60172 PICKEFIING, ONTARIO L1W 3K1
USA CANADA
PHONE : 630 . 307 - 3100 PHONE : 905 - 831 - 6333
FAX : 630 - 307 - 2687 FAX : 905 - 331 - 6936
FMFESSIDML usA mare-scram: CANADA

*I

TO ELECTRONICS CANADA LTD.
540 FIRING AVE,

BAIE DI'URF.... QUEBEC H9X 3T2
CANADA

PHONE : 514 -457 - 4044

l'EUROPE l TRADING

MARANTZ EUROPE B. V.
P.O.BOX 80002

BUILDING SFFZ

5600 JB EINDHOVEN

THE NETHERLANDS
PHONE : +31 - 40 - 2732241
FAX : +31 ~ 40 - 2735578

- KOREA -

MK ENTERPRISES LTD.

2F SHINHAN BLDG, 247-17 SEOKYODONG
MAPO-KU, SEOUL

KOREA

PHONE : 432 - 2 - 323 - 2155

SCAN AUDIO PTY. LTD.

52 CROWN STREET, RICHMOND 3121
VICTORIA

AUSTRALIA

PHONE : +61 -3 - 9429 - 2199

FAX :+61»3~9429-9309

PAI- VUING CO.. LTD.

6 TH FL NO, 146 SUNG KIANG ROAD.
TAIPEI, 10429, TAIWAN R.0.C.
PHONE : +686 (2) 5221304

FAX : +886 (2) 5630415

~JAPAN Technical

MARAN'IZ JAPAN, INC.

35- l , 7- CHOME, SAGAMIONO
SAGAMIHARA - SHI, KANAGAWA
JAPAN 228-8505

PHONE : +81 42 748 1013

FAX :+61 42 741 9190

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31!th 7150-0022
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FAX :630 - B20 - 8103 FAX : 514 - 457 - 5524 FAX :+82 - 2 - 323 - 2154
-BRAZIL -THAILAND

MARANTZ BRAZIL MRZ STANDARD CO.. LTD.

CAIXA POSTAL 21462 746 - 754 MAHACHAI RD.,

CEP 04698-970 WANGBURAPAPIROM, PHRANAKORN,

SAO PAULO, SP, BRAZIL BANGKOK, 10200 THAILAND

PHONE : 0800 -123123(DismemDirBtaGrmitaI PHONE : +66 - 2 - 222 - 9181

FAX :+55 11 534. 8998 FAX : #56 - 2 > 224 - 6795
l" AUSTRALIA I NEW ZEALAND 'TAIWAN ' MALAYSIA

W0 KEE HONG ELECTRONICS SDN. BHD.
NO. 102 JALAN SS 21/35, DAMANSARA
UTAMA, 47400 PETALING JAYA
SELANGOR DARUL EHSAN,

MALAYSIA

PHONE : +60 3 - 7184666

FAX 2+603-7173823

l' SINGAPORE

FORWARD MARKETING (S) PTE. LTD.
23, LORONG a, TOA PAYOH,
SINGAPORE 319257.

PHONE : +65 2583640

FAX : +65 3564047

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 it is return to the user/customer.

Ref. UL Standard No. 1492.

In case of difficulties, do not hesitate to contact the Technical
Department at above mentioned address.

981110A.O