Marantz SR 7400 Service Manual

Page 1

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Manual AV Surround Receiver

PS7400 /F1N
AV Surround Amplifier

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TABLE OF CONTENTS

SECTION
1.TECHNICAL SPECIFICATIONS.
2.TECHNICAL DESCRIPTION
3.WIRING DIAGRAM ..................
4. BLOCK DIAGRAM ............
.SCHEMATIC DIAGRAM
. PARTS LOCATION ...........
. IC DATA ...............................................
.EXPLODED VIEW AND PARTS LIST
9. POWER AMPLIFIER ADJUSTMENT .....
10. SERVICE MODE
11.SYSTEM ERROR..
12. UPDATE FIRMWARE
13. ELECTRICAL PARTS LIST ................................................................................. 63

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Please use this service manual with referring to the user guide ( D.F.U. ) without fail.
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SR7400 / PS7400

Part no. 37AW855010
First Issue 2003.11
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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 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 Fax.. In both cases, the correct part 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 part is required

5. Way of shipment

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

- USA - - EUROPE / TRADING - 7 CANADA
MARANTZ AMERICA, INC MARANTZ EUROPE B.V. LENBROOK INDUSTRIES LIMITED
1100 MAPLEWOOD DRIVE P. 0. BOX 3744, BUILDING SILVERPOINT 633 GRANITE COURT,
ITASCA, IL. 60143 BEEMDSTRAAT 11, 5653 MA EINDHOVEN PICKERING, ONTARIO L1W 3K1
USA THE NETHERLANDS CANADA
PHONE : 630 . 741 70300 PHONE : +31 . 40 . 2507344 PHONE : 905 . 331 . 6333
FAX : 630 . 741 . 0301 FAX :+31 . 40 . 2507360 FAX : 905 . 331 . 6936

7 PROFESSIUIVAL AMERICAS 7 7PHDFESSIDNAL AUSTRALIA 7 T PnaI-ESSIDIVAL HONG KONG 7
SUPERSCOPE TECHNOLOGIES, INC. TECHNICAL AUDIO GROUP PTv, LTD Jolly ProAudio Broadcast Engineering Ltd.
MARANTZ PROFESSIONAL PRODUCTS 4353 Bridge Rd., UNIT 2, 10F. WAH HUNG CENTRE.
2640 WHITE OAK CIRCLE, SUITE A STANMORE NSW 2043 41 HUNG TO ROAD, KWUN TONG, KLN.,
AURORA, ILLINOIS 60504 USA AUSTRALIA HONG KONG
PHONE : 630 » 320 . 4300 PHONE : +61 . (0)2 . 9519 . 0900 PHONE : 352 . 21913660
FAX : 630 . 320 . 3103 FAX : +61 . (0)2 . 9519 . 0600 FAX : 352 . 21913990

7 AUSTRALIA - - THAILAND - -SINGAPORE -
QualiFi PIy LId, MRZ STANDARD CO., LTD wo KEE HONG DISTRIBUTION PTE LTD
24 LIONEL ROAD, 746 . 754 MAHACHAI ROAD, 130 JOO SENG ROAD
MT. WAVERLEY VIC 3149 WANGBURAPAPIROM, PHRANAKORN, 1103702 OLIVINE BUILDING
AUSTRALIA BANGKOK, 10200 THAILAND SINGAPORE 363357
PHONE : +61 . (0)3 . 9543 . 1522 PHONE : +66 . 2 . 222 9131 PHONE :+65 6353 5535/ +65 6331 3621
FAX : +61 . (0)3 . 9543 . 3677 FAX : +66 . 2 . 224 6795 FAX :+65 6353 6073

7 NEW ZEALAND - 7 TAIWAN - 7 MALAYSIA
WILDASH AUDIO SYSTEMS NZ PAI- YUING CO., LTD. wo KEE HONG ELECTRONICS SDN. BHD.
14 MALVERN ROAD MT ALBERT 6 TH FL NO, 143 SUNG KIANG ROAD, 2ND FLOOR BANGUNAN INFINITE CENTRE
AUCKLAND NEW ZEALAND TAIPEI, 10429, TAIWAN R.O.C. LOT 1, JALAN 13/6, 46200 PETALING JAYA
PHONE : +64 . 9 . 3451953 PHONE : +336 . 2 . 25221304 SELANGOR DARUL EHSAN, MALAYSIA
FAX : +64 . 9 . 3463554 FAX : +336 . 2 . 25630415 PHONE : +60 . 3 . 7954 3033

FAX : +60 . 3 . 7954 7033

7 JAPAN Technical - KOREA
MARANTZ JAPAN, INC. E 2k V 5 J v If: 3% 3 fl MK ENTERPRISES LTD.
357 1, 7. CHOME, SAGAMIONO ROOM 604/605, ELECTROVOFFICETEL. 16758,
SAGAMIHARA . SHI. KANAGAWA 3GA, HANGANGFRO, YONGSANVKU, SEOUL
JAPAN 22373505 4: #1 T22878505 KOREA
PHONE : +31 42 7431013 433% I lfitfilfiififitfifixfilasrt PHONE ; +322 . 3232 . 155
FAX :+31 42 741 9190 FAX : +322 . 3232 . 154

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.

030307MIT