Marantz SR 7500 Service Manual

Page 1

Service
Manual

SR7500 /A1B/A1S/K1G/L1G
/N1B/N1G/N1S/U1B

SR8500 /A1B/A1S/L1G/N1 B

/N1G/N1S/U1 B
AV Surround Receiver

PS7500 /F1N

2nd EDITION

- 1,25 and 27 pages were changed.

PSB500 /F1N

AV Surround Amplifier

TABLE OF CONTENTS
SECTION PAGE
1. TECHNICAL SPECIFICATIONS ........................................................................................... 1
2. TECHNICAL DESCRIPTION ........ 4
3. POWER AMPLIFIER ADJUSTMENT 8
4. SERVICE MODE ........................... 9
5. SYSTEM ERROR .. .11
6. UPDATE FIRMWARE. .12
7. WIRING DIAGRAM ..... ,. 19
8. BLOCK DIAGRAM ...... .. 21
9. SCHEMATIC DIAGRAM.. .. 23
10. PARTS LOCATION .............................................................................................................. 45
11. IC DATA ............................................................................................................................... 61
12. EXPLODED VIEW AND PARTS LIST ..
13. ELECTRICAL PARTS LIST ................................................................................................. 97

Please use this service manual with referring to the user guide ( D.F.U. ) without fail.
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2nd Issue 2004.11

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Page 2

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, otherwise such part order will be considered as null and void.

- USA

MARANTZ AMERICA, INC
1100 MAPLEWOOD DRIVE
ITASCA, IL. 60143

USA

PHONE : 630 - 741 - 0300
FAX : 630 - 741 - 0301

- EUROPE/TRADING
MARANTZ EUROPE B.V.
P. 0. BOX 8744, BUILDING SILVERPOINT
BEEMDSTRAAT 11, 5653 MA EINDHOVEN
THE NETHERLANDS
PHONE : +31 - 40 - 2507844
FAX : +31 - 40 - 2507860

7 CANADA

MARANTZ CANADA INC.
5-505 APPLE CREEK BLVD.
MARKHAM, ONTARIO L3H 5B1
CANADA

PHONE : 905 - 415 - 9292

FAX :905-475-4159

- AUSTRALIA

QualIFi Pty Ltd,

24 LIONEL ROAD,

MT. WAVEFILEY VIC 3149
AUSTRALIA

PHONE : +61 - (0)3 - 9543 - 1522
FAX : +61 - (0)3 - 9543 - 3677

- NEW ZEALAND
WILDASH AUDIO SYSTEMS NZ
14 MALVERN ROAD MT ALBERT
AUCKLAND NEW ZEALAND
PHONE :+64 - 9 . 8451958
FAX : +64 - 9 - 8463554

THAILAND

MRZ STANDARD CO., LTD

746 - 754 MAHACHAI ROAD.,
WANGBURAPAPIROM, PHRANAKORN,
BANGKOK, 10200 THAILAND

PHONE : +66 - 2 - 222 9181

FAX : +66 - 2 - 224 6795

SINGAPORE

WO KEE HONG DISTRIBUTION PTE LTD
No.1 JALAN KILANG TIMOR

08-03 PACIFIC TECH CENTRE

SINGAPORE 159303

PHONE : +65 6376 0338

FAX : +65 6376 0166

- TAIWAN

PAI- YUING C0., LTD.

6 TH FL NO, 148 SUNG KIANG ROAD,
TAIPEI, 10429, TAIWAN R.O.C.
PHONE : +886 - 2 - 25221304

FAX : +886 - 2 - 25630415

MALAYSIA

WO KEE HONG ELECTRONICS SDN. BHD.
2ND FLOOR BANGUNAN INFINITE CENTRE
LOT 1, JALAN 13/6, 46200 PETALING JAYA
SELANGOR DARUL EHSAN, MALAYSIA
PHONE : +60 - 3 - 7954 8088

FAX : +60 < 3 - 7954 7088

7 JAPAN Technical
MARANTZ JAPAN, INC.

35- 1, 7- CHOME, SAGAMIONO
SAGAMIHAFIA - SHI, KANAGAWA
JAPAN 228-8505

PHONE : +81 42 7481013

FAX : +81 42 741 9190

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7 KOREA

MK ENTERPRISES LTD.

ROOM 604/605, ELECTRO-OFFICETEL, 16-58,
36A, HANGANG-RO, YONGSAN-KU, SEOUL
KOREA

PHONE : +822 - 3232 - 155

FAX : +822 - 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.

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