Marantz SR 780 Service Manual

Page 1

Service SR780 U,K,KS
M a n u a I AudioNideo Receiver

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TABLE or CONTENTS
SECTION PAGE

1. TECHNICAL SPECIFICATIONS
2. WIRING DIAGRAM .......................
3. BLOCK DIAGRAM ...........................................................................
4. SCHEMATIC DIAGRAM AND PARTS LOCATION (Pattern Side) .
5. IC DATA ..........................................................................................
6. EXPLODED VIEW AND PARTS LIST
7
8
9

. SERVICE PROGRAM
. ELECTRICAL ADJUSTMENTS .
. TEST EQUIPMENT REQUIRED
10. ALIGNMENT PROCEDURES .......
11. TECHNICAL DESCRIPTION ..........................................................................
12. SIGNAL AND CIRCUIT DESCRIPTION
13. ELECTRICAL PARTS LIST ..................

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

maranll®

model SR780

Printed in Japan 291J855010 ACT

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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 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 2

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. othenNise such part order will be considered as null and void.

- USA ----_-- - CANADA " EUROPE [TRADING
MARANTz AMERICA. INC. LENBRDOK INDUSTRIES LIMITED MARANTz EUROPE av.
440 MEDINAH ROAD 633 GRANITE couRT. ROBOX 00002
FIOSELLE, ILLINOIS 60172 PICKERINC. ONTARIO L1W 3K1 BUILDING SFF2
USA CANADA 5600 JB EINDHOVEN
PHONE : 1530 - 307 - 3100 PHONE : 905 - 831 - 6333 THE NETHERLANDS
FAX : 630 - 307 - 2687 FAX :905 - 531 - 6936 PHONE : +31 - 40 - 2732241
FAX : +31 - 4o - 2735573
-MDFESSIDML USA - I- mortsslwvu CANADA - KOREA
SUPERSCOPETECHNOLOGIES. INC. Tc ELECTRONICS CANADA LTD. MK ENTERPRISES LTD.
MARANTZ PROFESSIONAL PRODUCTS 540 FIRING AVE. 2F SHINHAN BLDG. 247-17 SEOKVO-DONG
1000 CORPORATE BLVD.. SUITE D BAIE D'URFE. QUEBEC H9X 3T2 MAPO-KU. SEOUL
AURORA. ILLINOIS 00504 USA CANADA KOREA
PHONE :630 -a20-4000 PHONE : 514 -457 .4044 PHONE :432 - 2 - 323 » 2155
FAX :630-820-8103 FAX :514-457~5524 FAX :431-2-323-2154
-BRAZIL '- -THAILAND - - HONG KONG
MARANTz BRAZIL MRz STANDARD co.. LTD. FORWARD INTERNATIONAL CORR. LTD.
CAIXA POSTAL 21462 746 - 754 MAHACHAI FiD.. 3F..BLOCK~B wo KEE HONG BLDG. 535009
CEP 04693-970 WANGBURAPAPIROM. PHRANAKORN. CASTLE PEAK RD. KWAI CHUNG. NT.
SAO PAULO. SP. BRAZIL BANGKOK. 10200 THAILAND HONG KONG
PHONE :0300 - 1231 23(W Direta GIaIuIIa) PHONE : +33 - 2 - 222 - 9131 PHONE : +052 24942033
FAX :+5511 534. 3933 FAX :+65 . 2 - 224 - 6795 FAX : +352 24101656
- AUSTRALIA I NEW ZEALAND -- "TAIWAN ' MALAYSIA
SCAN AUDIO PTV. LTD. PAI-YUING co., LTD. wo KEE HONG ELECTRONICS SDN. BHD.
52 CROWN STREET. RICHMOND 3121 6 TH FL N0. 143 SUNG KIANG ROAD. NO. 102 JALAN 59 21/35. DAMANSARA
VICTORIA TAIPEI. 10429. TAIWAN R.O.c. UTAMA. 47400 PETALING JAVA
AUSTRALIA PHONE : +886 (2) 5221304 SELANGOR DARUL EHSAN,
PHONE :+61 ~ 3 - 9429 - 2199 FAX :+886 (2) 5530415 MALAYSIA
FAX 2+61*3'94299309 PHONE:+603-7134666
FAx :+00 3 -7173828
-JAPAN Technical - SINGAPORE
MARANTz JAPAN, INC. 8 2F 7 7 / J 1% it % $i FORWARD MARKETING (S) PTE. LTD
35» I .7. OHOME. SAGAMIONO _ 23, LORONG 3. TOA PAVOH.
SAGAMIHARA-SHI, KANAGAWA :3: #t T228-8505 sINGAPORE 319257.
JAPAN 223-3505 13% Ifitfifilfififitfifirfi 7 - 35 » 1 PHONE :+65 2583640
PHONE : +81 427 4a 9379 33:21:30 T 1500022 FAX : v65 3564047
FAX :+e1427430339 eeeaezmfise 1 ~11 >9

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.

SOOZIBACT