Marantz SR 7300 OSE Service Manual

Page 1

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SR7300F /N1B/U1B/K1G/N1G/U1G

Manual AV Surround Receiver

PS7300 /F1B/F1N
AV Surround Amplifier

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TABLE OF CONTENTS
SECTION PAGE
1.TECHNICAL SPECIFICATIONS AND SERVICE TOOL.

2.TECHNICAL DESCRIPTION .................
3.W|RING DIAGRAM .......
4. BLOCK DIAGRAM....
5. SCHEMATIC DIAGRAM
6. PARTS LOCATION
7. IC DATA .........................
8. EXPLODED VIEW AND PARTS LIST
9. SERVICE PROGRAM ........
10. UPDATE FIRMWARE ........
11. POWER AMPLIFIER ADJUSTMENT
12. SYSTEM ERROR ..............
13.TROUBLE SHOOTING.
14. ELECTRICAL PARTS LIST

Please use this service manual with referring to the user guide ( D.F.U. ) without fail.
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SR7300 / SR73000SE / PS7300

03AJ85501O MIT
First Issue 2002.11

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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. 30143 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 . 6933

7 PRUFESSIUNAL AMERICAS 7 TPHUFESSIDNAL AUSTRALIA 7 T PnaFESSIDNl HONG KONG 7
SUPERSCOPE TECHNOLOGIES, INC. TECHNICAL AUDIO GROUP PTv, LTD Jolly ProAudio Broadcast Engineering Ltd.
MARANTZ PROFESSIONAL PRODUCTS 553 DARLING STREET, UNIT 2, 10F. WAH HUNG CENTRE.
2340 WHITE OAK CIRCLE, SUITE A BALMAIN, NSW 2041, 41 HUNG TO ROAD, KWUN TONG, KLN.,
AURORA, ILLINOIS 60504 USA AUSTRALIA HONG KONG
PHONE : 630 » 320 . 4300 PHONE :61 . 2 . 9310 . 5300 PHONE : 352 . 21913660
FAX : 630 . 320 . 3103 FAX :31 . 2 . 9310 . 5355 FAX : 352 . 21913990

7 AUSTRALIA - 7 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 : +63 . 2 . 222 9131 PHONE : +35 3353 5535/ +65 6331 3321
FAX : +61 . (0)3 . 9543 . 3677 FAX : +66 . 2 . 224 6795 FAX :+65 6353 3073

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, 43200 PETALING JAYA
PHONE : +64 . 9 . 3451953 PHONE : +333 . 2 . 25221304 SELANGOR DARuL EHSAN, MALAYSIA
FAX : +64 . 9 . 3463554 FAX : +336 . 2 . 25330415 PHONE : +60 . 3 . 7954 3033

FAX : +60 . 3 . 7954 7033

7 JAPAN Technical - KOREA
MARANTZ JAPAN, INC. E 2k V 5 J y H: 3% 3 fl MK ENTERPRISES LTD.
357 1, 7. CHOME, SAGAMIONO ROOM 604/605, ELECTROVOFFICETEL. 16758,
SAGAMIHARA . SHI, KANAGAWA 4: 11 T22878505 36A, HANGANGROY YONGSANVKU, SEOUL
JAPAN 22373505 ¥$§JHEFHI§Efi1fi1§K¥i7PSSP1 KOREA
PHONE : +31 42 7431013 Egému T150 0022 PHONE ; +322 . 3232 . 155
FAX :+31 42 741 9190 fifisfiifiegfistfifirns 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.

020816MIT

Page 39

11. POWER AMPLIFIER ADJUSTMENT
Idling Current Alignment

1. Each of the measurement points are provided with the two test points. Set a digital Voltage meter to DC voltage input,
connect the meter to the test points at both contact points.

2. After the setup above, turn on the main switch and heat up the amplifier about 10 minutes.

3. Adjust variable resistors (R137, R138...R338) according to the digital voltmeter readings. The target setting value is 4.9
mV +/- 0.05 mV for each channels.

Settings : Master Volume --- Minimum
Speaker out --- No Load

Top lid --- OPEN
Alignment Measurement

Channel . .
Pomt Pomt
Front L R137 J107
Center R337 J106
Front R R273 J103
Surr. L R138 J105
Surr. R R238 J108
SB R338 J104

Time Table of Idling Current Rise

M tV It
After Turning ON easurem:n 0 age

(Fl )
5 min. 4.5 mV
10 min. 4.9 mV
20 min. 5.5 mV
30 min. 6.2 mV
40 min. 6.8 mV
60 min. 7.0 mV

55