Marantz SR 12 S 1 Service Manual

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TABLE OF CONTENTS

SECTION

1.TECHN|CAL SPECIFICATIONS AND SERVICE TOOL

2.TECHN|CAL DESCRIPTION ........................................ .

3.WIR|NG DIAGRAM.. .7

4. BLOCK DIAGRAM...
.SCHEMATIC DIAGRAM .
. PARTS LOCATION .........
. IC DATA ...............................................
.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 ................................................................................. 77

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Please use this service manual with referring to the user guide ( D.F.U. ) without fail.
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SR-1231

Part no. 05AJ855010
First Issue 2003.08
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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, othenNise such part order will be considered as null and void.

- USA - - EUROPE I TRADING - 7 CANADA
MARANTz AMEFIICA, INC MARANTZ EUROPE B.v. LENBROCK INDUSTRIES LIMITED
1100 MAPLEwooo DRIVE P. O. BOX 8744, BUILDING SILVERPOINT 633 GRANITE COURT,
ITASCA, IL. 60143 BEEMDSTRAAT 11, 5653 MA EINDHOVEN FICKEFIING, ONTARIO L1w 3K1
USA THE NETHERLANDS CANADA
PHONE : 630 . 741 - 0300 PHONE: +31 - 40 - 2507844 PHONE : 905 - 831 - 6333
FAX : 630 - 741 - 0301 FAX : +31 - 40 - 2507860 FAX : 905 , 831 - 6936
7 Pnnl-ESSIUIIIAL AMERICAS 7 7 PHUFESSIDNAL AUSTRALIA 7 , Pnal-ESSIDIIIAL HONG KONG 7
SUPEFISCOPE TECHNOLOGIES, INC. TECHNICAL AUDIO GROUP PTv, LTD Jolly ProAUdio Broadcast Engineering Ltd.
MAFIANTZ PROFESSIONAL PRODUCTS 43-53 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 - 4800 PHONE : +61 - (0)2 - 9519 - 0900 PHONE : 852 - 21913660
FAX : 630 - 320 - 8103 FAX : +61 » (0)2 - 9519 - 0600 FAX : 852 - 21913990
7 AUSTRALIA - - THAILAND - -SINGAPORE -
auaIIFi Pry Ltd, MRz STANDARD CO., LTD wo KEE HONG DISTRIBUTION PTE LTD
24 LIONEL ROAD, 746 - 754 MAHACHAI ROAD, 130 J00 SENG ROAD
MT. WAVERLEY VIC 3149 WANGBURAPAPIROM, PHRANAKORN, «03-02 OLIVINE BUILDING
AUSTRALIA BANGKOK, 10200 THAILAND SINGAPORE 368357
PHONE : +61 - (0)3 - 9543 - 1522 PHONE : +66 . 2 - 222 9181 PHONE : +65 6858 5535 / +65 6331 3621
FAX : +61 - (0)3 - 9543 - 3677 FAX : +66 - 2 - 224 6795 FAX :+65 6858 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, 148 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 - 8451958 PHONE : +336 - 2 - 25221304 SELANGOR DARUL EHSAN, MALAYSIA
FAX : +64 - 9 . 3463554 FAX : +836 » 2 - 25630415 PHONE : +60 - 3 - 7954 3088
FAX : +60 - 3 - 7954 7088
7 JAPAN Technical - KOREA
MARANTZ JAPAN.INC. E 2k V 5 J y Ii 3% 3 fl MK ENTERPRISES LTD.
35- 1, 7- CHOME, SAGAMIONO ROOM 604/605, ELECTRO-OFFICETEL, 16-58,
SAGAMIHARA - SHIV KANAGAWA 3GA, HANGANG>RO, YONGSAN-KU, SEOUL
JAPAN 228-8505 4: 71 T22858505 KOREA
PHONE : +81 42 7481013 733% I IETHIEEWREXWGM pHONE ; +822 _ 3232 .155
FAX : +81 42 741 9190 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.

030307MIT

Page 40

0K51 : AK5383

Pin Description

No. Pin Name I/O Function
1 VREFL O Lch Reference Voltage Pin, 3.75V
Normally connected to GNDL with a 10|F electrolytic capacitor and
a 0.1uF ceramic capacitor
2 GNDL - Lch Reference Ground Pin, 0V
3 VCOML O Lch Common Voltage Pin, 2.75V
4 AINL+ | Lch Analog positive input Pin
5 AINL- l Lch Analog negative input Pin
6 ZCAL | Zero Calibration Control Pin
This pin controls the calibration reference signal.
"L": VCOML and VCOMR
"H": Analog input Pins(A|NL 1, AINRi)
VD - Digital Power Supply Pin, 3.3V
8 DGND - Digital Ground Pin, 0V
9 CAL 0 Calibration Active Signal Pin
"H" means the offset calibration cycle is in progress. Offset calibration starts
whenfi goes "H". CAL goes "L" after 8704 LFtCK cycles for DFS="L",
17408 LRCK cycles for DFS ="H".
10 W l Reset Pin
When "L", Digital section is powered-down. Upon returning "H", an
offset calibration cycle is started. An offset calibration cycle should always
be initiated after power-up.
11 SMODE2 | Serial Interface Mode Select Pin
12 SMODE1 | MSB first, 2's compliment.
SMODE2 SMODE1 MODE LRCK
L L Slave mode : MSB justified : H/L
L H Master mode :Similar to |2S : H/L
H L Slave mode : I25 : L/H
H H Master mode: IZS : L/H
13 LRCK I/O Left/Right Channel Select Clock Pin
LRCK goes "H" at SMODE2="L" and "L" at SMODE2="H" during reset
when SMODE1 H".
14 SCLK l/O Serial Data Clock Pin
Data is clocked out on the falling edge of SCLK.
Slave mode:
SCLK requires more than 48fs clock.
Master mode:
SCLK outputs a 128fs(DFS="L") or 64fs(DFS="H") clock.
SCLK stays "L" during reset.
15 SDATA 0 Serial Data Output Pin
MSB first, 2's complement. SDATA stays "L" during reset.
16 FSYNC l/O Frame Synchronization Signal Pin
Slave mode:
When "H", the data bits are clocked out on SDATA. ln IzS mode, FSYNC is
Dont care.
Master mode:
FSYNC outputs 2fs clock. FSYNC stays "L" during reset.
17 MCLK | Master Clock Input Pin
256fs at DFS="L", 128fs at DFS="H".
18 DFS | Double Speed Sampling Mode Pin
"L": Normal Speed
"H": Double Speed

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