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1、Service Manual Please use this service manual with referring to the user guide (D.F.U) without fail. 309W855010 AO First Issue:2000.10 SR4120/U1B Receiver SR4120 Printed in Japan TABLE OF CONTENTS 1.TECHNICAL SPECIFICATION .1 2.WIRING DIAGRAM.2 3.BLOCK DIAGRAM .3 4.SCHEMATIC DIAGRAM AND PARTS LOCATI
2、ON .5 5.MICROPROCESSOR AND IC DATA .16 6.ADJUSTMENT PROCEDURE .18 7.EXPLODED VIEW AND PARTS LIST.21 8.ELECTRICAL PARTS LIST.23 AUXTAPE MONIFM/AMPHONOCD MINMAX VOLUME UP TUNING/PRESET DOWN RECEIVER SR4120 RL TREBLEBARANCE -+ BASS -+ FM MODEMEMOP.SCANF/P21SPEAKERS ON/STANDBY STANDBY POWER PHONES SR412
3、0SR4120 RadioFans.CN 收音机爱 好者资料库 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
4、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
5、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. S
6、HOCK, 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
7、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 a
8、bove mentioned address. 991207A.O USAUSA MARANTZ AMERICA, INCMARANTZ AMERICA, INC. 440 MEDINAH ROAD ROSELLE, ILLINOIS 60172 USA PHONE : 630 - 307 - 3100 FAX : 630 - 307 - 2687 BRAZILBRAZIL PHILIP DA AMAZONIA IND. ELET. ITDAPHILIP DA AMAZONIA IND. ELET. ITDA CENTRO DE INFORMACOES AO CEP 04698-970 SAO
9、 PAULO, SP, BRAZIL PHONE : 0800 - 123123(Discagem Direta Gratuita) FAX : +55 11 534. 8988 JAPANJAPAN Technical MARANTZ JAPAN, INC.MARANTZ JAPAN, INC. 35- 1, 7- CHOME, SAGAMIONO SAGAMIHARA - SHI, KANAGAWA JAPAN 228-8505 PHONE : +81 42 748 1013 FAX : +81 42 741 9190 EUROPE / TRADING EUROPE / TRADING M
10、ARANTZ EUROPE B.V.MARANTZ EUROPE B.V. P.O.BOX 80002, BUILDING SFF2 5600 JB EINDHOVEN THE NETHERLANDS PHONE : +31 - 40 - 2732241 FAX : +31 - 40 - 2735578 CANADACANADA LENBROOK INDUSTRIES LIMITEDLENBROOK INDUSTRIES LIMITED 633 GRANITE COURT, PICKERING, ONTARIO L1W 3K1 CANADA PHONE : 905 - 831 - 6333 F
11、AX : 905 - 831 - 6936 AUSTRALIAAUSTRALIA JAMO AUSTRALIA PTY LTDJAMO AUSTRALIA PTY LTD 1 EXPO COURT, P.O. BOX 350 MT. WAVERLEY VIC 3149 AUSTRALIA PHONE : +61 - 3 - 9543 - 1522 FAX : +61 - 3 - 9543 - 3677 THAILANDTHAILAND MRZ STANDARD CO., LTDMRZ STANDARD CO., LTD 746 - 754 MAHACHAI ROAD., WANGBURAPAP
12、IROM, PHRANAKORN, BANGKOK, 10200 THAILAND PHONE : +66 - 2 - 222 - 9181 FAX : +66 - 2 - 224 - 6795 TAIWANTAIWAN PAI- YUING CO., LTD.PAI- YUING CO., LTD. 6 TH FL NO, 148 SUNG KIANG ROAD, TAIPEI, 10429, TAIWAN R.O.C. PHONE : +886 - 2 - 25221304 FAX : +886 - 2 - 25630415 MALAYSIAMALAYSIA WO KEE HONG ELE
13、CTRONICS SDN. BHD.WO KEE HONG ELECTRONICS SDN. BHD. SUITE 8.1, LEVEL 8, MENARA GENESIS, NO. 33, JALAN SULTAN ISMAIL, 50250 KUALA LUMPUR, MALAYSIA PHONE : +60 3 - 2457677 FAX : +60 3 - 2458180 AMERICASAMERICAS SUPERSCOPE TECHNOLOGIES, INC.SUPERSCOPE TECHNOLOGIES, INC. MARANTZ PROFESSIONAL PRODUCTS 26
14、40 WHITE OAK CIRCLE, SUITE A AURORA, ILLINOIS 60504 USA PHONE : 630 - 820 - 4800 FAX : 630 - 820 - 8103 AUSTRALIAAUSTRALIA TECHNICAL AUDIO GROUP PTY, LTDTECHNICAL AUDIO GROUP PTY, LTD 558 DARLING STREET, BALMAIN, NSW 2041, AUSTRALIA PHONE : 61 - 2 - 9810 - 5300 FAX : 61 - 2 - 9810 - 5355 KOREAKOREA
15、MK ENTERPRISES LTD.MK ENTERPRISES LTD. ROOM 604/605, ELECTRO-OFFICETEL, 16-58, 3GA, HANGANG-RO, YONGSAN-KU, SEOUL KOREA PHONE : +822 - 3232 - 155 FAX : +822 - 3232 - 154 SINGAPORESINGAPORE WO KEE HONG (S) PTE LTDWO KEE HONG (S) PTE LTD WO KEE HONG CENTRE NO.23, LORONG 8, TOA PAYOH SINGAPORE 319257 P
16、HONE : +65 2544555 FAX : +65 2502213 NEW ZEALANDNEW ZEALAND WILDASH AUDIO SYSTEMS NZ WILDASH AUDIO SYSTEMS NZ 14 MALVERN ROAD MT ALBERT AUCKLAND NEW ZEALAND PHONE : +64 - 9 - 8451958 FAX : +64 - 9 - 8463554 RadioFans.CN 收音机爱 好者资料库 1 1. TECHNICAL SPECIFICATIONS FM TUNER SECTION FREQUENCY RANGE.87.5 -
17、 108.0 MHz USABLE SENSITIVITY . IHF 2.0 V/11.3 dBf SIGNAL TO NOISE RATIO . MONO/STEREO 70/65 dB DISTORTION . MONO/STEREO 0.3/0.5 % STEREO SEPARATION.1 kHz 32 dB A.C.S. 400 kHz 50 dB IMAGE REJECTION .98 MHz 40 dB TUNER OUTPUT LEVEL. 1 kHz, 75 kHz Dev 600 mV AM TUNER SECTION FREQUENCY RANGE. 520 - 171
18、0 kHz USABLE SENSITIVITY . LOOP 500 V/m SIGNAL TO NOISE RATIO . 40 dB DISTORTION .1 kHz, 30 % Mod. 1.0 % SELECTIVITY . 10 kHz 25 dB AUDIO SECTION RATED POWER. 20 Hz - 20 kHz 8 ohms 60 W/Ch THD.20 Hz - 20 kHz 8 ohms 0.09 % INPUT SENSITIVITY/IMPEDANCE LINEAR . 200 mV/47k ohms SIGNAL TO NOISE RATIO (IH
19、F-A) LINEAR . 95 dB OTHERS POWER SUPPLY.AC 120V 60 Hz POWER CONSUMPTION. 1.8 A DIMENSIONS (MAX) WIDTH . 17 - 5/16 inches (440 mm) HEIGHT. 5 - 3/8 inches (137 mm) DEPTH . 15 - 7/16 inches (392 mm) WEIGHT.16.5 lbs(7.5kg) Specifications subject to change without prior notice. RadioFans.CN 收音机爱 好者资料库 2
20、2. WIRING DIAGRAM 34 3. BLOCK DIAGRAM 56 4. SCHEMATIC DIAGRAM AND PARTS LOCATIONS MAIN SCHEMATIC DIAGRAM 78 MAIN BOARD Q329 Q381 Q382 Q385 Q384 IC51 Q501 Q411 Q412 Q315 Q309 Q307 Q311 Q394 Q303 Q396 Q305 Q319 Q313 Q330 Q321 Q325Q327Q323Q317 Q318 Q322 Q326Q328Q324 Q202 Q201 IC22 IC23 Q312 Q304 Q308 Q
21、314 Q316 Q310 Q320 IC21 Q413 Q415 Q414 910 FRONT SCHEMATIC DIAGRAM 1112 FRONT BOARD Q909 Q913 Q905 Q910 Q908 Q903 Q914 Q902IC02 Q915IC61 IC91Q911 Q905 Q912 Q904 Q901 Q907 1314 TUNER SCHEMATIC DIAGRAM 15 TUNER BOARD Q14IC2 Q16 Q15 Q17 IC1Q12Q11 IC5IC4 Q13 ANAM1313A FIP SEG-20 FIP SEG-19 FIP SEG-18 FI
22、P SEG-17 FIP SEG-16 FIP SEG-15 FIP SEG-14 FIP SEG-13 FIP SEG-12 FIP SEG-11 FIP SEG-10 FIP SEG-9 FIP SEG-8 FIP SEG-7 FIP SEG-6 FIP SEG-5 FIP SEG-4 FIP SEG-3 FIP SEG-2 FIP SEG-1 FIP QRID-1 FIP QRID-2 FIP QRID-3 FIP QRID-4 FIP QRID-5 FIP QRID-6 FIP QRID-7 FIP QRID-8 FIP QRID-9 NC -27V NC CLOCK DATA STB
23、 NC NC PLL-ST PLL-D/I PLL-CLOCK PLL-D/O NC KEY IN GND NC NC NC NC VOL-UP VOL-DOWN TUNING-UP TUNING-DOWN NC NC FUNCTION MUTE NC FIP SEG-21 FIP SEG-22 AREA OPTION NC RDS ON OPTION NC NC STANDBY OPTION MODEL OPTION NC POWER ON/OFF STBY LED NC NC NC NC NC NC VDD VSS BACK UP VDD VREF VASS VSS TUNED-IN ST
24、EREO-IN RDS CLOCK RDS DATA PROTECT -IN SP-2 SP-1 REMOTE IN REMOTE IN REMOTE OUT RESET X-OUT X-IN 16 5. MICROPROCESSOR DESCRIPTIONS 1. Block Diagram 2. Pin Configuration 17 3. Pin Functions PIN NO. SYMBOL DESCRIPTION 1VDD+5V POWER SUPPLY 2,4,5N.CNOT USED 3FUNCTION MUTEMUTING WHEN CHANGE THE FUNCTION
25、BUTTON 6TUNING DOWNINPUT OF ENCODER FOR TUNING DOWN 7TUNING UPINPUT ENCODER TUNING UP 8VOLUME DOWNOUTPUT TO CONTROL MOTOR VOLUME DOWN 9VOLUME UPOUTPUT TO CONTROL MOTOR VOLUME UP 10,11N.CNOT USED 12RDS DATATUNER RDS DATA OUTPUT 13RDS CLOCKTUNER RDS CLOCK OUTPUT 14STEREO-ININPUT FOR DETECTING FM STERE
26、O, ACTIVE LOW (0V) 15TUNED-ININPUT FOR DETECTING THE STATION IS DURING TUNING WHEN THE STATION IS DETECTED, ACTIVE LOW (0V) 16PROTECT-INSIGNAL INPUT FOR PROTECTION, ACTIVE LOW (0V) 1721KEY-INDATA INPUT FOR KEY SCAN 22,27VSSGROUND 23VASSGROUND 24VREFVOLTAGE FOR REFERENCE 25VDD+5V POWER SUPPLY 26BACK
27、UPIF PORT IS LOW, POWER IS OFFED AND LAST MOMERY IS ACTIVATED. 28,29N.CNOT USED 30GNDGROUND 31X-ININPUT FOR CRYSTAL OSCILATOR 32X-OUTOUTPUT FOR CRYSTAL OSCILATOR 33RESETOUTPUT FOR SETTING CPU, ACTIVE LOW (0V) 34REMOTE-OUTOUTPUT FOR REMOTE CONTROL DATA 35,36REMOTE-ININPUT FOR REMOTE CONTROL DATA 37SP
28、-1SWITING THE SPEAKER SYSTEM-1 OUTPUT 38SP-2SWITING THE SPEAKER SYSTEM-2 OUTPUT 39N.CNOT USED 40PLL D/OTUNER PLL IC (LC72131M) DATA-OUT PORT 41PLL CLOCKTUNER PLL IC (LC72131M) CLOCK PORT 42PLL D/ITUNER PLL IC (LC72131M) DATA-IN PORT 43PLL STTUNER PLL IC (LC72131M) CHIP ENABLE PORT 44,45N.CNOT USED 4
29、6STBSTROBE PORT FOR FUNCTION SWITCHING IC (LC78211) 47DATADATA PORT FOR FUNCTION SWITCHING IC (LC78211) 48CLOCKCLOCK PORT FOR FUNCTION SWITCHING IC (LC78211) 49,51NCNOT USED 50-27V-27V POWER SUPPLY FOR FIP 5260FIP GRIDPORTS FOR FIP GRID 6182FIP SEGMENTPORTS FOR FIP SEGMENT 83OPTIONAREA OPTION (“H” I
30、S EUROPE, “L” IS USA) 84OPTIONAREA OPTION (“L” IS EUROPE, “H” IS USA) 85OPTIONAREA OPTION (“H” IS EUROPE, USA “L” IS EXCEPT) 86N.CNOT USED 87OPTIONRDS OPTION (“L” IS RDS ON, “H” IS RDS OFF) 8890N.CNOT USED 91OPTIONSTANDBY OPTION (“L” IS STANDBY, “H” IS POWER ON DIRECTLY) 92OPTIONMODEL OPTION (“L” IS
31、 RECEIVER, “H” IS AMP) 93POWER ON/OFFWHEN THE POWER IS HIGH (5V), UNIT IS OPERATE 94STANDBY LEDINDICATING DURING THE STANDBY MODE, ACTIVE HIGH (5V) 95100N.CNOT USED 18 PIN20 PIN21 PIN19TAPE-MONIAUXFM/AMCDPHONO PIN17SEARCHDISPLAYPTY SELECT PIN18TUN/CH MODEP. SCANMEMORYFM MODETUNED-DN TUNED-UP I/O1 ko
32、hm1.5 kohm1.8 kohm2.7 kohm3.3 kohm Key Matrix IMPORTANT 1. Check power-source voltage. 2. Set the function switch to band aligned. 3. Keep the signal input as low as possible to adjust accurately. 4. Modulation and Modulation frequency. 6.MEASUREMENTS AND ADJUSTMENTS ALIGNMENT INSTRUCTIONS Equipment
33、 needed: AM Standard Signal Generator FM Standard Signal Generator Oscilloscope VTVM (AC, DC) AM Test Loop Antenna (AM Adjustment) FM Dummy Antenna (FM Adjustment) Stereo Signal Generator (RDS IN : EUROPE ONLY) Frequency Counter Distortion Analyser TUNER ADJUSTMENT POINT Modulation frequency 30 % MO
34、NO: 75 kHz DEV. (100 %) STEREO: L=R (67.5 kHz), PILOT (7.5 kHz) Item Band FM 1 kHz Modulation AM400 Hz (4)FM MONO DISTORTION ADJUSTMENT Signal Generator -Connect to FM Ant. (FM 75 ohm) through the dummy. DC Voltmeter - Connect to TP2(+), TP3(-) through the choke coil (100mH) Distortion Meter -Connec
35、t to output L or R Band Step Frequency Adjust forAdjustment 1100.50 MHz DC Volt 0VT11 2100.50 MHz Minimum T.H.DT12 3Repeat steps 1 and 2 several times FM (3)FM RF ADJUSTMENT Signal Generator -Connect to FM Ant. (FM 75 ohm) through the dummy. Adjust for indication of VTVM of the wave form of scope to
36、 be maximum. (7)AM, FM AUTO STOP LEVEL ADJUSTMENT Signal Generator -Connect to FM Ant. (FM 75 ohm) through the dummy. -Connect to the AM Ant. Coil through the loop antenna. BandStepFrequency and Level Adjust forAdjustment 1100.50 MHz, 30 dBDisplay offVR1 2100.50 MHz, 30 dBDisplay onVR1 1 990 kHz, 80
37、 dBDisplay offVR2 2 990 kHz, 80 dBDisplay onVR2 FM AM TUNED TUNED TUNED TUNED (1)FM, AM TRACKING VOLTAGE ADJUSTMENT AM, FM DC Voltmeter - Connect to test point TP1 and GND (2)AM RF ADJUSTMENT Signal Generator -Connect to the AM Ant. Coil through the loop antenna. Adjust for indication of VTVM of the wave form of scope to be maximum. (5)FM MPX VCO ADJUSTMENT Signal Generator -Connect to FM Ant. (FM 75 ohm) through the dummy. 190.10 MHzMaximum sens. L2, L5, L6, T1 2Repeat step 1 several times Band Step Frequency Adjust forAdjustment FM (6)FM STEREO SE
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