Marantz-ST440-tun-sm 电路图 维修手册.pdf

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1、EINGEGAN6Eti 2 p. Mrt 1985. MANUAL 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 s

2、pecifications 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 telex. ln both cases, MARANTZ part number has to be specified. If you arder by mail, fulfil MARANTi ar

3、der forms. MARANTZ S.A. EUROPEAN PARTS DEPARTMENT 2, Avenue Lopold Ill SUPERSCOPE NATIONAL PARTS DEPARTMENT 20525 Nordhoff Street Chatsworth, California 91311 B-7120 PERONNES-lez-BINCHE BELGIUM Phone: 1-800-423-5108 Phone: 1-213-998-9333 TWX: 57589 SEPL T 8 The following information must be supplied

4、 to eliminate delays in processing your order: 1. Complete address 2. Complete part numbersand quantities required 3. Description of parts 4. Madel number for which partis required 5. Way of shipment 6. Signature: any arder form or telex must be signed otherwise such part order wrll be considered as

5、 null and void. PARTS ORDERING: Parts may be ordered from the following addresses: EUROPE MARANTZ S.A. MARANTZ DENMARK MARANTZ BELGIUM European Parts Department Bregnerllldvej 132b 45 Rue Auguste Van Zande 2. Avenue Lopold Ill 3460 Birkeqild 1080 Brussels B-7120 Pronnes-lez-Binche Denmark Belgium Be

6、lgium Telex: 39137 Telex : 57589 MARANTZ S.A. MARANTZ FRANCE MARANTZ SVENSKA A.B. 326 Avenue Louise Bte 32 4 Rue Bernard Pal issy Svartvi ksvagen 56 1050 Bruxelles 92600 Asnires Traneberg Bromma Belgium France Sweden Telex: 26602 Telex: 611651 Telex : 13449 MARANTZ AUDIO U.K. L TO. Unit 15/16 AUSTRA

7、L! A Saxon Way 1 ndustrial Esta te Moor Lane Harmondsworth UB7 OLW Great Britain Telex: 935196 MARANTZ AUSTRALIA lTV., L TD. 19 Chard Road Brookvale, NSW 2100 Australia Telex : 24121 MARANTZ NEDERLAND B. V. Wagenmackersweg 3 3449 H.V. Waerden Netherlands MARANTZ ITALIANA S.p.A. Via Monte Napoleone,

8、10 20121 Milano ltalia U.S.A. MARANTZ COMPANY, INC. National Service Dept. P.O. Box 577 Chatsworth, CA 91311 U.S.A. Tel ex: 4 720284 MARANTZ AUSTRIA Ge.M.B.H. 25 Franz Lisztgasse 2380 Perchtoldsdorf Austria Telex: 113583 MARANTZ GERMANY G.M.B.H. Max-Pianckstrasse 22 6072 Dreieich 1 German y Telex: 4

9、185316 JAPAN MARANTZ JAPAN, INC. 35-1. 7 -chome, Sagamiono Sagamihara-shi, Kanagawa Japan Telex: 22878 Ali of the above locations are fully equipped to take care of your total service needs. Because various countries have differing configuration requirements, it is necessary th at y ou contact the s

10、ervice facility in y our particular country. ln the event that there is np service location listed for y our country, please, contact the nearest facility for the necessary assistance. NOTE-FOR U.S.A. ONL Y ln case of difficulties, do not hesitate to contact the Technical Department at abovementione

11、d address. Parts for your MARANTZ stereo are generally available within 72 hours throughout the nation via a toll-free line to our National Parts Depot in California. The sales professionals who take your cali immediately refer to their own desk top computer terminal and can quickly determine the av

12、ailability and priee information you require. If, for sorne reason, your arder should exed our available stock, we usually can instantly provide an alternate replacement part or current delivery information. When the arder is placed and confirmed, the computer simultaneously generates hard copy orde

13、rs at the distribution center. As hard copies come directly from the computer to the national parts depot, your requested stock is assembled and prepared for shipment and placed on the first available carrier for delivery to you. Phone orders will eliminate mail delays, and we encourage the use of t

14、his method. If you arder by mail, use MARANTZ parts arder forms which are available from SUPERSCOPE NATIONAL PARTS DEPARTMENT . ._ . ._ . z RadioFans.CN 收音机爱 好者资料库 SECTION INTRODUCTION TABLE OF CONTENTS PAGE 1. SHOCK, FIRE HAZARD SERVICE TEST . 1 2. P.W. BOARDS . 1 3. TEST EQUIPMENT REQUIRED FOR SER

15、VICING . 2 4. TUNER ALIGNMENT PROCEDURES . 2 5. TEST POINT AND ALIGNMENT POINTS . 4 6. CIRCUIT DESCRIPTION . 5 7. VOLTAGE CONVERSION . 8 8. BLOCK DIAGRAM . 9 9. SCHEMATIC DIAGRAM AND COMPONENT LOCATIONS . 10 9.1 Power Switch Assembly (PUOO) Schematic Diagram and Component Locations . 10 9.2 Preset K

16、ey Switch Assembly (PSOO) Schematic Diagram and Component Locations . 10 9.3 Tuner Assembly (P100) Schematic Diagram and Component Locations . 12 10. EXPLODED VIEW AND PARTS LIST . 18 11. ELECTRICAL PARTS LIST . 20 12. TECHNICAL SPECIFICATIONS . 24 13. SCHEMATIC DIAGRAM . 26 RadioFans.CN 收音机爱 好者资料库

17、MODEL ST440/ST440L STEREOPHONJC TUNER INTRODUCTION This service manual was prepared for use by Authorized Warranty Stations and contains service inlbrmation for the Marantz Mode! ST440/ST440L Stereophonie Tuner. Servicing information and voltage data included in this manual are intended for use by k

18、nowledgeable and ex- perienced personnel only. Ali instructions should be read carefully. No attempt should be made to proceed without a good understanding of circuitry operation. The parts list furnishes complete ordering information. Most replacement parts should be ordered from the Marantz Compan

19、y. However, a simple description is in- cluded for parts which can be obtained locally. 1. 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

20、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 orcorrected before AC power is applied, and verified before return to user/customer. Ref. U L Standard No. 1270. Par

21、a. 66. 3. D (Mandatory Test after servicing Electrical Appliances, effective 7-1-88). 2. P.W. BOARDS As can be seen from the circuit diagram the chassis of Mode! ST440/ST440L consists ofthe following units. Each unit mounted on a printed circuit board is described within the square enclosed by a bol

22、d dotted line on the circuit diagram. 1. Tuner . mounted on P.W. Board P100 2. Preset Key Switch . mounted on P.W. Board PSOO 3. Power Switch . mounted on P.W. Board PUOO 3. TEST EOUIPMENT REOUIRED FOR SERVICING Item Use AM Signal Generator Signal source for AM alignment Test Loop Use with AM signal

23、 generator FM Signal Generator Signal source for FM alignment MPX Signal Generator Stereo separation alignment and trouble shooting Distortion Analyzer Distortion measurements Audio Oscillator Sinewave and squarewave signal source ACVTVM Voltage measurements (AC) Oscilloscope Waveform analysis and t

24、rouble shooting and ASO alignment Frequency Counter MPX oscillator adjustment (VCO) Circuit Tester Trouble shooting DCVTVM Voltage measurements (OC) AC Wattmeter Monitors primary power to tuner Line Voltmeter Monitors potential of primary power to tuner Variable Autotransformer (0 140V AC, 10A) Adju

25、sts level of primary power to tuner 4. TUNER ALIGNMENT PROCEDURES A dummy resistor of 47 kohms must be connected across the tuner output terminais before alignment. 4.1 FM Alignment Procedures (Function switch in the FM position, MODE switch in the MONO position.) 1. FMRFAiignment Step Signal Source

26、 Signal lndicator Set the Digital Adjust: Connection Frequency Connection Readout Frequency FM signal generator to FM antenna terminal (300nl through matching network VTVM to Lor R FRONT END IFT(L8)for 1 Set the SG RF output 98.00 MHz chnnel output 98.00 MHz maximum output and level so that sorne no

27、ise can be observed on the (J102) minimum distortion. upper and lovver side of the output waveform. FM signal generator 1 mV output to FM antenna 0 center meter terminal (300nl through or OC current meter L201 (Primary) core so 2 matching network 98.00 MHz in 100 1-1A range 98.00 MHz th at the meter

28、 ind ica tes its Modulation Level between center or may read 0. DIN 40kHz DEV. (J201, J202) IHF 75kHz OEV. FM signal generator 1 mV Distortion meter to L201 (Secondary) core 3 output to FM antenna 98.00 MHz L or R channel output 98.00 MHz for minimum distortion. terminal (300n) through matching netw

29、ork. (J102) 2 4.2 Muting Level Alignment (Function switch in the FM position, MODE switch in the AUTO STEREO position.) Step Signal Source Signal lndicator Set the Digital Adjust: Connection Frequency Connection Readout Frequency FM signal generator 12.5JV output to VTVM to Lor R 1 FM antenna termin

30、al 98.00 MHz channel output 98.00 MHz Adjust R216 until through matching (J102) output is developed. network (300 ohm, balanced) 4.3 Multiplex Alignment Procedures (Function switch in the FM position, MODE switch in the AUTO STEREO position.) Step Signal Source Signal lndicator Connection Frequency

31、Connection FM signal generator F requency counter 1 1 mV output modulated No modulation to (J301 l by MPX signal generator to FM antenna terminal Stereo left VTVM to right (30011) through 2 matching network (1,000 Hz) channel output Modulation Leve! (J102 R ch) OIN 40 kHz+8% Pilot OEV. VTVM to left

32、3 IHF 67.5kHz+9% Pilot OEV. Stereo right channel output (1,000 Hz) (J102 Lch) 4.4 AM Alignment Procedures (Function switch in the AM position.) 1. AM 1 F Alignment Step Signal Source Signal lndicator Connection Frequency Connection 1 Sweep generator to 450 kHz marker Oscilloscope to AM Antenna Termi

33、nal. (JA01) 2. AM Local Oscillator Alignment Step Signal Source Signal lndicator Connection Frequency Connection OC voltmeter in 1 -3V range to (J501, J502) 3. AM RF Alignment Step Signal Source Signal lndicator Connection Frequency Connection 1 Apply the signal to the 603kHz AM loop antenna from (6

34、00kHz) VTVM to Lor R the AM signal generator channel output 2 using the test loop. 1,404 kHz (J102) (1,400 kHz) 3 Repeat steps 1 and 2. Set the Digital Readout Frequency 98.00 MHz Set the Digital Readout Frequency - - - Set the Digital Readout Frequency 522kHz (520kHz) Set the Digital Readout Freque

35、ncy 603kHz (600kHz) 1.404 kHz (1,400 kHz) 4. LW Local Oscillator Alignment (Function switch in the LW position) ST440L Only Step Signal Source Signal lndicator Set the Digital Connection Frequency Connection Readout Frequency OC voltmeter in 1 3 V range to 153kHz (J501, J502) 3 Ad just: R303 so that

36、 Frequency may precisely read 19,000 kHz 10 Hz R317 or same separation in both channels. Ad just: LAOS for maximum and symmetric response. Ad just: LA01 for 1.0 V Ad just: LA03 for maximum output. CA01-1 for maximum output; Ad just: LA02 for 1.5 V. 5. LW RF Alignment (Function switch in the LW posit

37、ion) ST440L Only Step Signal Source Signal lndicator Set the Digital Adjust: Connection Frequency Connection Readout Frequency 1 Apply the signal to the 270kHz 270kHz CA29-2 for VTVM to Lor R maximum output. AM loop antenna from the channel output RF generator using the (J104) LA04 for 2 test loop.

38、170kHz 170kHz maximum output. 3 Repeat steps 1 and 2 as necessary to obtain maximum sensitivity. 6. AM Signal Alignment (Function switch in the AM position) Step Signal Source Signal lndicator Set the Digital Ad just: Connection Frequency Connection Readout Frequency Apply a signal to the Adjust RA1

39、4 so that 1 AM loop antenna from the 999kHz -999kHz RF generator via the test 5 signal LEDs light. test loop. 5 mV signal 5. TEST POINT AND ALIGNMENT POINTS 4 6. CIRCUIT DESCRIPTION TC9158P C-MOS DigitaiiC Silicon Monothilic 1. Dynamic Driver TC9158P (OS01) for indicating reception frequencies TC915

40、8P is a driver for indicating reception frequencies developed for use in DTS-6/8. The driver latches seriai data transfered from system controller LSI, computes and corrects intermediate frequency, and indicates data. With built-in driver, there is no need for additional transistor. Maximum Ratings

41、(Ta=25C) Characteristic Supply Voltage Input Voltage Output Voltage Output Current (Note) Power Dissipation Operating Temperature Storage Temperature Block Diagram ose DATA CK-1 CK-2 voo GND DECORDER COUNTER Symbol Ratings Unit Voo 7 v viN -0.3 V DO+ 0.3 v VoL loH Po Topr Tstg Tz T3 T4 DIGIT OUTPUT

42、GENERATOR CIRCUIT Voo -35 v 50 mA 350 mW -30 75 oc -55 125 oc A 8 c MULTIPLEXER INDICATION REGISTER D BINARY TO BCD/IF OFF SET/MARK DATA ROM 5 Pin Connections GND voo ose Tl DATA T2 CK- 1 T3 CK-2 T4 G T5 F A E 8 D c E F G LATCH Pin Description Pin No. Na me Functional Description Remarks 2 ose One-t

43、erminal oscillation-circuit input terminal for digit signal output. 3 DATA Receiving frequency data signal input. CK-1 4,5 CK-2 Timing clock signal input. Input circuit 6 12 AG Segment drive signal output. Built-in high pressure-resistant 13 17 T1 T5 Digit signal output terminal. transistor. 1, 18 V

44、oo Power supply GND. GND Electrical Characteristics (Unless otherwise specified, V00=5V, Ta=25C) Characteristic Symbol Test Circuit Test Condition Min. Typ. Max. Unit Operating Supply Voltage Voo -Ta=-30 75C 4 5 6 v Operating Supply Current loo - No load tose=50kHz -0.2 1.0 mA H Level ViH - DATA, CK

45、-1, eK-2 4.0 -5.3 v Input Voltage L Level ViL - DATA, CK-1, CK-2 -0.3 -1.0 v H Level IIH - DATA, CK-1, CK-2, ViW5V -1 p. A Input Current L Level IlL -DATA, eK-1, CK-2, V1L=OV - 1 p. A Timing Input Frequency fopr - DATA, CK-1, CK-2 -25 100 kHz OSe Oscillation Frequency tose -Rx=24KU, Cx=1200pF -50 -k

46、Hz T1 Ts. Vow3V 3 5 -mA Output Current loH 1 AG. VoH=3V 10 15 -mA Leak eurrent loL - T1 T5, A G, VoL =-27V -10 p. A 6 2. Function If reception frequency is renewed by system controller LSI, timing signais indicated below and seriai data are transferred by one cycle only. CK-1 CK-2 DATA START SIGNAL 2.1 Data signal FREQUENCY DATA SIGNAL 1 CYCLE= 1.8 ms RECEPTION BAND SIGNALS Data signal is composed of 17 bits, of which 12