Technics-SL1600-tt-sm 电路图 维修手册.pdf

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1、ORDER NO. SD7702-1182 Direct drive automatic Turntable System Specifications Turntable section Type: Drive method: Motor: Turntable platter: Turntable speeds: Pitch controls: Wow and flutter: Rumble: Specifications are subject t o change without notice for further improvement. Weights and dimensions

2、 shown are approximate. Direct Drive Automatic Turntable System, Automatic start, Automatic return, Automatic shut-off and MEMO-REPEAT play Manual play Direct Drve Back Electromotive Force Frequency Generator servo DC motor employing one chip IC Alurrinum die-cast, 33 cm (13) 33-113 and 45 r.p.m. In

3、dividual adjustment controls. 10% adjustment range 0.025% W.R.M.S (JIS C5521) k0.035% Weighted zero to peak (DIN 45507) -50 dB (Dl N 45539A) -73 dB (DIN 45539B) Tonearm section Type: Universal tubular arm, staticbalanced type Effective length: 230 m m (9-1/16,) Overhang: 1 5 m m ( 19/32) Friction: 7

4、 mg (horizontally and vertically) Effective mass: 22 g (6.0 g cartridge weight 1.75 g stylus pressure) Tracking error angle: Within +3O at the point of 145 mm (5-45164) from the center i within +lo at the point of 55 m m (2-311 6) from the 1 center Offset angle: 21.5O Adjustable stylus pressure rang

5、e: I I 0 to 3 g (stylus pressure direct reading tv pe) Cartridge weight range: 5 t o 11 g Head shell weight: 9.5 g General Power supply: AC 1 2 0 V . 5 0 o r 6 0 H z Power consumption: 6 W Dimensions: 12.5 x 45.3 x 36.9 cm ( H x W x D ) 14-15/16 x 17-12/16 x 14-9/16 inches) Wegiht: 9.0 kg (1 9.8 ibs

6、.) Panasonic Company Matsushita Electric of Hawaii, Inc. Matsushita Electric of Canada Ltd. Technics Division of Matsushita Electric 320 Waiakarrilo Road, Honolulu, 40 Ronson Drive, Rexdale, Corporation of America Hawaii 96817 Ontario, Canada M9W 1 B5 One Panasonic Wav. Secaucus, bypanasonic New Jer

7、sey 07094. RadioFans.CN 收音机爱 好者资料库 Parts identification Output terminals Hinge Pitch control knobs 1 1 Turntable base Fig. 1 Assembly and set-up Apply two or three drops of oil to the motor shaft using the furnished oil container. (See Fig. 2) Although the unit has been lubricated before shipping fr

8、om the factory, apply a few drops of oil to the motor shaft for assurance. After that, application of two or three drops of oil once every 2000 hours operation or so is sufficient. The time interval is much longer than that of the former type motors (200 - 500 hours), so do not apply too much oil, n

9、or more frequently than necessary. Never use any other type of oil. . (1) For removal of the cover, take off 4 vis-screws from the panel cover. (2) Draw out three connectors. (3) For separation of the body from the main base, turn the cueing lever upward, move the tone-arm in inboard direction, then

10、 lift up the body. Note: The turntable horizontaliy to the panel face is already adjusted before shipment. If deviated, correct it by means of the adjust screws using a 5mm box spanner. 1. Remove the cartrige. 2. Fix the tone arm to the arm rest. 3. Remove the turntable. 4. Turn the player set upsid

11、e down with good care not to damage the acryl cover. 5. Take off 4 vis-screws from the back panel. 6. Place the player set face upward holding it with both hands so that the body is not separated from the main body. 121 SL-1600 Turntable base Main base RadioFans.CN 收音机爱 好者资料库 H Adjustments Adjustmen

12、t of the arm lift height (See Figs. 4 and 5) The arm lift height (distance between the stylus tip and record surface when cueing lever is raised) has been adjusted at the factory before shipping to ap- proximately 5 to 10 mm (311 6 to 25/64). If the clearance becomes too narrow or too wide be- cause

13、 of the physical size of the different cartridges on the market turn .the adjustment screw clockwise or counterclockwise, at the same time pushing the arm lift down. Clockwise ratation -distance between the record and stylus tip is reduc- ed. Counterclockwise rotation -distance between the record an

14、d stylus tip increases. Note: As the adjusting screw has a hexagon head, be sure to make the adjustment while depressing the arm lift. Adjustments for automatic start and automatic return positions (See Fig. 6) Should the tonearm not function correctly, make adjustments according to the follwing pro

15、cedures. Adjustment for automatic start position (Remove the rubber cap.) In cases where the styls tip descends outside of the record. - Move C O C K W S . In cases where the styus tip descends onto halfway of a recorded piece. - Move counterclockwise Adjustment for automatic return posittion (Remov

16、e lrntable sheet.) n cases where the tonearm tends to retclrn befor the playing has finished. - Move clockwise. In cases where the tonearm fails to return after the last groove of the record. - Move counterclockwise. Speed adjustment (with pitch control knobs) (See Figs. 7.8 and 9) Strobe dots are s

17、et on the tapered rim of the turn- table platter according to the power frequency and the number of revolutions of the records. Make adjustment, referring to strobe dot indication. (See Fig. 7) 1. Set the speed selector to the number of revolutions to be adjusted. (See Fig. 8) 2. Release the arm cla

18、mp and raise the cueing lever 3. Move the tonearm to a slight extent towards the turntable platter. The strobe illuminator/pilot lamp will be lit for it- luminating the strobe dots. 4. While turning the pitch control knobs either to + side or - side, adjust to such an extent that the strobe dots of

19、the turntable look as if they were stationary. RadioFans.CN 收音机爱 好者资料库 The state under which the strobe dots seem to be power source affects the strobe illuminator, the strobe stationary represents the correct number of revolu- dot pattern also seems to fluctuate to a certain extent. tions. But the

20、unit is not affected by -the fluctuations of the + direction power source, since a D.C. motor is employed. This increases the speed of the turntable rota tion, and 5, If the desired speed can not be obtained by the variable the strobe dot pattern seems to flow in the same pitch controls, turn the sp

21、eed adjusting screws with a direction as the rotational direction of the turntable screw driver for further adjustments. (See Fig. 9) platter. - direction This decreases the speed of the turntable rotation, resulting in a state opposite to that in the + direc- tion. Note: Strobe dot pattern. The str

22、obe illuminator/pilot lamp of this unit employs the commercially available power source. The frequency of such power source, when actually measured, has a fluctuation of about 0.2%. As such a fluctuation of the Cross section of motor portion and double insulator Motor shaft (Center spindle) Position

23、 detecting rotor Tonearm Turntable mat Dust cover Stator I Position detecting coil I I- Main base tator frame V isco-elastic material Operation principles of the SL-1600 Arm base This unit, like the SL 1300 has a rational motor structure, and its drive control circuit is the B.F.G. type (Back TECHNI

24、CAL EXPLANATION electromotive force frequency generator) which is constructed on a single integrated circuit (IC) chip (AN630). The following is a block diagram of the IC (AN6303 for which the operating principle will be briefly explained Operating principle The back electromotive force, which is ge

25、nerated by the drive coil winding according to the rotation of the motor, is detected and converted to a frequency signal that is proportional to the numder of revolutions. Conversion is performed by a wave-shaping circuit and a logic circuit (This is referred to as the B.F.G. method). This frequenc

26、y signal is compared with a standard signal by means of a frequency-voltage conversion circuit which converts it to a voltage signal in order maintain a constant number of revolutions. After removing un- necessary frequency components, with -the operational-amplifier active filter, from this voltage

27、 signal, it controls the cur- rent flow in three differential switching circuits. As a result, the flow of current in the drive coil winding is always constant maintaining the correct rotational spe- ed. Control of the rotational speed can be performed by means of adjusting the standard signal gener

28、ator circuit according to the rotational speed adjustment cricuit. Explanation of each part 1. B.F.G. METHOD (BACK ELECTROMOTIVE FORCE FREQUENCY GENERATOR) Making use of the back electromotive force that is generated in the drive coil winding of the motor as a frequency generator, the frequency of t

29、he frequency generator is converted to the number of revolutions for the turntable. After shaping the wave form of this back electromotive force, it is composed logically, and a frequency is generated that is proportional to the number of revolu- tions. This is the use of the B.F.G. Making use of th

30、e drive coil winding, frequency generator coil windings and magnets are not necessary, yielding a motor struc- ture that is very compact. 2. FREOUENCY-VOLTAGE CONVERSION CIRCUIT Being composed of a trapezoidal wave generating circult. a pulse generating circuit and a sampling integration cir- cuit,

31、the B.F.G. output frequency is converted to a vol- tage, and control output voltage is generated in order to maintain the rotational speed of the turntable at a cons- tant level. Block diagram 3. OPERATION CONTROL CIRCUIT The operation control circuit functions as a control out- put voltage control

32、keeping the rotational speed of the turntable constant with regard to the start of turntable operation and the operation of the mechanism. With this circuit, transient response characteristics and start- ing characteristics are very good. 4. OPERATIONAL AMPLIFIER (OP AMP) ACTIVE FILTER Because of us

33、ing an operational amplifier in the active filter, an ideal filter operation is possible. As a result, such high performance as a signal-to-noise (SN) ratio of 60 dB (I EC-B) and a wow-and-flutter level of 0.03% (WRMS) have been achieved. 5. DRIVE CIRCUIT By incorporating a large copacity power tran

34、sistor in the integrated circuit, a starting torque of 1 kg-cm can be obtained. By means of this large starting torgue, prompt starts have been realized. 6. THREE DIFFERENTIAL SWITCHING CIRCUITS By means of the signal from the position signal coil, the starting circuit power transistor selector oper

35、ates, obtaining smooth rotation. Schematic Di agra (This schematic diagram may be modified at any time with the development of new technology) _ - - - - - - - - - - - - - AC IZOY I I - SVDMI-152 I RECT AN630 NOTES: RECT 1. S1: Power swltch 1 s off position. 2. S2-1, S2-2: Speed selector swltch IS 33

36、-1/3 r.p.m position. 3. The voltage values entered are the values measured from the chassls with a standard tester that has an internal resistance of 100Kfl/V at a rotational speed of 33-1/3 r.p.m. Circuit Board Wiring View POWER SWITCH EXPLODED VIEW OF TURNTABLE EXPLODED VIEW OF TURNTABLE H REPLACE

37、MENT PARTS LIST ECEA50ZR22 ECQMlH104KZ ECEA50ZR33 ECEA50M2R2R ECEA50MR33R ECQM1 H472KZ ECQMlH223KZ ECQM1 H823KZ ECQFlA473MD ECQUlA473MC table Mat, Set for MC SFTE170-01A SFNN 16OMO1 Name Plate, Set for MC Clarnper, AC Power Cord Spacer. AC Power Cord ERD25TJ330 ERXIANJ2R7 2.7R. 1W. k 5%. Metallic ER025CKF3902 39KR. 1/4W. L 1%. Metallic ER025C KF6202 68KR. 1/4W. * 1%. Metallic ERD25TJ473 47KR. 1/4W, * 5%. Carbon ERD25TJ124 120KR. 1/4W. * 5%. Carbon ERD25TJ563 56KR. 114W. * 5%, Carbon ERD25TJ102 1KR. 1/4W. * 5%. Carbon ERXlANJlR5 1.5R. 1W. * 5%. Metallc