RCA-Victor-Co-Inc-V-201 电路原理图.pdf

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1、PAGE 726-C RP -152, RP -153 RP -155 and Automatic Record Changers RP -157 RP vs. MODEL NUMBERS MODEL NO. RP NO. MODEL NO. RP NO. MODEL NO. RP NO. Q(,l-7 v A-15 Qu-51m8QUe5 QU-52C QU-52M V-170 RP -157 RP RP -52R RP -152S RP -152R RP -152 V- 200 V-201 vu -202 V -2o5 V -205A UR -207 RP -152A RP -152A R

2、P -155 RP -1523 RP -153 RP -155 V-3oo V- 30 1 V -3o2 VHR-3o7 V -4o5 VHR-4o7 RP -152J RP -153 RP -153 RP -155 RP -152J RP -155 RP -I55 AND RP -I57 ARE EQUIPPED FOR HOME RECORDING, OTHERWISE SIMILAR TO RP -I53 RECORDS SPINDLE RECORDPOLDER POST RECORD -HOLDER SHELF TURNTABLE WITH RECORD IN PLACE NEEDLE

3、 SCREW 12 INCH NEEDLE HOLE IO INCH MANUAL RECORD -MOLDER SHELF The RP -152 and RP -153 automatic record changers are very similar in design and construction. Most of the parts and adjustments are identical on both. The RP -153 turn table is driven through a worm gear in the motor housing while the R

4、P -152 turntables are driven through a friction drive disc mounted under the turntable. On Models RP -152 it is important that the drive motor spindle, and rubber tires on main driving disc and idler pul- ley be kept clean and free from oil, grease, dirt, or any foreign matter at all times. Any quic

5、k -drying naphtha is satis- factory for cleaning these parts. The drive motor bearing is lubricated from an oil well filled and sealed at the factory. It should not require lubrication in the field. The rubber -tired drive disc on Models RP -152 is not re- movable from the spindle. The turntable is

6、fastened to the driving disc by three bolts. If necessary to remove these parts the spindle drive gear set screw should first be removed. The driving disc, turntable and spindle assembly can now be lifted upward from the motorboard. If this is done, great care should be taken not to bend the spindle

7、. To remove the turntable and spindle on the RP -153 type it is necessary to first remove the tapered pin in the turntable drive arm assembly. The turntable and spindle can then be drawn up through the motorboard bearing. Before servicing the automatic record changer, inspect the assembly to see tha

8、t all levers, parts, gears, springs, etc., are in good order and are correctly assembled. A bind or jam in the mechanism can usually be relieved by rotating the turntable in the reverse direction. The changer can be conveniently rotated through its change cycle by pushing the index lever to Reject a

9、nd revolving the turntable by hand. Six turntable revolutions are required for one change cycle. A pickup shorting switch, located under the motorboard, operates when the pickup is moved outward to the pickup rest. RECORD -HOLDER POST PICKUP -ARM PICKUP INDEX AND RECORD REJECT LEVER EXTENSION POST N

10、EEDLE BOX HOLDER NEEDLE GAUGE PLATE PICKUP SUPPORT PLATE TURNTAELE SWITCH REJ ECT The 10 and 12 -inch records must be absolutely flat for smooth operation. When a record has been played the pickup moves out, another record is dropped down, and the needle is fed auto- matically into the starting groo

11、ve of this record. If the needle fails to enter the starting groove, raise the right-hand side of the cabinet by inserting thin spacers under the feet on that side. If the needle slides over a few grooves, raise the left-hand side of the cabinet in a similar manner. Cycle of Operation In automatic o

12、peration (index lever set to 10 or 12), when the pickup needle enters the eccentric or spiral groove at the inside of the record, the pickup arm swings in the groove, and this motion acts through a friction clutch to trip or start the cycle of the automatic record changer mechanism which: 1. Lifts u

13、p the pickup arm and swings it out clear of the records. 2. Turns the two record -holder posts, each of which has a knife and a shelf: The knives enter between the bottom record and the rest of the stack. Continuing to turn, the shelves move from under the bottom record and it drops on the turntable

14、, while the rest of the stack of records are sup- ported by the knives. 3. The pickup arm is then moved to correct position and lowered on the record, while - 4. The recordholder posts are turning back to their original positions, so that the records rest on the shelves, and the knives are in correc

15、t position to separate the next record from the stack. The cycle is completed when the pickup comes down on the record. The pickup arm should not be moved while in cycle. RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U. S. A. 收音机爱 好者资料库 RadioFans.CN Cautions RP -152, PAGE 727-C

16、RP -153, RP -155, RP -157 1. This instrument is not recommended for playing 10 -inch and 12 -inch records in mixed sequence. 2. Never use force to start or stop the motor or any part of the record -changing mechanism or pickup arm. 3. Warped or damaged records may cause the mechanism to jam. 4. Warp

17、ed records may slide on one another when playing, resulting in unsatisfactory reproduction. 5. Do not leave records on the record -holder posts as they may warp, particularly in warm climates. Warped records may be flattened by placing them on a flat surface with a flat heavy article placed on top o

18、f them for a few days. 6. Do not leave pickup needle resting on a record or on the turntable. Always place it on the pickup rest. 7. Do not insert a used needle in the pickup, and avoid turning a needle after it has been used. 8. If for any reason the phonograph stalls, turn off the turntable switch

19、 and remove the records from the record holder shelves. Start the turntable and allow the pickup arm to complete its cycle. RCA VICTROLA MECHANISM DATA RP -152, RP -153, RP -155: The following changes have been made in these Record Changers: (a) Removal of Trip Regulator Lever (Part 21). (h) Removal

20、 of Pin 1 on Trip Lever Friction Finger (Part 7). (c) Repositioning of Stop Pin 2 from position A to position B. (d) Removal of Pin 3. Since this pin does not interfere with the operation, it has beer left in some mechanisms. 21 PIN j PIN 1 O. PIN2 A oB PIN 4 PICKUP ARM, S Trip Regulator Lever (21)

21、is Removed in Some Production. The Trip Regulator Lever was formerly used to prevent premature tripping due to a too early return of the Trip Lever Friction Finger at the end of each changing cycle. The same result is obtained by removing the Trip Regulator Lever and repositioning the Trip Finger St

22、op Pin as shown in the diagram. Binding or Hesitation of Tone Arm: This may be due to the following causes: (1) Small burr on edge E. Correction: Carefully remove burr with a fine file until edge is entirely smooth. (2) Binding of Pin 4 between edges E and F. Correction: File off edge F with a fine

23、file to give just enough clearance for smooth operation. (3) Too far an outward swing of the Pickup Arm. This causes Pin 4 to be caught in the upper curved portion of edge F. Correc- tion: On some models the Pick-up Arm Shaft can be rotated by loosening the nut under the motor board. Rotate sufficie

24、ntly to prevent Pin 4 from riding into curved portion mentioned, when Pick-up Arm is in the outermost position. On models where the Pick-up Arm Shaft is positioned by a locating key, it is neces- sary to bend Stop Guide S on Pick-up Arm towards Stop Ear P on Pick-up Arm Shaft so that the condition m

25、en- tioned in the above paragraph is obtained. RP -152 SERIES No. 38304 Spindle Bearing and Washer: The turntable spindle bearing and washer for the RP -152 Series automatic record changer mechanism, used in Models VA -15, V-170, V-200, V-201, V-205, V-300, and V-405, are now stocked as No. 88304. F

26、LOCK FOR RP -152 TURNTABLE Dark taupe colored flock is available as Stock No, 37952 a lb. package) for turntable repair on RP -152 series record changers used in Models V-170, V-200. V-201. V-205. etc- The method of applying the flock is described on page 12 of the 1538 Bound Volume. RP -152 RECORD

27、CHANGER REPLACEMENT OF RUBBER TIRES Stock No. 37873 Rubber Drive Tire On Turntable Drive Discs: 1. Remove old tire by stretching and pulling over drive disc edge. 2. Thoroughly clean drive disc to remove burrs or foreign particles. 3. Place new tire over the drive disc. Avoid any twisting or excessi

28、ve stretching of the tire. 4. Roll disc and tire on a flat clean surface while simultaneously applying a slight down- ward pressure on the disc shaft. This will allow the tire to seat itself properly in the V shaped groove on the drive disc and take up for any uneven stretching of the rubber tire. 5

29、. Clean rubber tire with carbon tetrochloride (Carbona), Centering Motor: Should centering of the rotor be necessary, it may be accomplished quickly in the follow- ing steps: (a) Remove the two long machine screws, and lift off plastic end cover. (b) Loosen the two remaining screws suffi- ciently to

30、 permit adjustment of stator laminations. (c) Insert a .010 -inch speaker shim between the rotor and each of the fout stator field poles. Rotor should now be equidistant from each pole, and accurately centered. (il) Tighten screws and replace plastic cover. Stalling Going into Cycle: The mechanism s

31、hould be loaded with one record on the turntable. If stalling going into cycle takes place, it is probably due to insuffi- cient tension in the main lever spring or booster spring (43). An additional metal washer should he inserted between the spring and its guide. Stalling Coming Out of Cycle: If t

32、he mechanism stalls just as it is coming out of cycle, that is, when the pickup is at ite farthest distance laterally from the turntable, it is probable that there is too much tension in the booster spring. Any metal washers in this assembly .should be removed. CAUTION: The mechanism is designed to

33、handle a total of 8 -10 -inch records or 7 -12 - inch records. Intermittent Start, Slow Speed, or Stalling: These Conditions may be caused by binding of idler wheel on its mounting stud. Smooth and clean the idler wheel bearing so that it can rotate freely. QU7, QU-51, -52, -55, -56 Tone Arm Pressur

34、e Spring: When replacing the tone arm, or the mag- netic pickup head, check the needle pressure which should be approximately 31 ounces. Alter the counter -balance spring in arm to ob- tain the correct pressure, or install a new spring. Two springs (65 turns and 75 turns) are supplied under Stock No

35、. 38213. Use the spring that most nearly gives the correct pres- sure and then remove turns, or stretch the spring, as required, for final adjustment. RP -153 RECORD CHANGER Motor Data: Should it be necessary to rebuild or service any of these motors in the field by replacing end heads or using new

36、rotors and shafts, it must be noted that the rebuilt motors should be operated continuously for at least 48 hours before installation. The use of bronze bearings, diamond -bored for accuracy, together with the burnished steel shaft at the rotor provides a very close fit. As a result, the motor must

37、be run in approximately 48 hours, after which the oil has had a chance to fairly cover all contact surfaces of shaft and hearings, and a very smooth -operating long life bearing results. Mechanical Motor Noise: Mechanical motor noise due to armature end play sometimes develops with wear in the above

38、 instruments which use type RP -153 record changers. This can be eliminated by tightening the armature thrust bearings. Care should be taken to avoid making them too tight which will cause binding. Motor Hum: Excessive hum may be caused by incorrect assembly of the rubber grommets on the two bolts t

39、hat fasten the motor -mounting plate to the cabinet. The correct assembly is shown in the sketch. The rubber sleeve must be centered on the metal spacer so that the motor plate can not come in metallic contact with the spacer. RUBBER SLEEVE BE CENTERED ON SPACER CABINET BLOCK RUSHER ASNERS SPACER LO

40、CKWASNER MOUNTING - SCREW LOCKwASHER CCC / /WASHER I SPACER ND RUBBER SLEEVE WASHER RP.153 MOTOR MOut,TING ARRANGEMENT Excessive Motor Hum will Result in RP -153 if the Rubber Sleeves are not Centered on the Metal Spacers. V-170, V-200, V-201 Rumble: Rumble is related to motor vibration, com- bined

41、with high -gain amplifier, and prominent bass response. The vibration of the motor in these instru- ments is as low as it can he made: Do not replace it to correct rumble. Rather, reduce the low -frequency response by shunting a 50,000 - ohm i -watt resistor across the crystal pickup terminals. RUBB

42、ER BUMPER STUD Stock No. 38351: The stud for the rubber bumper (adjustment A) on RP -152, 153, 155, and similar auto- matic record changers, is available as Stock No. 38351. Idler Wheel Fiber Washers: I n nrrler to reduce idler wheel noise, the two meld washers have been replaced by two fiber ,vasli

43、ms in the Idler Wheel Assembly, Stock No. :1t,2 4, for the above record changers. The new fiber washers are Stock No. 39996. 收音机爱 好者资料库 RadioFans.CN PAGE 7Zg-C RP -152, RP -153, RP -155, RP -157 RP -152D, -153,W7 Automatic Switch Adjustment: In RP -152D and Re -153, an automatic motor switch is moun

44、ted under the motorboard, near the pickup atrc shaft. ECCENTRIC STUD CAM SPRING CAM PCSUP.LRM , RI+ _,.ER SWITCH DETAINING SHAFT A. ILEVER AND SPRING SWITCH _ PLW ap ere MO SLATTED MOUNTING HOLES RP -152D L 163 AUTOMATIC SWITCH (PICKUP ARM ON REST, AND INDEX LEVER AT W -OR 12) PICKUP RM SHAFT ECCENT

45、RIC STUD EAM SPRING F H KUHGER SMWOITCHTOR ter 2111 die net SWITCH V. PLUNGER MO SLOTTED UNTING HOLES SWITCH DETAINING LEVER SPRING SWITCH PLUG MOTOR SWITCH RP -152D 41SO AUTOMATIC SWITCH (PICKUP ARM IEPROM SPINDLE AND INDEX LEVER UT1AANUAC) When the index lever is set at its 10 -inch or 12 -inch po

46、sition, a detaining lever holds the switch plunger in and keeps the motor running. When the index lever is set at its manual position, the detaining lever moves aside and the switch plunger is then actuated by a cam on the pickup arm shaft. In manual position, when the pickup is on its rest, the swi

47、tch plunger is out and the motor circuit is open. When the pickup is moved from its rest to the edge of a 12 -inch record, the cam pushes the switch plunger in and the motor starts. When the pickup needle reaches a point IA inches from the centerline of the turntable spindle, the switch plunger is r

48、eleased by the sharp corner of the cam, thus shutting off the motor. When the pickup is lifted off the record and moved to its rest, the motor starts momentarily. ADJUSTMENTS: The slotted switch mounting holes permit positioning of the switch so that the plunger will be pushed in by the cam. The eccentric stud on the cam should be turned so that the switch plunger is released by the sharp corner of the cam when the pickup needle is 12 inches from the centerline of the turntable spindle. The original switch, Stock No. 36529, is superseded by an improved switch, Stock No. 38995. When inst