RCA-Victor-Co-Inc-9-55 电路原理图.pdf

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1、PAGEii2-A RADIOLA 28,vic-roR 9-2, 9-25, 9-401 9-55 tIV-4101 11.47, Cosa eereved Mr. Fiera VC77a 11: rwercs Wow. nom,37, - ii lip, I-1 F111 n ri (1 el 1 II r 1 ; I I lel I lei I Id, I:lei 1.1 rl LJLJ Li LJ S,1 LLJ U LJLJ 7 0 C0071.7. -J lilt 154,- and am. EMI .4 .747,77=aor NevaIshastrw Taw.17.1 to D

2、. 7.71,.rdreR. Fi.77 twos, Wiring Diagram-ELECTROLA 9-25 the stop to the right, and in other cases to the left. c. Check thesetting after succeseive trials until the proper posi- tionis obtained, and then re -tighten the clamping screw. 28 252721 24 23 2612 Fig. 1 Name of Part 1.Motor Plate 2.Lifter

3、 Ring Post Front 3.Lifter Ring Post Rear 4.Sound Box Lift Lever Stud 5.Slide Spring(Not Shown) 6.Main Slide 7.Intermediate Gear 8. Cam Gear 9.Index Lever 10.Index Shaft 11.Sound Box Control Lever 12.Clutch Release Lever 13.Sound Box Lifting Lever 13a Nut Screw 14.Collar 15.Shaft 16.Nut 17.Trip Lever

4、 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 22 17 13* 14 16 15 4 Taper Tube Return Lever Connecting Link Spring Spring Spring Motor -60 Cycle -25-30 Cycle -Universal Screw(3 Used) Thrust Washer(Not Shown, Pawl Carrier Clutch Wheel Spring Index Control Reject Lever Spring Tap

5、er Tube Assembly Screw(6 Used, Screw(2 Used) NOTE: -The operating unit of the Automatic Electrolas differs from the Automatic Victrolas in the taper tube return lever No. 18, Fig. 1. All 10-50 unite above serial No. 8950, all 10-51 above serial No. 800, and all 10-70 and 9-55 have a motor plate with

6、 provision for mounting the elec- tric pick-up shunt switch and the remote reject control. SERVICING 1. Should the sound box (or pick up) fail to awing into the record groove after the tone arm has descended to the playing position: Check to see that the machine is level. If the right side (facing t

7、he front of the machine) is lower than the left, the sound box will not swing over into the record groove. If the left side is low the sound box will skip the first few grooves of the record. This is because the tone arm is mounted at a slight angle to the horizontal, allowing the arm to swing into

8、the playing groove by force of gravity after lowering upon the smooth portion of the record. 47 45 AUTOMATIC RECORD CHANGER US ED WITH -Automatic Victrolas and Electrolas 10-50, 10-51, 10-70 and 9-55 2. If the record lift ring (No. 52, Fig. 2) fails to pick up record: a. The magazine spindleIs bent

9、either towards the front or back of the instrument. b. The magazine spindle (No. 36, Fig. 2) should either be lowered or raised slightly as the case may warrant, by adjusting screw (Part No. 19322). c. The record is warped. d. Lift ring shaft is bent. e. Operating unit and magazine stand are located

10、 either too far away or too close together, and will not permit the records to mount the buttons properly. Remove magazine stand and file bolt holes in board, if neces- sary, so that the stand may be placed in the correct position with reference to the operating unit. 3. If the record drops into the

11、 drawer after being lifted from the magazine spindle or fails to line up with the turntable spindle: a. The magazine spindle is bent either towards the front or the back of the instrument. b. A warped record has been used. c. Warped or bent lift ring. d. Lifter ring posts (2 and 3, Fig. 1) out of li

12、ne. 4. Should binding of the record lift pad (No. 50, Fig. 2) occur: a. Remove the shaft (No. 49, Fig. 2.)If bent, it should be replaced with a new shaft. b. Note if sides of record lift pad are binding against nut of latch and link of record lift ring.If necessary, file the sides so as to clear the

13、 ring. A bent shaft causes failure of the pad and lift ring to rise simultaneously. The record consequently is not raised from the turntable equally and is thus forced by the revolving turntable to strike the side of the record chute. This condition may cause breakage of records. ADJUING SCREW PART

14、19322 NUT PART 16251 35 36 37 38 525150 49 48 46 SPRINGPART 16998 Fig.2 Name of Part 35.Screw Nut (Not Shown) M. Magazine Spindle 37.Magazine Stand 38.Tilting Lever 39.Screw Nut(Not Shown) 40.Nut 41.Latch 42.Base 43.Screw 44.Screw 39 40 /1111-141:=Bo V:=9W, 43 44 45.Screw Nut (Not Shown) 46.Record G

15、uide 47.Latch 48.Link 49.Shaft 50.Record Lift Pad 51.Felt 52.Record Lift Ring 53.Felt 54.Screw 55.Switch 56.Roller 5. If the lift ring fails to discharge a record into the drawer after it has been played: The small spring (Part No. 16998) shown In Fig. 2 may be broken or disconnected. I1RCA VICTOR D

16、IVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U. S A. PAGE 240-A AUTOMATIC RECORD CHANGER Fig. 3 Name of Part 57.Nut 60.Felt 58.Screw 61.Screw 59.Trip Lever 62.Latch Trip 6. If the brake does not shut off at end of pro- gram: a. The small screw (No. 58, Fig. 3) on the automatic stop is not

17、properly adjusted. b. Set screw (No. 70, Fig. 4) located under brass plate on switch trip may be loose. c. One of the springs (No. 63 or No. 64. Fig. 4) on the brake may not be properly adjusted, or has become loosened. d. The electric switch contacts are sticking. On 10-50 below serial number 8951

18、and 10-51 below serial number 801 proceed as follows: Remove the bakelite cap of switch and spread con- tact points to permit easier operation. WHEN TAK- ING THE SWITCH APART BE CAREFUL TO OB- SERVE THE POSITION OF THE INSULATING WASH- ERS SO THAT THEY CAN BE PLACED IN PROPER POSITION WHEN REASSEMBL

19、ING. On all other automatic instruments the following procedure should be used: Remove bakelite top, loosen screws holding contact mechanism and with switch in closed position, move switch towards the shoulder of the latch, leaving enough clearance so that there is no pressure on movable contact arm

20、. This will allow the contacts to open to their maximum point and prevent arcing and sticking. File and clean contacts. e. Warped lift ring. 63. 64. 65. 66. 67. 68. 69. 70. 71. Name of Part Spring Spring Top Plate Switch Lever Nut Cord Plug Screw Bottom Plate and Switch Assembly 10-50 Below Serial N

21、o. 8951 10-51 Below Serial No. 801 All Other Automatics Bottom Plate Only 72.Spacer 73.Switch (Used with Bottom Plate 20305A) 7. Failure to reject a record when the reject button Is pushed may be caused by: a. Reject button having been forcibly pushed in, bend- ing connecting link to reject mechanis

22、m. ThN can be remedied by removing the front panel on which the index lever is mounted and bending the reject mechanism back to its original position. b. Defective reject magnet circuit. (Models 10-70 and 9-55). 1. Bad switch -dirty contacts. 2. Burnt out coil. 3. Broken wiring. Fig. 4 8. Continued

23、rejection when the button is not pushed may be caused by: a. The button being stuck, having been forcibly pushed in by the operator. b. Heavy grease or foreign matter in the cam notches of gear (No. 8, Fig. 1). c. Excessive pull in spring (No. 28. Fig. 1) or worn teeth on pawl. d. Worn trip lever e.

24、 Mechanism improperly timed. CAUTIONUse nothing but specified springs through- out. 9. If the point of the needle rides over several grooves in coming to rest on the record, or does not rise high enough to clear the record on its return, proceed as follows: a. Place Index lever in Victrola or Electr

25、ola posi- tion and permit mechanism to operate until the tone arm is in playing position and free. b. Note distance of point of needle below top of turn- table. This should be between h andof an inch. c.If the distance is not apptoximately the same as that given in (b), make the following adjustment

26、: Loosen screws holding crook stop to tone arm and alter the position of the crook stop until the correct distance of the point of the needle below the turntable Is obtained. d. Tighten screws. NOTE: -Carelessness in mounting the sound box or the pick-up on the tone arm, and failure to fit screw on

27、pick-up in hole provided for this purpose, will often result in a condition noted at the beginning of this section. 10. Should the mechanism trip when the index lever is in Victrola or Electrola position, and it has been definitely found that the cause does not lie in any of the points mentioned in

28、subject 8: a. Remove the back panel of instrument and loosen taper tube adjusting screw (Fig. I) one quarter (Yi) turn. b. Force the taper tube arm (the casting containing the adjusting screw) UP until the trip lever clears the ratchet by approximately : of an inch. and retighten adjusting screw. NO

29、TE: -The normal position of the collar should now be approximately it, of an inch below the base of the taper tube, PROVIDING ADJACENT PARTS HAVE NOT BEEN BENT OR TAMPERED WITH. 11. If the sound box or pick-up does not lower at the proper position onto a ten- or twelve -inch record:falls into the re

30、cord groove without first striking smooth outside margin: or does not reach the outside diameter of record before lowering: a. Place twelve -inch record on turntable with index lever in 12 -inch position, start the motor and note the distance at which the needle strikes to right or to left of correc

31、t adjustment. (Needle should strike record at approximately the middle of the outside margin.) b. Turn Index lever to Victrola or Electrola, allow- ing mechanism to complete cycle so that tone arm is free and in playing position. c.Stop motor. d. Move the tone arm towards the center of the record, p

32、ast the eccentric groove until it strikes the stop. e. Slightly etch the record label at this point with the needle. f. Remove the back panel of the instrument, allowing access to Taper Tube Adjusting Screw, as shown in Fig. 1. g.Loosen the screw one quarter (3d) turn so that the tone arm can be mov

33、ed the proper distance in the casting either to the right or left of the etched mark on the record until the proper adjustment has been obtained. The adjusting screw should again be tight- ened, BEING VERY CAREFUL THAT THE TAPER TUBE ARM CASTING HAS NEITHER RAISED NOR LOWERED WITH RESPECT TO THE TON

34、E ARM. is. Remove twelve -inch record and replace with ten -inch PAGE AUTOMATIC RECORD CHANGER i.Start the automatic mechanism again and allow it to run until the taper tube return lever starts to draw the taper tube towards the record.Shut off power and revolve turntable by hand(if induction disc m

35、otor is used) noting the manner in which the needle comes to rest on the record.(If it is noted that the horizontal travel of the needle changes to a slope just before reaching the record and continues so, until surface of the record is reached, It is evident that the mechanism is lowering the sound

36、 box or pick-up prior to the termination of the needles horizontal travel towards the record.) As a condition of this nature will sometimes cause the needle to drop outside of the record edge and damage the adjacent mechanisms, or, due to the greater velocity attained on the slope, break down the wa

37、lls of the first grooves, the following adjustments should be made: j.Slightly loosen lock nut (13A, Fig. 1) on cam button and with screw driver turn button about ten degrees in either a clockwise or counter -clockwise direction. k. Tighten nut and start the mechanism through Its cycle, again noting

38、 the manner in which the needle strikes the record. Observations should show a needle path practically horizontal until the needle Is almost directly over the margin of the record: then a gradual drop to the records surface.In the event that this adjustment has not yet been reached, turn the cam but

39、ton about ten degrees more in the same direction and repeat until the mechanism functions in the desired manner. In order that this gradual adjustment is not carried too far and to prevent the cam button from resting too much on the slope of the main slide, a check may he made from the following req

40、uirements: ith the index lever in Victrola or Electrola position, and the needle resting on the margin of a ten -inch record, the clearance between the bottom of the fulcrum pin on the taper tube assembly and the fish tail on No. 13, Fig.1. should he about h of an inch, providing the fish tail has n

41、ot been bent. From the above description it should now be evident that the main function of the cam button is to deter- mine the time or position with respect to the hori- zontal travel of the sound box or pick-up, in which the needle is lowered onto the record, and its adjust- ment should not there

42、fore be altered for other fail- ures. 12. Should the pick-up shunt switch (shown dotted in Fig. 9) fail to close or should it momen- tarily open after the reject button has been operated, or fail to open when the first music grooves are reached: With roller G engaged in pawl carrier at point II, Fig

43、. 9, loosen screws holding pick-up shunt switch to the operating unit base, and adjust its position so that the contacts have a clearance of aboutof an inch. If the condition cannot be corrected by the above adjustment, loosen the nut shown at 13A, Fig. 1, and turn the screw slightly as may be requi

44、red. 13. Should the mechanism fail to trip in ten- or twelve -inch position: a. Loosen set screw under crook joint collar of tone arm and tighten collar untilallside play is removed, being careful, however, that the up and down move- ment of the crook is not impeded. b. Remove any possible bind from

45、 trip pawl on fulcrum pin mentioned in (k), No. 11, above. 14. If the index lever does not point to the proper position on indicator plate, adjustment can be made in the following manner: a. Remove hack of cabinet to give access to gears con- trolling Index lever.The shaft and pinion are on a block

46、which is attached to the top plate with two screws. b With a short screw driver loosen these screws until gears are clear. c. Set Index lever so that It points to proper position on indicator plate. d. Re -tighten the screws and then replace the back of the cabinet. Figures 5, 6 and 7 explain detail

47、s of oiling and cleaning the entire mechanism. DO NOT USE HEAVY GREASE. Heavy grease or foreign matter lodging in the cam notches or gears may cause failure of operation. r USE VICTOR MOTOR OIL VICTOR MOTORR EASE LUBRICATE SPIRALOF SHAFT ANDTEETUOF GEAR WITH VICTOR MOTOR GREASE OILUPPE9AND LOWER TUR

48、NTABLE SPINDLE BEARINGS ATTACHING PLUG BODY ATTACHING PLUG CAP MOT OR CARD MOTOR TO CABINET CORD uSE ANDVICTO vICIOR R-MOELECTRICTOO-OiL MOTOR GREASE BRUSH HOLDERS iUSE VICTOR ELECTRIC MOTOR GREASE IN GREASE CUPS ATTACHINGOIL PLUG CAP BEARINGS A ACHING PLUG BODY THIS lASTRUMENTLS LISTED UNDER THE RE

49、EXAMINATIONSERVICEOF THE UNDERWRITERS LABORATORIES OIL FRICTION LEATHER OIL BEARS. AND ,.IT, EYE Fig. 5 OIL FRICTION LEATHERS AL_ OILBEARINCS1 ANDGCVERILDR FRICTION SLEEVE LUBRICATE SPIRAL SHAFT AND TEETH OF GEAR WITH GREASE Fig. 6 OIL LOWER GEAR STUD OIL GEAR STUD cs LUBRICATE TEETH OFGEARS 0 WITH VICTOR MOTOR GREASE OIL CRANK PIN OIL EDGE OF SUDER USE VICTOR MOTOR OIL AND VICTOR MOTORGREASE OILING DIAGRAM Fig. 7 PAGE 242-A AUTOMAT IC RECORD CHANGER Precautions necessary in reassembling: a. Replace thrust washer (No. 25, Fig. 1). b. Remount motor on bed plate. c. Retime mechanism