RCA-Victor-Co-Inc-RP-190 电路原理图.pdf

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1、MANUAL OF 1951 MOST-OFTEN-NEEDED RADIO DIAGRAMS MODEL IDENTIFICATION RP190-1 Uses pickup Slock No. 75476. RP190-2 Same as RPI90-1. except use pickup Stock No. 75575. RP 190-3 Same as RP 190-1, except use 85 volt motor Stock No. 75937. RP 190-4 Same as RP190-1, except ON-OFF switch; however, they are

2、 physically interchangeable LUBRICATION A light machine oii (SAE No. 10) should be used to oil the bearings of the drive motor. On all bearing surfaces, excepting the motor bearings. Hough ton STA-PUT No. 320. or equivalent, should be used. On all other sliding surfaces, STA-PUT No. 512f or equivale

3、nt, is recommended. (Do not oil or grease record separator shelves.) It is important that the drive motor spindle and the rubber tire on the idler wheel be kept clean and free from oil or grease, dirt, or any foreign material at all times. Carbon tetrachloride or naphtha is satisfactory for cleaning

4、 these parts. 82 CYCLING SLIDE ) rcaVictor R P-190 Series 45 R.P.M. Automatic Record Changer CAUTION Avoid handling Ihe pickup arm when the mechanism is in cycle. Do not use force to release a jam. Do not try to remove the records on the turntable if the turntable is stopped in cycle. If the separat

5、or knives protrude from the center post when the mechanism is out of cycle, push the start-reject knob to reject and the condition should be corrected automaticaliy. AUTOMATIC OPERATION Place a stack of records over the center post, with the de sired selections upward, the last record to be played o

6、n top. Push the start-reject knob to start (forward) and release. The mechanism will automatically play in sequence one side of each record stacked on ihe separator shelves. To reject a record being played, push the start-reject knob. At conclusion of playing and as the last record is being repeated

7、, lift the pickup arm and place on its rest. Turn off the power to the drive motor by pushing back on control knob. Remove the stack of records by lifting them straight up. /85 CYCLING CAM 70 PICKUP ARM RETURN LEVER % sL:*. 77 TRIP LEVER ASSEMBLY I A -53 RATCHET WHEEL 68 MUTING, SWITCH ICsA J -60 PO

8、WER SWITCH 82 A STOP DOG 111 收音机爱 好者资料库 RadioFans.CN MANUAL OF I9SI MOST-OFTEN-NEEDED RADIO DIAGRAMS RP-190 Series Function of Principal Parts Trip Lever (77) The trip lever is mounted on the bottom end of the pickup arm vertical pivot shaft. The function is to transfer the movement of the pickup ar

9、m to parts of the operating mechanism below the motor board. The end of the trip lever contacts stud on cycling cam thereby starts tripping action. Pickup Arm Return Lever (70) The function of the pickup arm return lever is to provide a force necessary to push the pickup into landing position. The e

10、nd of the pickup arm return lever is curved so as to provide a stop for trip lever. This stop determines landing position of the pickup. Reject Lever (22) The function of the reject lever is to trans fer the action of the control knob to the cycling cam thereby starting a change cycle. Muting Switch

11、 (68) The function of the muting switch is to short the pickup leads to prevent amplify ing of mechanical noise, of the merchanism during change cycle. Cycling Cam (85) The cycling cam is mounted on the cycling slide. The function of the cam is to trans fer the rotary motion of the turntable shaft i

12、nto sliding motion of the cycling slide. Stop Dog (82A) The stop dog is mounted on the end of cycling slide. The function of the stop dog is to engage the ratchet wheel on the sep arator shaft and prevent it from rotating, at the exact moment during change cycle. Ratchet Wheel (53) The function of t

13、he ratchet wheel located on the end of the separator shaft is to keep the separator shaft stationary at the proper time, so as to actuate the separator mech anism inside the centerpost. Cycling Slide (82) The cycling slide is the main connecting medium between the various moving parts. FUNCTION Plac

14、e a stack of records over cen terpost. Push control knob to reject. Cycling starts. Cycle of Operation EXPLANATION 1. Records rest on separator shelves protruding from either side of the centerpost. Fig, 3 The control first actuates the power switch applying power to the drive motor. This starts the

15、 turntable rotating. STUD Further movement of the control knob actuates the reject lever assembly (8) which contacts the stud mounted on the eccentric cycling cam and moves it slightly. CYCLING CAM 85 POWER SWITCH REJECT LEVER 8 -CONTROL KNOB 7 Fig. 4 1. The slight movement of the eccentric cycling

16、cam (85) is sufficient for engagement with the rotating knurled roller (62) mounted on, turntable shaft. MUTING SWITCH 68 CYCLING CAM 85 2. The eccentric cycling cam which is mounted on the cycling slide (82) pushes the slide in the direction of the pickup arm knurled pivot. In so doing tension is i

17、ncreased on the slide return R2ER spring (89). 3. The tab on the cycling slide moves back permitting muting switch to close. TENSION SPRING 收音机爱 好者资料库 RadioFans.CN MANUAL OF 19S1 MOST-OFTEN-NEEDED RADIO DIAGRAMS Cycle of OperationContinued RP-190 Series Pickup raises from the rest. 1. As the cycling

18、 slide continues to move in the direction of the pickup arm pivot the small incline pressed in the slide causes the elevating rod (74) to lift the pickup arm from the rest. 2. The raised pickup arm moves inward slightly from the in ward force of the pickup arm return lever (70), until the stud on th

19、e trip lever (77) assembly comes against edge of the cycling slide. 3. The cycling slide continues to move further, which pushes the trip lever back. The eccentric landing adjustment stud (79) contacts and pushes the pickup arm return lever (70) against the tension of the return spring (69). PICKUP

20、ARM RETURN; -LEVER (70) PUSHES / AGAINST STUD| / MOVING TRIP LEVER / IN UNTIL STUD-1 Mjmnr I COMES AGAINST | I SHOE-M PICKUP ARM RETURN LEVER TENSION , , SPRING 1 V ELEVATING ROD 74 ST, STUD COMES JV AGAINST SLIDE RATCHET WHEEL 53 Separator knives separate the lower record from the stack and the low

21、er record drops to the turntable. 1. As the cycling slide reaches the limit in its movement in the direction of the pickup arm pivot, the stop dog mounted on the slide engages the rotating ratchet wheel (53). 2. The ratchet wheel and separator shaft (6) then remains stationary and the turntable cont

22、inues to rotate. 3. The separator shelves and knives are coupled together in such a manner*that the flattened end of the separator shaft pushes the knives out, which in turn pulls the opposite shelves in. . 4. As the shelves recede, the separator knives mounted above the shelves move out and separat

23、e the lower record of the stack and support the remaining records while the lower record drops to the turntable. J FLATTENED END OF SEPARATOR. SHAFT KNIVES IN - SHELVES OUT KNIVES OUT-SHELVES IN Pickup moves in for landing. 1. The cycling slide moves away from the pickup arm pivot, due to the force

24、produced by the tension spring (89) keeping the eccentric cycling cam against the rotating knurled roller (62). The knurled roller at this time is returning io the smaller diameter of the cam. 2. The stud on trip lever assembly follows the slide due to the force produced by the action of the pickup

25、arm return lever. 3. After the slide has moved back a short distance the stud. on the trip lever assembly no longer follows the slide since the landing adjustment stud comes against the curved stop on the end of the pickup arm return lever. At this moment the pickup is directly above the point of la

26、nding. 4. As the cycling slide completes the return movement the elevating rod slides down the incline which lowers the stylus on the record. Jr T LANDING AD- f / JUSTMENT / STUD AGAINST / STOP ON RE - / TURN LEVER 70 STUD ON TRIP LEVER FOLLOWS SLIDE FOR A SHORT DISTANCE ONl_Yi THEN TENSION SPRING 6

27、9 收音机爱 好者资料库 RadioFans.CN MANUAL OF 19S1 MOST-OFTEN-NEEDED RADIO DIAGRAMS RP-190 Senes Cycle of OperationContinued 1. The tab on the cycling slide contacts and opens the muting switch. 2. The stud on the cycling slide pushes pickup arm return lever back to permit free motion of the pickup arm. 3. Th

28、e change cycle is completed as the cycling slide comes against the stop bracket, at which time the knurled roller rotates in the cut away section of the cam. 4. As the record plays and the pickup arm moves inward. 5. When the stylus reaches the end of the selection the end of the trip lever contacts

29、 the stud on the cycling cam, and pushes it slightly. 6. The slight movement of the cycling cam causes engage ment with the rotating knurled roller, thereby starting a change cycle. 7. The mechanism repeats the preceding sequence of opera tions until the last record of the stack has dropped and has

30、been played. This selection will be repeated until the pickup is lifted and placed on the rest. THtS STUD UNLATCHES PICKUP ARM RETURN /KNURLED ROLLER ROTATES IN CUT- i )A-WAY SECTION OF CYCLING CAM. TRIP LEVER PUSHING/ CYCLING CAM (85) / TO START CHANGE CYCLE SLIDE COMES AGAINST BRACKET AND STOPS Cy

31、cle completed and the record plays IF THERE IS A BIND IN THIS PIVOT, MECHANISM MAY NOT TRIP IF THIS BRACKET IS IMPROPERLY ADJUSTED, THE CYCLING SLIDE MAY BIND OR CONTINUOUS TRIPPING MAY RESULT IF THE SHELVES ARE GREASED, FOREIGN MATERIAL MAY COLLECT AND CAUSE BINDING. TENSION SPRINGS MAY NOT HAVE SU

32、FFICIENT FORCE TO PUSH THE SHELVES OUT. Fig. 16 DO YOU KNOW? Fig. 14 114 IF THIS KNURLED ROLLER IS LOOSE, MECHANISM MAY FAIL TO COMPLETE CYCLE IF THIS SPRING IS LOOSE OR MISSING, PICKUP WILL - LAND PROPERLY MANUAL OF 19S1 MOST-OFTEN-NEEDED RADIO DIAGRAMS SERVICE HINTS RP-190 Series RECORD STRIKES PI

33、CKUP ARM WHEN DROPPING PRELI MINARY LANDING ADJUST MENT MAY BE INCORRECTLY SET STOP DOG ADJUSTMENT STOP DOG MAY BE IMPROPERLY SET STOP DOG MAY BIND IN PIVOT TENSION OF SEP ARATOR SPRINGS MAY BE INSUF FICIENT CclD KNIFE AND SHELF ASSEMBLY MAY BIND FRICTION BETWEEN RATCHET WHEEL AND FRICTION COLLAR MA

34、Y NOT BE u- / SUFFICIENT FRICTION COLLAR MAY BE LOOSE PICKUP SKIPS GROOVES -DEFECTIVE STYLUS PREMATURE TRIPPING BRACKET IM- / PROPERLY SET. / CYCLING CAM TOO CLOSE TO KNURLED ROLLER -BIND IN PICKUP ARM PIVOTS STUD LOOSE, BENT, OR MISSING MANUAL OF 19S1 MOST-OFTEN-NEEDED RADIO DIAGRAMS RP-190 Series

35、PICKUP FAILS TO LAND PROPERLY WEAK SPRING ON PICKUP ARM RETURN LEVER PICKUP ARM RETURN, LEVER MAY BENT OR BIND IN PIVOT MECHANISM FAILS TO TRIP TAB MAY BE BENT CYCLING CAM MAY BE DE- FECTIVE SHAFT MAY BIND OR BE BENT LANDING ADJUSTMENT MAY BE IMPROPERLY SET * KNURLED ROLLER MAY BE LOOSE ON SHAFT SPR

36、ING MAY BE LOOSE OR MISSING MAY BE BIND ING IN PIVOT LANDING ADJUST MENT MAY BE IM PROPERLY SET TRIPPING STUD MAY BE IMPROPERLY ADJUSTED SPRING MAY BE LOOSE OR MISSING TRIP LEVER MAY BIND IN STUD Fig. 27 MECHANISM FAILS TO COMPLETE CYCLE SHAFT MAY BE BINDING KNURLED ROLLER MAY BE LOOSE CYCLING CAM M

37、AY BE DE FECTIVE SPRING TENSION MAY BE INSUFFICIENT ADJUSTMENTS MANUAL OF 19S1 MOST-OFTEN-NEEDED RADIO DIAGRAMS 1 - nor d - eOCD s*X JS) ) (6M)(6 45 . yf ft /|. RP-190 Series Original counterbalance and swivel assembly SWIVEL AND COUNTERBALANCE WEIGHT INCLUDED IN PICKUP ARM SHELL (STOCK N0.7609B) LESS COLLAR AND SCREW LISTED BELOW New counterbalance and swivel assembly part of pickup arm safety lever SAFETY SPRING (STOCK NO. 72362) SLIDE (STOCK NO. 7610t) New cycling slide SLIDE 82 (STOCK NO. 75763) 69 Original cycling slide