RCA-Victor-Co-Inc-RP-197-1 电路原理图.pdf

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1、PIVOT- LANDING ADJUSTMENT SCREW CONTROL MANUAL OF 19S4 MOST-OFTEN-NEEDED RADIO DIAGRAMS rcaVictor RP-197-1 LANDING ADJUSTMENT Only one landing adjustment is necessary. Tho landing position of the stylus is adjusted by means of the round head screw at the side of the pickup arm support bracket. When

2、adjusted for correct landing on one size of record, the landing position for other sizes of records is automatically correctod. PICKUP ARM HEIGHT ADJUSTMENT The pickup arm height during cycle is adjusted by means of the hex head screw, located in the pickup arm. Turn control knob to REJ” and rotate

3、turntable by hand until arm has nsen to its maximum height. Adjust screw so that stylus is 1% above turntable RECORD DROPPING ADJUSTMENT The eccentric stud (111 No. 101) on the end of the cycling slide controls the time during cycl at which the record drops to the turntable. Adjust the position of t

4、he stud so that the record drops to the turntable when the pickup arm has moved to its maxi mum outward travel. If the record drops too soon it will strike the pickup arm. If timed too late the record may not drp- PICKUP ARM KUP ARM CIGHT ADJUSTMENT PICKUP ARM CLAMP SCREW Figure 1Controls 3Pickup Ar

5、m Height and Landing Adjustments PIVOT LEVER (58) (49) RECORD SEPARATOR MOTOR Grf) SPRING T TENSION PLATE J(55)LAST RECORD SHUT-OFF LEVER |i p4|I S y H h I s I i”-i s s S a 8 | 0Rf a S a i V1 - 2 y B liaEJtPg WiliP I is-S I-Is * a : 6) - I * S H a R*! tn “ ” S . I gipU=H:S . 3 m B V o-ttgRt r* CO 0)

6、 aj M 1 t | fi 4a J i SmmlT .17715 S S ft o %S S. d q,(/2 I III. Cn -q O O (ft 04 Cn (O rn Cn Cn CO Cn OO CO qq 00 CO 00 CO Cn Cn Cn Cn Cn CO -bC O O 04 O (ft (ft 04 CO nJ Cp CT (O Cn CO 04 (5 O CO CO CO CD CO Cn cn. Cn Cn Cn Cn 04 CO 9* (ft CO Cn CO O) 04 04 04 04 04 04 04 04 04 04 04 04 SPINDLE 10

7、“ INDEXING BUTTON 0 INDEXING LEVER SPRING SPRING 3 Y% MOTOR A S5EMBI SPRING i SWITCH ACTUATING LEVER BRACKET WASHERS (90X9 1 MUTING SWITCH 70 SPRING SPRING MANUAL OF 19S4 MOST-OFTEN-NEEDED RADIO DIAGRAMS RCA Victor Record Changer RP-197-1 (Continued) 12 INDEXING LEVER STABILIZER ARM PICKUP ARM ASSEM

8、BLY STYLUS SELECTOR KNOB SPEED - SELECTOR KNOB ON-OFF-REJECT CONTROL LEVER WELL FOR CENTER POST Figure 5Top View with Turntable Removed TRIP SLIDE 99 ,A.lllr,r LANDING AUTOMATIC SHUT-OFF 10 INDEXING SELECTOR SHUT-OFF LEVER LEVER LEVER PIVOT 63 (?*) 74b) n) 12- INDEXING LEVER BRACKET SPRING AlSfiFUFD

9、 SPRING LOCK-OUT ARM LEVER HOLD LEVER Figure 6Partial Bottom View with Cycling Slide Removed SHUT-OFF LEVER LINK PICK-UP ARM RETURN LEVER RETURN LEVER LOCK LOCK-OUT LEVER MANUAL OF 1954 MOST-OFTEN-NEEDED RADIO DIAGRAMS RCA Victor Record Changer REPLACEMENT PARTS ILL. NO. STOCK NO. DESCBXPTION 79096

10、45 R.P.M. CENTERPOST Centerpost45 r.p.m. centerpost com plete CapNose cap i 79201 2 79203 KnifeRecord separator knife (1 set) 3 79202 SpringRecord separator knife spring 4 79204 LeverActuator lever assembly 5 79205 ShelfRecord support shelf 6 79206 SpringRecord support shelf spring (16 turns) BodyCe

11、nterpost body assembly 7 8 79207 Screw#4-40 screw for nose cap 9 79208 WasherFibre washer 10 RotorDie cast rotor 11 76954 SpringRotor lift spring (coi 1) (1.138 O.D. x 14-5 turns) LiftRotor lift 12 79209 13 79210 RetainerRotor lift retainer (8 tooth) RP-197-1 (Continued) OPERATION OF 45 RJJML CENTER

12、POST In the out of cycle position (playing), the 45 r.p.m. records (with l/i centerhole) rest upon the protruding shelves of the centerpost (knives are retracted). When the mechanism goes through cycle, the record push- off finger of the % center spindle pushes against the actuator lever. This lever

13、 is pivoted and pushes outward on both sep arator knives. The knives will then support all records except the bottom record. Projecting tabs on each knife engage the OPPOSITE shelf and thus retract the shelves and allow the bottom record to fall to the turntable. As the push-off finger moves back to

14、 the normal position, one pair of springs pull the knives inward and another pair of knives push outward on the shelves. The stack of records then drop slightly and rest upon the shelves. Careless placement or removal of the 45 r.p.m. centerpost on the center spindle may result in bending of the cen

15、ter spindle. The 45 r.p.m. centerpost should be placed on or re moved from the center spindle with a STRAIGHT VERTICAL MOTION. LUBRICATION The mechanism is properly lubricated when it leaves the factory, additional lubrication should not be necessary for a long period of time. Oil bearings of motor

16、and rotating levers sparingly with high quality light machine oil. Apply a medium weight clinging type of grease to points of sliding contact including tabs of cycling gear. It is important that the drive motor spindle, all rubber tires and the inside rim of the turntable be kept clean and free of o

17、il and grease. Carbon tetrachloride or naphtha is recommended for clean- I these parts. Figure 845 r.p.m. Centerpost n5i n5i MANUAL OF I9S4 MOST-OFTEN-NEEDED RADIO DIAGRAMS RCA Victor Record Changer RP-197-1 (Continued) REPLACEMENT PARTS ILL. NO. STOCK NO. DESCRIPTION i 79243 PICKUP & ARM ASSEMBLY A

18、rmPickup arm shell only 2 78731 BracketPickup mounting bracket 3 79244 SpringPickup mounting bracket spring 4 WasherFlat metal washer 5 78730 KnobStylus selector knobless screw SA 79359 Screw#1-72 x % round head for 6 77779 stylus selector knob PickupCrystal pickup complete with 7 74410 two styli Sc

19、rewPickup mounting screwfillister 8 78733 head #4-40 x CablePickup cable assembly (3 wire) 9 complete with terminals BracketBracket for pickup cable 10 71095 NutSpeed nut to hold cable ILL. NO. STOCK NO. DESCRIPTION n 78741 PivotBrass bearing for pickup arm pivot 12 78742 ShaftPivot shaft 13 78738 S

20、pringSpring for height adjustment screw 14 78740 ScrewHex head #6-32 height adjust ment screw 15 M/k.UMM SpringCounterbalance spring 16 nm BracketMounting bracket for pickup arm 17 78739 SpringLanding adjustment screw spring 18 78732 CollarPickup arm mounting collar less screw 18A 79245 ScrewSet scr

21、ew for pickup arm collar 19 78728 ScrewLanding adjustment screwR.H. #6-32 x The styli are held in position by small hex nuts (one for each stylus). Remove the nut and push threaded end of stylus through the cartridge. Although the 78 and the 45-33% styli are mechanically interchangeable, they should

22、 be replaced in such manner that the stylus which is coded red will contact the record when 102 33-45 on the stylus selector knob is visible from the top. CAUTION: The internal element of the pickups can be fractured by use of excessive force. It is advisable to grip stylus with pliers instead of holding pickup case while removing nuts.