RCA-Victor-Co-Inc-R-566-P 电路原理图.pdf

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1、MANUAL OF 1942 MOST POPULAR SERVICE DIAGRAMS PICKUP TURNTABLE RECORD SUPPORTS MOTOR BOARD TURNTABLE SPINDLE Vii Tri.-rL MOTORS FOUR CHASSIS BOARD SCREWS FlELO Cathode-Ray Alignment is the preferable method. Connections for the oscillograph are shown in the schematic diagram. Output Meter Alignment.I

2、f this method is used, connect the meter across the voice coil, and ttfrp the receiver volume control to maximum. * Test-Oscillator.For all * alignment operations, connect the low side of the test-oscillator td the common negative, and keep the output as low as possible to avoid a-v-c action. Connec

3、t the high side of test- oscillator to Tune Turn test-osc. radio dial Adjust the follow ing for max. peak output I-P grid, in aeries with .01 mfd. 466 kc Quiet point 1 600 kc L8 and L9 2nd I-F transformer 1st Det. grid In series with .01 mfd. end of dial L6 and L7 1st I-F transformer Ant. terminal i

4、n series with 200 mmfd. 1,600 kc Gang at C5 (oac.) C6 (oac.) Radiated signal 1,300 kc Signal Frequency CS (ant.) Repeat steps 3 and 4. Simplified schematic voltagb doubler circuit - 12V. (ISOOKC) av. (550 KC) voltages should HOLO WITHIN 20% WITH IITV. AC. SUPPLY. * MEASURED WIT* CHANALYST OR VOLTOHM

5、VST. VOL.CONTf?. 500 M SOVG:. =- ,- n Turntable does not turn freely. (Turntable Bottoni Bearing Position) Loosen the bottom bearing screws B and position the bottom bearing plate until the turntable revolves freely: Tighten the screws and check by applying a.c. to the turn- table motor then shuttin

6、g it off and noting that the turntable continues to make at least twelve revolutions. Bin iiCii POSITION / /ADJUSTMENT OF 10, RECORD AT 1a _ i 2 Records strike sea -22 rotor post or fail to stay on record shelf. (Spacing Between Record Posts) isci Turn the record support post to the ten -inch positi

7、on. Loosen set screws C, hold the separator post against the end of its slot in the motorbtiard and turn the belt drum to take up any slack it the belt. Tighten the zinc -plated, blunt- nosed screw and check to see that a ten -inch record fits the posts as shown. Then tighten the copper -plated, con

8、e -pointed screw. The twelve -inch position is adjusted after that of the ten inch, by changing the support post to take the twelve -inch record, and turning the eccentric stop until the edge of the record is halfway up on the record support bevel while the other edge is against the record separator

9、 post. - 7,-is B BOTTOM T RECORDKZPTAK D. iiDIs e RECORD SEPARATOR KNIFE e DJuSTAAENT 12 SHELF Records do not dropthe at proper time. (Record Shelf Tim- ing) SIDS Place a ten -inch record on the posts. Loosen the set screws D and turn the record separator shaft until the edge of record -separating k

10、nife is one -sixteenth inch away from the edge of the record. The teeth on the inner circumference of the knife should be resting in the bottom of their slots at the time the adjustment is made. Tighten the zinc -plated screw first, run through cycle several times as a check, then the copper -plated

11、 screw. Do not tighten set screws D enough to distort the housing of the separator shaft spring. RECORD SEPARATOR di9-= AND SWIVEL I , rf F=t 7 ; ; ;i W SEGMENT 1 ;e,= E +i INDE% FINGER ON TONE ARM RETURN LEVER ie .rr ie v Tone.arm continues to repeat playing of top record or jams when part way in o

12、n record. (Segment height or radial position) / E Take all records off the posts. Loosen the set screw E. Set the record separator segment so that the index finger of the pickup arm return lever rides on the middle of the segment, as shown. Rotate the cam until it is in such a position that the inde

13、x finger will never ride off either end. Check to see that the index finger rides in over top of the cam when the record shelf is depressed by the weight of one record. Tighten the set screw. INDEX FINGER SEGMENT E 24 TONE ARM RETURN 0411 Q FEED -IN osm.G LEVER Sapphire does not land at correct poin

14、t on 10- inch record. ;F (Tone Arm Position With Respect To Trip Lever) C o r r e c t dimension from outside edge of s i n d l e to sapphire 416 inches. Place a ten -inch record on the turntable and rotate the changer through cycle until the sapphire is just ready to land. Make sure that the index f

15、inger of the pickup arm return lever is against the record separator shaft and that the tone arm trip lever stud is held firmly against the return lever. Loosen the set screws F and move the pickup arm to the correct landing position. See that there is a 1/32 inch clear- ance between the pickup arm

16、bearing and the set screw collar. Tighten the zinc -plated screw, run the changer through cycle several times as a check, then tighten the copper -plated screw. The twelve -inch landing position is automatically main- tanned. rv,0 RATCHET LEVER 23 STUD (. LTRIP EVER TRIP F G. i t PSU; O ;M, BRACKET

17、I 1 T niiiii y 1 Top of pickup arm strikes stack of rec- ords or sapphire fails to clear the records on the turntable. iv. (Pickup Arm Height WhileIn Cycle) Rotate the changer through cycle until the pickup arm has risen to its maximum height above the turntable but has not begun to move out. At thi

18、s point adjust the screw G until the distance between the turntable and the sapphire is one and three -sixteenths inch. Tighten the locknut. PAWL STUD ,/TRIP MAINTAIN Y32 LEVER CLEARANCE i,=. -_ IN 23 ,(TONE MANON DAM ARM GEAR LIFT ROD Ytlit -/i ARM LIFT LEVER BOTTOM BRACKET PAGE 741-C RP-I58, RP-I6

19、0, RP-I61, RP-I62 Mechanism fails to start, or automatic stop switch is inopera- tive in automatic po- sition. H (Control Cam Position) RP -180 Set the control lever to automatic. Loosen set screw H and move the control cam until the stud on stop switch is centrally located as shown. Tighten set scr

20、ew H. CONTROL CAM STOP SWITCH No output, or noise during cycle. J (Position of Pickup Shorting Switch) RP -180 Loosen screws J. Position the switch to obtain Y32 -inch clearance between the switch blades when the tone arm is in playing position. Tighten screws J. Make certain that the pawl is on the

21、 correct side of the long leaf spring in the shorting switch. Fails to Trip: First check adjustment F. Do not tighten screws F too tightly or the hollow pivot shaft will be distorted. ARM TWISTED-, EXCESSIVE PLAY IN BEARING Ccl TOO STRONG USE VASELINE TRIP LEVER IP wiejA O G TOO , TRIP BLUNT PAWL TR

22、I P LEVER LOOSE OR MISSING_ TIMING NOTCH LOOSE OR MISSING BINDS MAINTAIN CLEARANCE CREWS LOOSE RATCHET LEVER TOO STRONG ROUGH OR BURRED DRII,E CAM P/WL BINDS ON DRIVE CAM BURRS LATCHET LEVER BINDS TONE ARM LEVER SMORTI NO PAWLH Lands Incorrectly. Fi=st check adjustments F, C, M, E. TONE ARM RETURN L

23、EVER TRIP LEVER STUD USE VASELINE STUD /l BENT BINDS PICKUP SNORTING SWITCH LOOSE OR MISSING FEED IN SPRING BENT OUT TOO FAR BURRS OR BINDS BETWEEN LEVER ADJUSTMENT FEED - IN I_E VF R O iflMllllMlllllr0 O FEED- IN SPRING TONE ARM RE-ruRet LEVER Stock No. 39751 tone arm return lever has a cam to adju

24、st 12 -inch landing position, and a positive acting feed -in mecha- nism. The feed -in tension can be adjusted by hooking the spring in a different hole on the bracket, and by bending the bracket. Bakelite Alternate Replacement Parts: file following shows a comparison of replace- ment part stock num

25、bers for the above record changers when Bakelite parts are used as alter- nates for regular die -castings: Stock No. Stock No. Description Die -Cast Bakelite Record Separator Assembly: Separator cap 384711 3847(1 Separator knife :18467 39768 Separator spring (upper) :184118 :19769 Separator spring (

26、bot- tom) (RP -158, -160, -161) 38621 39968 Separator shelf and shaft (RP -158, -160, -161) 38652 39767 Separator shelf and shaft (RP -162) 39035 39770 Main Cant 38641 :39760 Record Support and Shaft (Left hand front post): (RP -158, -160, -161) 38645 39762 Record Support Cam: . (RP -158, -160, -161

27、) 38646* 39763t Tone Ann Segment Cam: - (RP -158, -160, -161) 38619* 39764f *The die-cast cams 38646 and 38619 require a 10-32 set screw, stock number 32869, to fasten cam to shaft. The hakelite cams 39763 and :19764 require a drive pin, stock number 39765, to fasten cam to shaft. (A drive pin is in

28、cluded with 39763 and 39764). RP -158, RP -160 Eccentric. Stop, No. 39569: In Replacement Parts, add Stock No. 39569 eccentric stop for record separator support. Slow Speed: In cases of slow speed, adjust the bottom bearing of turntable spindle to remove binding and to obtain free rotation. Refer to

29、 adjustment B in Service Data. Check by applying power to the turntable motor, allowing turntable to reach full speed, then pull motor away from turntable drive disc. The turntable should coast for at least twelve revolutions. (In RP -162, dis- engage motor from turntable by pulling idler away from

30、turntable to observe coast.) RP -160 Spring For use with Zinc Crystal: On RP -160 with aluminum pickup arm, and aluminum -cased crystal, the spring that governs pickup pressure is No. 30585: with zinc pickup arm and aluminum -cased crystal, the spring is No. 39673. When installing a zinc -cased cry-

31、 stal in a zinc arm, cut 11 turns off the spring, or install a No. 39754 spring. RP -160 Sapphire Pressure: The correct sapphire pressure in RP -160 is approximately 1 ounces. The pressure is governed by a spring inside the end of the pickup arm. Owing to the fact that both aluminum and zinc casting

32、s (with difference in weight) have been used for the arm and the crystal, and also that only the zinc crystal (Stock No. 39550) is supplied for replacement, In order to reduce idler wheel noise, the two metal washers have been replaced by two fiber washers in the Idler Wheel Assembly, Stock No. :362

33、74, for the above record changers. The new fiber washers are Stock No. 39996, Tone Arm Stop Bracket: On 2nd production RP -158 and RP -160, a stop bracket has been added to the top of the motorboard to restrain the ton arm. It is mounted by means of the same screw, lock - washer, and nut used to mou

34、nt the pickup shorting switch. Where difficulty is experi- enced with excessive movement of the tone arm on 1st production mechanisms, this bracket may be added as shown. The bracket is Stock No. 39832. SHORTING SW MOUNTING SCREWS BRACKET AUTOMATIC STOP Sw. no MANUAL OFF Tone -arm stop bracket (No.

35、39832) position on RP -158, -160. Change in Reject Lever and Button: 2nd production of RP -158 and RP -162 auto- matic record changers have a reject lever ar- rangement as shown in accompanying sketch. Stock No. Description 39755 39758 39757 Button-Reject button Lever-Reject lever and stud Lever-Rej

36、ect button right angle lever REJECT BUTTON STK NO. 39755 MOTOR BOARD STK NO. 39757 STK NO. 99756 REJ EC T LEVER Revised reject button and lever in RP -158, -162. it is necessary to check the sapphire pressure whenever either the crystal or the arm is re- placed. The zinc arm is identified by the let

37、ters ZN after the drawing number inside the arm. The zinc crystal is identified by the letters ZN moulded at the rear end of the cartridge. The various combinations are tabulated be- low, along with the Stock Numbers of pivot anus and springs involved. ARM AND CRYSTAL COMBINATIONS CORRECT ARM AND SP

38、RING Aluminum arm Stock 38650 Aluminum crystal Stock 38453 Pivot arm Stock 38603 Pivot arm spring Stock 30585 Aluminum arm Stock 38650 Zinc crystal Stock 39550 + lt Pivot arm Stock 38603 Pivot arm spring Stock 30585 Zinc arm Stock 39671 Zinc crystal Stock 39550 Pivot arm Stock 39672 Rivet for arm an

39、d spring Stock Pivot arm spring Stock 39754 39674 Zinc arm Stock 39671 Aluminum crystal Stock 38453 Pivot arm Stock 39672 Rivet for arm and spring Stock Pivot arm spring Stock 39673 39674 REVISED RATCHET LEVER PAGE 745-C RP -I58, RP -160, RP -161, RP -162 In RP -158, -160, and -162, continuous trip-

40、 ping can be caused by failure of the ratchet lever to block the drive cam pawl at comple- tion of a change cycle. This has been corrected by doubling the thickness of the end of the ratchet lever so that it presents a broader face to the edge of the drive cam pawl. The lever with double thick- ness

41、 is carried under the same Stock Number (38656) as the original lever, which it super- sedes. ORIGINAL RATCHET LEVER DRIVE CAM PAWL REVISED RATCHET LEVER DRIVE CAM PAW L Continuous tripping in RP -158, -160, and -162 can be caused by failure of the racket lever to block the drive cam pawl. The repla

42、cement lever has double thickness at end to pre- sent a broader face to the drive cam pawl. DINE /ELI Trip Lever and Trip Pawl Spring: The original bronze trip -pawl spring, Stock No. 38562, is no longer available. When this spring requires replacement, due to loss or irreparable damage, it is neces

43、sary to install either a new steel spring, Stock No. 39961, in accordance with instructions given below, or else install a complete new trip lever assembly which employs the steel spring. In RP -151, the new trip lever, trip pawl, and steel spring assembly is Stock No. 38561. In RP -158, -160, and -

44、162, the new trip lever, trip pawl, and steel spring assembly is Stock No. 38632. The new lever and spring assemblies will be supplied on orders for the original assemblies. Installing Steel Spring No. 39961 on Trip Lever: 1. Drill a 3/32 -inch hole in lever as shown. 2. Cut off the tab that was use

45、d to anchor the original bronze spring. 3. Install steel spring as shown. Recorder Mechanism Data CUTTER READ TENSION PULLET DRIVE BELT DOE TENYDwYRi4 CARE SPOOL_ CARLE WEIGHT CUTTER READ NEIORT ADJ. A.5 .CR IVE BELT PULLET AND GEAR NTERNTDiAT GE R D I l1DRrvc ALAR ND ,STYLUSI . SHHOLE GLOCN GDNIROL

46、 RNOS NLL DELI L A Cutler :fro: Drive: The cutter head is belt driven from the turntable spindle through the train of gears at the spindle end of the cutter arm. Tension on the drive belt is maintained by a tension pulley at the pivot rend of the cutter arm. Two fixed pulleys and one tension pulley

47、guide the cutter head on the recorder arm track. The cutter arm pivot shaft bearing should be so positioned BELT DRIVE LOCKING CUTTER TENSION CONTROL GUIDE PULLEY CAM - _ 1= CUTTER BELT TUD CONTROL KNOB RECORDER i ARM TRACK I GUIDE 11 PULLEYS . m 11WU1PVIWa1 j.,. ,.111111111 WWII _ IlallllllllNl;g11

48、1I :Il i_CUTTER CRYSTAL PIVOT ADJ. SCREW IIINIIIIIIII GUIDE PULLEY TENSION IN SPRING , PRESSURE /1 111111 WO RANGE A DJ STYLUS SCREW STYLUS ( / e CAM FLAT SPRING STYLUS ADJ. CONTROL KNOB CUTTER PIVOT STYLUS PRESSURE RECORDER HEAD ADJ. SPRING CAM SPRING Cutter Head VHS-tla Lubrication: Lubriplate No. 110 should be used on all gear and pulley studs, pivots, sliding and bearing surfaces of the recorder arm and cutter head. However, do not lubrica