Admiral-21B1-C1-D1-H1-J1-Rider-TV6电路原理图.pdf

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1、ALIGNMENT INSTRUCTIONS INSTALLATION DATA. PARTS LIST PRODUCTION CHANGES 4 INDEX PAGE PAGE 6-7 SCHEMATIC 3 1 TOP VIEW TUBE LAYOUT. . . 2 4-5 TRIMMER LOCATIONS 6 VOLTAGE MEASUREMENTS . . . 2,3 BUILT-IN ROTO-SCOPE ANTENNA The built-in Roto-Scope antenna is operated by the antenna control lever which ex

2、tends from the back of the cabinet (near the top). Set the antenna control lever in that one of its three positions (left, center, or right) which gives the clearest picture. When an external indoor or an outdoor antenna is required, be sure to disconnect the built-in Roto-Scope antenna leads from t

3、he antenna terminal board. When disconnected, tape the Roto-Scope antenna lead lugs and place them away from the chassis. INPUT IMPEDANCE and TRANSMISSION LINES The input impedance to the receiver is 300 ohm balanced (between antenna terminals). When using a 300 ohm transmission line connect it acro

4、ss the antenna terminals. Input impedance between one antenna terminal and chassis is approximately 75 ohms. When using 75 ohm coaxial transmission line, connect the outer conductor to the chassis and the inner conductor to either antenna terminal; use the terminal which gives the most satis- factor

5、y picture on the weakest station. FUSE LOCATION The horizontal output circuit is fused with a % amp, 250 volt fuse, part ifr84A4-2. The fuse is located in the back end of the high voltage compartment. CHASSIS NOTES Chassis used in the straight TV and combination models differ in that the combination

6、 models have con- nectors for supplying power to the radio and the cabinet pilot light. To service the television chassis in combination models with the radio disconnected, it will be necessary to com- plete the heater circuit by connecting a wire jumper from pin L to pin K. See plug and socket draw

7、ing on schematic. Since the radio receives its power from the television chassis, it cannot be operated without the television chassis. Important: If both the radio and television are turned on at the same time, neither unit will operate. PICTURE TUBE HANDLING PRECAUTION Due to the high vacuum and l

8、arge surface area of picture tubes, great care must be exercised when han- dling these tubes. Shatterproof goggles and heavy gloves should be worn while handling or installing a picture tube. The picture tube must not be scratched or sub- jected to excessive pressure as fracture of the glass will re

9、sult in an explosion of considerable violence which may cause personal injury or property damage. HIGH VOLTAGE WARNING High voltages are present throughout this receiver. Operation with cabinet removed involves shock hazard. Exercise normal high voltage precautions while working with this set. After

10、 the antenna is set properly, make all checks or adjustments given here to insure best performance and ease in tuning, /f is especially important that the Channel Slugs and Ion Trap be adjusted upon installation or servicing of every set. For best results, all checks or adjustments should be made us

11、ing a transmitted television test pattern. A mirror placed in front of the picture tube screen will be of help in observ- ing the picture while adjusting rear panel controls. NOTE: If both radio and television are turned on in combination models, neither unit will operate. Be sure set owner has been

12、 properly instructed on the operation. John F. Rider RadioFans.CN PcArKCTUREi Tune in a picture as instructed in the customer in- struction leaflet; note illustrations on interference effects. ABJUST CttANMIU SLUGS Individual channel oscillator adjustment of every receiver should be checked upon ins

13、talla- tion or servicing. If this adjustment is properly made, it is possible to tune from one station to another by merely turning the CHANNEL con- trol and if necessary, slightly readjusting the TUNING control. With correct oscillator channel ad- justment, best picture and satisfactory sound will

14、be located at the approximate center (half rotation) of the range of the Tuning control. This adjustment can be made without removing the chassis from the cabinet. Adjust as follows: a. Turn the set on and allow 15 minutes to warm up. b. Set the CHANNEL knob for a station; set other con- trols for n

15、ormal picture and sound. c. Set TUNING control at center of its range by rotating it approximately half-way. d. Remove the CHANNEL and TUNING knobs. e. Insert a % blade, NON-METALLIC screwdriver in the 14 hole (to the right of the channel tuning shaft). For each channel in operation, carefully ad- j

16、ust the oscillator slug for clearest picture detail. Then check sound, and if necessary readjust for mini- mum buzz. Only slight rotation of the slug will be required; turning the slug in too far will cause the slug to fall into the coil. (If an oscillator slug should fall into the channel coil, rem

17、ove the coil, move the slug retaining spring aside, lightly tap the open end of the coil against a solid object until the slug slips out. Replace slug and set the slug retaining spring into its cut-out slot.) These sets use a 16TP4 or 16RP4 picture tube. If the set has the 16TP4 tube, locate the ion

18、 trap on the neck of the tube with the blue sleeve on top and the magnet to the left (facing rear of chassis). With the 16RP4 tube, locate the blue sleeve to the left and the magnet at the bottom. Starting from a point close to the tube base, very carefully move the ion trap forward or backward, and

19、 at the same time rotate it slightly in either direction; adjust for the brightest picture possible with the BRIGHTNESS control set for average brightness. Note that there may be two locations where the bright- est picture can be produced. The second ion trap location, which is further forward on th

20、e tube neck, should not be used. Important: Should the corners of the picture be- come rounded off or shaded after adjusting the ion trap, correct this by moving the deflection yoke coil E as far forward as possible and then adjusting the picture posi- tioning lever (or the focus coil if necessary)

21、as described below. Do not try to remove shaded corners with ad- justment of the ion trap. Be sure to readjust the ion trap after adjusting the picture positioning lever or re- positioning the focus coil. The 16TP4 picture tube uses ion trap, part number 94A15-2; the 16RP4 tube uses ion trap, 94A15-

22、1. The part number is stamped on the ion trap magnet. The wrong ion trap may cause shaded corners or insufficient picture brightness. HEIGHT WIDTH Chassis Views Showing Adjuslmenl Locations. E (DEFLECTION YOKE COIL) PICTURE POSITIONING LEVER OSCILUTOR TUNING SLOG ADJUSTMENT Control Panel; CHANNEL an

23、d TUNING Knobs Removed. ADJUST THE ION TRAP In order to prolong the life of the picture tube, f* it is important that this adjustment be made on every receiver upon installation or servicing. B ION TRAP BLUE SLEEVE . FUSE I XINSIOE HOUSING MODELS 36R37, 36Rli5, 36R1+6, Oh. 21B1, 21C1, Radio Ch. 5D2

24、RadioFans.CN If the picture is tilted, loosen the wing nut H on the deflection yoke coil and slightly rotate the yoke E until the picture i s straight. Before tightening the wing nut, be sure that the yoke is moved as far forward as possible, otherwise corners of the picture may become shaded. Pictu

25、re Tilted; Adjust Deflection Yoke Coil. If the picture is off center, it can be centered by using the picture position- ing lever, and when necessary, re-posi- tioning the focus coil around the pic- ture tube neck. Fol- low the instructions given below. Note that the picture Picture Not Centered; Ad

26、just .Picture Positioning Lever. positioning lever can be moved sideways, or up and down. Picture Slightly Off Center a. Adjust ion trap as instructed on preceding page. b. Slightly loosen the screw A which locks the picture positioning lever to the focus coil, adjust the lever for correct picture c

27、entering. c. Readjust the ion trap. Picture Greatly Off Center a. Adjust ion trap as instructed on preceding page. b. Slightly loosen the two screws B which hold the focus coil to the yoke bracket. Center focus coil around the tube neck; tighten screws. c. Loosen the screw A and center the picture w

28、ith the picture positioning lever. If the picture cannot be centered with the lever, it may be necessary to locate the focus coil slightly off center and then center the picture with the picture positioning lever. d. Readjust the ion trap. Difficulty in Centering Picture or Eliminating Shaded Corner

29、s a. Loosen screws G, then move the yoke support bracket forward until rubber grommet F is firmly against the flare of the picture tube. b. Push the deflection yoke coil E as far forward as possible. In some cases, it may be necessary to loosen the two yoke bracket support screws D at the sides of t

30、he upper mounting bracket, move the bracket up or down, and then move the deflection yoke coil as far forward as possible. Shaded corners may also result from use of the wrong ion trap. The 16TP4 picture tube uses ion trap 94A15-2; the 16RP4 picture tubes uses ion trap 94A15-1. The part number is st

31、amped on the ion trap magnet. SCHEMATIC NOTES LJJ.LU.UJ etc. are run numbers and indicate a production change. Run numbers are rubber stamped at rear of chassis. rnent connections. etc. indicate alignment points and align- TV VOLTAGE DATA (Voltages given on schematic diagram) PICTURE control turned

32、fully clockwise. CHANNEL con- trol set on an unused channel. Other front controls set at approximately half rotation. Vert. Lin. and Height set at approximately half rotation. Voltages marked with an asterisk * will vary widely with control setting. In combination models, B-f- voltages in TV chassis

33、 will be slightly higher when set is switched to radio position. Alter- nate voltage readings for radio and TV are shown for sound output tube V204 (6V6GT). Line voltage 117 volts AC. Voltages measured with a vacuum tube voltmeter between tube socket terminals and chassis, unless otherwise indicated

34、. Voltages at VlOl, V102, V306 measured from top of socket with tube removed. 858n I6TP4 OR 16RP4 OSC. i MIXER 6J6) JF AMP. 6AG5, 6BC56CB6 SOUND AMP. SOUNC OUTPUT VERT. OSC./6SN7 4 SYNC. 1NV.V CT SOUND IF 5U4 RECTIFIER V 6 6BQ6, HOR. OUTPUT TJ IA1 AMP. 250V. FUSE Top View of Chassis. John F. Rider R

35、adioFans.CN Antenna disconnected from set with terminals shorted. Under operating conditions, AGC (Automatic Gain Control) voltage developed at pin 1 of V301 (6AU6) should measure approximately 3 volts. This voltage depends on picture signal strength and Picture control setting. MODELS 36R37, 36RJ4-

36、5, 36RI+6, Ch. 21B1, 21C1 CAUTION Pulsed high voltages are present on the cap of the 6BQ6GT tube, and on the filament terminals and cap of the 1B3GT tube. NO ATTEMPT SHOULD BE MADE TO TAKE MEASURE- MENTS FROM THESE POINTS UNLESS SUITABLE TEST EQUIPMENT IS AVAILABLE. Picture tube 2nd anode voltage ca

37、n be measured from the 2nd anode connector and should be taken only with a high voltage instrument such as a kilovoltmeter. 2nd anode voltage is ap- proximately 12.5 KV. Proper filament voltage check of the 1B3GT tube may be made by observing filament brilliancy as compared with that obtained with a

38、 1.5 volt dry cell battery. IMPROVED NOISE IMMUNITY IN THE HORIZONTAL SYNC AND 21C1 CHASSIS RAD|O VOLTAGE DATA (Voltages given on schematic diagram) Line voltage 117 volts AC. Voltages measured with a vacuum lube voltmeter, between tube terminals and chassis. Voltages measured with band switch on FM

39、 position, unless otherwise indicated; an AM reading is given where difference is significant. Volume control set at minimum. Dial turned to low frequency end. Antennas disconnected. A When R602 is 240 ohms, voltage on pin 1 of V601 is 152 volts, pin 2 is .5 volts, pin 6 is 152 volts and pin 8 is 1.

40、9 volts. When R602 is 1500 ohms, voltage on pin 1 of V601 is 160 volts, pin 2 is 3 volts, pin 6 is 160 volts and pin 8 is 3 volts. CIRCUIT OF 21B1 In some areas where the noise level is high, the noise peaks may affect the sync sircuit and cause the picture to shake horizontally or lose horizontal s

41、ync. A change in resistor value and an additional filter in the sync circuit has- been incorporated in late production to reduce this trouble. The circuit change began with run 2 of 21B1 chassis and run 5 of 21C1 chassis. Early production receivers may be modified by following the pro- cedure given

42、below: 1. Locate a 9 lug terminal atrip adjacent to the vertical output transformer. 2. Remove R323 (8200 ohms) from lugs 1+ and 6. 3. Connect an 18,000 ohm 1/2 watt resistor (part number 60B8-183) between lugs 5 and 6. li. Connect a l i j . 0 |_i,(j,fd condenser (part number 65B1-26 with a 2?OK 1/2

43、 watt resistor, (part number 60B8-27i|) in parallel between lugs ij. and 5 Tl.02 VERTICAL OUTPUT TRANSFORMER REMOVE R323N 8.2K ADD 2?OK 1/2 WATTADD llj.0 MMFD ADD l8K,l/2 WATT (REPLACES R323) 5 o m ro o RadioFans.CN 6BA66BAi lsnr ,*ri, TNZIO.IF-i V602 / T602_ V603 F - /* i, s ,j T * siHirvM ,/,-) N=

44、 ft. !-/( p / T SJI .J 6AU66AL5 lUIHEf S1ITCH SEIIHt SEIECIS Pill OF COILS LIOI 1 1102 FOR CH1MF.L DESIRED. I 1506 J09 tu nifi mrtcfs f/cfrr mtr wit 1. OR 6CB6l l - 6AU6 , ; 6AU6 2HD. VIDEO IF - 3RD. VIDEO IF T V30Z V303 Schematic for 21 Bl, 21CT Television Chassis; 5 RECORD CHANGERS: Model RC500, S

45、ee page ROD.CH.21-1; Hodel RC550, See page GD.CH.21-9. John F. Rider RadioFans.CN A6 -MHO.OET. 03 Hern 6AL5 FI HATH DEIKIOI V604 rue nmets C30) w/ w run :xifr. ii faarr ifwret F/KI 5D2 radio circuit and connections also shown. MODELS 36R37, 36RJ+5, 36R46, Ch. 21B1, 21C1, Radio Ch. $D2 a 70 r- H watt

46、 (part IMPOI This preliminary service data contains the compl television chassis and for the 5D2 (AM-FM) radio ch 36R45, 36R46. It contains alignment data for the tel This TV chassis uses a 16 rectangular picture ti (adjacent channel trap and improved sound take-off) to the 20X1, 20Y1, 20Z1 chassis.

47、 Sweep circuits ar Model RC500 or Model RC550 record changer is L 21B1, 21C1, 5D2 RESISTORS Sym. tRIOl R102 R103 R104 TR105 R106 R107 TR108 R109 R201 R202 R203 R204 R205 R206 R207 R208A R208B R209 R210 R211 R212 R213 R301 R302 R303 R304 R305 R306 R307 R308 R309 R310 R311 tTo me Description 3 900 ohm

48、s 1/2 watt 4, 700 ohms, 1/2 watt %Ts 82 ohms, 1/2 watt, carbon 1 000 ohms 1/2 watt 390 ohms, 1/2 watt . 250,000 ohms, Volume! 1,500 ohms, Picture/ (R208 includes switch SW501) 10 000 ohms 1/2 watt 5% 1,000 ohms, 1/2 watt 1 000 ohms 1/2 watt 1 , 000 ohms 1/2 watt . 47 ohms, 1 watt 18 000 ohms 1/2 wat

49、t 1 000 ohms 1/2 watt 68 ohms, 1/2 watt, carbon 10 000 ohms 1/2 watt 5% 1 000 ohms 1/2 watt 150 ohms 1/2 watt Par .98A QQ A QQ A , D98A Qfl A no A 98A QQ A RHR 60S 60B . .60B fiOR fifiR RflR . .75B GOB fiDR GOB GOB GOB . .GOB 60B . .60B . .GOB -GOB GOB GOB GOB GOB .fiOR secure proper high frequency character talized resistor only. t No. 45-16 45-17 45-18 45-19 45-20 45-21 45-18 45-20 45-67 8-474 28-31 8-102 8-391 7-103 7-103 8-473 11-16 8-475 8-154 8-473 8-105 14-331 7-103 8-102 8-102 8-102 14-470 8-183 8-102 28-44 7-103 8-102 8-151 istics, oj N