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RCA Victor TRK-12, Manual

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Summary of Contents for Victor TRK-12

Page 1: ...ve channel Television Receivers and thrcc band broadcast radio receivers enclosed in handsomely styled modern cabinets Features of the Tele vision receiver include Twelvc inch Kinescope Styrol humidity resisting r f and i f transformer forms black and white pictures single station selector switch temperature com pensated condensers iron core i f and r f tuning double Model TRK 9 Chassis KC 4A KK 7...

Page 2: ...mping 21 RCA 6N7 Vert Osc Discharge 22 RCA 6J5 Vert Output 120 TRK 90 In KK 7F KK 7J TRK 120 and KK 7H TRK 90 Television Socket Power Units 23 RCA 5U4G 60 cycles without D C Restorer RCA 5T4 60 cycles with D C Restorer or RCA 5T4 50 cycles Low Voltage Rectifier TELEVISION CHANNELS Selector Switch Positions 1 50 to 56 me 3 66 to 72 me 2 60 to 66 me 4 78 to 84 me 5 84 to 90 me PICTURE SIZE Approxima...

Page 3: ...nation of the spot which appears on the Kinescope before the sweep circuits have started functioning Contrast and Brightness Controls The inner I section of the Contrast Brightness controls is the Contrast control and varies the black and white tones of the picture being received Too much contrast gives blurred details and a lack of half tones while too little contrast makes it all half tones or g...

Page 4: ... 8 It may be necessary to rotate the Kinescope within the limits allowed by the high voltage second anode lead with re spect to the mask in order to obtain proper masking of the Figure 3A Cabinet Wiring Model TRK 9 TRK 90 D A TA edges on the Kinescope screen Before rotating the Kine scope the screws holding the yoke mounting block should be loosened so that the Kinescope neck will not be forced 9 ...

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Page 6: ...y for the proper alignment of these receivers the alignment will not dc covered in this service note Refer to the booklet Practical Television by RCA for de tailed explanations of circuit operation in a Television re ceiver Service Hints 1 Poor Horizontal Distribution of the picture elements may be due to a 6L6 tube RCA 6L6 tubes of known recent manufacture are the only tubes recommended for the H...

Page 7: ...n has been observed on a Television receiver A temporary transmission line can be run between receiver and the antenna allowing sufficient slack to permit moving the antenna Then with a telephone system cori necting an observer at the receiver and an assistant on the roof to find an antenna location the antenna can be posi tioned to give the most satisfactory results on the received signal A shift...

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Page 11: ...Figure 10 Schematic Diagram TRK 90 and TRK 120 W ithout D C Restorer ...

Page 12: ...izontal damper tube 11 No picture weak picture If the station s sound is re ceived it is an indication that the oscillator and first detector are functioning Run an RF sweep into the antenna and check with a CRO for overall response at the picture 2nd detector load resistor If there is no response check the picture IF tube s and circuits If response at the load resistor is normal remove the sweep ...

Page 13: ...s as horizontal bars o f varying density and these vary in step with the speech or music The bars disappear when the voice or music stops Continued c Turn the trimmer for best sound quality This should correspond to approximately half capacity of tnie trimmer d Turn the trimmer toward maximum capacity If the slope of the sound IF response curve is narrow this will move the beat on to the_ peak of ...

Page 14: ...PAGE Z 6 6 C PAGE 2 6 7 C TRK9 TRK90 TRKI2 TRKI20 1 TRK9 TRK90 TRKI2 TRKI20 Figure 13 Video Chassis Wiring TRK 9and TRK 12 Without Picture AVC ...

Page 15: ...Figure 14 V ideo Chassis Wiring TRK 90 and TRK 120 Without D C Restorer ...

Page 16: ... in a definite frequency band c Diathermy This varies in intensity depending on proximity from a faint horizontal herringbone streak to a solid black bar If the diathermy equipment is on the same power supply as the television transmitter the interference will be stationary Otherwise it will travel up or down on the picture In the latter case if the interference is severe the vertical oscillator m...

Page 17: ...3 2 X I DEFLECTING YOKE PROTECTIVE SLEEVE DO NOT REMOVE FROM TUBE CONICAL METALLIC SHIELD SLOT FOR WING NUT O UTER SHIELD WING NUT 1 0 3 2 INNER SHIELD DEFLECTING YOKE SHIELD ASSEMBLY M 9 1 1 2 6 Figure 18 Assembly Details Showing Kinescope and Deflecting Yoke Shielding ...

Page 18: ...5 High voltage power transformer T 6 changed to T 9 6 Resistor R 165 is added TRK 120 only 7 Inductance L 50 is 100 ohms in these models 8 An RCA 5T4 is used in these models as low voltage rectifier In addition Kinescope shielding is provided as follows 1 A metallic conical section is installed in the cabinet to shield the Kinescope bulb 2 A double metallic cylindrical section is installed with th...

Page 19: ...e models rukdmm to uo oe s T o ta mm a tOA M TOK tQ UO WITH Dc t Tp ta WTC t LV BlCTintS It tu t IHTtK HVlJO W ITHOUT OCBtSTOttt tv ttcnnn it tT M 0T t l q OOOAMTOK tQ ilo without tcm o m out i t o o o o a M 3TJ BtłtłTOH It Mitt m TtH tQ 1to ms cM iuta i with a c u i r o t n C A U T IO N DISCONNECT BOTH OF THESE LEADS ANO CONNECT THe TERMINAL OF C 114 TO GROUND BEFORE MAKIN6ANY Me a s u r e m e n ...

Page 20: ...olts 25 amp One Mazda No 47 6 3 volts 1 5 amp The Mazda No 47 is the electric tuning set up lamp located at center of dial 105 125volts 50 60cycle P ower O u tpu t Undistorted Maximum Loudspeaker RL 70F 5 10 watts Type 12 inch electrodynamic 12 watts Voice Coil Impedance 2 2 ohms at 400 cycles General Radio receiver chassis No RC 427 is used in RCA Victor Television Console Model TRK 12 RC 427A in...

Page 21: ...S ENERGIZED AND THE ROLLER ENGAGES THE DISC DAMPER 3 2 0 9 3 KNOB SHAFT KNOB SHAFT PULLE Y 31271 KNO0 SHAFT DRIVE GEAR ANO HUB 31239 LUBRICATE KNOB SHAFT BEARINGS WITH PETROLEUM JELLY USE LIGHT MACHINE OIL AT MOTOR BEARINGS PUSH BUTTON ADJUSTER PINS PILOT LI6HT Color of Lead Color of Lead Station To Station Setting Station To Station Setting Button Contact Button Contact No 1 No 6 Red No 2 No 7 No...

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Page 23: ...AGE 2 7 6 C TWO TRK90 TRKI2 TRKI20 c a 1 w g a o T3 c ft K 42 ffj w 1 42 o o U e e 3 8 e p l s p S i J a j c q 8 g u 5 S 8 c 2 K 3 2 8 rt t 5 w g ft 0 6 2 o o 42 c v 2 q 6 g 8 2 2 g 2 W M S HiS 3 VldG OX ...

Page 24: ...120 130 140 S50 160 170 180 IONOON ICMINRCTAOV MADMD BO BROUN M U kO O m u y f Ą taeUN TOKYO PITTMUROH LONDON SCHHTY LONDON KOMI PARIS BfRLIN PITTSPOH N U IZ IN 25M PRA O U I AMTR 19M BUS BBUN LONDON U tU N PimtUROH N YORK PARIS LONDON SCMHTY 1 6 M N U IZ IN 1 3 M N IW YORK 550 600 700 800 1000 1200 1400 1600 2 5 120M TROPICAL RROA0CAST AMIRICAN POLICI AMOtAFT 90M TROPICAL AMATO 60M AMOtAFT KHABAR...

Page 25: ...fastening a piece of wire to the gang condenser frame and bend the wire so that it points to tnie O mark on the calibration scale when the plates are fully meshed Dial Indicator Adjustment After fastening the chassis in the cabinet attach the dial indicator to the drive cable with indicator approximately 1 16 inch above end dots at low frequency ends of bands with gang condenser fully meshed See t...

Page 26: ...ck No 31048 plug to fit the jack Figure 31 Functions of Feedback Switch T R K 9 and TRK 12 only Feedback Switch S8 and S9 TRK 9 and TRK 12 only Counter clockwise position with feedback Clockwise position without feedback 1 Provides inversed feed back by connecting part of secondary of output transformer in cathode of 6J5 2nd audio tube 1 Removes reversed feed back and grounds cath ode of 2nd audio...

Page 27: ... condenser located on range switch C 9 Control Dual 1 2 meg and 30 000 ohms Ver tical hold and Horizontal hold controls R106 R 9 2 STOCK No 33206 33210 33162 33209 33207 33208 33002 33383 4574 16836 32723 14671 35568 14074 14439 13428 13454 13219 30499 35567 14720 14993 12267 14499 31920 12194 11863 13486 13031 12312 30150 12955 35943 30146 31789 DESCRIPTION 13097 13594 35944 36714 14284 13998 127...

Page 28: ...ord Band indicator and variable condenser drive cord i Core Core and stud for 1st 2nd or 3rd I F transformer Damper Flywheel for rear end of motor shaft 32096 32091 31273 31239 31532 31304 11891 31969 12493 31271 31280 31272 14720 12267 12312 14559 12695 12738 13477 12454 12266 12412 12286 14560 14020 13638 12199 18020 12486 12013 13730 12679 31548 5042 14350 31681 31364 13871 31251 14278 31279 13...

Page 29: ...3225 4577 33244 33166 32816 12493 4574 16836 31542 31287 31306 4560 35032 33517 14270 MISCELLANEOUS ASSEMBLIES 30330 33362 31358 33676 33480 Button Station selector push button Cable 17 J inch shielded audio lead with plugs X6 X18 Model TRK 9 and TRK 90 only Cable 38 inch shielded audio lead with plugs Model TRK 12 and TRK 120 only X6 X18 33384 31622 31478 9857 DESCRIPTION Cable Kinescope cable an...

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