Motorola-VT105-Sams-67-13电路原理图.pdf
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1、PHOTOFACT* Folder MOTOROLA MODELS VT1O5, VT1O5M, VK1O6, VK1O6B, VK1O6M, VT1O7, VT1O7M CHANNEL SELECTOR VERT. HORIZ. HOLD CONTRAST BRIGHTNESS VOL. TONE ON-OFF SW. MOTOROLA MODEL VK-106 TRADE NAME Motorola Models VT-105.VT-105M.VK-106,VK-106B.VK-106M,VT-107,VT-107M, (Ch. TS-9,T3-9A,TS-9B,TS-9C) MANUFA
2、CTURER Motorola Inc., 4545 Augusta Blvd., Chicago, Illinois TYPE SET Television Receiver TUBES Twenty-Three (Ch. TS-9,TS-9B), Twenty-One (Ch. TS-9A), Twenty-Two (Ch. TS-9C) POWER SUPPLY 105-125 Volts, 60 Cycles TUNING RANGEChannels 2 thru 15. ACRATING: 2.1 Amps. 117 Volts Alignment Instructions Bloc
3、k Diagram Chassis Variations Disassembly Instructions Horizontal Sweep Adjustments Parts List and Description Photographs Cabinet-Rear View Capacitor Identification Chassis-Top View INDEX Page 6,7 Photographs (continued) 14 Oscillator Alignment Points RF Alignment Points Resistor Identification 16 1
4、5 15 15 ,17,18,19 19 12,21 3,11 Trans., Inductor and Alignment Identification Schematic Schematic (Chassis Variations) Tube Placement Chart Voltage and Resistance Measurements Page 7 10 13,20 4,9 2 22 5 8 28 oo ?* 1001 RadioFans.CN 12AU712AU7 J I RadioFans.CN MOTOROLA MODELS VT1O5, VT1O5M, VK1O6, VK
5、1O6B, VK1O6M, VT1O7, VT1O7M M3IA dOl SISSVHO RadioFans.CN CHASSIS BOTTOM VIEW-TRANS., INDUC PAGE 4 RadioFans.CN UCTOR AND ALIGNMENT IDENTIFICATION PAGE 9 RadioFans.CN VERT OSC. SYNC.AMP/ V8 VERT. OUTPUT SYNC SEP. U2AU7 TUBE PLACEMENT CHART PAGE 5 RadioFans.CN ALIGNMENT INSTRUCTIONS VIDEO IF ALIGNMEN
6、T Connect the negative terminal of a -3 volt battery to the mixer grid at the Junction of R12 and R13. Connect the positive terminal to chassis ground. Set the contrast control to give -5 volt bias. (Measure from center terminal to chassis.) DUMMY ANTENNA .01MFD .01MFD .01MFD .01MFD .01MFD .01MFD SI
7、GNAL GENERATOR COUPLING High side to pin 5 (Grid) of 6J6 (V2). Low side to chassis. tl tl SIGNAL GENERATOR FREQUENCY 23.6MC 26.4MC 22.9MC 25.7MC 21.9MC 24.7MC CHANNEL Any n CONNECT VTVM C Probe to Point Common to ssis. tt n ADJUST Al AS A3 A4 AS A6 REMARKS Adjust for maximum deflection. n n n tt n n
8、 tl n n tl n n Adjust for minimum deflection. Repeat step 4. Adjust for maximum deflection. OVERALL VIDEO IP RESPONSE CHECK Connect the synchronized sweep voltage from the signal generator to the to give horizontal deflection. DUMMY ANTENNA .01MFD SWEEP GENERATOR COUPLING High side to pin 5 (Grid) o
9、f 6J6 (V2). Low side to chassis SWEEP GENERATOR FREQUENCY 24MC (10MC Sweep) MARKER GENERATOR FREQUENCY 21.9MC 26.4MC TMAMKIFI CONNECT CHANNEL SCOPE Any Vert . Amp . to Point Low side to chassis. horizontal amplifier of the oscilloscope ADJUST REMARKS Check to see that response curve Is similar to th
10、at of Fig 1. 4. SMC TRAP ADJUSTMENT There .are three possible methods of adjusting this trap. One method Is done by tuning In a normal picture and adjusting trap A7 so the stippled or half-tone effect In the picture Is eliminated or minimized. The fine tuning control should be set on the center audi
11、o peak while this adjustment Is being made. Another method Is by feeding a 4. SMC unmodulated signal to pin 7 of SALS (V7) video detector and connecting an RF type electronic voltmeter across R41 (2nd video amp. grid circuit). Adjust A7 for minimum. The third method of using an oscilloscope with a d
12、etector probe may be accomplished as follows: DUMMY ANTENNA .01MFD SWEEP GENERATOR COUPLING High side to pin 7 of SALS (V7). Low side to chassis. SWEEP GENERATOR FREQUENCY Off MARKER GENERATO FREQUENCY 4. SMC (400% Mod.) r-UiKiwei CONNECT CHANNEL SCQpE Any Vert. Amp. thru detector probe to pin 6 (pl
13、ate) of 12AU7 (V8). Low side to chassis. ADJUST REMARKS A7 Adjust for minimum amplitude. SOUND IF ALIGNMENT Chassis TS-9C contains an additional sound IF stage but the transformer added Is fixed tuned and does not necessitate a change In alignment procedure. DUMMY ANTENNA .01MFD SIGNAL GENERATOR COU
14、PLING High side to pin 5 (Grid) of 6J6 (V2). Low side to chassis SIGNAL GENERATOR FREQUENCY 21.9MC CHANNEL Any CONNECT VTVM DC Probe to Point J Common to chassis. ADJUST A8,A9 REMARKS Adjust for maximum deflection. Detune the discriminator transformer secondary by turning All out approximately 2 ful
15、l turns. .01MFD .01MFD High side to pin 5 (Grid) of 6J6 (V2). Low side to chassis n 21.9MC Any Probe to Point Common to ssis . A10 All Adjust for maximum deflection. Adjust for zero reading. A positive and negative peak Is obtained on either side of the correct setting. RF ALIGNMENT Connect the sign
16、al generator to the antenna terminals of the receiver through two resistors. The low side of the generator should be connected through 1502. The high side should be connected t hrough a resistor of 1502 minus the signal generator Impedance. For Instance, If the generator Impedance is 502, the resist
17、or should be 1002. Leave the fine tuning control set at the midpoint of its electrical range during the oscillator and RF alignment. Set the contrast control for -3 volts bias. (Measured from arm of control to chassis). The antenna adjustments on the high band Is made at 195MC for channels 7,8,9,10,
18、11,12 and 13. This adjustment has enough bandwidth to work effectively over all these channels. The low band channels have Individual antenna adjustments . DUMMY ANTENNA See Instruc tlons above n SIGNAL GENERATOR COUPLING Across antenna terminals . SIGNAL GENERATOR FREQUENCY 215.75MC 209 .75MC 203.7
19、5MC 197.75MC 191.73MC 185.75MC 179.75MC 87.75MC 81.75MC 71.75MC 65.75MC 59.75MC CHANNEL 13 12 11 10 9 8 7 6 5 4 3 2 CONNECT VTVM Probe to Point Common to assis. ADJUST A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 REMARKS Adjust for zero reading. A positive and negative reading will be obtained on
20、 either side of the correct setting. n 9. 10 11 12 13. 14. PAGE 6 RadioFans.CN ALIGNMENT INSTRUCTIONS CCONTJ 15. 16. 17. DUMMY ANTENNA 11 SIGNAL GENERATOR COUPLING n SIGNAL GENERATOR FREQUENCY 214MD 208MC 202M3 196MC 190ft 184 MC 178MC 86MC 80MC 70MC 64HC 58MC 195MC 86fC 80MC 70MC 64MC 58MC CHANNEL
21、13 12 11 10 9 8 7 6 5 4 3 2 10 6 5 4 3 2 CONNECT VTVM n ADJUST A24, A25 A26.A27 A28.A29 A30,A31 A32.A33 A34.A35 A36.A37 A38.A39 A40,A41 A42.A43 A44.A45 A46,A47 MB 149 150 151 152 153 REMARKS Unscrew one adjustment until the circuit Is appreciably detuned. Adjust the second slug for maximum deflectio
22、n. Then adjust the first slug for maximum. Do not retune the other slug. Adjust for maximum deflection. Adjust for maximum deflection. A49 Is omitted on TS-9C. Adjust for maximum deflection. FIG. I 22 00 V3 Si I! en OSCILLATOR ALIGNMENT POINTS A13 PAGE 7 RadioFans.CN VOLTAGE AND RESISTANCE MEASUREME
23、NTS m oo VOLTAGE READINGS Itflm V 1 V 2 V 3 V 4 V5 V 6 V7 V 8 V9 V 10 V 1 1 V 1 2 V 13 V 14 V 15 V16 V17 V 18 V 19 V20A V21A V24 Tub. 6AG5 6J6 6BA6 6BA6 6BA6 6AG5 6AL5 12AU7 6AU6 6AU6 6AU6 6T8 6V6GT 6SN7GT 6SN7GT 6SN7GT 6BG5G 5V40 1B30T 5U4G 5I3GT 10BP4 Pin 1 -3.4VDO 150VDC -20VDC -20VDC 0V 0V 0V 12
24、5VDC 0V 0V -.5VDC -.7VDC 0V OV 4ov 4-.7VDC 43VDC 0V Pin 2 ov 87VDC OV OV OV 1VDC -1.2VDC -.5VDC OV OV OV -.8VDC 6. 3 VAC 460VDC 4360VDC 4133VDC OV 390VDC Pin 3 6.3VAC OV 6.3VAC 6.3VAG 6.3VAC 6.3VAC 6 .3VAC OV 6 .3VAG 6.3VAC 6 .3VAC -9 .3VDC 270VDC 40V 410VDC 419.5VDC 417VDC 411VDC 43VDC Pin 4 ov 6.3
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