RCA-TK29-8TR29-Sams-88-9电路原理图.pdf
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1、PHOTOFACT* Folder RCA VICTOR MODELS 8TK29, 8TR29 (CH.KCS32, A, B, C, NT USING AM SIGNAL GENERATOR AND VTVM Connect two matched 100KO (t 1%) resistors in series from point toto chassis. The junction of these two resistors is alignment pointfXs shown on the schematic. Alternate loading is used on the
2、transformers during FM IF a ignment, that is, the primary of each transformer is shunted with 680 ohms while the secondary of the same transformer is being adjusted. When the primary is to be adjusted, the 680J3 resistor is used to shunt the secondary. This process is repeated for each transformer.
3、DUMMY ANTENNA . 01MFD . 01MFD . 01MFD SIGNAL GENERATOR COUPLING High side to pin 1 (Grid) of 6AU6 (V21). Low side to chassis. SIGNAL GENERATOR FREQUENCY 10. 7MC (Unmod. ) BAND SWITCH POS. FM (third position CW) RADIO DIAL SETTING Tuning gang fully open CONNECT VTVM DC Probe to Pointy Common to chass
4、is. DC Probe to Point Common to Poim$ DC Probe to Point) Common to chassis. ADJUST A46 A47 A48, A49, A50, A51 REMARKS Adjust for maximum deflection. Adjust for zero reading. A positive and negative reading will be obtained on either side of the correct setting. Use alternate loading as explained abo
5、ve. Adjust for maximum deflection. FM IF ALIGNMENT USING FM SIGNAL GENERATOR AND OSCILLOSCOPE Use frequ DUMMY ANTENNA Direct DUMMY ANTENNA 270SZ carbon res. ency modulated signal with 60 - modulation and 450KC sweep. Use 120 - sawtooth voltage n scope for horizontal deflection SIGNAL GENERATOR COUPL
6、ING High side to ungrounded tube shield floating over converter tube (V25). Low side to chassis. SIGNAL GENERATOR COUPLING High side thru 270J1 to un- grounded antenna terminal. Low side to chassis. SIGNAL GENERATOR FREQUENCY 10.7MC (450KC Sweep) SIGNAL GENERATOR FREQUENCY 106MC (Unmod. ) 90MC BAND
7、SWITCH POS. FM (third pos. CW) BAND SWITCH POS. FM RADIO DIAL SETTING Point of non- interference RADIO DIAL SETTING 106MC Tune for max. deflection. CONNECT SCOPE Vert. Amp. to Point Low side to chassis. Vert. Amp. to Point Low side to chassis. CONNECT VTVM DC Probe to PoinU Low side to chassis. ADJU
8、ST A46, A48, A49, A50, A51 A47, A46 ADJUST A52, A53 A54 REMARKS Disconnect stabilizer capacitor (C107). Ad- just for maximum amplitude and symmetry as per Fig 9. . Reconnect capacitor (C107). Adjust A47 so 10. 7MC occurs at center of crossover lines as per Fig 10. Slightly retouch A46 for maximum am
9、plitude and straightness of crossover lines. Continue with step 27. REMARKS Set A52 to maximum capacity. Expand or compress turns of A53 for maximum de- flection, then adjust A52 for maximum de- flection . Expand or compress coil turns for maximum deflection. Repeat steps 27 and 28 until no further
10、improvement can be made. FIG. 9FIG. 10 PAGE 1O RadioFans.CN HEIGHTFOCUSVERT. LIN. CABINET-REAR VIEW AGC THRESHOLD ADJUSTMENT WIDTH HORIZ. LIN. Turn the set on and tune in a local TV station. Turn the contrast control to maximum clockwise. Turn the AGC threshold control to maximum counter-clockwise,
11、a bend may appear in the upper part of the pic- ture. Turn the AGC threshold control clockwise until there is a very slight bend, or slight change of the bend which may already be there. Then turn the AGC threshold control slowly counter-clockwise until the slight bend, or change of bend disappears.
12、 Turn the contrast control to approximately the center of its range. The picture should be of proper contrast. _ r o IF=455 KC AM IF=I0.7 MC FM .s, ,-vvv-, oo J vW- D 88-9 AM-FM TUNER SCHEMATIC RadioFans.CN 9L lOVd RadioFans.CN 5 o CHASSIS BOTTOM VIEW-CAPACITOR IDENTIFICATION (VSC DIHMD 6CU18 60J18
13、S13QOW MO1DIA RadioFans.CN O a. RadioFans.CN 0 O to in CHASSIS BOTTOM VIEW-RESISTOR IDENTIFICATION (VSC IHITHD 6CX18 S13QOW MOiDIA V3d RadioFans.CN RCA VICTOR MODELS 8TK29, 8TR29 (Ch.KCS32,A,B,C,olation ;t Sync. Sep. Grid it Sync. Sep. Cathode ;t Sync- Sep. Cathode ;t Sync. Sep. Plate ;olation oltag
14、e Divider ?nc. Amp. Grid fnc. Amp. Plate id Sync. Sep. Grid id Sync. Sep. Cathode itegrator itegrator tegrator 3rt. Osc. Grid 3rt. Osc. Plate )ltage Divider jltage Divider rt. Peaking art. Output Grid =rt. Output Cathode =rt. Output Plate Decoupling liter iriz. AFC Grid 3riz. AFC Cathode jriz. AFC C
15、athode iriz. AFC Filter Network altage Divider altage Divider altage Divider Driz. Osc. Grid Driz. Osc. Transformer Shunt Driz. Osc. Transformer Shunt Driz. Osc. Plate Driz. AFC Filter Network irasitic Supp. Driz. Output Grid Driz. Output Grid Driz. Output Cathode ias Network Driz. Output Screen See
16、 Note 4 ilter VRecL Filament V Filter ?edback as Network-Wire Wound Her Network See Note 5 jcus Coil Shunt-Wire Wound See Note Iter-Wire Wound altage Divider-Wire Wound ias Network-Wire Wound jltage Divider .eeder ;eeder TRANSFORMER (POWER) ITEM No. Tl RAtING PRI. invAC at 2.05A SEC. 1 750VCT . 250A
17、DC SEC. 4 6. 3VAC at7.4A SEC. 2 5VAC at 3A SEC. 5 6.3VAC at 1. 6A SEC. 3 5 VAC at 2A REPLACEMENT DATA RCA PART No. 74046 STANCOR PART No. P-8153 (2) MERIT PART No. CHICAGO PART No. TP-355 Redrill mounting holes. TRANSFORMER (SWEEP CIRCUITS) ITEM No. T2 T3 T4 T5 T6A B T7 RATING DC RESISTANCE PRI. 125
18、n Tap at 90n 165n 33in Tap at 173O 52in 13. 5n 64. 6n 364n SEC. 36n 13100 SEC. 1 10. 8n Tap at .en SEC. 2 on 6. 9n REPLACEMENT DATA RCA PART No. 73576 73569 73570 73568 71420 73566 STANCOR PART No. A-8121 A-8117 A-8116 DY-1 MERIT PART No. A-4000 A-3035 CHICAGO PART No. TBO-2 TFB-1 TSO-4 NOTES Hor. O
19、sc. Trans. Vert. Block Osc. Trans. Hor. Output Trans. Vert. Output Trans. Hor. Deflection Coil Vert. Defection Coil Focus Coil Drill one new mounting hole. TRANSFORMER (AUDIO OUTPUT) ITEM No. T8 RATING IMPEDANCE PRI. 1 SEC. 5.8KSJ | 4.2n DC RES. PRI. soon SEC. .2en REPLACEMENT DATA RCA PART No. 7141
20、9 STANCOR PART No. A-3877 MERIT PART No. A-2930 CHICAGO PART No. RO-9 INSTALLATION NOTES Drill one new mounting hole n u 70 ft SPEAKER ITEM No. SP1A B SP2A B RATINGS FIELD RES. PM PM CONE DIA. 4 3/4 x 7 12 V. C. IMP. 4. 2!i V. C. DIA. 3/4 REPLACEMENT DATA RCA PART No. 73993 73635 73934 JENSEN PART N
21、o. QUAM PART No. 57A15 NOTES FILTER CHOKE ITEM No. LI RATINGS TOTAL DIRECT CURRENT .250A D. C. RESISTANCE 43O INDUCTANCE (0 CURRENT 1000 ./) 1. 3 Henries REPLACEMENT DATA RCA PART No. 73154 STANCOR PART No. C-2325 MERIT PART No. C-2991 CHICAGO PART No. TR-3300d INSTALLATION NOTES Drill one new mount
22、ing hole. fo o TO 70 i O / 9:00 COILS (RF-IF) ITEM No. L2 L3 L4 L5 L6 L7A B L8 L9 L10 LUA B L12 1,13 L14A B L15 L16 L17 LISA B L19 L20 L21 L22 L23 L24 L25 L26 USE Ant. Input Trans. IF Trap IF Trap Shunt IF Trap RF Grid RF Plate Trimmer RF Plate Trimmer RF Plate HF Plate RF Coupling Mixer Grid Trimme
23、r Mixer Grid Trimmer Mixer Grid Mixer Grid Osc. Plate Trimmer Osc. Plate Trimmer Osc. Plate Osc. Plate Osc. Plate Osc. Plate Trimmer Osc. Plate Trimmer Fil. Choke Fil. Choke Fil. Choke Conv. Trans. 1st Video IF Fil. Choke 2nd Video IF 3rd Video IF & Sound Take Off DC RES. PRI. .5n .sn .5SJ .5J2 on o
24、n on on on on on on on on on on on on on on on on on on .5SI .in on .in .in SEC. .2n on on REPLACEMENT DATA RCA PART No. 73578 73476 73475 73476 73633 73446 74110 73471 73460 73462 74109 73444 73470 73874 73444 74109 73468 73469 73874 74108 73443 73477 73477 73477 73448 73571 73477 73572 73573 MEISS
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