John-Meck-Industries-Inc-PM-5C5-P 电路原理图.pdf

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1、MANUAL OF 1948 MOST-OFTEN-NEEDED RADIO DIAGRAMS JOHN MECK INDUSTRIES, Inc., CHASSIS RC-5C5-P or PM-5C5-P L* i R7 C9 XCG - n*i R9 I TS SPKR Not* X Sot phonogroph connection 50l6 I2SA7 I2SQ7 Q| 50A5 1007 I486 I 3525 I2SK7 35Y4 14A7 T T cioa -i- 3SZ5 * 35Y4 Circuit Syobol Part Number Circuit Symbol Cl

2、C2.C9.Cll C3.C5.C8 C4 C6.C7 CI0A.CID8 u.u Rl R2 R3 R4 R5 R6 R7 CM-15250 CP-145031 CP-14103 CM 15301 CM-15251 CL-IDOOl VP-10000 RC-32002 RC-34DDI RC-32004 VCH0I05 RC-3ID05 RC-32502 RC-35003 Condenser-Mlea, Condenaer-Paper, Condenter-Paper, Condenser-Mica, Condenser-Mica, Condenser-Elect. Tuner-Parmea

3、biI Resistor-Carbon, Resistor-Carbon, Resistor-Carbon, Control-Volume, Resistor-Carbon, Resistor-Carbon, Resistor-Carbon 25 mnf., 500 volt , 0.05 nfd., 400 volt , 0.01 mfd., 400 volt 3DD mnf., 500 volt 250 mmf., 500 volt ./ 20/20 mfd., 150 volt ity, assembly , 20,ODD ohms, i watt , 4000 ohms, watt ,

4、 2 megohms, watt I megohm withswitch , |0 megohms, i watt , 250,000 ohms, watt i, 500.000 ohms, i watt RC-3I5DD Resistor-Carbon, 150 ohms, i watt RC-3I00I Resistor-Carbon, 1000 ohms, watt SR-10000 Speaker-P.M. 4” round less T3 TS-IDDD0 Transforner-lst. I.F. TS-lOODl Transformer-2nd. I.F. TO-10000 Tr

5、ansformer-Output PHONOGRAPH MODEL PRS-ID0D0 Motor-Phono, with turntable PA-|0000 Pickup-Crystal RC-3IDD4 Resistor-Carbon, l megohm, watt RC-37503 Resistor-Carbon, 750,000 ohms, 2 watt VS-10000 Switch-Radi0,phono VOLTAGE TABLE - U*e high resistance voltmeter of |000 ohms per volt 78 -7 to-|2 to-1. 2

6、0 0 -.8 to-1.2 78 0 78 115 AC I2AC - 65 to-1.2 24AC 78 I2AC 0 36AC 4 to 5 115 AC NO iAv-s r EARLY MOOEL I4Q7 24AC 78 14A7 36AC 78 1486 0 55 50A5 B2AC 95 35Y4 II5AC II5AC 78 78 .9 to-1.2 78 78 -7 to-12 0 -.65 to-J.2 0 0 -.8 to-|.2 0 -.8 to-1.2 0 0 100 * 7 _LATE MOOEL_| I.F. ALIGNMENT: The step-by-ste

7、p routine given below should be carefully followed; phonograph connection 1. The signal generator must be set at 455 kilocycles. ”“1” 2. Connect the output meter so that the output can be determined. 3. Connect the high side of the signal generator output to the antenna lead of the tuner, the white

8、wire. The low side of the signal generator output lead is connected to the chassis 4. TurnUthefoVume control on full and turn the dial drive shaft so that the slugs of the tuner 5. AdjusV the for l?F. trimmers, tuning each carefully to get the maximum deflection of the output meter. Reduce the signa

9、l generator output if the output meter goes off scale. 6. Repeat all four adjustments since the adjustment of each I.F. trimmer may effect the others to a certain extent. OSCILLATOR and R.F. ALIGNMENT: 1. Connect the high side of the signal generator output to the insulation covering of the an- 2. S

10、et thesi gal generator to 1680 k i 1 ocycles with the slugs of the tuner all the way out against the stop. Adjust the oscillator trimmer, right hand trimmer screw, for maximum reading on the output meter. . - . . ,on 3. Set the signal generator at 1120 kilocycles and turn the dial drive shaft until

11、the 1120 kilocycle note is heard. Adjust the R.F. trimmer, left hand trimmer, for maximum reading on M the output meter. Set the dial pointer on 1120 kilocycles on the dial scale. By aligning J the R.F. section at 1120 kilocycles the overall alignment will be very good. J 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN