Sears-Roebuck-and-Co-52840400 电路原理图.pdf

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1、VOLUME R-16, MOST-OFTEN-NEEPEP 1956 RADIO SERVICING INFORMATION Sears, Roebuck I-f 300 uv. R-f with standard loop; at 600 Kc 800/m; at 1000 Kc 600 uv/m; at 1400 Kc 500 uv / m. For I-f alignment use .05 mfd. as Dummy from Generator hot lead to mixer grid. Connect low side of generator to floating gro

2、und. For R-f alignment use radiating loop. El Position of Variable Open 1400 Kc 600 Kc Generator Frequency 455 Kc 1400 Kc 600 Kc Adj. Trimmers (in order shown) Al, A2, A3, A4 A5, A6 Check Point Trimmer Function I, F, Osc. Ant. TUBE LAYOUT 135 收音机爱 好者资料库 RadioFans.CN VOLUME R-16, MOST-OFTEN-NEEDED 19

3、56 RADIO SERVICING INFORMATION Sears, Roebuck & Co. Chassis 528.40500, Catalog Nos. 6056A and 6057A L2 0SC1LLATO* COIL VALUES or CAPACiTOPS IN WfO UNLESS OTHERWISE NOTCO t. ALL RESISTORS 1/2 WATT UNLESS OTHERWISE NOTED S. V0LTA4ES MEASURED MOM POINT iNOICATEO TO 6A0UMD WITH 20,000OHM/VOLT M(TEN. RAD

4、IO * PHONO SWITCH IN NA00 POSITION ON IITV AC .MOLINE * these pants in cenamic unit, MEASUNEO With vtvm. ALIGNMENT PROCEDURE SWITCH ON VOL CONTNOL POSITION OP TUNE* GENERATOR FREQUENCY DUMMY ANTENNA GENERATOR CONNECTION TRIMMER ADJUSTMENT TRIMMER FUNCTION open 455 KC .1 mfd. pin 7 12BE6 T1 and T2 to

5、p and bottom I.F. open 1630 KC .1 mfd. pin 7 12PE6 C3B Oscillator 1400 KC 1400 KC HAZELTINE TEST LOOP C2* Antenna Located an Antenna. ri Alignment Information for Chassis 528.40400 (see preceding page for circuit) POSITION OF TUNER GENERATOR FREQUENCY DUMMY ANTENNA GENERATOR CONNECTION TRIMMER FUNCT

6、ION TRIMMER ADJUSTMENT Open 455 KC 0.1 mfd. 12BE6 pin 7 T2 (top & bottom) 2nd I.F. Open 455 KC 0.1 mfd. pin 7 12BE6 T1 (top & bottom) 1st I.F. Open 1610 KC 0.1 mfd. pin 7 12BE6 C1C (trimmer) Oscillator 1400 KC 1400 KC Hazeltine test laap C1B (trimmer) R.F. 1400 KC 1400 KC Hazeltine test laap CIA (trimmer) Antenna 136 收音机爱 好者资料库 RadioFans.CN