Zenith-Radio-Corp-M512C 电路原理图.pdf

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1、VOLUME R-26, MOST-OFTEN-NEEDED 1966 RADIO SERVICING INFORMATION ZENITH RADIO CORPORATION MODELS M512B, C & W CHASSIS 5M13 _3BX FROM 600T0455KC MX FROM 455KCT0400V . 35 X AT _ .05 WATT OUTPUT V3 I2AV6 DET. AMP. ty, 7X AT WOO._ .05 WATT OUTPUT 1 V4 50C5 PWR.AMP. (100- 264) HD- Rl 1500K 2 TURNS AROUNO

2、SHAFT(CW) C5 A.C A M/2 TURN AROUNO LARGE PULLEYCCW) VOLUME CONTROL DIAL CORD DRIVE SHQWnIn FUU COUNTERCLOCKWISE POSITION * ALTERNATE PARTS WHEN U! IS NOT USED SEE SCHEMATIC BELOW ,_ I2AV6 (V3) 117 VA C Tl B T2 marker code 50C5(v4) UETE5 COLOR CODE T2,2ND I.F TRANSFORMER L5,PRIMARY BOTTOM- L6, SECOND

3、ARY TOP i / NOTES: ALL VOLTAGES MEASURED FROM CHASSIS TO POINTS INDICATED WITH A VACUUM TU5E VOLTMETER. USE ONLY ZENITH NON-INDUCTIVE ELECTROLYTIC CONDENSERS FOR replacement. IF ANY OTHER TYPE OF ELECTROLYTIC IS USED IT MILL BE NECESSARY TO AOO C6 SHOWN IN DOTTED LINES. I.F. TRANSFORMER NUMBERING ST

4、ARTS WITH Hi TERMINAL AS FIRST TERMINAL CLOCKWISE FROM MARKER COOE. TERMINAL AS VIEWED FROM BOTTOM OF CHASSIS. I.F. FREQUENCY 155 KC TUNING RANGE S35 - IC20 KC ALL RESISTORS J20J TOLERANCE, 1/2 WATT, CARBON UNLESS OTHERWISE SPEC IFIE 0. A DENOTES CHASSIS -ti.ist i.f. transformer -L3, PRIMARY BOTTOM

5、-L4, SECONDARY TOP rLZ,OSCILLATOR COIL ON Ul SECTION LEADS LINE UP ACCORDING TO THE PART NO AS SHOWN 105-43 12 3 45 6 7 -ClB, ANTENNA TRIMMER -Cl D, oscillator trimmer VOLUME CONTROL * ALIGNMENT PROCEDURE CONNECT OPERATION OSCILLATOR TO DUMMY ANTENNA INPUT SIG. FREQUENCY SET DIAL AT TRIMMERS L3,4,5.6 PURPOSE Converter Grid One Turn Loop Coupled Loosely to Wave Magnet 455 Kc. 600 Kc. 1600 Kc. 1600 Kc. 1400 Kc. 1400 Kc. For I.F. Align ment. Set Oscillator to Dial Scale Align Antenna Stage 157 收音机爱 好者资料库 RadioFans.CN