Zenith-Radio-Corp-T521W 电路原理图.pdf

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1、VOLUME R-16, MOST-OFTEN-NEEDED 1956 RADIO SERVICING INFORMATION eUAhi MODELS TS21F, G, R, W & Y CHASSIS ST03 3SX eooSSSft 455KC I2BE6 CONVERTER I2BA6 I.F. I2AT6 DET. AMP. _Jx_ 400v .05 WATT OUTPUT 50C5 PWR.AMP. 3 cidcol 3 Is TT VOLUME CONTROL SWITCH SH OWN IN PHC* POSITIO H if IlijiflJ1 35W4 . RECT.

2、 DENOTES CHASSIS DENOTES COMMON RETURN I2BE6 I2BA6 I2AT6 ALIGNMENT PROCEDURE Operation 1 STAMPED IN fioENTIPICATION CODE 2/3 TURNS AROUND LARGE PULLEY 2/2 TURNS AROUND SHAFT DIAL CORD DRIVE NOTES: ALL VOLTAGES MEASURED FROM COMMON RETURN TO POINTS INDICATED WITH AN A C , D.C. OR VACUUM TUBE VOLTMETE

3、R. ALL VOLTAGES ARC 0 C UNLESS OTHERWISE SPECIFIED. ALL RE9ST0RS i 20X TOLERANCE UNLESS OTHERWISE SPECIFIED USE ONUT ZENITH NON-INDUCTIVE ELECTROLYTIC CONOCNSERS FOR REPLACEMENT. IF A NY OTHER TYPE OF ELECTROLYTIC IS USED IT WILL SE NECESSARY TO ADD CS SHOWN IN DOTTED ONES. I.F TRANSFORMER NUMBERING

4、 STARTS WITH*I TERMINAL, AS FIRST TEIMNAL CLOCKWISE ANO ADJACENT TO MARKER AG VIEWED FROM BOTTOM OF CHASSIS- Connect Oscillator To Dummy Antonna Input $lg. Frequency S.t Dl.l At Trimmers Rurposo Convortor .5 Mfd. 455 Kc. 600 Kc. L3, L4, L5. For I.F. Align Grid L6 ment. On* Turn Loop CoupUd Loosoly t

5、o 1600 Kc. 1600 Kc. C1D Sot Oscillator to Dial Seal* 1400 Kc, 1400 Kc. CIB Align Antonna Wava Mognot Stag* A.C. CORO CLOCK 8 SWITCH LEADS RADIO-PHONOs SWITCH PHONO-r SOCKET -T2 2ND I.F TRANS. - L5 PRI. BOTTOM - L6 SEC. TOP -Tl 1ST. I.F.TRANS. - L3 PRI. BOTTOM -L4 SEC. TOP IIOV.A.C APPLIANCE SOCKET -CIB ANTENNA TRIMMER -CIO OSCILLATOR TRIMMER 179 收音机爱 好者资料库 RadioFans.CN