Westinghouse-Electric-Corp-H-538T4 电路原理图.pdf

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1、VOLUME R-16, MOST-OFTEN-NEEDED 1956 RADIO SERVICING INFORMATION Westingliouse CHASSIS V-2239-1, MODELS,H-523T4,H-524T4,H-525T4 (BLACK) (IVORY) (CORAL) CHASSIS V-2239-2,M0DELS,H-538T4,H-539T4,H-540T4 (BLACK) (IVORY) (CORAL) The V-2239-1 chassis is basically the same as the V-2239-2 chassis, except th

2、at a clock is used with the V-2239-2 chassis and not with the V-2239-1. In the V-2239-1 chassis the off-on switch is ganged with the volume control and in the V-2239-2 chassis the off-on switch is part of the clock mechanism. 50C5 is AlXMO OUTPUT OUTPUT TRANS. 1 , . , 30*_ 1 . ( GRN WIRE f TO U .WHI

3、TE WIRE %2au6*r ,/y I CLOCK MECHANISM J CIRCUITRY DIFFERENCE FOR V2239 C i r i t Al - I2AV6 f 3 _ 1 isocs5 -z * V 5V 93V ,?W Lt OSC. COIL C9-. 0 OSC. TRIM. Tl PRI TOP SEC. BOTTOM Zl CONSTRUCTION R4 VOLUME CLOCK CONTROL alignment It is rscommsnded that the chassis be isolated from the power line by m

4、eans of an isolation transformer. While making the following ad|ustments, keep the volume control set for maximum output and the signal generator ontenuated os much os possible. Connert VTVM across voice coil. Step I Connect Signal Generator 1 To: Stotor of tuning capacitor (A) through o200 mmfd. cap acitor ana low side to B-. 2. Radiated signal Radiated signal S I8T3 P 2 o o v g | 8 T uning Capac it or Adjust for Maximum Output Minimum capacity Top ond bottom slugs of Tl Minimum copacity Oscillator trimmer (D) 1400KC Antenno trimmer (B) 收音机爱 好者资料库 RadioFans.CN