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1、VOLUME R-17, MOST-OFTEN-NEEDED 1957 RADIO SERVICING INFORMATION _ Westinghouse Chassis V-2278-2, used in Models H-610P5, H-611P5, H-612P5 (See the next page at right zrS/ | for additional service data) pufeuris i?la F fir & * j 10! (- H H o U * W6AT1W COICT ACT Battery Installation IF ALIGNMENT REQU
2、IREMENTS 1. Form a 4 or 5 turn loop of wire and connect across the signal generator output cable. 2. Signal generator capable of covering frequencies of 455 KC and the entire broadcast band with provisions for modulation. 3- VTVM or output meter. 4. Keep the output of the signal generator low enough
3、 just to give an indication on the VTVM or output meter. If the peak is broad or double peak occurs when rocking the IF slug adjustment, the signal generator output is excessive. Either further decoupling of the generator loop or decreas ing the generator output is necessary. 5. Set the volume contr
4、ol and tuning capacitor to maximum. Loop L 201 Generator Frequency Connect VTVM or output meter across the voice coil and adjust 455 KC T20?, T202 and T201 in or der indicated for max. output j Reduce generator output if necessary for T202 and T201 adjustments.* *ft is recommended that a fiber align
5、ing tool that snugly fit* the slot in the ferrite core be used to prevent chipping of the *ft. RF ALIGNMENT REQUIREMENTS 1. Steps 1, 2 and 3 also apply as in the IF alignment. 2. Keep the output of the signal generator low enough just to give an indication on the VTVM or output meter. 3. Set the vol
6、ume control to maximum. generator to: Loop L 201 Generator Frequency C201 Setting 1625 KC Min. and adjust for max. output Oscillator Trim. *D* Antenna Trim. *B Caution. Be sure during RF Alignment that the hand or any object* on fh bench do not come in close contact with the antenna loop or detuning wilt occur and alignment will he incorrect. 168 收音机爱 好者资料库 RadioFans.CN
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