Westinghouse-Electric-Corp-H-548T5 电路原理图.pdf

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1、VOLUME R-16, MOST-OFTEN-NEEPEP 1956 RADIO SERVICING INFORMATION Westinghouse CHASSIS ASSEMBLY V-2261-1 vu; T1MT 4 IFf( -Ml C I 90 15W4 ii*s sets zaa K L CLOC* 4EC*A*5* ALL VOLTAGES MEASUREO fROM COMMON NEGATIVE USING A V T V M ANO NO SIGNAL INPUT LINE VOLTAGE SET AT |?V AC READINGS SHOULD BE AS SHOW

2、N *20 PER CENT MODELS H-547T5 (Gray) H-548T5 (Ivory) H-549T5 (Green) H-550T5 (Rose) ALIGNMENT flt is recommended that the chossis be isoOated from the power line by means of an isolation transformer. While making the following adjustment, keep the voOume control! set for maximum output and the signa

3、l! generator Step Connect Signal Generator To: Signal Gene rotor Frequency Tun ing Copacitor VTVM Across Voice Coil and Adjust for Maximum Output i Stator of tuning capacitor (A) through a200 mmfd. cap acitor. 455KC 400 Cycle 30% mod. Minimum capacity Top and bottom slugs of T2 ond Tl in order given

4、* 2. Radiated signal 1625 KC Minimum capacity OsciOOator trimmer (D) 3. Radiated signal 1400 KC 1400KC Antenna trimmer (B) Ot is recommended thot o fiber aOigning tooB thot snugly fits the sBot in the powdered iron core be used to prevent chipping of the sBot. M 00 MTV M CHASSIS REMOVAL 1. Remove th

5、e 3/4 inch self-tapping screw located at the bottom rear of the radio back cover. 2. Remove die two 4 1/4 inch phi 11 ip head bolts securing die back cover to the front rim and face assembly. 3. The chassis can now be removed for servicing. Note; To remove die front rim and face assembly, remove the

6、 (4) 1/4” self-tapping screws, two from the top bracket assembly and two frpm the radio chassis. I2BE6 oowvtrrCT t2Mt6 OCIMM AUMO When extracting stubborn or troublesome components, the printed wiring may crack or break-off. Repairs can be made by soldering a small piece of tinned copper wire over the damaged or broken conductor (pig tail trimmings from capacitors and resistor, are ideal for this purpose). 171 收音机爱 好者资料库 RadioFans.CN