Westinghouse-Electric-Corp-H-448T4 电路原理图.pdf

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1、 MANUAL OF 19SS MOST-OFTEN-NEEDED RADIO DIAGRAMS Westinffhouse CHASSIS V-2184-4 TELEVISION O RADIO MODELS H-447T4, H-448T4 AND H-449T4 I2AU6 CONVERTERgj. I2AV6 50C5 T 3 OUTPUT TRANS. I. ALL RESISTANCE VALUES IN OHMS 8 ALL CAPACITANCE VALUES IN NF UNLESS OTHERWISE SPECIF. 2- all VOLTAGES MEASURED FRO

2、M COMMON NEGATIVE USING 20.00C OHM/VCLT METER LINE VOLTAGE SET AT 117 V.A.C. REAOMGS SHOULD BE AS SHOWN 20%. REMOVING COVER With the right hand, in sert a screwdriver into the slot marked A” (see Fig 2). With the left hand, grasp the chassis so that the thumb is on the speaker magnet and the second

3、finger is pressing forward slightly on the tab (see Fig. 2). Then with a slight turn of the screwdriver the bottom cover will unlock from the chassis. ALIGNMENT EXT. ANT. CONNECTION FIG 2 Chassis Layout While making the following adjustments, keep the volume control set for maximum output the signal

4、 generator output attenuated to avoid AVC action._ and Step Conned Signal Generator to Signal Generator Freauency Radio Dial Adjust tor Maximum Output 1 Stator of ant. tuning capacitor (A) through a 200 mmf capacitor 455 kc. Minimum capacity Bottom and top slugs of T1 * 2 Same as step 1 1625 kc. Minimum capacity Oscillator trimmer (D) 3 Radiated signal 1400 kc. 1400 kc. Antenna trimmer (B) * It is recommended that a fiber aligning tool that snugly fits the slot in the powdered iron core beused to prevent chipping of the slot. Ill 收音机爱 好者资料库 RadioFans.CN