Unitary chassis for television receivers with two circuit boards and method of manufacture

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings and particularly FIGS.
1 to 4, a television receiver 10 is illustrated consisting of a table top cabinet 11 having a removable rear cover panel 12, a cathode ray tube 14 and a unitary chassis assembly 16 removably mounted on cabinet bottom panel 18.
The chassis assembly 16 initially includes a video drive circuit board 20 that is mounted to the rear of the CRT 14 upon final assembly as will appear more clearly hereinafter.
As seen in FIG.
3, the chassis assembly 16 with some modification to the circuitry therein, is adapted to be common top receiver 10 illustrated in FIGS.
1 and 3, as well as consoles.
Note console cabinet 23 illustrated in FIG.
3.
As seen clearly in FIGS.
2 and 3, the chassis assembly 16 includes a generally rectangular one-piece plastic injection molded frame 24 having slots that slidably receive a signal board 25 in a left slot therein and a power supply board 26 in a right slot therein.
Circuit boards 25 and 26 are held in the chassis frame 24 by a back frame 28 that snap-locks to the rear of the main chassis frame 24 and is secondarily held thereto by a single central screw not shown in FIG.
3.
The signal board 25 as initially manufactured carries the video drive circuit board 20 at its left rear cut-out 29, which is broken away at final assembly and attached to the CRT as illustrated in FIG.
1.
The signal board 25 includes input circuitry, tuner circuitry, circuitry and components for additional features such as MTS stereo, the video circuit board 20 and a jack pack 30.
The signal board 25 is identical in size for all television receiver models with only some of its circuitry and components being modified to accommodate the different models.
The jack pack 30, however, is identical for all models and is mounted in exactly the same location on board 25 regardless of the receiver model.
Furthermore, most of the terminals for the jack pack 30 are soldered to conductors on the circuit board 25 eliminating the need for much of the external wiring commonly associated with jack packs