PART III ELECTRICAL SYSTEM OF THE UNIT
3-5
ENGLISH
Display circuit board
The display circuit board is located inside the plastic control panel cover. The circuit board is connected to the main
circuit board by display circuit board wire. If the display circuit board wire connections are loosened, or circuit boards
are broken there will no display lights or incorrect display indicator lights on the display panel (Fig. 3.2-3).
Fig. 3.2-3 The plastic top cover and display circuit board.
25-Remote control receiver
26-Display circuit board
27-Display circuit board wire
28-Odor sensor
29-Plastic control panel cover
30-Plastic top cover
For further information on PCB
Circuit boards were created in the mid-1930s. Commonly known as PCBs (printed circuit boards), circuit boards consist of an insulator
(usually fiberglass), with threads of conductive material serving as wires on the base of the board. The insulator may consist of one or
numerous layers of material glued into a single entity. These additional layers may serve a number of purposes, including providing
grounding to the board. The threads on the surface of a circuit board are usually copper, created either by laying down individual lines
mechanically, or by coating the entire board in copper and stripping away excess. Since the 1980s most circuit boards use surface-
mounted components. These components are designed with small tabs, and are made to be easily soldered in place on the board
with very little hassle. In modern circuit board production, this process is usually performed by placing the cool solder mixture, and
baking the entire board to melt the components in place. Prior to the creation of surface-mount technology in the mid-1960s, all circuit
boards used wire to attach components to the board. With the need for wire eliminated, circuit boards have become lighter and more
efficient to produce.
Odor sensor
Odor sensor
Display circuit board wire
Remote receiver
Remote receiver
Display circuit board
Display circuit board
Negative ion
brush terminal
Negative ion
generator
Fan motor
capacitor
25
26
28
29
30
27
Summary of Contents for R200T
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