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用LA4100替代TBA820:将TBA820焊下,按表1内的对应关系用引线将焊点与LA4100的引脚相连,将原①脚和⑤脚间的消振电容C_(2554)(1000pF)拆下,改接焊在LA4100的④脚和⑤脚间。与原⑦脚相连的电阻R_(3553)(56Ω)拆下不用,其他元件可不必更动。LA4100集成电路可置于印刷板的铜箔一面,用502胶粘住,将其散热片展平,以免与印刷板相碰造成短路。经此修改后的LA4100的应用电原理如图1所示。
Replace the TBA820 with LA4100: Solder the TBA820 and connect the solder joints with the pins of the LA4100 according to the corresponding relation in Table 1, and remove the C_ (2554) (1000pF) between the original ① pin and the ⑤ pin , Change the welding in the LA4100 ④ feet and ⑤ feet. The resistance R_ (3553) (56Ω) connected to the original ⑦ pin is removed, but the other components do not need to be changed. The LA4100 integrated circuit can be placed on one side of the copper foil of the printed circuit board, glued with 502 glue, flatten its heatsink to avoid short circuiting with the printed circuit board. After the modification of the application of the principle of LA4100 shown in Figure 1.