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A number of MSX machines started to use the so called "MSX engine" chip, which condensed a number of discrete ICs into one SMD chip, most often a TQFP one. The first MSX Engine was the Toshiba T7775 chip, which was used in the Sanyo MPC-1, as early as 1985.
One of the Macs has to be a strong contender; per a 1989 edition of InfoWorld "All the Macs are extremely well-built. There is extensive use of surface-mount technology ..." so at that point it's considered to be worthy of mention. Of the Macs under review there, 1989's SE/30 shows surface-mount components alongside through-hole and socketed, suggesting it is from early in the design transition.