tray, shallow bowl, platter, tub, board, phonograph record
盤 centers on a flat, broad surface used for holding or supporting things: a tray, platter, shallow bowl, or tub. The board and phonograph record senses extend naturally from that same idea of a flat, circular or rectangular platform.
盤 combines 般 (which likely contributes the sound) with 皿 (dish/plate), suggesting a flat dish or tray. The exact historical development of 般 is uncertain, but the phono-semantic structure is clear.
The bottom 皿 is a dish or plate, and the top 般 looks like a boat or vessel being carried. Imagine a large flat tray or platter being used to serve food from a boat-shaped container.
For バン, picture a large banquet tray filled with food: banquet -> バン, and the tray is the centerpiece of the feast.
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board (in shogi, go, chess, etc.)
base; basis; foundation; footing; infrastructure
opening (in a game of go, chess, etc.)
endgame; final stage
middle stage; middle phase; middle game; midpoint
disk; discus; platter
ground; crust (earth); bed (gravel, river, etc.)
pelvis
keyboard (of a piano, typewriter, etc.)
bedrock
out-of-print record; out-of-print CD
surface of a board (shogi, go, etc.); (state of) the board; development of a game
compass
suction cup; suction pad; sucker
placenta
lavish feast; splendid banquet
huge rock
lathe
Go board
original recording