IBM R31 - Manual (Page 214)

ThinkPad R31 Part III
This section applies to the following models: 2656-2Gx,
2656-2Hx, 2656-2Jx, 2656-2Kx, 2656-2Lx, 2656-1Ax,
2656-2Vx, 2656-1Bx, 2656-2Px, 2656-2Mx, 2656-1Cx,
2656-2Cx, 2656-2Nx, 2656-2Ex, 2656-1Dx, 2656-2Gx,
2656-1Fx, 2656-1Gx, 2656-1Ix, 2656-1Jx, 2656-1Kx,
2656-Lx, 2656-Mx, 2656-1Ox, 2656-1Px, 2656-37x,
2656-3Cx, 2656-3Ax, 2656-38x, 2656-KCU, 2656-KDU,
2656-KEU, 2656-KFU, 2656-GAJ, 2657-GBJ, 2656-3CG,
2656-4CG, 2656-2HC, 2656-1EM, 2656-1EA, 2656-1EB,
2656-1EH, 2656-1HK, 2656-1HT, 2656-L3x, 2656-L4x,
2656-L5x, 2656-L6x, 2656-M1x, 2656-M2x, 2656-M3x,
2656-M4x, 2656-M5x, 2656-M6x, 2656-PYx, 2656-NHx,
2656-NEx, 2656-N5x, 2656-N2x, 2656-NYx, 2656-NXx,
2656-R5x, 2656-R6x, 2656-R2x, 2656-R3x, 2656-T2J,
2656-T4J, 2656-TAP, 2656-TAS, 2656-TAX, 2656-TBP,
2656-TBS, 2656-TBX, 2656-M3G, 2656-MLG,
2656-K1B/K1H/K1C, 2656-MLM, 2656-KBA/KBK,
2656-KGM/KGK/KGT, 2656-KMB/KMH, 2656-KJJ,
2656-KMC, 2656-KAM/KAK/KAT, 2656-TAU, 2656-TBU,
2656-R9G, 2656-T9G.
208 ThinkPad R30/R31 HMM