Gary,
I've got an original hard copy of the service manual for the 32-2B, but I haven't seen a PDF of owner or service manual anywhere on-line.
The REC BIAS and REC EQ buttons work together to accommodate different tapes. Here are the settings for some common tapes:
REC BIAS = 1 / REC EQ = 1 (This setting is what the Tascam 32 is set for)
Ampex/Quantegy 456/457
3M/Scotch 250, 226/227, 966/986
BASF/EMTEC/RMGI SM911, SM468, LPR35
Maxell XL/XLI, UD
TDK L-Series Audua
REC BIAS = 1 / REC EQ = 2
Ampex/Quantegy 406/407
3M/Scotch 206/207
REC BIAS = 2 / REC EQ = 1
3M/Scotch 211, 212, 228, 229 (Highlander)
Ampex/Quantegy 600 Series
BASF LP 35 LH
Hope that helps. Any other questions, feel free to ask.
~Tim