Bin (.BN) command numbers for the LJ4 are as follows:

For the main (standard) cassette tray:

Cassette Ltr 	- 1
Cassette Lgl	- 4
Cassette A4	- 7
Cassette Exec	- 10
Cassette Com-10 - 13
Cassette Monarch- 16
Cassette DL	- 19
Cassette C5     - 22

MP = The upper "manual feed" tray or what HP calls the "Multi-Purpose" Tray:
MP Ltr		- 2
MP Lgl		- 5
MP A4		- 8
MP Exec		- 11
MP Com-10	- 14
MP Monarch	- 17
MP DL		- 20
MP C5		- 23

Lower = optional HP tray that fits on the bottom of the printer
Lower Ltr	- 3
Lower Lgl	- 6
Lower A4	- 9
Lower Exec	- 12
Com-10		- 15  (This is for the optional envelope feeder, I believe)
Monarch		- 18    "    "  "   "     "        "        "    "    "
DL		- 21    "    "  "   "     "        "        "    "    "
C5		- 24    "    "  "   "     "        "        "    "    "

uploaded by Michael Thaler 73505,1305