The following pages illustrate and list, by part number and description, all replacement parts for the Bell and Howell / Eiki Overhead projector models 3850A, 3860A, 3870A and 3890A. Although these overhead projectors are mechanically similar in design, noticeable physical differences will be found in syle of the projection head (die-cast or triplet) and in the lamp arrangement (fixed or change-over).

All listed replacement parts have been indexed on the exploded view illustrations in a suggested order of disassembly to assist service personnel in removal and reassembly procedures. Parts or assemblies not-procurable for replacement however, have been assigned the lettered (NPN) part number.

When ordering replacement parts, always check the parts listing "Usable on Code" column to be certain that the parts to be ordered apply to the projector model being repaired. Whenever the "Usable on Code" column is blank, the listed part applies to all of the overhead projectors models covered in this manual. Where parts are applicable to specific models only; the following code letter system is used to denote the appropriate models involved.