Brother BE-901 Parts list manual

1
Technical Reference
Title: Replacing Main Board
Date: February 25, 2009
Models: BE-901, BE-901-PC, BE-1201, BE-1201-PC, BES-916, BES-1216
1. Make sure machine is OFF and Unplugged.
2. Remove cover assy. (Six screws removed “A”, Three loosened “B”)
3. Identifying Main Bord. (Also: Power Supply, and Head Board)
A
A
AAA
A
B
Power Supply
Main Board
Head Board Main Board
Head Board
Power Supply

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4. Unplugging all wire connector harnesses. Note following connecters are not used or
have jumper: P5 & P25—have a jumper, P1, P3, P4, P6, P8, P10, P11 and P13—Not used:
marked with asterisk *.
5. Unplug all connectores to remove board. However, keep in mind that connectors only
go in one spot and can not be confused.
6. Board is held inplace by plastic clip locks. In order to unlock you will need to squeese
locks and lightly pull-up on board to release.
*
*
*
*
*
*
*
*
*
*

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(Fig. 1-1)
Six connectors
total hold board
down.
Clip Locations

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P-Rom Replacement:
1) Locate the P-ROM that is mounted on the
board. You will need to remove the old P-
ROM chip carefully (see below).
2) Re-insert the new P-ROM chip very
carefully. You must ensure that all the legs
are entering the proper hole and that no legs
are bent or broken off. Use extreme
caution when performing this task.
7. Once you remove the old board you are ready to install the new one. Things to look for
before installing.
A. Jumpers on plugs P-25 and P-5.
1. If the new board does not have them please use the ones from old board;
this will be OK.
B. P-ROM =
1. If the new board does not have P-ROM please use the one from old board;
it will be OK.
BES 960
MT-C

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8. Installing board, please follow reverse instructions on removal.
9. After board is installed and all plugged in you will need to perform a version up-grade in
accordance with the model of machine. The machine will act like it is in-operative until
this step is performed.For version up-grading machine please follow version up-grade
procedure.
Be sure to align the U-shape cut out
to the socket mount.