KEPCO KIT 219-0531, BHK-MG Firmware Upgrade - Manual (Page 2)

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228-1641 100507
KEPCO, INC. " 131-38 SANFORD AVENUE " FLUSHING, NY. 11355 U.S.A. " TEL (718) 461-7000 " FAX (718) 767-1102
http://www.kepcopower.com " email: [email protected]
3.2 DISASSEMBLY PROCEDURE
1. Turn power off, disconnect the unit from source power and remove line cord.
2. For full rack models. remove the top cover from the unit by loosening and removing twelve screws (four on
each side and four on top), securing the cover to the chassis.
3. For half rack models, remove the top cover from the unit by loosening and removing eleven screws (four on
each side and three on top), securing the cover to the chassis
3.3 PROM U41 REPLACEMENT PROCEDURE (SEE FIGURE 1)
1. Locate PROM, U41 on Digital board A1 (see Figure 1).
2. Take the wrist strap from kit and use the peel and stick area to connect the wrist strap to the chassis of the
BHK-MG. Place the wrist strap on your arm as indicated by the instructions for the wrist strap.
CAUTION:FAILURE TO USE THE ESD WRIST STRAP MAY DAMAGE THE PROM!
3. Touch the IC tube to the chassis of the BHK-MG. Open one end.
4. Pry out the PROM U41 using an IC extractor. Insert the hook, first into one slot and then the other, and gently
pry out the PROM. Place the PROM in the tube and close the tube.
5. Open the other end of the IC tube and remove the replacement PROM from the tube.
6. Insert the PROM into the socket, ensuring the dot is oriented as shown in Figure 1 for U41.
7. Reclose the IC tube. Remove wrist strap and disconnect it from the BHK-MG chassis.