PB520R Video RAM Upgrade

Caution Only authorized service personnel should upgrade the system. Anyone who wants to upgrade the system themselves should know about the dangers of electrostatic discharge (ESD) and the necessary precautions. Unknowingly damaging the components of the computer will void the warranty.
 
Specifications
The PB520R can be upgraded to 2MB video memory using two 256Kx16-70ns SOJ DRAM chips. The following brands and part numbers are recommended.

Manufacturer Part Numbers
Fujitsu MB814260-70J-ER
Hitachi HM514260AJ-7T
Micron Technology MT4C16257DJ-7TR
Mitsubishi M5M44260-AJ-7-T10
NEC UPD42S42560LE-70ITR or UPD42460LE-70ITR
Samsung KM416C256AJ-7T or KM416C256BJ-7T
Toshiba TC514260BJ-7(EL)

Location
The video memory upgrade is inserted in sockets U10A1 and U11A1. Pin 1 is at the front right corner of the socket. To install the chip, insert it into the socket and push it on the chip until it snaps into place.

Purchase Referrals
To purchase video RAM for this system, contact the following supplier(s)

Coastline Computer Products
Specifications Part # Equivalent PB Part #
2 - 256KB x 16, 70ns SOJ DRAM TC514260BJ-70 080378