Rom; Dram - Brother HL-720 - B/W Laser Printer Service Manual

1.3.3

ROM

<HL-730/730Plus ONLY>
A program of 512 Kbytes and the font data are stored in the ROM. A 42-pin IC
socket is provided: an 8 Mbits ROM (42-pin) can be mounted to this socket
normally, but a 4 Mbits ROM (40-pin) must be mounted to leave the 1st and 42nd
pins of the socket opened.
1.3.4

DRAM

<HL-720>
A 4M-bit DRAM (x8 bits) is used as the RAM.
Fig. 2.9
Fig. 2.10
II-13