Brother IntelliFax-3550 Service Manual page 34

#12
1
#11
2
#2
1
FAX3550/3650/8000P/8200P/MFC4450/4550/6550MC/7550MC/9000/9500:
ROM (8-megabit, 512K x 16 bits) which stores programs.
MFC4550plus/7650MC: Flash ROM (8-megabit) which stores programs.
2
ROM (8-megabit, 512K x 16 bits)
FAX3550/3650/8000P/8200P/MFC4450/4550/4550plus:
This ROM is used only on the qualification machines for demonstration.
MFC6550MC/7550MC/7650MC/9000/9500:
This ROM stores the PCL4 (Driver programs for high-quality print).
3
DRAMs
FAX3550/8000P/MFC4550/6550MC/7550MC/9000/9500:
DRAM No.
Model
FAX3550/MFC4550
FAX8000P/MFC6550MC/
9000/9500
MFC7550MC
FAX3650/8200P/MFC4450/4550plus/7650MC:
DRAM No.
Model
FAX3650/8200P
MFC4450
MFC4550plus
MFC7650MC
3
#15
4 #10
#3
Main PCB Circuit Diagram 2/7
#10
–– 4M x 8 bits
–– 4M x 8 bits
––
#10
–– 16M x 16 bits
4M x 16 bits 4M x 16 bits
4M x 16 bits 4M x 16 bits
–– 16M x 16 bits
III – 15
5
#11 #12
4M x 8 bits
4M x 8 bits
–– ––
#15
–– : Not installed
6
#15
––
––
16M x 16 bits
–– : Not installed