Brother International IntelliFax-3550 Service Manual - Page 34

MFC4550plus/7650MC, This ROM stores the PCL4 Driver programs for high-quality print.

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1 #12 3 #15 #11 2 4 #10 #2 #3 6 5 Main PCB Circuit Diagram 2/7 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 #10 #11 #12 #15 -- 4M x 8 bits 4M x 8 bits -- FAX8000P/MFC6550MC/ 9000/9500 -- 4M x 8 bits 4M x 8 bits -- MFC7550MC -- -- -- 16M x 16 bits FAX3650/8200P/MFC4450/4550plus/7650MC: -- : Not installed DRAM No. Model FAX3650/8200P #10 #15 -- 16M x 16 bits MFC4450 4M x 16 bits 4M x 16 bits MFC4550plus 4M x 16 bits 4M x 16 bits MFC7650MC -- 16M x 16 bits -- : Not installed III - 15

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III –
15
DRAM No.
#10
#11
#12
#15
Model
FAX3550/MFC4550
––
4M x 8 bits
4M x 8 bits
––
FAX8000P/MFC6550MC/
––
4M x 8 bits
4M x 8 bits
––
9000/9500
MFC7550MC
––
––
––
16M x 16 bits
–– : Not installed
1
2
3
4
5
6
#12
#15
#11
#10
#2
#3
Main PCB Circuit Diagram 2/7
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:
FAX3650/8200P/MFC4450/4550plus/7650MC:
DRAM No.
#10
#15
Model
FAX3650/8200P
––
16M x 16 bits
MFC4450
4M x 16 bits
4M x 16 bits
MFC4550plus
4M x 16 bits
4M x 16 bits
MFC7650MC
––
16M x 16 bits
–– : Not installed