MFC-9840CDW

FAQs & Troubleshooting

FAQs & Troubleshooting

What kind of memory can I use?

This machine has 128 MB of standard memory and one slot for optional memory expansion. You can expand the memory up to 640 MB by installing dual in-line memory modules (SO-DIMMs). When you add the optional memory, it increases the performance for both copier and printer operations.


In general, the SO-DIMM must have the following specifications:

  • Type: 144 pin and 64 bit output
  • CAS Lantency: 2
  • Clock Frequency: 100 MHz or more
  • Capacity: 64, 128, 256 or 512 MB
  • Height: 31.75 mm (1.25 inches)
  • DRAM Type: SDRAM 2 Bank

  • There might be some SO-DIMMs that will not work with the machine.
  • For more information, call Brother Customer Service.

This type of memory SO-DIMM is available from most major memory suppliers.
The chart below lists the part numbers.

Buffalo SO-DIMM

 Capacity            Buffalo part number         
 128 MB  VN133-D128/MF
 VN133-D128/SD
 256 MB  VN133-D256/MB  
 VN133-D256/SD
 512 MB  VN133-D512/SCD 


TechWorks SO-DIMM
 Capacity           Buffalo part number         
 128 MB  12462-0001
 256 MB  12485-0001
 512 MB  12475-0001


For more information, visit the Buffalo Technology site at
http://www.buffalo-technology.com.

If your question was not answered, have you checked other FAQs?

Have you checked the manuals?

If you need further assistance, please contact Brother customer service:

Related Models

DCP-9045CDN, MFC-9840CDW

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