98 Printer maintenance C7085-90921
DIMM configuration
You can add additional Random Access Memory (RAM) to this printer by installing Dual Inline
Memory Modules (DIMMs). The HP Color LaserJet 4500 printer uses 100-pin, non-parity,
synchronous DRAM memory modules. The HP Color LaserJet 4550 printer uses 168-pin
synchronous DRAM memory modules. The SDRAM modules do not need to be configured in pairs
(in corresponding left and right slots).
Note Extended Data Output (EDO) DIMMs are not supported.
Adding memory
HP Color LaserJet 4500 printer
You can install 4, 8, 16, 32, or 64 MB DIMMs into the printer’s three DIMM slots. The DIMM slots
can be used to add memory, fonts, or firmware upgrades.
HP Color LaserJet 4550 printer
You can install 64 or 128 MB DIMMs into the printer’s two DIMM slots. The DIMM slots may be
used to add memory only. You can add fonts or firmware upgrades to the printer’s two 100-pin
slots.
Note The HP Color LaserJet 4500 printer will recognize RAM only up to 208 MB. The HP Color LaserJet
4550 printer will recognize RAM only up to 192 MB. Additional memory will not be used by either
printer.
To install memory in the printer, you must remove the formatter board from the rear of the printer.
To remove the formatter board, remove the six screws shown in Figure 4-4. The DIMMs are then
inserted into the available slots in the formatter board. See Appendix A in the online user guide for
installation instructions.
Figure 4-4 Removing the formatter board
CAUTION Do not attempt to remove the DIMM in slot #4 (see Figure 4-5) of the HP Color LaserJet 4500 printer,
or the DIMM in slot #3 (see Figure 4-6) of the HP Color LaserJet 4550 printer. This DIMM is part of
the printer’s firmware. Removing it will affect printer operation.
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