HP Laserjet ..again....

From: Jim Isbell <millenniumfalcon_at_cableone.net>
Date: Sat Sep 18 16:17:38 2004

As I stated earlier, I have cannibalized three HP laserjet series II
printers. In looking over the parts recovered I find that I have three
(3) totally different memory boards.

The first is populated with small chips on BOTH sides of the board with
a total of 128 soldered in chips that appear from their part numbers to
be 256K memory chips, That is the number 256 appears within the part
number. Now I don't know how wide the buss is but I am assuming 8 bits
because of its age. If so this board is a 4 Megabyte memory board.

The second is only half populated with 16 soldered in chips on one side
that have the number 1000 in their part number so I am assuming they are
1meg chips and using the afore mentioned logic I come up with a
2Megabyte memory board.

The third is fully populated with 32 socketed chips with the number 1000
in their part number and that works out to a 4 Megabyte memory board.

Is my logic sound?

Do I have two 4 meg boards and a 2 meg board?

What is the largest memory board the Series 2 could hold?

I am assuming that the socketed memory is best because it is easily
repaired, but are there any problems with the socketed memory having bad
contacts after time?
Received on Sat Sep 18 2004 - 16:17:38 BST

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