HP 220 - Manual (Page 75)

8 Remove the original EPROMs or masked
ROMs from their sockets, and install them
on the new PCA.
The original PCA contains DithDr four
EPROMs or two masked ROMs. The
EPROMs eachhave one pair of pins less
than the masked ROMs; if you are
installing EPROMs, leave the rightmost
pair of holes empty in each socket.
9 If a SIMM is installed on the original PCA, remove it and install it on the new PCA.
EPROMs
Masked ROMs
Empty Empty
C2tibr2tions: After having installed a new main PCA, perform the following calibrations in
the given order (Details D chapter 7):
1. Bail calibration
2. MediaĆsensor calibration
3. Cartridge alignment
4. Accuracy calibration
5. SetupĆsheet calibration
Empty pair of holes
U28
U9
U29
U4
U28
U9
U29
U4
(Part numbers D chapter 10.)
6Ć11 Removal and Replacement C3187Ć90000
If you are installing a new PCA, perform the following extra steps: