HP 200 Service Manual page 75

If you are installing a new PCA, perform the following extra steps:
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 each have 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.
C2tibr2tions: After having installed a new main PCA, perform the following calibrations in
the given order (Details D chapter 7):
1. Bail calibration
2. Media sensor calibration
3. Cartridge alignment
4. Accuracy calibration
5. Setup sheet calibration
C3187 90000
EPROMs
U28
U9
Empty pair of holes
Masked ROMs
U28
U9
Empty Empty
(Part numbers D chapter 10.)
Removal and Replacement
U29
U4
U29
U4
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