11. HARDWARE LABELS.
Each PCB has a label with the hardware code. GymnaUniphy nv. puts the label on the PCB during
production.
The main PCB consists of an eeprom in which the actual hardware code of the used PCB is saved.
The hardware code consists of 4 characters and is composed as follows (from left to right):
0…
From 1 to 9. Increase in case of a
principle technology change.
Hardware is not compatible
anymore.
All previous changes made in
hardware shall be inherited in
the new layout. The last 3
alphanumerical numbers will
begin with A
.A..
A to Z Increase in case of a
principle technology change.
Components are not anymore
compatible with the previous
layout. All previous changes
made in hardware shall be
inherited in the new layout. The
last 2 alphanumerical numbers
will begin with A
..A.
A to Z Increase in case of
component change.
…A
A to Z Increase in case of a PCB
track change.
Example:
Suppose that resistor R68 changes from 22 K to 100 K.
The actual hardware version 1AAA will be upgraded to 1ABA.
11.1 Upgrading the hardware code.
Every hard-or software change will be presented in a technical bulletin. In case of a hardware change
GymnaUniphy nv. will provide the necessary components as well as a new hardware label. This label
must be put on the upgraded PCB.
The hardware code also has to modified in the serial eeprom. See chapter 6.6 for more details.
/ The user can easily see the hardware code of each PCB in the system settings menu (see chapter
5.8).
Phyaction Guidance E/C – service manual version 0.5 Page 42
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