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5. Using a small screwdriver, carefully remove the four ROMs or flash memory (see
30).
6. Replace with the equivalent ROMs or flash memory in the upgrade kit. Peel the labels
(two locations) off the card.
Designates Front of Chip
Front Direction Marker
Silk-screened on PCB
Figure 30
ROM Removal
7. Re-install the RRCS DTMF PCB, if required.
Note
If there are battery straps on the PCB, make sure that they are placed in the "on"
position for the processor card(s) to avoid losing your data.
8. Re-insert the processor card(s), reconnect the ribbon cables and MOH connection, if
necessary. If an RSIU card is being added, shift the card positions accordingly, add the
RSIU PCB in slot 11 and change the ribbon cable to connect the RCTU PCB(s) to the
RSIU.
Note any changes needed to accommodate the displaced card, if necessary. If this creates
extensive changes, it may be better to upgrade without adding the RSIU, get the system
working, and then adjust the card positions to add the RSIU card.
9. Turn the Strata DK system back on and follow the DKAdmin/DKBackup instruction
screens for completing the upgrade.
Upgrading Strata DK Systems to DK424 Release 4.0
(front)
CAUTION! Be careful not to break the IC socket
or scratch the PCB trace.
Do Not Break
IC Socket
Upgrading Strata DK Systems to DK424 Release 4.0
(back)
Turn Very Gently
IC Socket Mounted on
Processor's PCB
Do Not Scratch PCB
Figure
2514
153
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