IBM V03 Maintenance Information page 204

Coax
IPDS
Module
Twinax
IPDS
Module
Proper operation of the feature requires the attachment card to be
replaced with an identical card (SCS or IPDS).
1. Turn off the printer and unplug the power cord from the
printer.
2. Remove the attachment card. See Attachment cards: serial,
twinax, LAN, coax.
3. On the bottom side you will find the part number of the
attachment card.
Shown here is the location of the module socket used to enable
the IPDS feature.
v If there is no module in this socket, the card is an SCS card.
v If there is a module in the socket, the card is an IPDS card.
The module must not be removed or transferred to another
attachment card. The IPDS module is not available as a spare
part. Replace the attachment card when required.
Chapter 5. Removals, service checks and adjustments
204