You can use the IIcx one in the IIci yes. Same pinout. Just slightly different ratings on the 12V and -12V lines but not substantial enough to affect testing with it.
These power supplies tend to have a problem with the 5V trickle supply that is used as part of the soft power on these machines.
IIci logicboards also tend to have issues with the startup/shutdown circuit affected by leaking caps.
You can use the IIcx one in the IIci yes. Same pinout. Just slightly different ratings on the 12V and -12V lines but not substantial enough to affect testing with it.
These power supplies tend to have a problem with the 5V trickle supply that is used as part of the soft power on these machines.
IIci logicboards also tend to have issues with the startup/shutdown circuit affected by leaking caps.