This portion is copied from the Z-4000 manual on the MTH site, however I have discovered that not all PS-1 engines can be reset using the Z-4K Reset Feature. These will require the “throttle jockey/whistle/bell button” routine. This is page 6 and 7 from the owner’s manual. Hope it helps.
PROGRAMMING ORIGINAL PROTO-SOUND®
FEATURES
Programming While in RESET:
Most of the programming features are accessed from the RESET Mode. When
you first turn on the transformer, Proto-Sound-equipped engines will be in
RESET. You can return to RESET at any point during operation simply by
turning off power to the track (putting the throttle handles into the fully lowered
OFF position) for ten seconds or more. You will hear the sounds of the engines
on that track decrease and a single ding to indicate that it has powered off.
When in RESET, your engine will not respond to the whistle or bell buttons with a
horn blast or continuous bell ringing. If you don’t want to configure or change
your locomotive using any of the programmable features, simply leave RESET by
raising the throttle and wait 5-10 seconds before running the locomotive. After
you leave RESET, your engine will operate normally in all the directions, forward,
neutral and reverse. Remember though, once power is turned off for more than 10
seconds, the next time power is applied to the track, your engine will be back in
RESET.
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