diff --git a/services/adacam-odc/adacam_odc.py b/services/adacam-odc/adacam_odc.py
index 505e446..57f4979 100644
--- a/services/adacam-odc/adacam_odc.py
+++ b/services/adacam-odc/adacam_odc.py
@@ -1241,7 +1241,10 @@ def system_init():
 # =============================================================================
 
 
-def stop_preview_impl():
+def stop_preview_impl():  # DISABLED
+    pass
+
+def _stop_preview_impl_orig():
     """Stop preview mode — restore normal camera config and restart camera-bridge."""
     preview_state["active"] = False
     preview_state["started_at"] = None
@@ -1261,7 +1264,10 @@ def stop_preview_impl():
     logger.info("[preview] stopped, camera-bridge restored")
 
 
-def start_preview_impl():
+def start_preview_impl():  # DISABLED
+    pass
+
+def _start_preview_impl_orig():
     """Start preview mode — switch camera to preview config, restart camera-bridge.
     Auto-stops after PREVIEW_TIMEOUT_SEC seconds."""
     # Cancel any existing timer