diff --git a/app/logic/document_outputs.py b/app/logic/document_outputs.py
index 7fe1623..17d0576 100644
--- a/app/logic/document_outputs.py
+++ b/app/logic/document_outputs.py
@@ -1264,22 +1264,20 @@ def _render_replica_pdf_from_layout(
 
 
 def save_replica_pdf(db: Session, document: Document, output_path: Path, mode: str) -> None:
-    if mode not in {"clean", "scan_backed", "debug_overlay"}:
+    if mode not in {"clean", "debug_overlay"}:
         raise ValueError(f"Unsupported replica mode: {mode}")
 
     current_file, _, _, _, _ = _get_replica_source_context(document)
     out_path = Path(output_path)
     out_path = out_path.with_name(re.sub(r"_v\d+(?=\.[^.]+$)", "", out_path.name))
 
-    stem = re.sub(r"(_replica_clean|_replica_scan_backed)$", "", out_path.stem)
+    stem = re.sub(r"(_replica|_replica_clean|_replica_scan_backed|_replica_debug_overlay|_debug)$", "", out_path.stem)
     suffix = out_path.suffix or ".pdf"
 
     if mode == "clean":
-        out_path = out_path.with_name(f"{stem}_replica_clean{suffix}")
-    elif mode == "scan_backed":
-        out_path = out_path.with_name(f"{stem}_replica_scan_backed{suffix}")
+        out_path = out_path.with_name(f"{stem}_replica{suffix}")
     else:
-        out_path = out_path.with_name(f"{stem}_replica_debug_overlay{suffix}")
+        out_path = out_path.with_name(f"{stem}_debug{suffix}")
 
     out_path.parent.mkdir(parents=True, exist_ok=True)
 
@@ -1294,16 +1292,6 @@ def save_replica_pdf(db: Session, document: Document, output_path: Path, mode: s
 
     if mode == "clean" and not page_lines:
         raise ValueError("clean_replica_has_no_renderable_lines")
-    if mode == "clean":
-        has_text = False
-        for page in layout_json.get("pages", []):
-            if page.get("lines"):
-                has_text = True
-                break
-        if not has_text:
-            actual_mode = "scan_backed"
-            out_path = out_path.with_name(f"{stem}_replica_scan_backed{suffix}")
-            layout_json = build_replica_layout(document, mode="scan_backed")
 
     layout_version = _save_replica_layout_version(db, document, layout_json, mode=actual_mode)
 
diff --git a/app/routes/documents.py b/app/routes/documents.py
index 58de2cf..2a71892 100644
--- a/app/routes/documents.py
+++ b/app/routes/documents.py
@@ -2281,7 +2281,7 @@ def document_detail(document_id: str, request: Request, queue: str | None = None
     line_numbers = list(range(1, max(actual_line_count, expected_line_count) + 1))
 
     replica_clean_output = _get_latest_replica_output(document, "clean")
-    replica_scan_backed_output = _get_latest_replica_output(document, "scan_backed")
+    replica_scan_backed_output = None  # scan-backed replica disabled; scan uses document.current_path
     replica_debug_overlay_output = _get_latest_replica_output(document, "debug_overlay")
 
     overlay_page_data = []
@@ -2371,8 +2371,6 @@ def document_detail(document_id: str, request: Request, queue: str | None = None
         preview_path = scan_path
     elif effective_viewer_source == "replica" and replica_path:
         preview_path = replica_path
-    elif effective_viewer_source == "replica_scan_backed" and replica_scan_backed_path:
-        preview_path = replica_scan_backed_path
     elif effective_viewer_source == "replica_debug_overlay" and replica_debug_overlay_path:
         preview_path = replica_debug_overlay_path
     else:
diff --git a/app/templates/documents/detail.html b/app/templates/documents/detail.html
index e665773..8a770f4 100644
--- a/app/templates/documents/detail.html
+++ b/app/templates/documents/detail.html
@@ -244,11 +244,6 @@ document.addEventListener("DOMContentLoaded", () => {
         <input type="hidden" name="return_viewer_source" value="replica">
         <button type="submit">Save Replica PDF</button>
     </form>
-    <form method="post" action="/documents/{{ document.document_id }}/save-replica-pdf-scan-backed" style="display:inline;">
-        <input type="hidden" name="return_tab" value="ocr-review">
-        <input type="hidden" name="return_viewer_source" value="replica_scan_backed">
-        <button type="submit">Save Replica PDF (Scan-backed)</button>
-    </form>
     <form method="post" action="/documents/{{ document.document_id }}/save-replica-pdf-debug-overlay" style="display:inline;">
         <input type="hidden" name="return_tab" value="ocr-review">
         <input type="hidden" name="return_viewer_source" value="replica_debug_overlay">
@@ -337,9 +332,6 @@ document.addEventListener("DOMContentLoaded", () => {
                     {% if replica_clean_output %}
                     <a class="preview-source-link{% if viewer_source == 'replica' %} active{% endif %}" href="/documents/{{ document.document_id }}?tab={{ active_tab }}&viewer_source=replica">Replica</a>
                     {% endif %}
-                    {% if replica_scan_backed_output %}
-                    <a class="preview-source-link{% if viewer_source == 'replica_scan_backed' %} active{% endif %}" href="/documents/{{ document.document_id }}?tab={{ active_tab }}&viewer_source=replica_scan_backed">Replica (Scan-backed)</a>
-                    {% endif %}
                     {% if replica_debug_overlay_output %}
                     <a class="preview-source-link{% if viewer_source == 'replica_debug_overlay' %} active{% endif %}" href="/documents/{{ document.document_id }}?tab={{ active_tab }}&viewer_source=replica_debug_overlay">Replica (Debug)</a>
                     <a class="preview-source-link{% if viewer_source == 'docx' %} active{% endif %}" href="/documents/{{ document.document_id }}?tab={{ active_tab }}&viewer_source=docx">DOCX</a>