diff --git a/content/projects/repair-denon-avr-4520/index.md b/content/projects/repair-denon-avr-4520/index.md
index 66fe5a6..921b162 100644
--- a/content/projects/repair-denon-avr-4520/index.md
+++ b/content/projects/repair-denon-avr-4520/index.md
@@ -193,4 +193,6 @@ one any time soon_.
 _For those interested, I'm currently using the `SBR/SBL` channels to bi-amp my speakers. No, I 
 don't hear any difference, but I've got 6 unused channels in my setup, so why not use them?_
 
+_Update: for those looking for the service manual, you can find it at [HifiEngine]._
+
 [hifiengine]: https://www.hifiengine.com/manual_library/denon/avr-4520.shtml
\ No newline at end of file
diff --git a/static/docs/service_manuals/hfe_denon_avr-4520_452-ci_service_en.pdf b/static/docs/service_manuals/hfe_denon_avr-4520_452-ci_service_en.pdf
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