diff --git a/Troubleshooting.md b/Troubleshooting.md
index e12cfa8..300d0c5 100644
--- a/Troubleshooting.md
+++ b/Troubleshooting.md
@@ -77,7 +77,7 @@ Press Button...
 ````
 
 Video of the Self Test:      
-(10K resistor in SNES slot to simulate short-circuit, pin descriptions use the Arduino pin names out of the [schematic](https://github.com/sanni/cartreader/blob/master/hardware/six_slot_adapter/six_slot_adapter_schematic.jpg))
+(10K resistor in SNES slot to simulate short-circuit, pin descriptions use the Arduino pin names out of the [schematic](https://github.com/sanni/cartreader/blob/master/hardware/six_slot_adapter/six_slot_adapter_schematic.pdf))
 
 [![IMAGE ALT TEXT HERE](https://img.youtube.com/vi/HGf1U8dAs9U/0.jpg)](https://www.youtube.com/watch?v=HGf1U8dAs9U)