Machinery: Always use update_use_power()

code/modules/paperwork/faxmachine.dm

@@ -12,7 +12,7 @@ var/list/adminfaxes = list()	//cache for faxes that have been sent to admins
 	insert_anim = "faxsend"
 	req_one_access = list(access_lawyer, access_heads, access_armory, access_qm)
 
-	use_power = 1
+	use_power = USE_POWER_IDLE
 	idle_power_usage = 30
 	active_power_usage = 200
 	circuit = /obj/item/weapon/circuitboard/fax

code/modules/paperwork/papershredder.dm

@@ -9,7 +9,7 @@
 	var/shred_anim = "shredder-shredding"
 	density = 1
 	anchored = 1
-	use_power = 1
+	use_power = USE_POWER_IDLE
 	idle_power_usage = 10
 	active_power_usage = 200
 	power_channel = EQUIP

code/modules/paperwork/photocopier.dm

@@ -6,7 +6,7 @@
 	var/insert_anim = "bigscanner1"
 	anchored = 1
 	density = 1
-	use_power = 1
+	use_power = USE_POWER_IDLE
 	idle_power_usage = 30
 	active_power_usage = 200
 	power_channel = EQUIP