diff --git a/maintenance.xml b/maintenance.xml
index bb15001..e9b19a4 100644
--- a/maintenance.xml
+++ b/maintenance.xml
@@ -257,6 +257,18 @@
             <field name="keyword">form_print</field>
             <field name="model">optical_equipment.maintenance,-1</field>
             <field name="action" ref="report_calibration"/>
+    	</record>
+    	<record model="ir.action.report" id="report_capacitation">
+            <field name="name">Capacitation</field>
+            <field name="model">optical_equipment_maintenance.service</field>
+            <field name="report_name">optical_equipment_maintenance.service</field>
+            <field name="report">report/certificado_capacitacion.odt</field>
+            <field name="single" eval="True"/>
+        </record>
+	<record model="ir.action.keyword" id="report_capacitation_keyword">
+            <field name="keyword">form_print</field>
+            <field name="model">optical_equipment_maintenance.service,-1</field>
+            <field name="action" ref="report_capacitation"/>
         </record>
 	<menuitem parent="menu_diary"
 		  action="act_maintenance_diary_calendar"
diff --git a/product.py b/product.py
index da00bf5..9bbfe48 100644
--- a/product.py
+++ b/product.py
@@ -253,13 +253,12 @@ class Template(metaclass=PoolMeta):
     def default_voltageDC():
         return 0
 
-    @staticmethod
-    def default_voltageDC_uom():
+    @fields.depends('voltageDC', 'voltageDC_uom')
+    def on_change_voltageDC_uom(self):
         pool = Pool()
         Measurements = pool.get('product.uom')
         measurement = Measurements.search(['name', '=', 'Volt'])[0].id
-        
-        return measurement
+        self.voltageDC_uom = measurement
 
 
     @staticmethod
diff --git a/purchase.xml b/purchase.xml
index ee11283..2a0c5c6 100644
--- a/purchase.xml
+++ b/purchase.xml
@@ -22,7 +22,7 @@ this repository contains the full copyright notices and license terms. -->
             <field name="name">Purchase</field>
             <field name="model">purchase.purchase</field>
             <field name="report_name">purchase.purchase</field>
-            <field name="report">report/Compras.odt</field>
+            <field name="report">report/compras.fodt</field>
             <field name="single" eval="True"/>
         </record>
 	<record model="ir.action.keyword" id="report_purchase_keyword">
diff --git a/sale.py b/sale.py
index c1b125a..c611ccb 100644
--- a/sale.py
+++ b/sale.py
@@ -23,11 +23,15 @@ class Sale(metaclass=PoolMeta):
                                   ('equipments', 'Equipments'),
                                   ('replaces', 'Replaces')], "Sale Type", required=True,
                                  states={'readonly': Eval('state') != 'draft'})
-    maintenance_type = fields.Selection([('preventive', 'Preventive'),
+    maintenance_type = fields.Selection([('', ""),
+                                         ('preventive', 'Preventive'),
                                          ('corrective', 'Corrective')
-                                         ], "Maintenance Type", states={'invisible': Eval('sale_type') != "maintenance",
-                                                                        'required': Eval('sale_type') == "maintenance",
-                                                                        'readonly': Eval('state') != 'draft'})
+                                         ], "Maintenance Type",
+                                         states={
+                                             'invisible': Eval('sale_type') != "maintenance",
+                                             'required': Eval('sale_type') == "maintenance",
+                                             'readonly': Eval('state') != 'draft'},
+                                         depends=['sale_type'])
 
     contract_ref = fields.Reference("Contract Base", selection='get_origin_contract',
                                     domain=[('party', '=', Eval('party')),
diff --git a/sale.xml b/sale.xml
index ba60869..d3a2eec 100644
--- a/sale.xml
+++ b/sale.xml
@@ -6,37 +6,16 @@
 	<field name="inherit" ref="sale.sale_view_form"/>
 	<field name="name">sale_form</field>
     </record>
-    <!--
-    <record model="ir.ui.view" id="sale_line_view_form">
-	<field name="model">sale.line</field>
-	<field name="inherit" ref="sale.sale_line_view_form"/>
-	<field name="name">sale_line_form</field>
-    </record>
-    <record model="ir.ui.view" id="sale_line_view_tree">
-	<field name="model">sale.line</field>
-	<field name="inherit" ref="sale.sale_line_view_tree"/>
-	<field name="name">sale_line_tree</field>
-    </record>
-    <record model="ir.ui.view" id="sale_line_view_tree_sequence">
-        <field name="model">sale.line</field>
-	<field name="inherit" ref="sale.sale_line_view_tree_sequence"/>
-	<field name="name">sale_line_tree_sequence</field>
-    </record>
-    -->
-    <!--
-    <record model="ir.ui.view" id="create_subscription_view_form">
-	<field name="model">sale.create.subscription.start</field>
-	<field name="type">form</field>
-	<field name="name">create_subscription_form</field>
-    </record>
-    <record model="ir.action.wizard" id="create_subscription">
-	<field name="name">Subscription</field>
-        <field name="wiz_name">sale.create.subscription</field>
+    <record model="ir.action.report" id="report_sale">
+        <field name="name">Sale Equipments</field>
         <field name="model">sale.sale</field>
+        <field name="report_name">sale.sale</field>
+	<field name="report">report/venta.fodt</field>
+        <field name="single" eval="True"/>
     </record>
-    <record model="ir.action.keyword" id="create_subscription_keyword">
-	<field name="keyword">form_action</field>
+    <record model="ir.action.keyword" id="report_sale_keyword">
+        <field name="keyword">form_print</field>
         <field name="model">sale.sale,-1</field>
-        <field name="action" ref="create_subscription"/>
-	</record>-->
+        <field name="action" ref="report_sale"/>
+    </record>
 </tryton>