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vulcan_dishlex_milano_dishwasher_repair [2021/10/28 11:23]
sausage created
vulcan_dishlex_milano_dishwasher_repair [2021/10/29 21:59] (current)
sausage Thank you, BrokenYugo
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 ====== Repairing the Vulcan Dishlex Milano Dishwasher ====== ====== Repairing the Vulcan Dishlex Milano Dishwasher ======
  
-{{ :​repairs:​dishwasher:​door-open.jpg?​direct&​300|}}Two weeks before the International Repair Day 2021, our 16 year old dishwasher from 2005 packed it in. It came with the house, and was pretty old back then. We never used it all that much over the years. But recently it has been used more, and I guess the old girl couldn'​t cope.+{{ :​repairs:​dishwasher:​door-open.jpg?​direct&​300|}}Two weeks before the [[https://​openrepair.org/​international-repair-day/​ | International Repair Day 2021]], our 26 year old dishwasher from 1995 packed it in. It came with the house, and was pretty old back then. We never used it all that much over the years. But recently it has been used more, and I guess the old girl couldn'​t cope.
  
 ===== Symptoms ===== ===== Symptoms =====
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 In order to access the control panel and controller PCB, the door assembly needed to be opened. There are 12 screws, of two types. The larger screw at the top of the door and the smaller for the rest. I took careful note and bagged them so they wouldn'​t be lost. In order to access the control panel and controller PCB, the door assembly needed to be opened. There are 12 screws, of two types. The larger screw at the top of the door and the smaller for the rest. I took careful note and bagged them so they wouldn'​t be lost.
  
-{{:​repairs:​dishwasher:​door-open-screw-positions.jpg?​direct&​600|}} {{:​repairs:​dishwasher:​door-open.jpg?​direct&​600|}} {{:​repairs:​dishwasher:​door-screws-to-remove.jpg.jpg?​direct&​600|}} {{:​repairs:​dishwasher:​door-inside-controller-screw-type.jpg?​direct&​600|}}+{{ :​repairs:​dishwasher:​door-open-screw-positions.jpg?​direct&​600 |}}  
 +{{ :​repairs:​dishwasher:​door-open.jpg?​direct&​600 |}}  
 +{{ :​repairs:​dishwasher:​door-screws-to-remove.jpg.jpg?​direct&​600 |}}  
 +{{ :​repairs:​dishwasher:​door-inside-controller-screw-type.jpg?​direct&​600 |}}
  
 Next was to remove the front panel so that the control panel assembly could be lifted away. The front panel has some adhesive to keep it attached to the door, and in retrospect, I don't think it needed to be removed. As long as there was some leverage, the control panel should still have been removable. Next was to remove the front panel so that the control panel assembly could be lifted away. The front panel has some adhesive to keep it attached to the door, and in retrospect, I don't think it needed to be removed. As long as there was some leverage, the control panel should still have been removable.
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 The microswitch is used to tell the controller that the door is fully closed and locked, and washing can safely begin. This was the first component to test. The microswitch is used to tell the controller that the door is fully closed and locked, and washing can safely begin. This was the first component to test.
  
-{{:​repairs:​dishwasher:​door-release-mechanism.jpg?​direct&​600|}} {{:​repairs:​dishwasher:​door-release-microswitch.jpg?​direct&​600|}}+{{ :​repairs:​dishwasher:​door-release-mechanism.jpg?​direct&​600 |}} 
 +{{ :​repairs:​dishwasher:​door-release-microswitch.jpg?​direct&​600 |}}
  
 In continuity mode on my multimeter, I found that when the switch was pressed, it made a nice click as a good microswitch should. But unless you pressed it further, there was no continuity. Needed replacing. In continuity mode on my multimeter, I found that when the switch was pressed, it made a nice click as a good microswitch should. But unless you pressed it further, there was no continuity. Needed replacing.
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 Could this repair be as simple as that? Could this repair be as simple as that?
  
-I dug out a few spare microswitches,​ mostly some cannibalised good brands with a high voltage rating. One was a new switch ​for my pinball machine projects, but I don't know the rating for that one.+I dug out a few spare microswitches,​ mostly some cannibalised good brands with a high voltage rating. One was a new switch ​from my [[https://​alienabductionunit.com/​pinball | pinball machine projects]], but I don't know the rating for that one.
  
 {{ :​repairs:​dishwasher:​microswitches.jpg?​direct |}} {{ :​repairs:​dishwasher:​microswitches.jpg?​direct |}}
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 {{ :​repairs:​dishwasher:​controller-board-in-bag-view-of-connectors.jpg?​direct |}} {{ :​repairs:​dishwasher:​controller-board-in-bag-view-of-connectors.jpg?​direct |}}
  
-{{:​repairs:​dishwasher:​front-cover-off-and-controller-assembly.jpg?​direct&​600|}}+{{ :​repairs:​dishwasher:​front-cover-off-and-controller-assembly.jpg?​direct&​600 |}}
  
 There are nine connector to the wire harness. I would need to remove the harness to free to controller assembly and get it into the workshop. There are nine connector to the wire harness. I would need to remove the harness to free to controller assembly and get it into the workshop.
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 I cut up strips of black electrical tape with numbers written on them in white marker. These were then used as labels to mark the wires so I could find my way back at re-assembly time. I cut up strips of black electrical tape with numbers written on them in white marker. These were then used as labels to mark the wires so I could find my way back at re-assembly time.
  
-{{:​repairs:​dishwasher:​tape-tags.jpg?​direct&​400|}} {{:​repairs:​dishwasher:​tape-tags-in-place.jpg?​direct&​400|}} {{:​repairs:​dishwasher:​tags-on-dispensor.jpg?​direct&​400|}}+{{:​repairs:​dishwasher:​tape-tags.jpg?​direct&​500|}} {{:​repairs:​dishwasher:​tape-tags-in-place.jpg?​direct&​370|}} {{:​repairs:​dishwasher:​tags-on-dispensor.jpg?​direct&​400|}}
  
 I also needed to remove the tie that binds the wires. I took note of the tie position so I could replace it and re-bind the wires later. I also needed to remove the tie that binds the wires. I took note of the tie position so I could replace it and re-bind the wires later.
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 I removed the front cover of the control panel releasing the binding clips which revealed the control panel PCB. I removed the front cover of the control panel releasing the binding clips which revealed the control panel PCB.
  
-{{:​repairs:​dishwasher:​button-panel-cover.jpg?​direct&​600|}} {{:​repairs:​dishwasher:​button-panel-pcb.jpg?​direct&​600|}}+{{ :​repairs:​dishwasher:​button-panel-cover.jpg?​direct&​600 |}} 
 +{{ :​repairs:​dishwasher:​button-panel-pcb.jpg?​direct&​600 |}}
  
 I managed the test the continuity of the button switches and they were fine. One was a little mushy but worked fine, and I didn't have spares so I left it alone. All LEDs were fine. I managed the test the continuity of the button switches and they were fine. One was a little mushy but worked fine, and I didn't have spares so I left it alone. All LEDs were fine.
Line 122: Line 127:
  
 {{ :​repairs:​dishwasher:​milano-dishwasher-eprom.jpg?​direct&​600 |}} {{ :​repairs:​dishwasher:​milano-dishwasher-eprom.jpg?​direct&​600 |}}
 +
 +The EPROM above gives some clue of the date of the machine as 1995. 
  
 Once the bag was open, I could see three screws holding the PCB to the assembly. Once the bag was open, I could see three screws holding the PCB to the assembly.
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 {{ :​repairs:​dishwasher:​controller-pcb-surface-mount-glue-components.jpg?​direct&​800 |}} {{ :​repairs:​dishwasher:​controller-pcb-surface-mount-glue-components.jpg?​direct&​800 |}}
 +
 +BrokenYugo from the [[https://​www.eevblog.com/​forum | eevblog forum]] managed to date the dishwasher using the date code (9444) of the LM339 chip in the image above. ​
 +
 +<WRAP center round info 90%>
 +1995 seems more likely for a PDIP EPROM or microcontroller in a consumer grade appliance, same for the axial electrolytic capacitor. I could be wrong but I read the date code on the LM339 as 44th week of 94. 
 +</​WRAP>​
  
 ===== Capacitors ===== ===== Capacitors =====
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 {{ :​repairs:​dishwasher:​10uf-replacement.jpg?​direct |}} {{ :​repairs:​dishwasher:​10uf-replacement.jpg?​direct |}}
  
-Finally, there was the ?uf axial capacitor. I wasn't happy with the result of that one either. It came in at ???.+Finally, there was the 100uf axial capacitor. I wasn't happy with the result of that one either. It came in at 87uf and 2.6 Ohms ESR
  
-I had a replacement which read as: ??? which was much better. However it wasn't an axial part. So I had to be a little creative. I used the leg of a rubbish Suntan capacitor to extend the negative leg of my replacement.+I had a replacement which read as: 102uf and .97 Ohms ESR which was much much better. However it wasn't an axial part. So I had to be a little creative. I used the leg of a rubbish Suntan capacitor to extend the negative leg of my replacement.
  
-{{:​repairs:​dishwasher:​axial-capacitor-replacement-parts.jpg?​direct&​600|}} {{:​repairs:​dishwasher:​axial-replacement-construction.jpg?​direct&​600|}}+{{ :​repairs:​dishwasher:​axial-capacitor-replacement-parts.jpg?​direct&​600 |}} 
 +{{ :​repairs:​dishwasher:​axial-replacement-construction.jpg?​direct&​600 |}}
  
 Not super neat but it worked fine. Not super neat but it worked fine.
vulcan_dishlex_milano_dishwasher_repair.1635420206.txt.gz · Last modified: 2021/10/28 11:23 by sausage