Hello,
I recently purchased a Sony CDP-102 CD Player that is in excellent working condition except for the CD Tray which doesnt stay open. When the open/close button is selected the tray does open but then closes immediately making the task of inserting a CD almost impossible. However, the seller found a trick to keep the CD tray open by using their hand to stop it which can be seen in the youtube link. I am not sure what tells the CD tray to stay open so was wondering if anyone here had any past experiences or recommendations to correct this issue.
https://www.youtube.com/watch?v=2oZ-BxZMjG0&list=WL&index=10
Thanks
I recently purchased a Sony CDP-102 CD Player that is in excellent working condition except for the CD Tray which doesnt stay open. When the open/close button is selected the tray does open but then closes immediately making the task of inserting a CD almost impossible. However, the seller found a trick to keep the CD tray open by using their hand to stop it which can be seen in the youtube link. I am not sure what tells the CD tray to stay open so was wondering if anyone here had any past experiences or recommendations to correct this issue.
https://www.youtube.com/watch?v=2oZ-BxZMjG0&list=WL&index=10
Thanks
Hello. Most CD player trays use two switches in order to detect closed and open position. When you press the eject button, the motor activates and begins opening the tray. At this point in time the microprocessor waits for the "tray closed" switch to toggle it's state (closed/open), after a few seconds the "tray open" switch must also toggle it's state signaling that the tray opened correctly. Otherwise, the microprocessor will detect a problem. Check the operation of the two switches. They are most probably old and have oxidized metal contacts.
Almost certainly microswitches as rrrremus mentions.
Post #1 here details the problem and how to clean a typical switch.
http://www.diyaudio.com/forums/digital-source/226288-sony-cdp790-kss240-restoration-project.html
Post #1 here details the problem and how to clean a typical switch.
http://www.diyaudio.com/forums/digital-source/226288-sony-cdp790-kss240-restoration-project.html
Thanks rrrremus and Mooly. That example in the other thread looks super helpful and detailed. I will attempt to fix the CD Player following that post and hope I dont screw things up and let you know.
I opened up the CD Player and just wanted to confirm the locations of the microswitches in the picture below. Is it located on the motor which is connected to the rack and pinon gear that opens up the player? If so, any recommendations on how to best remove it without causing damage to the other internals. Thanks.
Its one of those things you need to have in front of you.
That looks like its a microswitch to detect when the tray has fully loaded, there will probably be another that operates when the tray has opened fully (which could be under the tray itself).
That looks like its a microswitch to detect when the tray has fully loaded, there will probably be another that operates when the tray has opened fully (which could be under the tray itself).
Update
Just wanted to give everyone an update here.
I completely removed the cd tray and inspected the bottom and didnt find anything unusual. Then I looked at the top side again and noticed the microswitches which are different than other CD players. I highlighted in the picture below the two microswitches that I believe detect open and close. Its a small black box with a small thin piece of sheet metal that sticks out. When those are depressed, that indicates the tray is open or closed. In the picture below, the tray is closed so the bottom switch is activated and you cant see the thin piece of sheet metal, however, the top switch which detects open, you can see the sheet metal.
In terms of this problem, both appear to being activated with no issues so I didnt touch anything and reattached the whole tray assembly. I turned the player on and messed around with the open/close and it seems that the problem has gone away for about 90% of the time. So I was thinking about a key statement mentioned in Mooly's post linked in this thread which is "that grease is applied to the rods to slow the tray down." I believe I noticed the tray operate slower which I guess allows the microswitch to detect open but I am not entirely sure why the tray needs to be slowed down in order to detect open. At any rate, I must have spread the existing grease on the rods during handling as that was the only part I could really use to handle the tray so that I didnt screw up the internals.
With that said, it looks like I need to add more grease to the rods but I am wondering what is recommended for Sony's CD Players? Is it like an auto grease?
Just wanted to give everyone an update here.
I completely removed the cd tray and inspected the bottom and didnt find anything unusual. Then I looked at the top side again and noticed the microswitches which are different than other CD players. I highlighted in the picture below the two microswitches that I believe detect open and close. Its a small black box with a small thin piece of sheet metal that sticks out. When those are depressed, that indicates the tray is open or closed. In the picture below, the tray is closed so the bottom switch is activated and you cant see the thin piece of sheet metal, however, the top switch which detects open, you can see the sheet metal.
In terms of this problem, both appear to being activated with no issues so I didnt touch anything and reattached the whole tray assembly. I turned the player on and messed around with the open/close and it seems that the problem has gone away for about 90% of the time. So I was thinking about a key statement mentioned in Mooly's post linked in this thread which is "that grease is applied to the rods to slow the tray down." I believe I noticed the tray operate slower which I guess allows the microswitch to detect open but I am not entirely sure why the tray needs to be slowed down in order to detect open. At any rate, I must have spread the existing grease on the rods during handling as that was the only part I could really use to handle the tray so that I didnt screw up the internals.
With that said, it looks like I need to add more grease to the rods but I am wondering what is recommended for Sony's CD Players? Is it like an auto grease?
I have the same problem with Marantz CD6200. I have been looking for some insight for over 2 years. Thanks for posting and I hope it goes well.
The grease needs to be something like this which is totally plastics safe, which is important because grease always migrates.
If the player is improving with keep opening and closing the tray then it could still be a micro switch problem. The contacts could be tarnished and causing "bounce" as they operate which confuses the system control IC. Can you get any contact cleaner in there (maybe remove them and give them a good blast through any opening).
SPG35SL - ELECTROLUBE - SPECIAL PLASTICS GREASE 35ML | CPC
(I know it raises eyebrows but if no one were looking 😛 a quick squirt of WD into the switch could work wonders. There is a new WD contact cleaner available now specifically for electrical stuff, quite expensive though)
If the player is improving with keep opening and closing the tray then it could still be a micro switch problem. The contacts could be tarnished and causing "bounce" as they operate which confuses the system control IC. Can you get any contact cleaner in there (maybe remove them and give them a good blast through any opening).
SPG35SL - ELECTROLUBE - SPECIAL PLASTICS GREASE 35ML | CPC
(I know it raises eyebrows but if no one were looking 😛 a quick squirt of WD into the switch could work wonders. There is a new WD contact cleaner available now specifically for electrical stuff, quite expensive though)
Another Update
Here is another update as I have found more information.
So after continuing to test the CD tray throughout the day, the number of instances where the tray was opening and closing started to increase. I tried the cheap homemade solution suggested by Mooly to use WD-40 to clean the microswitch but it didnt make a difference.
So after staring at the CD tray for minutes playing with it opening and closing, I realized that there are 4 microswitches and not 2 as I mentioned in previous posts. And this makes sense because I was wondering when the microswitch in the middle left of the picture below (red circle) detects the tray is fully opened when it gets activated immediately before the tray reaches full opening position.
And thats where another microswitch that was not previously identified comes into play shown in the top yellow box. Its hard to see from the first picture so I captured a zoomed in picture below that shows it. Its located under the rod which is hard to reach. Its an Omron sensor like the others but slightly different that uses a toggle style switch vs. the thin aluminum sheet metal. As the tray is opening, this toggle switch gets depressed indicating the tray has reached a fully opened position. I am guessing that this switch was getting stuck or for some reason not compressing completely. So I played with it a little bit to free it up. Its hard to see whats going on because it gets covered by the moving mechanism on the rod. But I dont want to remove it at this time because its access is difficult. So far it appears to be working okay now but I have been checking it multiple times during the day. As you can see, I have become obsessed with fixing this issue. At least if it starts happening again, I know what the problem is.
There is also another microswitch at the bottom of the picture in yellow that detects close. So to summarize, the bottom yellow switch detects the tray is fully closed via the rod, the red switch to the right that detects the tray is closed via the tray (not sure why there are two), the red switch in middle left that detects the tray is moving, and the top yellow switch that detects the tray is fully opened via rod.
Here is another update as I have found more information.
So after continuing to test the CD tray throughout the day, the number of instances where the tray was opening and closing started to increase. I tried the cheap homemade solution suggested by Mooly to use WD-40 to clean the microswitch but it didnt make a difference.
So after staring at the CD tray for minutes playing with it opening and closing, I realized that there are 4 microswitches and not 2 as I mentioned in previous posts. And this makes sense because I was wondering when the microswitch in the middle left of the picture below (red circle) detects the tray is fully opened when it gets activated immediately before the tray reaches full opening position.
And thats where another microswitch that was not previously identified comes into play shown in the top yellow box. Its hard to see from the first picture so I captured a zoomed in picture below that shows it. Its located under the rod which is hard to reach. Its an Omron sensor like the others but slightly different that uses a toggle style switch vs. the thin aluminum sheet metal. As the tray is opening, this toggle switch gets depressed indicating the tray has reached a fully opened position. I am guessing that this switch was getting stuck or for some reason not compressing completely. So I played with it a little bit to free it up. Its hard to see whats going on because it gets covered by the moving mechanism on the rod. But I dont want to remove it at this time because its access is difficult. So far it appears to be working okay now but I have been checking it multiple times during the day. As you can see, I have become obsessed with fixing this issue. At least if it starts happening again, I know what the problem is.
There is also another microswitch at the bottom of the picture in yellow that detects close. So to summarize, the bottom yellow switch detects the tray is fully closed via the rod, the red switch to the right that detects the tray is closed via the tray (not sure why there are two), the red switch in middle left that detects the tray is moving, and the top yellow switch that detects the tray is fully opened via rod.
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