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DVP-CX777ES Repair

Jesse18

New Member
I bought a Sony DVP-CX777ES on ebay that had no power. I repaired to power supply board and replaced the belts. The problem now is the CD loading motor continues to run while a CD has been loaded into the player mechanism. I am stuck. Does anyone have experience repairing this model?

Thank you in advanced!
 

Nigel Goodwin

Super Moderator
Most Helpful Member
That's normally when the loading belt needs replacing, the very last part of loading is a bit tighter, so it gets so far but won't quite reach the end - there's a limit switch that it triggers when it gets there which tells it to kill the motor.

If you try and load a disc with it in pieces, you should be able to see the belt slipping or not - a good belt will probably stall the motor. While it's slipping try manually turning the target pulley, you usually find a turn or two will make it work.

I've got a small Sony DVD player that does the same, I got it as the customer bought a new one - but the belt was no longer available, and I've never bothered trying to find a suitable third party belt - but it works perfectly with the finger spinning trick :D
 

Jesse18

New Member
That's normally when the loading belt needs replacing, the very last part of loading is a bit tighter, so it gets so far but won't quite reach the end - there's a limit switch that it triggers when it gets there which tells it to kill the motor.

If you try and load a disc with it in pieces, you should be able to see the belt slipping or not - a good belt will probably stall the motor. While it's slipping try manually turning the target pulley, you usually find a turn or two will make it work.

I've got a small Sony DVD player that does the same, I got it as the customer bought a new one - but the belt was no longer available, and I've never bothered trying to find a suitable third party belt - but it works perfectly with the finger spinning trick :D
Thank you for the reply, I will try it out. I have seen people selling clear silicon O rings as replacement "belts". They come in thousands of sizes and readily available (aka at hardware stores for cheap). I am going to order some and report back on my progress.
 

Jesse18

New Member
I replaced switch S621 on the loading SW board as shown on page 76 of the repair manual. When I plug in the unit the motor spins and stops after closing S621, when I power on the unit the motor starts spinning again. I fear the controller board is bad but I can't find a replacement.
 

Nigel Goodwin

Super Moderator
Most Helpful Member
I replaced switch S621 on the loading SW board as shown on page 76 of the repair manual. When I plug in the unit the motor spins and stops after closing S621, when I power on the unit the motor starts spinning again. I fear the controller board is bad but I can't find a replacement.
It would be extremely unlikely that the controller board would be faulty, the belt slipping, possibly a broken switch, or misalignment would be much more likely.
 

Jesse18

New Member
Selecting number 1 or 2 on menu just leads me to a blank blue screen. I am able to select 0. Syscon Diagnosis and run through the test all function.
I can select 4. Emergency History and it gives me several error codes but I can't seem to find what they mean at all. I have searched across the internet.
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