Thanks
So if it's going counterclockwise?
Can you just swap the drive motor connections around?
So if it's going counterclockwise?
Can you just swap the drive motor connections around?
If you have not done anything to the wiring connections the drive should not spin anti-clockwise. If that is the case it means there is something wrong with the servo circuit.
This has happened to me countless times - disc doing odd things.
I recommend you take the board out, heat up the iron, get your DMM and do continuity tests around the 5v reg, servo control and decoder. It could be a lifted pad around one of the small capacitors.
I recommend you take the board out, heat up the iron, get your DMM and do continuity tests around the 5v reg, servo control and decoder. It could be a lifted pad around one of the small capacitors.
Thanks Ben.
I have a couple of things to investigate as well as this all started when I changed the laser mechanism. So I'm going to backtrack and check everything was replaced properly. it's a while since I did it though. The mechanism has 4 pins that slide into runners on the transport. Am I dreaming or did they have rubber/plastic sleeves on them, or do they go in as they are?
I have a couple of things to investigate as well as this all started when I changed the laser mechanism. So I'm going to backtrack and check everything was replaced properly. it's a while since I did it though. The mechanism has 4 pins that slide into runners on the transport. Am I dreaming or did they have rubber/plastic sleeves on them, or do they go in as they are?
I have two players both with servo issues at the moment,While trying to test voltage from a good player i slipped and shorted a servo ic tca0370dp2 now my deck spins backwards flat out.
cheers guys alan
ps anyone know of a supplier for the ics
cheers guys alan
ps anyone know of a supplier for the ics
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transport
The runners have no sleeves they run direct plastic to plastic only grease to make it run smooth .The laser is mounted on shock absorbing rubbers tho x4.
hope that helps alan🙂
The runners have no sleeves they run direct plastic to plastic only grease to make it run smooth .The laser is mounted on shock absorbing rubbers tho x4.
hope that helps alan🙂
I also blew one of the same ICs in the past and got a replacement from eBay:
TCA0372DP2 Integrated Circuit x 1 pieces | eBay
servo
i may replace all 3 voltages are all over the place @ the moment. £5 each or there about.
thanks highlander alan😉
i may replace all 3 voltages are all over the place @ the moment. £5 each or there about.
thanks highlander alan😉
Checked the 5v supply. The 7805 seems okay. The display does light up btw, maybe didnt see it properly before. The other regs I installed near the driver ics' all measure around 8v. Any suggestions to have a look? Never had this fast spinning before.
the driver ics x3 are un regulated on a standard machine so you should have 10 to 11v +and -
So you installed some extra 7808 and 7908 for the servo driver IC's?
Can you show or explain how and where you've added these in? Is there a chance you have a positive and negative regulator mixed up anywhere?
Don't forget to check for lifted pads. Seriously, I've had this exact problem lots of times.
I'd check around servo control and decoder, c505, etc
Another thing you can do is very gently touch the tops of some components while the disc is spinning and see if it affects it (being mindful of mains voltage, obviously).
I'd check around servo control and decoder, c505, etc
Another thing you can do is very gently touch the tops of some components while the disc is spinning and see if it affects it (being mindful of mains voltage, obviously).
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Re: Regs, that's true... Hopefully you mean around 8v +/-!
Easy to check. Just refer to the driver reg pin-outs in the service manual and check the voltages are correct on each pin.
Apologies if I'm teaching my grandmother to suck eggs here - it's a fine line to walk.
Good luck!
Easy to check. Just refer to the driver reg pin-outs in the service manual and check the voltages are correct on each pin.
Apologies if I'm teaching my grandmother to suck eggs here - it's a fine line to walk.
Good luck!
Totally agreed with you Ben. I have encountered similar problem with copper strips of the PCB. As the PCB is more than 10 years old the strips can be damaged and peeled off easily in particular when too much heat is applied. I need to use jumper wires to bypass the damaged strips.
Just been sharpening my soldering skills by making a flea, prior to tackling the main job, only to discover I don't have the smd 33r resistors, just as well I have a trolley up to about £18 at Farnells waiting to top-up to the obligatory £20.