Pioneer BDR-207DBK Repair

[johnnyesp]

Try cleaning the lasers

Hello, Today I tested the unit after trying different things and I thought about trying a Blue Ray disc since I had tried a DVD disc and a CD disc but it occurred to me to try a Blue Ray disc and it did spin the disc although it seems to have a hard time reading it, I have several questions, I wanted to clarify that it is rather the blue laser that I see that does turn on, I had not seen the red laser turn on but when I tested the Blue Ray disc the red laser also turned on and then the blue one too and the disc spun trying to read the data from the disc, because I only had the unit connected to SATA power not to the PC with the SATA data cable. I am going to test it connected with the SATA data to see if it recognizes the contents of the disc. But among the questions I have are: how to know what the potentiometers are for the CD, DVD and Blue Ray. I have measured them and they are all around 714 Ohms, that is the maximum that I have been able to measure but they are all at the maximum of 714 ohms. What is the potentiometer for each CD, DVD, and Blu-ray player, and how many ohms should each be? Perhaps they're not at the correct value, and that's why it won't read DVD and CD discs. How many ohms should all the motors measure? For example, I measured the ohms of the motor that moves the laser carriage, and they measure around 10.5 ohms to 11 ohms, more or less, and they are the first two contacts and the last two. On the other hand, the central motor that rotates the disc and the different coils measure values ​​like 1.3 ohms, 1 ohm in some cases, up to 2.1 ohms, or rather small velocities between 1 ohm and 2 ohms, not including the multimeter leads. How many ohms should they measure? I would like to see the operation of one of these units, but in good condition, with the lid open to see how each motor should move and how it works in general. Okay, so for now, does anyone know which of the three potentiometers the unit has is the one for CD, DVD, and Blu-ray, and how many ohms each one should be? Thanks.

Did you clean the lasers here how?

eject tray

unplug drive with tray out

pop off front bezel clips on sides and bottom with plastic tool

undo screws from bottom will be under stickers if you have an s13, 213 does not have stickers.

flip backover and remove top cover

clean lasers with a lint free cloth or qtip and alcohol and dry with another do this 2 times and do not let it air dry you must remove the residue with a dry one!

Okay, I need to clean it like you describe. I'll do it as soon as I can. But I have a problem with the motor that moves the laser spinner. I've seen that in other sara drives, but for DVD or CD players, when the drive is turned on, that spinner makes a more complete movement, and regardless of the position it's in or where you manually position it, when you turn the drive on, the laser makes a more complete movement until it's close to the central motor that spins the discs. For example, if I manually position the laser spinner at the end, when I turn on the drive (this means without a disc inserted), the laser moves until it's as close as possible to the central spinner motor. But in my drive, it doesn't make that movement; it's just a very small movement, and in the end, it doesn't even move to the central motor. I even replaced that motor and cleaned some of the dirt and lint that was on the gears, but it's still the same. I also tried slightly reducing the spring that applies pressure because it felt a bit tight and wanted to see if a softer one would make a difference, but it wasn't much. Anyway, I have doubts about the movement of the motor that drives the laser. It should be more complete and even touch the central motor, as I've seen in other CD drives, OPC DVD players, or desktop DVD players that I've seen turn on. I'm going to try putting in the motor I had, but it's the same with the other one I put in. As for the potentiometers, I don't know which one corresponds to each of the three potentiometers it has, and roughly how many ohms they should be. Thanks.

[Billycar11]

Don't worry about the movement that's normal

[johnnyesp]

Don't worry about the movement that's normal

Okay, but I know the potentiometers are out of whack because I've moved them randomly in the past, and they're not the same as before. I also don't know how many ohms they should have. I don't know what the ohms are for the CD, DVD, and Blu-ray players. I should leave the three potentiometers at the factory ohm values, but I don't know the values. The maximum value I've measured on the three potentiometers, measuring the two lower contacts of each one, has been about 714 ohms, more or less. Is that a normal ohm measurement, or should it be more than 1 ohm? I don't know what the values ​​are, or comparing them with another similar unit like this one to see what the standard values ​​are for this model. I've been testing it only with the SATA power supply, not connected to the PC, but yesterday I tested it on the PC, and sometimes if the disk spins while trying to read it, it makes about 3 attempts, but then stops spinning. Although it doesn't always spin all the disks. I notice that the discs spin when the red laser is turned on. At first, it always turns on the blue laser, and then it doesn't always turn on the red laser. If the red laser is turned on, the disc starts spinning, but the red laser doesn't always turn on. And it makes about three attempts to read the disc.

[DavoBR]

Do you know what you are adjusting or trying to adjust?

In my experience it's highly unlikely that adjusting a pot will cure whatever problem you're trying to resolve.

[Coopervid]

I say it again. This is a door stop. Most likely the blue laser is dying and may still work but is much too weak. Fumbling with the pots will not help.

[johnnyesp]

Do you know what you are adjusting or trying to adjust?

In my experience it's highly unlikely that adjusting a pot will cure whatever problem you're trying to resolve.

Yes, I understand, but I'd at least like to try setting the potentiometers to the factory settings, since they were intentionally modified haphazardly without experience. These units have three potentiometers. It would be good to know, or compare with another working unit, how many ohms they have.

[johnnyesp]

I say it again. This is a door stop. Most likely the blue laser is dying and may still work but is much too weak. Fumbling with the pots will not help.

In my unit, the blue LED is the first to light up, and then, although not in all tests, the red LED lights up afterward. However, the blue LED always lights up first and always lights up. On the occasions when the red LED also lights up, it's when the disk starts to spin. I've also modified some potentiometers and tested again, and it does make a difference when trying to read other CD or DVD disks that weren't spinning before. But since I'm doing it randomly, I don't know the correct values ​​for these potentiometers. I asked the user who started this thread, bigrippa4k, if I could measure his potentiometer values ​​and upload photos, but he hasn't responded. I hope I can take measurements for comparison.