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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Panasonic DVD #SA-HT75
I replaced the spindle motor in this since it wasn't working, and it
still doesn't work. Does anyone have experience with this particular model, such as expected motor voltage, or a driver circuit that I should check? I don't have the schematic, this is why I am asking for help. Thanks group. |
#2
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Panasonic DVD #SA-HT75
What do you mean it wasn't working?
The spindle motor did not run at all? Or the DVD player wasn't working and you guessed it was the spindle motor? Did you precision adjust the platter height if you just replaced the motor? Did you perform the laser auto adjustments per the service manual? |
#3
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Panasonic DVD #SA-HT75
What troubleshooting did you FIRST perform in order to diagnose that
the spindle motor was faulty?? When you replaced the motor did you align the hub to the proper and critical height?? In most DVD and CD players, if the laser does not focus for a variety of faults, then the spindle motor will receive voltage and not turn, so don't expect any spindle motor motion until you verify that the laser is emitting and focus lock is achieved and verified. You may want to go to the website for this newsgroup at http://www.repairfaq.org/ there, with some searching, you will find a wealth of troubleshooting tips, repair proceedures, component testing methods and important safety information. electricitym .. .. .. |
#5
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Panasonic DVD #SA-HT75
The player was displaying "disk error". Figuring the disk had to spin
to be read, and wasn't, assumed a bad motor. I haven't aligned the hub yet, because I thought the laser had to be reading a disk to be aligned (feedback while aligning). The laser is emitting, but I was, and am unfamiliar with focus and lock. I will check out the suggested newsgroup for info that I am obviously in big need of. The cost of replacing the motor is of no big deal to me, since I do this as a hobby, and realize I will make these kind of mistakes along the way. I'm not verify familiar with DVD repair or operation, which is why I was unaware of the above focus, lock, etc. You mentioned the motor will receive a voltage to prevent coming on? Do you know what the normal operating voltage/and shut down voltage should be? I'll post results/more questions as I get them. I do appreciate the reply and info. Thanks to all. |
#6
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Panasonic DVD #SA-HT75
I have read some good info on the start up operation/focus. I'm almost
positive I replaced the motor for nothing. Now, assuming I have a focus problem, I don't know how it was out of focus in the first place. This may be the original fault. Is it unheard of to have to perform focus adjustment with no prior invasion of the player, or misuse? I was given the code to access the built in anti jitter software. I will attempt to do this today. Be back soon. Thanks again. |
#7
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Panasonic DVD #SA-HT75
wrote in message Is it unheard of to have to perform focus adjustment with no prior invasion of the player, or misuse? YES... obviously.... of course things can break, become faulty and need repairing even "with no prior invasion of the player, or misuse" -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
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