Re: What kind of diode is this?
you probably need to clean the old crap out and re-lube them.
you probably need to clean the old crap out and re-lube them.
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Re: What kind of diode is this?
They are brushless DC motors and they use electronics to synthesize AC. The electronics will automatically generate the correct phasing so that there's no need for the capacitor to do so to generate the other phase (compare to 3-phase AC motors instead of 1-phase AC motors.)Comment
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Re: What kind of diode is this?
Rule out mechanical problems before going into the electronics.
I would first clean out the old lube with q-tip and IPA. After 35 years, the original grease and oil is gummed up. The worm shaft for the head stepping motor needs grease, and guide shaft needs oil. The disk motor probably needs oil but should not be stiff as to not start spinning without help.
The disk motor circuit may be the same FC-9 as the later OA-32V pcb 1-609-924-11
I'm not sure what the "FG print coil, 60 pieces" is on CN1, as a tachometer circuit?
It's not like an AC motor with start cap. There's several 1uF,10uF ,100uF caps which could upset the tach. No datasheet on Sony CX-069A it might be a PLL for speed regulation.
For the diode D2 smoking, if the wiring is not shorting and the connector was not put on backwards, I would check the resistance of the stepper motor's four windings, and continuity to the motor case.
A fault to GND on CN5 pin 1 or 2 is what I would see overloads the diode.Comment
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Re: What kind of diode is this?
Thanks for that excellent idea redwire thats something i will check as ive checked and nothing could have shorted in the connectors.Comment
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Re: What kind of diode is this?
your lucky btw, some old drives have a belt!Comment
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Re: What kind of diode is this?
Well I had the new diodes arrive. I put a new diode in and tested the transistor its connected to, which was ok and then rebuilt the drive again, looking carefuly this time to see what could have caused the short the last time but I still cannot understand where it shorted. Anyway its back together and its working just as it should but like all the other drives, its now not booting any system disks. I only ever did get one of these drives booting when I first restored the computer but now I have 4 drives in nice clean condition, all working but unable to boot a disk. I have no idea what to do now, it might be alighnment but I havent altered that. This drive only stopped working originally after a tried a floppy out of another old apriocot in it. So its crazy all this happed just because of tried a floppy out of another aprocot in it. Oh ho I wish I hadn't.. At least its working again and not smoking.
Just to get it to read a disk again ...Comment
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Re: What kind of diode is this?
did you clean the heads yet with ipa??Comment
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Re: What kind of diode is this?
I cleaned the heads with Surgical spirit. They are nice and shiny clean..Comment
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I have bought this Zener Diode for this project what size and wattage resistor value do I need to use to get near 50 watt output
I bought this from an eBay seller but unfortunately they only had one
I bought three from Vetco Electronics these are Sylvania ECG5185A 9.1@10w A to Stud what size and watt resistor do I need to use to get near 10 watt output
I bought three of from them to also make battery packs with this output power limit in mind
I want to use this battery pack and turn it into a 9.1 output battery pack output to eliminate using 9 volt battery... -
Hi, I'm looking for a bit of help trying to fix the audio unit from a Maestro Mayhem 4.1 gaming chair please.
The chair has a few speakers and vibration motors. All was well, for a while, but now the sound is gone.
It may be significant that I discovered my son was powering it with a 19V laptop charger when it should run on 12V - it did fully work, for bit.
I think an issue could be a zener diode (or capacitor) which has shorted out.
The board's bluetooth input still works, the vibration motors are working, so is the line out socket but not the... -
My Element 32 inches tv (ELEFW328B) lost it's backlight (confirmed with a flashlight test) and the connector on the PCB (it has one board that has a processor chip, switch mode power supply, and backlight circuit) that has the two wires that go to the backlight LED strips has a very low voltage (28-29 volts) when turned ON, in my opinion.
Started testing components and found an SMD diode or zener that is shorted (even zero fusing resistors read a few tens of milliohms, while this thing reads zero).
I put some pictures here to show that it is labeled "M7".... -
Hey there guys. I've got a Corsair power supply that's come across my bench dead. I usually don't mess with power supplies, but it's a slow week so I'm giving it a whirl.
Taking it apart I heard a screw rattling around inside, and when I got it apart I found a couple blown components near what I think is the 5VSB area.
There's a 22ohm resistor that's melted and open, but it still has the bands.
The other part is a zener diode and it's top went to jesus, so I can't read the marking.
It looks like the diode connects the source and drain of a TNY284... -
Hello,
im actually trying to save a d1500 delay from yamaha. I found the service manual but schematic is missing and BOM list is a bit unclear as components listed have no reference linked to the pcbs... In my case, one zener diode was broken (114 code on the pcb in attached file) and couldn't be repaired : it was a zener type package. In the BOM list i found 3 reference on this board : 1S555 (can be replaced by 1N4148), RD4.7EB2 (approx 5v rectifier), RD7.5EB3 (approx 7v rectifier)...
Actually the cathode goes to VCC of sram M5M5118P, without this diode missing, i have...
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