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Pet 8296D no signs of life

Desperado said:
Hi Dave, please how can i test this controller?? :(
Click to expand...
That is an unnecessary question. With all that you have been taught, you should review the last drive troubleshooting with the speed controller, and try to repeat the steps using the proper schematic. If you hit a dead end, then it is fair to ask a question based on the new troubleshooting.
 
Your photographs in post #494 shows the wire colours and pin numbers for the connector. They appear to align with the schematic in the manual I linked to a while ago:

1668510203423.png

If nothing else, can you use your multimeter to measure between the following pins please:

Pin 4 (BLACK wire) to your multimeter BLACK lead.

Measure pin 1 (RED wire) - It should be approximately +5V.

Measure pin 3 (ORANGE wire) - It should be approximately +12V.

Measure pin 5 (WHITE wire). This should be HIGH (when the motor is not running) and should go LOW when the motor should be turned on.

There is no schematic for the motor speed controller - so you will have to find it and photograph it. Note the IC numbers. Follow the RED, ORANGE, BLACK and WHITE wires from pins 1, 3, 4 and 5 of the connector to the speed control PCB.

It is not that difficult, and you should be able to to this yourself.

Dave
 
dave_m said:
That is an unnecessary question. With all that you have been taught, you should review the last drive troubleshooting with the speed controller, and try to repeat the steps using the proper schematic. If you hit a dead end, then it is fair to ask a question based on the new troubleshooting.
Click to expand...
Hi Dave, this is different respect the other drive :(
 
It is the same - but different.

This is why you need to understand the process rather than just repeating exactly the same thing as you did last time...

The process is to (a) match your physical hardware up to the various manuals and schematics on the internet. Draw out connector pinouts etc. (b) make sure that the correct voltages are present. (c) see that the correct control signals are getting to the drive (in this case -MOTOR ON).

Dave
 
daver2 said:
Pin 4 (BLACK wire) to your multimeter BLACK lead.

Measure pin 1 (RED wire) - It should be approximately +5V.

Measure pin 3 (ORANGE wire) - It should be approximately +12V.

Measure pin 5 (WHITE wire). This should be HIGH (when the motor is not running) and should go LOW when the motor should be turned on.
Click to expand...
PIN 1: 5V
PIN 3: 12,2 V
PIN 5: 5 V

In my board connector are named as P5
 
I am desperate!!! Where i can found a replacement drive for my 8296D ??? :(
 
Then so far so good. Monitor pin 5 with the scope, while you attempt a Directory command to that drive with a good disk inserted. Do you see a negative pulse on pin 5 (/Motor on)?
 
dave_m said:
Then so far so good. Monitor pin 5 with the scope, while you attempt a Directory command to that drive with a good disk inserted. Do you see a negative pulse on pin 5 (/Motor on)?
Click to expand...
But if i must measure pin 5, i need to remove drive s' connector :(
 
Ok ok, I still managed to connect the probe to pin 5 with the connector connected. When I turn on the computer, I see a line at about 5V ... if I try to read a directory, the signal goes to about 1V
 
Ok,

So that means the logic/analogue board is trying to turn on the motor - yet it doesn't run...

So, follow the white wire from pin 5 of the connector until it terminates in a PCB. The PCB is the speed controller board.

Take a photograph of this board (with plenty of light)...

Dave
 
Unfortunately to do this I have to disconnect everything, unscrew the drive from its seat ... the board is right below :(
 
Dave, i am desperate now!!
 

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I don't know... :(
Looks like a bit of green is missing ... and I see oxidized welds
What can i do now ??
 
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