Hi all electronics freaks out there,
I have broken motor driven rollo winder. It is exactly this one:
http://www.lottgmbh.com/uploads/media/Eck41009_R-23300A_Aufputz.pdf
(It is in German language but you can get an idea what it is)
As fixing things is my hobby and quite a lot of fun, I'm trying to fix it and also learn something from it
I started with drawing circuit schematic in Eagle (please take a look at the attachment) and trying to figure out how does it work. Spent almost full day doing that
Before continue let me start with few facts:
1. SV1 is connector that is connected to microcontroller board
2. Line 12 on SV1 is PIC Vref
3. Line 8 and 9 are PIC output for controlling motor motion
I asume motor motion is controlled this way:
L8 | L9 | Motor motion
-------------------------
1 | 1 | Stop
1 | 0 | Forward
0 | 1 | Backwards
0 | 0 | Stop
..............................
4. SV2 is connector for light (sun) sensor - unused as I don't have it
5. VT06 and VT07 are power Mosfets P & N
Datasheet: http://www.vishay.com/docs/65922/si4564dy.pdf
6. U3 is quad OP-AMP
Datasheet:
http://www.ti.com/general/docs/lit/getliterature.tsp?literatureNumber=slos066t&fileType=pdf
7. Output (drain) of the VT06 and VT07 is connected to the motor (not drawn on attached schematic)
It is 24V motor Model FS-398PH-18110 (http://www.neuhold-elektronik.at/datenblatt/N0070.pdf)
Now my questions!
1. Take a look at the OP-AMP 1IN+, 1OUT and SV1 line 4.
I don't understand for what this is used. SV1 line 4 is probably INPUT, but why transistor (and circuit around it) VI02 and VT01 are there? Do you think it may be some kind of "current sensor" ? If so how does it work?
2. I also don't understand why VT02 is there? It looks as it doesn't have any function.
3. I think there must be some kind of protection if motor (rollo) is stucked, but I just can't find it.
If anyone could help me explain this two parts of the circuit or at least give me some hint, I would be very thankful.
If you need any additional details please let me know. If needed I can also draw second bord with PIC and measure all resistors values.
Regards,
Gregor
P.S: Happy new year 2013 !
I have broken motor driven rollo winder. It is exactly this one:
http://www.lottgmbh.com/uploads/media/Eck41009_R-23300A_Aufputz.pdf
(It is in German language but you can get an idea what it is)
As fixing things is my hobby and quite a lot of fun, I'm trying to fix it and also learn something from it
I started with drawing circuit schematic in Eagle (please take a look at the attachment) and trying to figure out how does it work. Spent almost full day doing that
Before continue let me start with few facts:
1. SV1 is connector that is connected to microcontroller board
2. Line 12 on SV1 is PIC Vref
3. Line 8 and 9 are PIC output for controlling motor motion
I asume motor motion is controlled this way:
L8 | L9 | Motor motion
-------------------------
1 | 1 | Stop
1 | 0 | Forward
0 | 1 | Backwards
0 | 0 | Stop
..............................
4. SV2 is connector for light (sun) sensor - unused as I don't have it
5. VT06 and VT07 are power Mosfets P & N
Datasheet: http://www.vishay.com/docs/65922/si4564dy.pdf
6. U3 is quad OP-AMP
Datasheet:
http://www.ti.com/general/docs/lit/getliterature.tsp?literatureNumber=slos066t&fileType=pdf
7. Output (drain) of the VT06 and VT07 is connected to the motor (not drawn on attached schematic)
It is 24V motor Model FS-398PH-18110 (http://www.neuhold-elektronik.at/datenblatt/N0070.pdf)
Now my questions!
1. Take a look at the OP-AMP 1IN+, 1OUT and SV1 line 4.
I don't understand for what this is used. SV1 line 4 is probably INPUT, but why transistor (and circuit around it) VI02 and VT01 are there? Do you think it may be some kind of "current sensor" ? If so how does it work?
2. I also don't understand why VT02 is there? It looks as it doesn't have any function.
3. I think there must be some kind of protection if motor (rollo) is stucked, but I just can't find it.
If anyone could help me explain this two parts of the circuit or at least give me some hint, I would be very thankful.
If you need any additional details please let me know. If needed I can also draw second bord with PIC and measure all resistors values.
Regards,
Gregor
P.S: Happy new year 2013 !
Attachments
-
34.2 KB Views: 30