Grossel
Well-Known Member
Hi.
Have attempted to reverse engineer the PCB of a garage port opener, and I think I hve got most of it correct. The schematic have some weird things because when having to plan it out backwards, I tend to always assign more voltage sources than neccesary because n the beginning of the process I don't know how many that are in fact used.
For my questions, I start off with the part that probably are impossible to solve.
The in-house IC's
There are two IC. I have not found any useful data sheets online. It would be very helpful if anyone does have datasheet for those, or even just the name of function for each pin. Both are DIL20 package. Semicolon newline.
The variable resistors
The resistors R2 and R3 are marked "1K719K" (no space in between). Since I don't want to de-solder to check I'm not sure what this means in terms of reading the Ohm's, I have simply never seen such markings before.
The possible diac, V10
This component, it looks just like any signal diode but since the band is placed around the center of it's body I assume it's a diac. However, the printed symbol under the component suggest diode.
The look of component is almost excactly like the one depicted on this page <link>
Unsure of the idea of component designation
There are integrated circuits on this board, the opamp (N1), 7805 regulator (N2) and the ULN2004 buffer (N2) while two other IC D1 and D2 (why use different letter ?).
Also "R1" aren't a resistor but a thick sturdy jumper.
The diodes have V1, V2, etc. but the ceramic resonators also use V (assigned V11 and V12).
Inputs not used - X4 and X5 (not important)
Those are simply put - connectors with housing on the PCB that allow a pin to be pushed in from the soldering side of the PCB. When the PCB is in place in the housing (same as where the motor and connection to puley) - each of those are connected to two U-shaped metal clips that pokes out underneath the housing. In this particular model, they was never in use (the only way of making contact is to use a tool or fingers to bend the clips toward each other).
On X4, there is a marking on the PCB "AUF", and for X5 the marking are "ZU". I guess german.
I think either it must be a command (maybe supposed user may have a rope somewhere outside to pull to open the gate), or it may be input from the pulley. From the location I'd say most likely it's signal for pulley all the way out and all the way in (but for a different model than this that have some mechanical piece that makes contact at touch ).
Have attempted to reverse engineer the PCB of a garage port opener, and I think I hve got most of it correct. The schematic have some weird things because when having to plan it out backwards, I tend to always assign more voltage sources than neccesary because n the beginning of the process I don't know how many that are in fact used.
For my questions, I start off with the part that probably are impossible to solve.
The in-house IC's
There are two IC. I have not found any useful data sheets online. It would be very helpful if anyone does have datasheet for those, or even just the name of function for each pin. Both are DIL20 package. Semicolon newline.
- D1 ; (Motorola icon) ; 8787345951 CP1 ; 5C40H ; QLTB9724
- D2 ; BOSCH ; P9724AD - DBG ; 8 787 345 899
The variable resistors
The resistors R2 and R3 are marked "1K719K" (no space in between). Since I don't want to de-solder to check I'm not sure what this means in terms of reading the Ohm's, I have simply never seen such markings before.
The possible diac, V10
This component, it looks just like any signal diode but since the band is placed around the center of it's body I assume it's a diac. However, the printed symbol under the component suggest diode.
The look of component is almost excactly like the one depicted on this page <link>
Unsure of the idea of component designation
There are integrated circuits on this board, the opamp (N1), 7805 regulator (N2) and the ULN2004 buffer (N2) while two other IC D1 and D2 (why use different letter ?).
Also "R1" aren't a resistor but a thick sturdy jumper.
The diodes have V1, V2, etc. but the ceramic resonators also use V (assigned V11 and V12).
Inputs not used - X4 and X5 (not important)
Those are simply put - connectors with housing on the PCB that allow a pin to be pushed in from the soldering side of the PCB. When the PCB is in place in the housing (same as where the motor and connection to puley) - each of those are connected to two U-shaped metal clips that pokes out underneath the housing. In this particular model, they was never in use (the only way of making contact is to use a tool or fingers to bend the clips toward each other).
On X4, there is a marking on the PCB "AUF", and for X5 the marking are "ZU". I guess german.
I think either it must be a command (maybe supposed user may have a rope somewhere outside to pull to open the gate), or it may be input from the pulley. From the location I'd say most likely it's signal for pulley all the way out and all the way in (but for a different model than this that have some mechanical piece that makes contact at touch ).
