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H920+ Service/Repair Manual
- Thread starter FLDirector19
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It could be either. Slow blinking shows the module is getting power. The failure to transition to a faster blinking rate implies it is not receiving the signal from the Flight control board that tells it to enter the binding mode. That could be a bad wire, a bad connector, a bad 2.4 module, a bad flight control board, bad firmware or possibly even some problem with the main ESC board.
Have you looked closely at the connector on the SR24 module to ensure all four pins are fully inserted and latched in the connector? (I think the gray wire carries the signal to initiate binding.)
Please clarify that the orange light on the 2.4 module itself is NOT (or is) changing flash rate when tilted forward. By reading between the lines I'm pretty much assuming it is NOT changing. But it would be good if you could make a direct statement.
Have you looked closely at the connector on the SR24 module to ensure all four pins are fully inserted and latched in the connector? (I think the gray wire carries the signal to initiate binding.)
Please clarify that the orange light on the 2.4 module itself is NOT (or is) changing flash rate when tilted forward. By reading between the lines I'm pretty much assuming it is NOT changing. But it would be good if you could make a direct statement.
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Ok… here is the latest update, with photos.
I checked the voltage on the H920+ batteries & charged them to 23v, while I charged the ST24 to 90%.
Checked the SR24 to see if the yellow light flashed faster after the tipping… it did.
I put the aircraft back together, reattached the CGO4, then turned on the ST16 (see photo 1). Almost immediately, I got a (Obs avoidance failed. Error). I know the H920+ doesn’t have obstacle avoidance, so I wasn’t concerned.
Started the H920+, tipping it twice, then refreshed the screen to Bind. Sometimes the SR24xxxx would appear, other times not. The CGO4 spun in a 360 circle, as if it was initializing, sometimes it would say it was binding, other times not. Even when the SR24xxxx and CGO4 were on the screen, and I initiated a BIND, the Status Lights still flashed white, red, blue, green.
When I verified the Hardware Monitor, all of the switches and dials worked except the T1 & T2 (They didn’t have full range, only the little I photographed.)
I’ve added some photos of various steps along the way.
Do you feel the SR24 is bad?
Almost immediately, I got a (Obs avoidance failed. Error). I know the H920+ doesn’t have obstacle avoidance, so I wasn’t concerned.
I tend to agree. I don't have an H920+ to compare, so I selected an H920 model and a CG04 on an ST16, then bound the ST16 to a Q500 (which also does not have OBS). I got the same OBS failure indications. Not 100% conclusive, but it tends to agree with your opinion that the indication is normal. But there is an interesting caveat to that. When the drone is not powered on, the OBS alarm is not present. This seems important. It suggests (that at least at some level) your controller is actually already bound to the H920. Or at least somehow communicating with the OBS. YOU CAN TEST THIS THEORY BY OBSERVING IF THE OBS FAILURE IS ONLY PRESENT WHEN THE H920 IS POWERED ON. A contradiction to this line of thought is that your screenshots are not showing any telemetry. If it were bound, the telemetry should be there. (Yeah, I'm confused.)
When I verified the Hardware Monitor, all of the switches and dials worked except the T1 & T2 (They didn’t have full range, only the little I photographed.)
I think that's normal. Mine's the same way.
The CGO4 spun in a 360 circle, as if it was initializing, sometimes it would say it was binding, other times not.
Do you mean the actual camera was spinning? If the actual camera was spinning, it might mean something. Some clarification. If the actual CGo4 is spinning, it's from the gimbal part of the CGo4, not from the camera part of the CGo4. The CGo4 Gimbal is part of the SR24xxx binding, not the camera binding. But no, it's probably not supposed to be spinning. At least it doesn't on the other H series models I'm familiar with. We might need to look at that in more detail later. If you meant something else was spinning, none of this applies.
Checked the SR24 to see if the yellow light flashed faster after the tipping… it did.
Sometimes the SR24xxxx would appear, other times not.
Another clarification might be in order. We tend to think of the binding as being between the ST16 and the drone. I'm pretty sure that's not exactly accurate. I believe the control signal (2.4Ghz) binding is actually between the ST16 and the SR24xxx itself. In turn, the SR24xxx is bound to the drone via two of the four wires and requires no additional action from us. This is important because if I am correct, it may mean the problem is either in the SR24xxx or in the ST16. (Which contradicts another possible line of thought I will discuss later. Bummer.)
Even when the SR24xxxx and CGO4 were on the screen, and I initiated a BIND, the Status Lights still flashed white, red, blue, green.
The "White" you mention worries me. There is no white as part of any of the Red/Green/Blue sequences listed in the manual. Is the "white" a part of the same consistent sequence as the other three colors or does it flash somewhat out of step with the other three?
Also, the sequence (according to the manual), should be RED-GREEN-BLUE. Not RED-BLUE-GREEN. Are you certain of the order of the colors?
The manual says the H920+ uses Red/Green/Blue to indicate low battery level, and it is also associated with accelerometer calibration. The H920 manual does NOT mention Red/Green/Blue during FC0 initialization, but earlier models, such as Q500, did. Which brings up another question. Way back in Post #5 you said, "The top needed to have the three wires for each arm removed for the top to come off (plus the GPS cable.)". I believe you have assembled the H920+ again. Are ALL motor wires/GPS, and everything else correctly connected now?
Back to the "line of thought I will discuss later"; I think you currently have the new FC0 module installed. Is there any difference in LED (W/R/G/B) light sequence between the old and new FC0? Is there any chance the two FC0s got mixed up on the work bench, and you inadvertently reinstalled the original? (Don't laugh. I've done that.)
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A note to add on the 17 2mm screws, 4 of them are very slightly longer, if you're looking at them wondering where these for go, they go into positions 7,8,9&10 these are the four behind the battery door.
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Thanks to everyone that supplied ideas, thoughts and suggestions.
I was reviewing old posts this morning and realized I left this activity hanging.
I actually returned it to the supplier, finding out he is a member of this forum and has been watching the exchange of posts.
Purchased a *new* H920+, and so far it is phenomenal!! Not to worry, I’ll be back if I have issues with this one!
Salve è possibile una foro di come è istallato il gps sul h 920 Grazie in anticipo
Non sono sicuro di ciò che state chiedendo. L'H920 e l'H920+ non sono uguali per quanto riguarda il collegamento al GPS.
Sull'H920 originale, il GPS si collega al modulo IMU. Il cavo dal modulo IMU porta sia l'IMU che il GPS al modulo di controllo del volo.
Se questo non è ciò che avete chiesto o se avete bisogno di immagini, fatecelo sapere.
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I am not certain what you are asking. The H920 and the H920+ are not the same for GPS connection.
On the original H920, the GPS plugs into the IMU Module. The cable from the IMU module carries both IMU and GPS to the Flight Control Module.
If this is not what you asked, or if you need pictures, please let us know.
Ma mi sono spiegato male scusatemi ..non attacco nel cpu ma non ricordo come stava inserito nel porta gps allinterno della cover .Grazie in Anticipo
Ci vorranno alcuni minuti per togliere la parte superiore e scattare alcune foto.
It will take a few minutes to take the top off and get some pictures.
Scusate la mia ignoranza ...ma sul h 920 non plus oltre al fco,imu va sempre collegato il gps? e se è si il gps sempre sul fco o nel Imu nell'entrata aux 1.. aux 2 dell'imu? Grazie
Translation by moderator:
Pardon my ignorance ...but on the h 920 non plus in addition to the fco,imu should the gps always be connected? and if so is the gps always on the fco or in the imu in the aux 1. aux 2 input of the imu? Thanks
Translation by moderator:
Pardon my ignorance ...but on the h 920 non plus in addition to the fco,imu should the gps always be connected? and if so is the gps always on the fco or in the imu in the aux 1. aux 2 input of the imu? Thanks
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è ciò che volevo sapere .........qualche immagine mi farebbe tranquillizzare nell'istallazione dato che sto tremando per lo smontaggio.......come sempre disponibile. Grazie
Translation by Moderator:
is what I wanted to know .........some pictures would ease me into the installation since I'm shaking about disassembly.......as always available. Thanks
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Prima di poter smontare un H920 per scattare delle foto sarà necessario attendere fino a tarda sera. Questo H920Plus era probabilmente un H920 originale che è stato aggiornato a H920Plus. Farò del mio meglio per includere le parti relative all'H920 originale e installate in quella che credo fosse la configurazione originale, ma non ho modo di garantire che siano corrette. Questo drone funziona bene come H920Plus. Non funziona con i componenti dell'H920 installati.
it will be late in the evening before I can dissassemble an H920 to take pictures. This H920Plus was probably an original H920 that was upgraded to H920Plus. I will do my best to include the parts related to the original H920 and installed in what I believe was the original configuration, but I have no way of guaranteeing that they are correct. This drone works fine as the H920Plus. It will not work with the H920 components installed.
Ho inviato un PM con il disegno. Il disegno contiene informazioni che non possono essere convalidate.
Se qualcuno ha immagini di collegamento di un H920 funzionante, sarebbe utile sia a @giorgio che a me.
I sent a PM with the drawing. The drawing contains information that cannot be validated.
If anyone has connection pictures from a working H920, it would be beneficial to both @giorgio and myself.
Se qualcuno ha immagini di collegamento di un H920 funzionante, sarebbe utile sia a @giorgio che a me.
I sent a PM with the drawing. The drawing contains information that cannot be validated.
If anyone has connection pictures from a working H920, it would be beneficial to both @giorgio and myself.
inserito il nuovo fco il gps aux 2 il led posteriore lampeggia di diversi colori ,inclianato a 45 gradi nessuna connessione ne st 16, st 24 e non emette ne anche il bip dei esc ...grazie
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con il vecchio fco senza imu si collega con st 16,st24, e emette il bip degli esc...ma non prendono i satelliti ne anche acceso per 30 minuti più ,e i motori non partono .... non so piu cosa fare Grazie
