Импульсный свет в фотографии

Hello, This huge Canon flash has a common defect: disabling wireless radio due to power PCB problem. My impression is the overall quality of the unit is not worth the price. It is made in Myanmar, due to higher labor cost in China recently. The flash interior is not so advanced, plastic molding qual...

Yes, UCC27511 could be the culprit as well as other trigger components too, I need to check closely. When compared to excellent Canon 600EX 1 and 2 series, I do not like the IGBT placement (in the head like 580ex 1) and supporting circuit approach on this poor flash. Actually I do not like anything ...

Yes, the wiring between the reflector and electrode is present, I meant in my question, if the circuit design was bad, because it is not normal to have the same IGBT shorting in a lot of flashes just used for a short while. I already know from the first time the SB-5000 is a not so good unit, but I ...

Hello friends, I am getting a lot of SB-5000 crap flashes suffering IGBT failure recently. I have some genuine RJP5001's in hand ready, so when I just replace the IGBTs, all will be fine but... I have three questions: 1- What do you think makes the IGBT go bad on a lot of SB-5000 flashes? I think th...

https://impulsite.ru/ctlg/pentax/af540fgz-2/view-front-back_.jpg This newer flash is manufactured by the same company which also makes FujiFilm X-500 and Olympus/Panasonic FL-R600. I got this with the "Low Battery" problem which turns off the flash within 10 seconds and indicated on the LCD "LO BAT...

If it turns off in 1 second, IC304 is bad.
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Если вспышка выключается через 1 секунду, то неисправна IC304.

Thank you impulsite, I have checked the parts and took some components mostly from a dead 580ex2 board. Only the coil comes from a 600ex board. Especially see how I soldered the FET with 6 legs in place of 3. -- Спасибо impulsite, я проверил детали и взял некоторые компоненты в основном с неисправно...

Thank you for your explanation! What could cause this burn out? It worked for 10-15 seconds then burned. Do you think that the missing Capacitor may have caused this? -- Благодарю вас за пояснение! Что могло привести к выгоранию? Вспышка работала в течение 10-15 секунд, а затем сгорела. Как вы думае...

I wonder what the burned transistor is, looks like Y41V 12? I will post all pictures soon, here are the high res images from two angles: High Res: -- Интересно, какой это транзистор сгорел, который выглядит как Y41V 12? Я выложу все фотографии в ближайшее время, ниже изображения высоком разрешении с...

Privet, I have got this flash with a broken foot assembly, all looked fine except the large capacitor on the main PCB (CY2-1113-000). Without the main capacitor (I did not pay attention that it was missing) after I inserted the batteries and turned on, within 10-15 seconds a burning smell start to c...

Yes, EL is on in the menu, it's the first thing I check normally. When I replace the Q11 (Panasonic 40v NPN) it worked for a couple minutes and after a power recycle (turning the flash off and on) it stopped again. There is no 40V AC coming out of the transformer which is normally fine. Weird proble...

After resting the unit for a couple days, it works normally now. :lol: I suspect there was a residual current or static kept the CPU (which is very delicate) to function abnormally. -- Отдохнув пару дней, вспышка теперь работает нормально. :lol: Я подозреваю, что был остаточный ток или статика мешал...

Privet impulsite, My oscilloscope is broken now. Until I replace, I use the old method: which is replacing the main parts (PCBs, foot, head and etc) with a known good working unit and find the problem location in general. It saves time and make repairs more quickly. For example, I can say that the p...

Thank you, cables are tested... OK. I have measured the values of the components underside of the power PCB, they are fine. Now the only culprit is on the transformer side of the board, I suspect some power transistors... still looking :) -- Спасибо... провода проверены, в порядке. Я измерил величин...

Privet, I have got another broken SB-900. On the power pcb, IGBT and SCR are tested to be fine. Head section is good too (lamp, trigger, capacitor). When pilot is pressed, a faint click sound is heard (no flash ignition) on the power pcb. I have not checked other components yet. What would you look ...

I just got a unit with a broken foot form the screw holes. The male connector on the pcb was ripped off too. Visually PCB looks fine, solder joints are in place and no visible broken components. I soldered the connector and connected the foot. When turned on it show -->M to move to M mode, no TTL. I...

Yes they are the same, but please note that ZOOM connectors on the main PCB is different. If you swap the heads, the zoom will give an 'Err'. Wire order is not the same. My question: I have a 48 and 50 AF-1 units. The 22ohm resistors on the head PCB were burned and replaced. Now, they flash, but the...

Privet, I have started working on 3 Olympus and 1 Panasonic unit. Repaired two so far, the other two are waiting. As you know the flashes are identical with some minor outer casing design exceptions. They are really small but capable units. Battery doors and the battery case are very fragile. I will...

It was doing the same with the old lamp which looked flawless. The new lamp I swapped is for SB-400. What are the voltages for low and high voltage lamps and how can we identify visually? -- То же самое было и со старой лампой, которая выглядела безупречно. Новую лампу я заимствовал из SB-400. Каков...

You're welcome. I will upload the foot picture too. About the ignition, the lamp and trigger transformer has been changed, wires are fine. It fails to flash in M mode too. There is inconsistency like a symptom of a depressurized or cracked lamp but it's fine as I mentioned. -- Пожалуйста. Я также за...

It looks like Renesas IGBT array is on the head PCB. Here are the pictures, I hope they help the community here. -- Похоже, линейка IGBT от Renesas на плате в головке. Вот фотографии, я надеюсь, что они помогут местному сообществу. http://www.filedropper.com/di622inner https://impulsite.ru/ctlg/niss...

Privet! I have a Nikon Di622 II for Nikon. It does flash sometimes full power, sometimes very weak, and most times no flash. I have changed the lamp and the trigger transformer which are good. I think I need to find the IGBT and SCR, do you know where are they located? Thanks! -- Привет! У меня Niko...

Privet,
If the IGBT is tested and seems good, but no flash fire. What would you look at next? Where is the SCR?
Thanks.
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Привет,
Если IGBT проверен и, кажется, исправен, но вспышка не поджигается. Что бы вы проверили дальше? Где SCR?
Спасибо.

Privet, I have a SB-400 which has a faulty top board. The flash flashes normally however after 2-3 minutes, it starts to discharge by itself non-stop. I suspect one of the HEX chips (Toshiba VHC) is bad. Would you have any idea on this? Thanks. --- Привет, У меня есть SB-400, которая имеет неисправн...

IGBT failure is very common on this and its Sunpak version.
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Отказы IGBT очень часты на этой вспышке и её версии Sunpak.