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corrize
corrize
Badcaps Veteran
Last Activity: 11-01-2024, 11:52 AM
Joined: 04-05-2021
Location: Paris
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  • corrize
    replied to What is this component ? smd double diode like, marking code : RX
    in General Electronics Technical Discussion
    [FONT=Calibri]Mosfet is a good idea. That explain all the measurements « open ».[/FONT]
    [FONT=Calibri]In the previous photo, RX component and 2 resistors indeed are missing because destroyed by rust (see photo before cleaning, the resistor on top has same value the one beside : 1MOhms).

    [FONT=Arial][COLOR=gainsboro]You found it. RZM001P02T2L[/COLOR][/FONT] match 100% indeed. Probably I would never found it, thanks. I will order it and replace.[/FONT]
    ​    [FONT=Calibri]Mosfet is a good idea. That explain all the measurements « open ».[/FONT]
    [FONT=Calibri]In the previous...
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  • corrize
    started a topic How to clean fpc connectors oxydated ?
    in Equipment Usage, Soldering, Techniques, and Reviews

    How to clean fpc connectors oxydated ?

    [FONT=Calibri]Hello, do you know if it is possible to clean oxydated fpc connectors until it back brilliant please ?[/FONT]
    [FONT=Calibri]I know the best is to replace, but sometime micro fpc are very little oxydated and very hard (or unable) to find as new. So, there is may be a chemical product for that ?[/FONT]
    [FONT=Calibri]I use vinegar for rust on metal screw or little metal pieces and I finish with WD-40 for protect, else the rust can come back. That works pretty good.[/FONT]
    [FONT=Calibri]I not yet tryed on connector. Do you have a good method please ?[/FONT]
    ​    [FONT=Calibri]Hello,...
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  • corrize
    replied to What is this component ? smd double diode like, marking code : RX
    in General Electronics Technical Discussion
    [FONT=Calibri]Thanks for reply, the original RX is lost, but I found 2 other « RX » side by side on the board (see pictures)[/FONT]
    [FONT=Calibri]I measured in circuit, in diode mode and resistance mode (see schematics) but the result is not obvious for me ? I guess it is not a zener, and not a diodes, maybe not a transistor because I cant see clearly a « diode ».[/FONT]
    [FONT=Calibri]I noticed no pin is ground, and I noticed the 2 pins at same sides are linked to same pin to other (see picture).[/FONT]
    [FONT=Calibri]The board is dead, so the components can be defectives.[/FONT]    ...
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  • corrize
    replied to What is this component ? smd double diode like, marking code : RX
    in General Electronics Technical Discussion
    Thanks for reply. See the area around. In the largest picture, the RX component is missing, you can see 3 pads only. There is a parallele configuration, so the component beside could have the same function (It is a camera DLSR board).
    I saw the list of "RX", and I noticed thic component could be a LM4050, maybe ? only because it is a common component, and because in the board that could be a power controleur-regulator, and because that could be in comparison configuration, but.... I guess, it is a general idea, nothing precise ?

    ​...
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  • corrize
    started a topic What is this component ? smd double diode like, marking code : RX
    in General Electronics Technical Discussion

    What is this component ? smd double diode like, marking code : RX

    Hello, do you know what it is this component marked RX please ? I can't find it. Probably it is a part of serie, because I saw another marked RW....
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  • corrize
    replied to Where to find a very small fpc connector 0.3mm between 2 pins ?
    in General Electronics Technical Discussion
    [FONT=Calibri]Indeed if you mesure between 2 alternate pins on connector, you found : 0.15mm. And when you mesure between 2 tracks on the ribbon cable, it is the same : 0.15mm.[/FONT]
    [FONT=Calibri]The key is this number : 0.15mm. But it is very difficult to find. On Digikey or Mouser website, when you search fpc connectors, it show « 0.20mm pitch or under » but in the list nothing under 0.20.[/FONT]
    ​    [FONT=Calibri]Indeed if you mesure between 2 alternate pins on connector, you found : 0.15mm. And when you mesure between 2 tracks on the ribbon cable, it is the same : 0.15mm.[/FONT]
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  • corrize
    replied to Where to find a very small fpc connector 0.3mm between 2 pins ?
    in General Electronics Technical Discussion
    [B][FONT=Cambria][COLOR=#4f81bd][FONT=Calibri]Yes this one : (he sent a 0.6mm between 2 pins)
    [URL]https://fr.aliexpress.com/item/1005005912426681.html[/URL][/FONT][/COLOR][/FONT][/B]


    [FONT=Calibri]And this one (he sent a 0.5mm between 2 pins, that is wrong compare the ad) :
    [URL]https://fr.aliexpress.com/item/1005006036502156.html[/URL][/FONT] [B][FONT=Cambria][COLOR=#4f81bd][FONT=Calibri]In fact, for 0.3mm between 2 pins, the specs must be « 0.15mm pitch »
    If you read : « 0.3mm pitch », that means there is 0.6mm between 2 pins.[/FONT][/COLOR][/FONT][/B]    ...
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    Last edited by corrize; 09-13-2024, 12:30 AM.

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  • corrize
    replied to Where to find a very small fpc connector 0.3mm between 2 pins ?
    in General Electronics Technical Discussion
    [B][B]Keep searching, can't find. How do you do for find your connectors please ? You buy new ones or take from boards for parts ?[/B][/B]​[B][B]Keep searching, can't find. How do you do for find your connectors please ? You buy new ones or take from boards for parts ?[/B][/B]​
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  • corrize
    replied to Where to find a very small fpc connector 0.3mm between 2 pins ?
    in General Electronics Technical Discussion
    [B][FONT=Times New Roman][FONT=Arial][COLOR=gainsboro]Update : found one connector in commercial ad, after searching with « 0.15mm ». [/COLOR][/FONT][/FONT][/B]

    [B][FONT=Times New Roman][FONT=Arial][COLOR=gainsboro]It seems the distance between 2 pins is linked with pin width. So for 0.3mm distance : 0.15mm. The key number seems 0.15mm for find this connector... but I didnt found where to buy.[/COLOR][/FONT][/FONT][/B]

    ​    [B][FONT=Times New Roman][FONT=Arial][COLOR=gainsboro]Update : found one connector in commercial ad, after searching with « 0.15mm ». [/COLOR][/FONT][/FONT][/B]
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  • corrize
    started a topic Where to find a very small fpc connector 0.3mm between 2 pins ?
    in General Electronics Technical Discussion

    Where to find a very small fpc connector 0.3mm between 2 pins ?

    [B][FONT=Times New Roman][FONT=Arial][COLOR=gainsboro]Hello, I search this connector (oxydated).
    It's a fpc zif low profile connector. It come from camera sensor, it is very small : 0.3mm between 2 pins.
    I ordered 2 from Aliexpress called « 0.3mm pitch » but one was 0.5mm between 2 pins and the other 0.6mm. In fact « 0.3mm pitch » seams to be the pad width and not the distance between 2 pins.
    I can't find it. The other websites like mouser dont show the datasheet, and I can't check if it is 0.3mm between 2 pins ?[/COLOR][/FONT][/FONT][/B]

    [B][FONT=Times New Roman][FONT=Arial][COLOR=gainsboro]Do    ...
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  • corrize
    replied to Soldering plastic low profile FPC close camera CMOS sensor ?
    in Equipment Usage, Soldering, Techniques, and Reviews
    [FONT=Calibri]Thanks for reply. I'm still waiting connector, not yet delivered.
    I will probably cover the sensor, but I don't want isolate all the board except connectors, because that could create a hot spot around connector and cold spot on board under kapton. I prefer rising slowly the temp to 200 degree on all board, and then increase temp on connector.[/FONT]
    [FONT=Calibri]I cant reach the connector pins with solder iron, because there is no pins, the connector has only pads fully under. The « pins » you see on picture is just solder on pads of the board, because pads are longer.[/FONT]    ...
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  • corrize
    started a topic Soldering plastic low profile FPC close camera CMOS sensor ?
    in Equipment Usage, Soldering, Techniques, and Reviews

    Soldering plastic low profile FPC close camera CMOS sensor ?

    [FONT=Calibri]Hello, I will have to solder a very small FPC connector (pins : 0.3mm), on the pcb of CMOS sensor, it is very close. I was surprised by movie on ytb, someone soldering directly with hot air directly on the sensor without kapton, nothing.
    CMOS sensor seems resist to high temps.
    But I also directly saw sensor broken because a blocked motor at the corner became very hot and probably bent the metal frame and cracked the sensor.[/FONT]


    [FONT=Calibri]I have low melting point solder.
    I will probably test hot air directly on one of plastic connector    ...
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  • corrize
    started a topic What are the 2 or 3 most used BGA balls sizes please ?
    in Equipment Usage, Soldering, Techniques, and Reviews

    What are the 2 or 3 most used BGA balls sizes please ?

    [FONT=Calibri]Hello, I want to buy BGA balls (not stencils, only balls) but I don't know what size, it's just for reballing the new chip balled if the first attempt fail. So I will rarely use it. Probably chips are PMIC with max 60 balls. I don't need to reball EC chips from laptops of big chips like that.[/FONT]
    [FONT=Calibri]So what are the 2 or 3 most used BGA balls sizes I should have for cover the jobs please ?[/FONT]​    [FONT=Calibri]Hello, I want to buy BGA balls (not stencils, only balls) but I don't know what size, it's just for reballing the new chip balled if the first attempt fail.
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  • corrize
    replied to How to diagnose little step down and power management BGA chips never shorted
    in General Electronics Technical Discussion
    [FONT=Calibri]Here it's a simple board, DC-DC down convertor so the chip is easy to find as guilty in this case because the other components are easy to check, but this chip is never shorted. I have this one, and in 4 or 5 dead boards : no short. Even if the chip is physicaly broken. It's harder/not possible to diagnose when that sort of chip is on other big board.[/FONT]
    [FONT=Calibri]The most of the time, I can't diagnose with power on because the boards are inside box with cables. Sometime, I diagnose like this : if no voltages out of this chip and no short, so chip dead... Because I    ...
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  • corrize
    started a topic How to diagnose little step down and power management BGA chips never shorted
    in General Electronics Technical Discussion

    How to diagnose little step down and power management BGA chips never shorted

    [FONT=Calibri]Hello,[/FONT]
    [FONT=Calibri]I have different sort of those little BGA chips (step down DC-DC, power management battery, …) I replaced 10 on differents mobile devices (no schematics) but I noticed often they can be dead but never shorted. I see some signs : burn marks, resistance drop by comparison with good board (40 KOhms to 1 KOhms for example)… but not easy to be sure of the diagnose. Because I can't access on all tracks (balls) with the meter.
    Sometime, I know only after replacing chips.[/FONT]
    [FONT=Calibri]Do you have tips for diagnose please ?[/FONT]    ...
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  • corrize
    replied to What is this bga chip in all Nikon camera ? – power management
    in General Electronics Technical Discussion
    Wow !

    [url]https://fr.aliexpress.com/item/1005006929352658.html[/url]https://Wow !<br /> <br /> [url]http...658.html[/url]
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  • corrize
    replied to What is this bga chip in all Nikon camera ? – power management
    in General Electronics Technical Discussion
    [FONT=Calibri]Who buy on Alibaba ? Indeed, some « shops » had this ship, but I saw it only on the title, no information at all. Nothing. I can't check if it this one. BGA chip ?
    I guess those shops are only traders, they receive demands and they send offers to sellers.
    I guess they have nothing.
    I will ask if they have other way to buy their products like Aliexpress, Ebay or other. I need to see what I buy.
    I will try…[/FONT]
    ​    [FONT=Calibri]Who buy on Alibaba ? Indeed, some « shops » had this ship, but I saw it only on the title, no information at all. Nothing.
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  • corrize
    replied to What is this bga chip in all Nikon camera ? – power management
    in General Electronics Technical Discussion
    [FONT=Calibri]OK, probably the right list, there is 2 match :[/FONT]
    [FONT=Calibri]R2A23251BM for 23251 chip
    R2A23250BM for 23250 chip[/FONT]
    [FONT=Calibri]But no information, no datasheet… « specialized »[/FONT]
    [FONT=Calibri]I already searched for those components some years ago, and found the sames.[/FONT]
    [FONT=Calibri]Thoses chips are the keys for easily repair camera motherboards and power boards, but can't be found. The Z6 model was built in 2018, not old.
    Thanks for help.[/FONT]
    ​    [FONT=Calibri]OK, probably the right list, there is 2 match :[/FONT]
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  • corrize
    replied to What is this bga chip in all Nikon camera ? – power management
    in General Electronics Technical Discussion
    That could be a good way, found this [B]DA9210 Renesas chip, quite similar... But not the same, just visualy similar.[/B]That could be a good way, found this [B]DA9210 Renesas chip, quite similar... But not the same, just visualy similar.[/B]
    1 Photo
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  • corrize
    replied to What is this bga chip in all Nikon camera ? – power management
    in General Electronics Technical Discussion
    [FONT=Calibri]Thanks for help, I have D750, but thoses chips are in lot of models as you can see. I looked in the links but nothing. There is no electronics data in the services manuals. I only saw a boardview in D700 service manual but only a picture, no informations on components.
    I have services manuals and parts list for D750 but it's only for mechanic parts, not for electronics.[/FONT]
    [FONT=Calibri]I guess the information about thoses chips can't come from Nikon. Maybe someone can recognize the brand by the box ? And balls layout ? (Like picture)[/FONT]
    [FONT=Calibri]Chip    ...
    1 Photo
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