In detail: do-it-yourself Canon camera repair from a real master for the site my.housecope.com.
When you ask Google how to fix your long-suffering camera yourself, smart Google somehow does not really advise doing this.
Most often, there are tips not to repair cameras yourself, but to give them to people with special knowledge and skills. Otherwise, you can be so refurbished that then no reanimation measures will help.
However, we are after all interested to see what is inside - all of a sudden some wiring is sealed off or a lot of dust has collected. Then, after wiping off the dust, we can be very proud that we have repaired the camera ourselves!
However, in all fairness, it should be noted that repairing a camera is not an easy task and takes a lot of time and mental strength.
Google is right in many ways. Modern cameras are such that it's a big problem not only to fix it, but also to correctly disassemble it. What and in what order to unscrew, not everyone can understand. And especially nervous people can pick up a hammer.
However, if a person from childhood likes to engage in radio engineering and went to the "Skillful pens" circle, then the likelihood that the camera will be able to take a couple of pictures increases. But here, in addition to talent, you also need to be able to take risks and have one more camera in stock, just in case. Well, actually, all of us are driven, as I have already noted above, a desire familiar from childhood - “And what's inside. "
Another important detail should be noted. The cost of repairing a digital camera is often the same as the cost of the camera itself. And a person is faced with a choice whether to repair a broken apparatus or buy a new one. And at the same time dig deeper into the insides of the first.
Video (click to play). |
What if it turns out to be repaired! This is what moral satisfaction you can get!
So, the choice is yours - take the camera for repair or buy a new one. Or repair complex digital equipment yourself and get previously unexplored moral satisfaction and pride in yourself.
In the first approximation, any digital camera consists of the following main parts and assemblies: Lens and diaphragm, a set of optical converters and mirrors and a digital matrix, a control and data storage unit.
The principle of operation of the camera is well understood from the block diagram in the figure below:
If you look at the picture above, you can clearly see that first the light flux enters the lens, then follows through the diaphragm and shutter, which dose the amount of light that hits the photosensitive elements of the matrix. Each pixel of the matrix transmits information about the intensity of the luminous flux and the light spectrum. Further, this information goes to the analog-to-digital converter. From the ADC output, the digital code through the processing unit is displayed on a digital display or saved to internal or external memory.
Service manuals for digital cameras Casio EX-P600 EX-S1 / M1, EX-S2 / M2, EX-S3, QV-3EX, EX-S770, EX-S770D, QV-100B, QV-100C, QV-4000 and on other models
FUJIFILM FINEPIX 30I, 4800 ZOOM, 4900, 50I, 6800, 6900, etc.
Digital photographic equipment BBK in the selection with manuals you will find information on disassembly, a catalog of spare parts for BBK DP710, DP810, DP830, DP850, DP1050, DP1250, etc.
Detailed service manual for LG LDC-A310 digital camera.
An article on protecting digital cameras during use, and LG GR-DV 4000 description of a malfunction with a DC / DC converter
In addition to collections with service documentation, we analyzed typical malfunctions and ways to eliminate them in Minolta cameras.
JVC GC-QX3U, JVC GC-X1E-S, JVC GC-X3E-DS, JVC GF-500EG, JVC GR-AX200EA, GR-AX210, GR-AX350, AX400EA, AX48EG, AX68EG and many other models
Repair of Olympus digital cameras associated with disassembling the camera or replacing the firmware, in order to avoid unnecessary damage, you must start with familiarizing yourself with the necessary service manual and the device for a specific camera model, which you can download from us.
A huge selection of Nikon digital photo service manuals, here is not a complete list of available technical information Nicon Coolpix 700 sm, 800, 885, 950, 3000, 3100, 3500, 4500, 5000, 5200, 7900, 8400, 9000, L1 - L20, P1 -P6000, S1-S550, D40, D50, D60, D70, D80, D200, D300, f1 - f90x, N50, N90
Sigma Nikon AF 70-300mm f4-5.6 D Macro Repair Manual
To make a good repair of your digital camera, you first need to clearly understand the structure of the camera. To begin with, you should understand that any photographic technique is first of all optics, and only then electronics.
Camera device short course of a young repairman: There is a membrane and a shutter inside the lens. The membrane consists of several petals and, when closed, reduces the caliber of the hole through which the light goes to the matrix. Due to this, the amount of incident light is miniaturized and excessive illumination of the matrix is prevented when the subject is clearly illuminated.
Next is a photosensitive matrix, the upper shot of which is made of glass. The photosensitive plane of the matrix is located in front of the protective glass. Structurally, it consists of a large number of light-sensitive cells. Light falling on them produces a galvanic charge. After the shooting is completed, the charges that have arisen are transferred to the analog-to-digital converter. This is where digitization comes in. The digitized information is transferred to the RAM. RAM stores information only when it is on. The picture is located in RAM for only microseconds. It is also digitally processed - the color rendering, sharpness, saturation and other properties of the image are improved. ... The processed image is transferred to the memory card. Here the digital photo can be stored for a long time.
The main problem that arises with digital flash drives is due to contamination of the contacts. To eliminate this problem, you just need to rinse the contacts with gas alcohol, for example.
If the digicam does not turn on, check that the batteries are connected correctly and their charge level at least with a conventional tester. The current in the batteries should not be less than 1 ampere, at lower values the camera runs the risk of not even turning on
The main microcontroller controls the digital camera... A visual viewfinder is located above the lens. During zooming, the distance between the lens elements changes. If there are no problems with the batteries and the fotik still does not cut in, check if power is supplied to the main microcontroller (processor), if everything is OK, you need to change it. Do not rush to open the camera without having disassembly instructions at hand, otherwise you risk damaging the mounting elements. You can download a large number of service instructions from the site https://my.housecope.com/wp-content/uploads/ext/3558
The flash unit is located on a separate board with a huge capacitor and a transformer. An LCD monitor is located on the back of the camera.
Some Common Problems and Solutions for Digital Cameras
Defective optical sensor in the lens of a digital camera or video camera: An optocoupler consists of 2 parts - a radiation source (IR LED) and a photodetector (eg photodiode, phototransistor, photothyristor). You can determine the part of the light emitter, as well as the anode and cathode of the LED, using a conventional tester. Accordingly, opposite the light emitter terminals - the photodetector terminals and, as a rule, opposite the light emitter anode terminal - the photodetector anode or collector, opposite the light emitter cathode - the photodetector cathode or emitter. Optocouplers in cameras are used in the zoom lens mechanism. When a voltage is applied to the emitter and an open light flux, the photodetector is open and the voltage at its anode or collector is zero, when the photodetector is closed, the voltage is equal to the power source.If it is not possible to check the optocoupler directly in the camera, the operability can be checked according to the following diagram.Repair of lenses in digital cameras
A lens in a digital camera is a complex optical-mechanical device that combines elements of precision mechanics and optics. In cameras, it is most at risk of failure. Suffice it to say that about 70% of camera malfunctions are due to lens defect, and in the overwhelming case, the cause of malfunctions is the human factor, i.e. dropped, stepped on, spilled liquid, rough handling, foreign matter entering the lens drive such as sand, etc. In Canon ixus xxx cameras, if a lens malfunction occurs, after turning on the camera, after a while, the message E18 or “lens error” appears on the display, after which the unit turns off ..
I hope it is clear that getting even the smallest grain of sand between the teeth of the lens zoom mechanism drive gear will cause it to jam, and minor mechanical impact will damage the teeth of the same gears or lens pins. in the event of a malfunction in the lens, when the mechanism drive cannot “drive in”. elimination algorithm if all parts are intact, carefully disassemble and clean, if necessary replace the failed parts. Sometimes it is easier to replace the entire lens, as some parts are simply impossible to find
Typical problems arising in the CF connector
Firstly, these are broken connector pins, secondly, they can be bent, and because of this, the memory card cannot be read. The appearance of a malfunction occurs due to improper installation of the flash drive. Symptoms of manifestation can be very diverse, for example: the digicam simply does not turn on, and most likely connector pins are closed, which triggers the protection of the camera. Due to closed contacts, complications can be more dangerous, for example, a voltage converter often crashes. Also, there were often cases when the camera works well without a memory card, but after its installation it does not turn on at all. The reason is also bent contact. The camera works, but does not detect the memory card. Most likely the reason is encrypted in the broken pin of the connector.
Repair of the flash in the camera
Attention, the voltage on the flash storage capacitor is about 300 volts, if handled carelessly, you can not only get an electric shock, but also easily irrevocably ditch the camera. Discharge the flash storage capacitor every time you turn on the power. The capacitor can be discharged through a 1-2kΩ resistor.
A digital camera without a flash is not very useful for work, and it makes no sense to use it in low light conditions. Therefore, the repair of cameras with such a malfunction, as a rule, does not raise questions among users. As for the practical side of the issue: often the repair process is complicated not so much by the lack of components, but by the lack of service documentation. Unfortunately, at present there is very little technical literature devoted to the device of photo flashes, a description of the principles of operation of their electronic circuits, despite the fact that there is great interest in the device of photo flashes and, moreover, in their repair, not only among the owners of cameras, but also , often, at workers in camera repair shops, especially in the provinces. Let's consider the operation of the flash according to the principle diagram of a film camera in Fig. 1.
The blocking circuit of the flash generator is assembled on the Q303 transistor. At the moment of turning on, the transistor is open with a negative voltage supplied through the resistor R305, the winding of the transformer T301, the open transistor Q304. As a result, a current flows through winding I of the transformer, which induces a pulse of positive polarity in winding II. It turns off transistor Q303.The current in the winding I begins to decrease. The disappearing magnetic field induces a pulse of negative polarity in winding II, which again leads to the opening of the transistor.
The process is repeated continuously. Pulses of different polarity induce current in the winding III of the transformer and, rectifying by diode D302, charge capacitors C303 to a voltage of 250 - 280 volts, C302 through resistors R308 R306. When the shutter button is pressed, the sync flash fires. A positive voltage is applied to the control electrode of the SR301 thyristor, opens it and closes the capacitor C302 to the case, causing its discharge and a sharp decrease in the current in the primary winding of the T302 transformer. The disappearing magnetic field induces a high-voltage pulse in the secondary winding, causing gas breakdown in the bulb of the XE301 flash lamp and, as a result, a bright short-term glow
Schematic diagram of the flash of a digital camera from Sony DSC - P52 The same diagram of the blocking generator Q503, T501, rectifier diode D502, storage capacitor C508. The role of the key on the SR301 thyristor is performed by the field-effect transistor Q506, etc.
Lens malfunction - this must be the most common failure of digital cameras. Some common error messages that may appear on the display of cameras with this issue include“E18 lens” (“E18 lens error” on older Canon models), “ACCESS” (access error) (Sony), “Zoom Error” (Fuji), “Lens Obstructed” (“lens problem”) (Kodak), “Lens> error, restart camera” or just “lens error” (almost all camera manufacturers use this option lately). Some cameras may not show anything at all on the display, but only beep, the lens moves in and the camera turns off. Sometimes the lens won't even extend.
The problem is actually quite common with all digital camera models. Usually it is sand or other small particles that get into the lens extension mechanism and autofocus mechanism. Or the camera was dropped with the lens extended. The camera may have been turned on, but the lens was prevented from extending (for example, it was accidentally turned on in the bag). It happens that after extending the lens, the batteries run out and the camera turns off with the extended lens. Believe it or not, one of the causes of lens malfunctions is the use of cases and purses. Sand, dirt, fibers, etc. accumulate at the bottom of the case. These materials like to cling to the camera body due to rubbing electrostatic charge (especially when the case is soft and fluffy). After these particles find their way into the lens mechanism and malfunction messages occur. I own a lot of Canon cameras and never use cases for this very reason.
For the owner of the camera with this problem, there may be no point in contacting the warranty workshop. Many camera manufacturers will not cover this issue under warranty. According to them, this is due to damage to the camera due to shock or sand or debris trapped in the lens extension mechanism (none of which are covered by the warranty). The cost of repairs is usually close to or more than what the camera actually costs. Since warranty workshops in most cases change a faulty lens for a new one, the cost of which is high as a spare part.
Fortunately, about half of the cameras that suffer from this trouble can be easily fixed by one of the following methods. None of these methods require disassembling the camera, although some can cause other damage if overdone and careless. If the camera is still under warranty, before applying any of these, please visit your camera manufacturer's warranty workshop to see if the repair will be covered under warranty, or to determine how much they will charge for paid repairs. Who knows, you might get lucky. But if they list an amount that is higher than the value of your camera, you may want to consider the following methods. Here is a video description of each of the troubleshooting methods, followed by a detailed description of them.
The methods are listed in order of risk of damage to your camera. Therefore, you should try them in the order shown. And remember that these methods (in particular, No. 6 and 7) should be considered only for cameras for which the warranty period has expired, the indicated repair cost would be excessive. If these methods did not lead to the correction of the error, it is possible to contact a paid service, the cost of repair in which is lower than in the warranty.
Method 1: Remove the batteries from the camera, wait a few minutes. Insert a fresh set of batteries (preferably rechargeable NiMH 2500 mAh or higher) and turn on the camera. If you have been using batteries for more than a year, consider purchasing new batteries as they may not provide enough power to start the camera.
Method 1a: If new batteries do not work, try pressing and holding the Menu, Function, Set, or OK button while turning on the camera. This, along with Method 1 and # 2, sometimes works to correct lens errors that occur due to low battery power when the lens is extended.
Method 1b: For those of you who were able to access the camera menu with this error, try locating and selecting “reset” to reset the camera to its original position. On some Canon cameras, this requires holding the menu button with the power button for up to 10 seconds. Note, however, that a lens error may sometimes prevent the reset option and thus the parameter may not be displayed.
Method 2: If the camera's batteries are completely discharged while its lens was still open, the camera may show a lens error or not start correctly when new batteries are installed. Remove the memory card and do not insert it into the camera, then install new batteries. When you turn on the camera without a card, it may come back to life as it causes a reset in some models. Error E30 (for old Canon) means that you have no card installed, so you should turn off the camera, insert the card and turn it on again.
Method 3: Insert its audio / video (AV) cable into the camera and turn on the camera. Connecting the cable ensures that the camera's LCD remains off while the process begins. Thus, additional battery power will be available to the camera lens motor during startup. This extra power can be helpful in bridging dust or sand that can interfere with the lens. If the AV cable does not correct the lens error on its own, I consider keeping that cable installed on the line when trying to fix 4, 5, and 7 as a means to provide extra power to help with those attempts. But please note that I do not recommend keeping the cable installed during the Fix 6 process as this may damage the AV port when trying to turn on the camera.
Method 4: Place the camera on its back on a table with the lens pointing towards the ceiling. Press and hold the shutter button and at the same time press the power button. The idea is that the camera will try to autofocus while the lens is being extended. Hopefully while the lens extends and the autofocus lens moves, the guide pins will sit in place.
Method 5: Use a rubber blower to blow out the gaps between the lens cups with compressed air. The idea is to blow out sand or other debris stuck in the lens mechanism. Other options for blowing out are using a hair dryer in cold mode or sucking air out of the lens gaps (be careful with this!). Some people use a vacuum cleaner for this.
We are now entering the area of potentially dangerous camera rescue methods. There is certainly some risk, so be careful when doing the following:
Method 5a: If you actually notice sand particles in the cavity around the lens barrel and the airflow does not help knock them out, consider using tissue paper or a sewing needle to help remove them. Take special care not to scratch the lens barrel with the needle. Also, I do not recommend going too deep around the lens barrel with paper (do not go deeper than 1 cm). I especially do not recommend deep probing around the outermost (largest) part of the lens barrel, as you can knock out the anti-dust pad that sits just inside this gap.
Method 6: Hit the rubber USB cover repeatedly with the intention of knocking out any particles that might be obstructing the lens. It is also possible to tap the camera body with the palm of your hand. Many people report the success of this method. However, there are also some obvious possibilities of damage or displacement of internal components using this method, such as loose cables from connectors, or cracked LCD screens.
Method 6a: This is a variation of Method 6 and is applicable if the lens barrels are straight (not bent by impact). In other words, try this if there is no obvious mechanical damage to the barrels that is causing the problem. With the lens facing down, try to “gently” tap the lens from all sides with a small object such as a pen or pencil. The idea is to try to knock out sand particles that might interfere with the movement of the lens frames. Try turning the camera on and off at the same time while you are doing this.
Method 7a: Note that this correction method is intended only for cameras whose lens extends, then stops, passing part of the way, and then returns to its original position. Try to grab and hold the smallest front lens barrel at its most extended position, preventing the lens from returning. Inspect and clean the area around the lens cups from dust and sand. Turn the camera off and on again. If the lens extends further, grab the front glass again to prevent it from coming back. Repeat cleaning again. Turn the camera off and on again to see if the problem has gone away.
Method 7b: The most extreme fix. Just keep in mind that this is absolutely the last method before discarding your camera, and there is obvious potential for further damage to the camera with this method. You may want to consider this technique if the lens is visibly and clearly damaged, bent, or distorted, such as from dropping. In this case, try thinking of the lens as a dislocated shoulder. Try forcing the lens to straighten and snap back into place. In this case, the pins of the lens cups will be in their guides. Your goal is to try to transplant them by straightening the lens. Listen for a “click” confirming that the pins have jumped into the guides, and immediately stop further efforts at this point. More and more people are reporting the success of this method compared to any other method.
Variations on Method 7b: Gently pull, rotate, and / or twist the lens barrel while pressing the power button. Check the lens for any hint of tilt or unevenness. Again, the goal is to try to straighten or align the barrels if they are bent or kinked. Another option is to look for uneven gaps around the lens barrel and then push down on the side of the lens barrel that has the largest clearance (note that pushing the lens barrel all the way in is not recommended as it may get stuck there). Again, with all of the above, you should listen to the "click", which means the pins of the glasses hit the guide grooves.If you hear this sound, stop immediately and try turning on the camera.
At least once in our life, each of us breaks down a complex digital technique. So my family camera Canon A 460 has failed, and as always, at the most inopportune moment. The camera, of course, is not new, it was bought in 2008. All this time he served faithfully, never let down. Of course, it is outdated morally. Modern point-and-shoot cameras boast tens of megapixels and multiple optical zoom. But Canon A 460 suits me perfectly, takes good pictures, is able to perform acceptable macro photography.
In general, the malfunction manifested itself at one point, the photos began to turn out very white, as if canon a 460 flashing photo... And what is characteristic, horizontal stripes are visible. Here are some bad photos:
But the video was filmed, as before, without changes. I immediately noticed that at the moment the shutter button was pressed, there was no characteristic sound of the shutter curtains.
If you are faced with a similar malfunction, do not be upset, most likely it is to blame shutter train... We'll have to replace it with a new one - this is a typical malfunction. Although, to be honest, this activity is not for the faint of heart.
To get to the bowels of the lens, you need to disassemble the entire camera, which has small parts. In addition, we are dealing with optics that do not like dust. Therefore, you have to acquire patience and self-control.
Of course, you can buy a new lens and replace it entirely. But I could not find it cheaper than 800 rubles, although the shutter train is not so cheap, around 160 rubles. In general, I decided to replace the cable. I photographed the procedure for disassembling the camera on my phone, I apologize for the quality of the photos.
First, let's take out two AA batteries. Then we take out a three-volt battery, which is responsible for memory. We unscrew 5 bolts and do not forget about the sixth one, which is located under the protective plug of the USB connector:
Immediately after the cover is removed and access to the main board appears, you need to discharge the flash capacitor.
To discharge the capacitor, we use a low-power load, for example, a light bulb that we unscrew from the refrigerator:
Then we unsolder the wires to separate the board from the case:
We will carry out further disassembly of the Canon camera, based on the photographs that I found on the vastness of the worldwide network. True, I slightly simplified the disassembly, excluding the removal of the matrix, and also refused to dismantle the main tube from the lens.
The new shutter train looks like this:
We assemble the camera in the reverse order and preferably on the same day, so as not to forget anything. When assembling the lens, I would like to draw your attention to the moment when we will attach the optical video finder. It consists of four lenses, two of which are movable and they must move synchronously with the retractable tube.
It will not be possible to simply screw the video finder into place, because the movable lenses are in the initial position and are held by springs, so the lenses do not fall into the guide grooves on the tube. How can we get out of this difficult situation.
Some experts advise extending the lens. I did it easier. I just removed the metal cover from the video finder, which is held on by the latches:
Then we try to put it in place, while simultaneously moving each movable lens, trying to get into the guide groove of the tube. After we succeed, close the lid:
Next, you should definitely make sure that the assembled lens is working properly. For this we will use one finger-type battery. By changing the polarity on the motor, we make sure that the lens moves out completely, moves without delay, we observe the closing of the protective shutters, we check the performance of the video finder:
If everything works fine, then I congratulate you, you have overcome the most difficult lens assembly operation. It remains to put the camera together.
This is how a broken camera shutter train looks like:
Hope this article helped with your DIY repair and you didn't have to look for a workshop to get your Canon A 460 repaired.
A very useful article, invaluable in the repair.
The process of obtaining a high-quality photograph initially required a lot of skill and experience. With the invention of digital cameras, a new era began in photography. Anyone can capture a moment in digital format and, if desired, transfer their work to paper or photo frame.
- First, the room must be practically sterile. Otherwise, a speck that gets on the matrix or internal lenses of the photo lens will spoil all your photographs.
- Secondly, it is desirable to have good illumination of the table surface on which the digital camera will be disassembled. You will be surprised how small screws hold the internal parts of the camera.
- The third condition is preliminary disassembly of the digital camera for troubleshooting, as a result of which a large number of small screws of various sizes and the parts of the lens with lenses and a photo matrix are stored in disassembled form until the purchase of the part instead of the faulty one.
The most important thing is to carefully remember the sequence in which you shoot the parts of the digital camera, because you will have to assemble them in the reverse order.
For ease of use, we recommend pre-magnetizing the screwdrivers.
The cost of disassembling and assembling such a camera in a service center is 1500 rubles. If you are a DIY and enjoy exploring the device of a digital camera, then the time and patience you spend will more than pay off with the awareness of the money saved and the experience gained. If you still doubt the availability of patience and proper skill, it is better to contact specialized service centers. To have a camera repaired in a service center means getting a high-quality repair, accompanied by warranty obligations. Indeed, in case of failure, the time and effort spent cannot be compensated for by colorful photographs taken with a refurbished digital camera.
I want to note right away that this is only an assumption, we did not carry out laboratory analyzes, we did not follow the manufacturing process.
Complete disassembly of the lens is required in order to troubleshoot the shutter mechanism.
Canon powershot camera repair s2is is not an easy task, the design and circuitry of the camera is rather complicated. For the production of repairs, knowledge and experience in repairing digital technology and precision mechanics is required. As for the high-quality repair of the shutter mechanism and diaphragm of this particular model of the camera, I can say with a greater degree of confidence: it is not forceful and a master of average skill, a master who has more than a dozen successful repairs behind him. Here I do not mean large service centers or workshops in which camera repair consists in replacing the assembly or board assembly, and in this case, the lens as a whole.
In our workshop, repairs are carried out at the component level, i.e. we directly replace the defective part, which significantly reduces the cost of repair.
Below we publish photos of the lens disassembly sequence without any special comments to them, we will note only a few points where you need to be more careful.We hope that this material will make the work of the masters easier, and for users more - to get to know their camera in detail, so to speak, a look from the inside.
White arrows - shutter EDG terminals, green arrow - diaphragm drive gear.
Marked with an arrow - a spring with a ball, they have a habit of getting lost.
With a thin screwdriver, press the technological hole in the focusing lens until it stops so that its pins fall into their guides.
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Helping lovers is fraught with the killing of the carcass. And I love carcasses more than amateurs The most serious malfunctions are created by amateurs when they try to fix them themselves.
Shl they say surgical operations are expensive, and poor people cannot pay, they suffer and still die.
I propose to jointly create instructions such as - transplant a kidney to a friend, bypass the aorta to the grandmother and remove the gallbladder with an improvised instrument
Yes, there are. It is a pleasure to help such people. I speak absolutely without sarcasm
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Canon PowerShot S2 IS is a fairly successful digital camera for its time with a good combination of functions and properties, in particular the lens. Just remember the 12x zoom, super macro mode and image stabilizer.
This model also has its own typical faults. The most common problem is a sticking lens shutter curtain. At the same time, there is no image through the lens, a dark screen with only service symbols.
With regular use of the camera, the malfunction will progress gradually. If the device has been lying for several weeks, a stable state of sticking occurs. After several attempts to turn it on and off, it can work normally, but after a pause in work for several hours, the malfunction will again remind of itself. This malfunction, typical for these cameras (more precisely, lenses), occurs quite often after 2 years of operation. Once it has arisen, it will remind of itself until radical measures are taken to eliminate it.
There are 3 ways to deal with a stuck shutter fault:
- Return to the workshop - they will rake from 100 to 250 US $, depending on the steepness of the workshop
- Try to temporarily restore functionality (if urgently needed) without disassembling the camera. Then, to eliminate the cause of the malfunction, use methods 1. or 3. Method may not work!
- For specialists with a head and hands - self-repair.
The cause of the malfunction is a stuck lens shutter that cannot open and allow the image to enter the CCD sensor. In Canon cameras, at least in PowerShot, the shutter curtains should run dry, without any lubrication whatsoever. Over time, they get grease from neighboring mechanical units, the friction of the shutter curtains increases so much that they stop opening (or much less often - close).
So, as the service manual for the Canon PowerShot S2 IS camera, at least for the period of repair, was absent in the Internet, and so that there were fewer “unnecessary” parts, they decided to photograph the disassembly.
Not so much time is taken by the elimination of the malfunction itself, as by disassembly and subsequent assembly. Have patience, as well as a small Phillips screwdriver such as a watch, it would be nice to have a set of watch screwdrivers, tweezers with thin, preferably curved tips, a knife (for opening a plastic case by wedging).
I think there is no point in reminding that accuracy is very important in the repair of such equipment and rush is categorically contraindicated. Be very careful with ribbon cables! It is advisable not to confuse the removed screws so that they are in place during assembly. In addition to the length, they also go with different steps - small under metal, large, respectively, screwed into plastic.
We remove the covers in the following sequence: back, side, front, top with a mode switch, remove the flash. Figures 1, 2 and 3 show the camera with the covers removed.
Removing the button contact panel (Figure 4)
Disconnect all interfering ribbon cables. Several ribbon cables have 2 holes at the ends. For them, you should pull out such cables from the connectors using tweezers with fine tips. Several connectors have latches - latches that must be unlocked before removing the cables. Otherwise, there is a risk of breaking the cable!
Next, remove the processor board (Figure 5) and the lens. It is attached to the chassis with 3 screws (circled in blue in Figure 5). This also unlocks the zoom limiter.
When removing the lens, do not lose the current-collecting spring (in Figure 6 it is marked “1”).
Next, disassembling the lens. Having unscrewed 2 screws, we disassemble the gearbox, take out and fold 3 gear wheels (Figure 8). Then unscrew the 3 lag screws (circled in blue in Figure 6). One of the screws is located under the ribbon cable. Next, carefully, with a turn, remove the outer part from the inner (Figure 9). In this case, it is advisable to manage to push the inner movable lens (1 in Figure 10) back to the outer lens of the objective. Otherwise, if it comes off the guide 3, the ball 2 will jump out under the pressure of the spring under it. Filling them back is not difficult, harder to find as they bounce far enough. Another well-known option is disassembly in a transparent plastic bag. This is how anyone likes it.
You should also take care that the bronze guide tip 1 is not lost (Figures 13 and 15). It only sticks to the bore with thick grease. Figures 12-17 show the inside of the lens in detail.
Finally, we got to the culprit of the repair - the diaphragm + shutter assembly (Figures 18-20). It must be removed by unsoldering the ribbon cable on the electromagnet (only 2 solders) and unscrewing the diaphragm drive stepper motor. Actually, the reason is that the grease from a heavily lubricated motor or gearbox gradually flows to the diaphragm and shutter. But to drive the diaphragm, a motor with a gearbox is used, and its torque is very significant, and the shutter is driven by an electromagnet, which converts the shutter to the opposite state with a short pulse. Therefore, the malfunction is reflected only on the shutter, although the lubricant gets into the diaphragm.
I do not advise disassembling this unit - the subsequent assembly took about 3 hours.
I recommend the following cleaning method: For cleaning, you need 96% ethyl alcohol as pure as possible (medical), drawn into a syringe of cubes 5 - 10. Water in the position of the electromagnet upward, wet the assembly below the electromagnet with alcohol, then carefully moving the shutter levers 1 and iris diaphragm 2 ( Figures 18 and 20), ensure that the oil is flushed out between the curtains. At this stage, without fanaticism - when there is a lot of liquid in the curtains, or there is none at all, they move completely freely, but if the liquid is just a little bit, they stick together, and it is easy to damage them with excessive effort! Rinsing took about 40 minutes.
I have not tried cleaning with unleaded refined gasoline, but, I suppose, perhaps, and even more effective. It is important that the liquid is free of impurities, evaporates without sediment. You can check it by dropping it on the glass and wait until it evaporates.
At the final stage of cleaning, blot the unit with a napkin and let it dry. Next, make sure that the shutter levers 1 and iris 2 are free to move (Figures 18 and 20).In case of jamming, repeat flushing. Then assemble in the reverse order described.
Just in case, the resistance of a working electromagnet of the shutter curtain drive is 35 Ohm.
For those who decide to disassemble the shutter assembly and iris diaphragm, see Figure 21.
The entire repair process took about 11 hours in total (along with photographing the repair stages and assembling the diaphragm and shutter assembly).
And finally, a couple of useful links:
1. Error codes for Canon cameras
2. Resident software for Canon digital cameras, significantly expanding their capabilities.
Video (click to play). |
My best wishes! Igor Lysokon Odessa 20/09/2010