1979 Zenith 19 - Shutter Arm

A Minolta X500 is a 15+ year old camera. The shutter arm is stuck in the winding position is an indication that the shutter mechanics are broken. Repair would be way more expensive then picking up a used model. Minolta has dropped out of the camera business, some older Sony digital cameras can use their lenses if you have a number of them. Zoom lenses are usually what comes with most camera kits.

All shutters do have a certain tolerance. Because you don't say anything about the real time the shutter is open, It is impossible to tell what camera has a "correct" shutter time. Or if they both are of. I used to calibrate my camera's, because most of the time the next time is exact twice or half of the former time on the dial. Even with the band new cameras in the past, I shot one or two rolls, to check if my settings were correct. Never had any trouble with shutter times, because I never checked how long the were open.

A stuck lens cover is a fairly common problem, but it is normally easy to fix. A single grain of sand jamming the cover mechanism is normally the culprit, and you want to try to dislodge it. There are many non-invasive techniques that people have come up with to accomplish this. Some may be seen on this blog article. You can also open the lens barrel up to fix the covers, but only as a very last resort. The article also gives examples for this type of procedure.

This is either your toner cartridge or more likely the plastic arm that opens the laser shutter is broken. When you insert a toner and close the access door, there is a plastic arm that opens the laser shutter. If this shutter does not open it blocks the laser and results in blank copies. If the arm is broken you CAN open the laser shutter manually and block it open. What you need to do it open the cartridge access door, remove the cartridge and look for a 1/2 inch wide slot running from left to right in the metal frame that is in the back upper section where the cartridge goes. The plastic arm that operates the black plastic shutter is on the right side. If broken you can manually lift up the shutter and "block" it open using something like a folded up scrap of paper. I know it sounds strange but I have used this repair on several of my customers machines and they have all worked fine since. If you can not find or effect the repair yourself at least you will know where to point the service person when they come out to look at it.
Good Luck and Thank You for using Fixya.

Subject:
Prevention of blank image (modifying the shape of the laser shutter and applying grease to the laser shutter arm)
Detail:
<Symptom>
Since the laser shutter [1] is not opened when the toner cartridge is inserted into the machine, a blank image is output in
some cases.
[1] Laser shutter
[2] Laser shutter arm
<Cause>
When the toner cartridge is inserted, the laser shutter arm [2] pushes down on the laser shutter [1]. In case that the arm has
a scratch on its sliding surface, however, it is caught in the area [3] where the arm comes into contact with the shutter,
preventing the shutter from being opened.
Service Bulletin LBP-FAX/LBP-MFP
HARDWARE
Issued by Canon Europa N.V.
MF6500-014 Rev. 3
(2/4)
[A] View of the closed laser shutter [1] Laser shutter
[B] View of the opened laser shutter [2] Laser shutter arm
[3] Area where the arm is caught
<Factory measures>
a. Modifying the shape of the laser shutter
Modify the shape of the laser shutter so as to prevent the shutter from being caught when the laser shutter arm pushes it
(A turnback is added to the edge of the area that contacts the laser shutter arm).
P-3 Laser shutter [A] Old type
[B] New type
b. Applying grease to the laser shutter arm
To decrease the sliding resistance of the contacting surface (P-2 [3]) of the laser shutter arm and laser shutter, apply grease
to the laser shutter arm.
P-4 Laser shutter arm [1] Grease application area
MF6500-014 Rev. 3
(3/4)
c. Changing the shape of the laser shutter arm and applying grease to it.
To decrease the sliding resistance of the contacting surface of the laser shutter arm and laser shutter, change the shape of
the laser shutter arm. Additionally, apply grease to the arm.
P-5 Laser shutter arm [1] View of the rib in the new position
[A] Old type [2] View of the new shape of rib
[B] New type [3] View of the arm from which the rib is removed
d. Discontinuing application of grease to the laser shutter arm.
It was confirmed that the new shape of the laser shutter and laser shutter arm do not need lubrication by grease for normal
operation. From this, application of grease is discontinued.
Service Work:
When the foregoing symptom occurs, replace the laser shutter with the new type. In addition, remove the laser shutter arm
and apply a rice-grain sized amount of grease (PERMALUB G No. 2); about 30mg) evenly to the area [1] shown in P-4.
As for a machine having one of the serial numbers listed in “Affected Machines” below as “machines for which the shape
change of the laser shutter is carried out”, only application of grease is required: there is no need to replace the laser
shutter arm because the new type shutter has already been mounted onto them.
When replacing with the new type of laser shutter arm, there is no need to apply grease to it.
Service Parts:
No. Part No. Part Name Q’ty Stock Compatibility
Available
from Fig. No.
O FC6-7328-000 SHUTTER, LASER 1 > 0 1 N FC6-7328-020 SHUTTER, LASER 0 > 1 DC NY In stock 102
2 ON CK-055 1-020 LUBE, PERMALUB G NO. 2 0 > 1 F In stock -
3 ON FFCC66--77333311--000200 AARRMM,, SSHHUUTTTTEERR,, LLAASSEERR 10 >> 01 DC YN In stock 102
Affected Machines:
- Machines for which the shape change of the laser shutter is carried out
LaserBase MF6530 EU1 SNF50048 and later
LaserBase MF6550 EU1 SNG50009 and later
i-SENSYS MF6530 EU1 BAC02001 and later
i-SENSYS MF6550 EU1 DAC02001 and later
LaserBase MF6540PL EU1 SNP50288 and later
LaserBase MF6560PL EU1 SNQ50001 and later
LaserBase MF6580PL EU1 SNR21266 and later
i-SENSYS MF6540PL EU1 EAC02001 and later
i-SENSYS MF6560PL EU1 FAC02001 and later
i-SENSYS MF6580PL EU1 GAC02001 and later
LaserBase MF6530 EU2 SNX50504 and later
LaserBase MF6550 EU2 SPB50568 and later
LaserBase MF6540PL EU2 SPC50196 and later
LaserBase MF6560PL EU2 SPD50012 and later
LaserBase MF6580PL EU2 SPF50288 and later
LaserBase MF6550 EU3 SPG50312 and later
MF6500-014 Rev. 3
(4/4)
LaserBase MF6560PL EU3 SPH50444 and later
LaserBase MF6580PL EU3 SPJ50384 and later
i-SENSYS MF6530 EU2 HAC02001 and later
i-SENSYS MF6550 EU2 NAC02001 and later
i-SENSYS MF6540PL EU2 PAC02001 and later
i-SENSYS MF6560PL EU2 QAC02001 and later
i-SENSYS MF6580PL EU2 SAC02001 and later
i-SENSYS MF6550 EU3 VAC02001 and later
i-SENSYS MF6560PL EU3 WAC02001 and later
i-SENSYS MF6580PL EU3 XAC02001 and later
- Machines for which both the shape change of the laser shutter and application of grease to the laser shutter arm is carried out
i-SENSYS MF6530 EU1 BAC02945 and later
i-SENSYS MF6550 EU1 DAC02865 and later
i-SENSYS MF6540PL EU1 EAC04003 and later
i-SENSYS MF6560PL EU1 FAC03073 and later
i-SENSYS MF6580PL EU1 GAC02833 and later
i-SENSYS MF6530 EU2 HAC02049 and later
i-SENSYS MF6550 EU2 NAC03737 and later
i-SENSYS MF6540PL EU2 PAC02633 and later
i-SENSYS MF6560PL EU2 QAC03593 and later
i-SENSYS MF6580PL EU2 SAC02105 and later
i-SENSYS MF6550 EU3 VAC03185 and later
i-SENSYS MF6560PL EU3 WAC02665 and later
i-SENSYS MF6580PL EU3 XAC03025 and later
- Machines for which the following are carried out: change of the laser shutter shape, applicatin of grease to the laser
shutter arm, and change of the laser shutter arm shape
i-SENSYS MF6530 EU1 BAC02945 and later
i-SENSYS MF6550 EU1 DAC02865 and later
i-SENSYS MF6540PL EU1 EAC04003 and later
i-SENSYS MF6560PL EU1 FAC03073 and later
i-SENSYS MF6580PL EU1 GAC02833 and later
i-SENSYS MF6530 EU2 HAC02049 and later
i-SENSYS MF6550 EU2 NAC03737 and later
i-SENSYS MF6540PL EU2 PAC02633 and later
i-SENSYS MF6560PL EU2 QAC03593 and later
i-SENSYS MF6580PL EU2 SAC02105 and later
i-SENSYS MF6550 EU3 VAC03185 and later
i-SENSYS MF6560PL EU3 WAC02665 and later
i-SENSYS MF6580PL EU3 XAC03025 and later
- Machines for which the following is carried out: discontinuance of application of grease to the laser shutter arm
i-SENSYS MF6530 EU1 BAC02946 and later
i-SENSYS MF6550 EU1 DAC03161 and later
i-SENSYS MF6540PL EU1 EAC04003 and later
i-SENSYS MF6560PL EU1 FAC03073 and later
i-SENSYS MF6580PL EU1 GAC02833 and later
i-SENSYS MF6530 EU2 HAC02121 and later
i-SENSYS MF6550 EU2 NAC03737 and later
i-SENSYS MF6540PL EU2 PAC02633 and later
i-SENSYS MF6560PL EU2 QAC03593 and later
i-SENSYS MF6580PL EU2 SAC02105 and later
i-SENSYS MF6550 EU3 VAC03185 and later
i-SENSYS MF6560PL EU3 WAC02665 and later
i-SENSYS MF6580PL EU3 XAC03025 and later

Ok, the problem may well be the mirror charge latch. This is very commonly the cause of failure to wind or fire. The catch will be out of sync with the charging lever etc and so the mirror springs will not stay tensioned.

If it is, the cammera will be stuck with the shutter charged (Cocked) but will not fire because the mirror has not been properly primed. (The shutter is actually fired by the mirror. The shutter button actually releases the mirror.)

The locking arm keeps the main mirror spring tensioned until the closing shutter blind has fully closed. The blind roller engages with a gear which releases the

Remove the bottom cover. There is a long lever shiny arm engaging a crank-pin on winder gear extending to a point just below camera-right of the lens mount. It pivots on a large screw, and there is a largish wire spring which extends to engage a small hole in the end of a lever near the arm end, that dissapears into the camera.

The lever with the hole in it is the mirror charging arm, the long shiny lever pushes this towards the front of the camera to tension the mirror springs, when the film advance is operated.

Next to this is a shorter arm which extends over a gear at one end and is free at the other. This is the latch. The gear wheel engages a small pinion which is in fact the end of the blind roller for the closing curtain/blind. A peg on this gear strikes the other end of the latch to move it out the way and release the mirror tension after the shutter has finished, and this in trun resets the mirror, and releases the winder.

When the mirror is charged the mirror charging arm is held in the tensioned position by the 'free' end of the latch. If the shutter is ready to fire the charging arm should be pressing against the free end. If it isn't the camera will not fire.

To fix this it is easier if the shutter is fired. To do this first remove the large screw holding the long arm. Not forgetting the spring! There is a washer which must be removed too. Do not lose this it is important. This gets it out of the way. now push the charging arm towards camera front as far as it will go. You won't get it all the way, as the latch will be in the way, just as far as you can. If it isn't in the way, then this is not your problem!

Holding it in this position, press the shutter release. This should fire the shutter. If it does not fire then you may also have to remove the latch to allow you to push the arm forwards a little more. (In fact if you can hold the arm in the primed position you could replace the catch in the primed position. This is awkward though!)

When the shutter has fired the latch should move to the 'reset' position, allowing the charging arm to be pushed past it's end. If this is OK, you need to push the lever back to the reset postion. The mirror will remain in the up postion until you do this.

Now you can replace the long arm, again not forgetting the spring. The screw that holds that on has a shoulder, that the spring loops around, and the washer has a flat spot in the hole which means it has to be fitted in the right position. The end of the spring should poke through the mirror arm hole. The easiest way to reassemble this is to put the arm in, then fit the washer. Now place the spring loosely in position, and then put the screw in place loosley. This allows you to manuver the end of the sprion into the hole, You can then carefully tighten the screww. The washer has a tendency to become dislodged so you might have to try this a couple of times. (A blob of grease here can help keep the washer in place.)

If that's all OK then you should be able to wind and fire. If everything seems fine, check the screws are firm (Don't overtighten any!) and replace the bottom cover.


This is a very common fault, and is often caused by jarring the camera just at the wrong monent, but it can develop in an old camera (and they all are!) just due to wear. The latch has in fact changed in shape several times in the lifteime of this mechanism (and it was still in use in K1000's in 1997!) and is the mst common single cause of jams in these cameras.

A little lubrication can help. A spot of lighter fluid can be used to remove old oil and grease from the winder gear, the cocking arm pivot, anf the latch pivot. A tiny amount of grease can be applied to the slow moving pivots and contact points only. A tiny drop of watch oil can be used on the latch pivot. and the opeating peg, but no oil must get into the axle or teeth of the gear itself. This can cause uneven and erratic running of the curtain.

Internal Components 2
Subject:
Prevention of blank image (modifying the shape of the laser shutter and applying grease to the laser shutter arm)
Detail:
<Symptom>
Since the laser shutter [1] is not opened when the toner cartridge is inserted into the machine, a blank image is output in
some cases.
[1] Laser shutter
[2] Laser shutter arm
<Cause>
When the toner cartridge is inserted, the laser shutter arm [2] pushes down on the laser shutter [1]. In case that the arm has
a scratch on its sliding surface, however, it is caught in the area [3] where the arm comes into contact with the shutter,
preventing the shutter from being opened.
Service Bulletin LBP-FAX/LBP-MFP
HARDWARE
Issued by Canon Europa N.V.
MF6500-014 Rev. 3
(2/4)
[A] View of the closed laser shutter [1] Laser shutter
[B] View of the opened laser shutter [2] Laser shutter arm
[3] Area where the arm is caught
<Factory measures>
a. Modifying the shape of the laser shutter
Modify the shape of the laser shutter so as to prevent the shutter from being caught when the laser shutter arm pushes it
(A turnback is added to the edge of the area that contacts the laser shutter arm).
P-3 Laser shutter [A] Old type
[B] New type
b. Applying grease to the laser shutter arm
To decrease the sliding resistance of the contacting surface (P-2 [3]) of the laser shutter arm and laser shutter, apply grease
to the laser shutter arm.
P-4 Laser shutter arm [1] Grease application area
MF6500-014 Rev. 3
(3/4)
c. Changing the shape of the laser shutter arm and applying grease to it.
To decrease the sliding resistance of the contacting surface of the laser shutter arm and laser shutter, change the shape of
the laser shutter arm. Additionally, apply grease to the arm.
P-5 Laser shutter arm [1] View of the rib in the new position
[A] Old type [2] View of the new shape of rib
[B] New type [3] View of the arm from which the rib is removed
d. Discontinuing application of grease to the laser shutter arm.
It was confirmed that the new shape of the laser shutter and laser shutter arm do not need lubrication by grease for normal
operation. From this, application of grease is discontinued.
Service Work:
When the foregoing symptom occurs, replace the laser shutter with the new type. In addition, remove the laser shutter arm
and apply a rice-grain sized amount of grease (PERMALUB G No. 2); about 30mg) evenly to the area [1] shown in P-4.
As for a machine having one of the serial numbers listed in “Affected Machines” below as “machines for which the shape
change of the laser shutter is carried out”, only application of grease is required: there is no need to replace the laser
shutter arm because the new type shutter has already been mounted onto them.
When replacing with the new type of laser shutter arm, there is no need to apply grease to it.
Service Parts:
No. Part No. Part Name Q’ty Stock Compatibility
Available
from Fig. No.
O FC6-7328-000 SHUTTER, LASER 1 > 0 1 N FC6-7328-020 SHUTTER, LASER 0 > 1 DC NY In stock 102
2 ON CK-055 1-020 LUBE, PERMALUB G NO. 2 0 > 1 F In stock -
3 ON FFCC66--77333311--000200 AARRMM,, SSHHUUTTTTEERR,, LLAASSEERR 10 >> 01 DC YN In stock 102
Affected Machines:
- Machines for which the shape change of the laser shutter is carried out
LaserBase MF6530 EU1 SNF50048 and later
LaserBase MF6550 EU1 SNG50009 and later
i-SENSYS MF6530 EU1 BAC02001 and later
i-SENSYS MF6550 EU1 DAC02001 and later
LaserBase MF6540PL EU1 SNP50288 and later
LaserBase MF6560PL EU1 SNQ50001 and later
LaserBase MF6580PL EU1 SNR21266 and later
i-SENSYS MF6540PL EU1 EAC02001 and later
i-SENSYS MF6560PL EU1 FAC02001 and later
i-SENSYS MF6580PL EU1 GAC02001 and later
LaserBase MF6530 EU2 SNX50504 and later
LaserBase MF6550 EU2 SPB50568 and later
LaserBase MF6540PL EU2 SPC50196 and later
LaserBase MF6560PL EU2 SPD50012 and later
LaserBase MF6580PL EU2 SPF50288 and later
LaserBase MF6550 EU3 SPG50312 and later
MF6500-014 Rev. 3
(4/4)
LaserBase MF6560PL EU3 SPH50444 and later
LaserBase MF6580PL EU3 SPJ50384 and later
i-SENSYS MF6530 EU2 HAC02001 and later
i-SENSYS MF6550 EU2 NAC02001 and later
i-SENSYS MF6540PL EU2 PAC02001 and later
i-SENSYS MF6560PL EU2 QAC02001 and later
i-SENSYS MF6580PL EU2 SAC02001 and later
i-SENSYS MF6550 EU3 VAC02001 and later
i-SENSYS MF6560PL EU3 WAC02001 and later
i-SENSYS MF6580PL EU3 XAC02001 and later
- Machines for which both the shape change of the laser shutter and application of grease to the laser shutter arm is carried out
i-SENSYS MF6530 EU1 BAC02945 and later
i-SENSYS MF6550 EU1 DAC02865 and later
i-SENSYS MF6540PL EU1 EAC04003 and later
i-SENSYS MF6560PL EU1 FAC03073 and later
i-SENSYS MF6580PL EU1 GAC02833 and later
i-SENSYS MF6530 EU2 HAC02049 and later
i-SENSYS MF6550 EU2 NAC03737 and later
i-SENSYS MF6540PL EU2 PAC02633 and later
i-SENSYS MF6560PL EU2 QAC03593 and later
i-SENSYS MF6580PL EU2 SAC02105 and later
i-SENSYS MF6550 EU3 VAC03185 and later
i-SENSYS MF6560PL EU3 WAC02665 and later
i-SENSYS MF6580PL EU3 XAC03025 and later
- Machines for which the following are carried out: change of the laser shutter shape, applicatin of grease to the laser
shutter arm, and change of the laser shutter arm shape
i-SENSYS MF6530 EU1 BAC02945 and later
i-SENSYS MF6550 EU1 DAC02865 and later
i-SENSYS MF6540PL EU1 EAC04003 and later
i-SENSYS MF6560PL EU1 FAC03073 and later
i-SENSYS MF6580PL EU1 GAC02833 and later
i-SENSYS MF6530 EU2 HAC02049 and later
i-SENSYS MF6550 EU2 NAC03737 and later
i-SENSYS MF6540PL EU2 PAC02633 and later
i-SENSYS MF6560PL EU2 QAC03593 and later
i-SENSYS MF6580PL EU2 SAC02105 and later
i-SENSYS MF6550 EU3 VAC03185 and later
i-SENSYS MF6560PL EU3 WAC02665 and later
i-SENSYS MF6580PL EU3 XAC03025 and later
- Machines for which the following is carried out: discontinuance of application of grease to the laser shutter arm
i-SENSYS MF6530 EU1 BAC02946 and later
i-SENSYS MF6550 EU1 DAC03161 and later
i-SENSYS MF6540PL EU1 EAC04003 and later
i-SENSYS MF6560PL EU1 FAC03073 and later
i-SENSYS MF6580PL EU1 GAC02833 and later
i-SENSYS MF6530 EU2 HAC02121 and later
i-SENSYS MF6550 EU2 NAC03737 and later
i-SENSYS MF6540PL EU2 PAC02633 and later
i-SENSYS MF6560PL EU2 QAC03593 and later
i-SENSYS MF6580PL EU2 SAC02105 and later
i-SENSYS MF6550 EU3 VAC03185 and later
i-SENSYS MF6560PL EU3 WAC02665 and later
i-SENSYS MF6580PL EU3 XAC03025 and later

It could be a simple issue with the shutter magnets, or something more severe with the electronics. What does the meter needle do when you push the shutter release down? With the speed dial set at 1/125 or higher and no lens, the needle should move fairly high. If it pegs to the bottom right away, that is a bad sign.

You can check the magnets from the bottom with the cover removed. (2 screws) You can release the mechanicals of the shutter by pushing the silver lever arm (located next to the plastic shield around the magnet on the rewind side of the camera) toward the front of the camera. Be mindful of the spring attached

Hey dentryte,
According to the manufacturer this camera does require the battery to function at all. The usable batteries for this camera are Silver Oxide Battery (6V ) (Eveready (UCAR) No.544, JIS 4G 13, Mallory PX 28; Alkaline Manganese Battery (6V) (Eveready (UCAR) No.537, Mallory 7K l 3). I have included a link to a PDF download of your camera manual in case you don't have one. I hope this helps!

http://www.canonfd.com/pdf/a1.pdf

Sincerely,
Allan
Go Ahead. Use Us.

Yes this is fairly common with K 1000 and the Spotmatics : although the shutter is cocked and hence you cannot advance film you cannot release shutter because mirror box is not cocked. Remedy : remove bottom cover and locate mirror box lever which protrudes slightely and is movable up and down and is spring loaded. Move upwards until it licks in position ( moving up against spring tension ). Now release the shutter and camera should let you advance the film .