Bulb Replacement Procedure

[Buckle-meister]

Dear all.

I've priced a replacement lamp for my InFocus Screenplay 5700 DLP projector and it will be £100 (approximately $170) cheaper to buy it over the internet than through the shop where I bought my system (don't worry; I've checked regarding warranty etc.). For this reason, I'll need to fit the new lamp myself.

I've removed the lamp module from my projector (refer to attachment) and have a couple of questions for those who've been in the same circumstance that I now find myself.

1. To remove the lamp from the module and fit it's replacement, do I just undo the screws in the four corners of the square lamp ceramic casing and withdraw it, then do the reverse to fit the new lamp (being extremely careful not to touch the new lamp's glass)?
2. Is (what looks like) the little fan at the side of the module what's known as the 'filter', and if so, how do I clean this?

Thanks in advance for any and all help.

 

[mtrycrafts]

Dear all.

I've priced a replacement lamp for my InFocus Screenplay 5700 DLP projector and it will be £100 (approximately $170) cheaper to buy it over the internet than through the shop where I bought my system (don't worry; I've checked regarding warranty etc.). For this reason, I'll need to fit the new lamp myself.

I've removed the lamp module from my projector (refer to attachment) and have a couple of questions for those who've been in the same circumstance that I now find myself.

1. To remove the lamp from the module and fit it's replacement, do I just undo the screws in the four corners of the square lamp ceramic casing and withdraw it, then do the reverse to fit the new lamp (being extremely careful not to touch the new lamp's glass)?
2. Is (what looks like) the little fan at the side of the module what's known as the 'filter', and if so, how do I clean this?

Thanks in advance for any and all help.

I haven't replaced these either but from your nice close up, it appears that the 4 torx will get you to the bulb. You may want to make sure that the replacement bulb's filament is in the same direction as the old one, if that hatters with that two prong base. Most likely not.
Can you tell what that tab with that screw overhanging the bulb frame is for?

As to the filter, that too should pop off with the attachment screws and the filter element may be inside someplace? I doubt you would harm it by undoing the screw and investigating it.

If your picture is accurate, it looks as though the lamp's reflector surface is getting hazed over; not a good sign.

In microfilm readers the color changes a lot when that happens; replacement time.

 

[Buckle-meister]

Thanks for answering Mtrycrafts.

Can you tell what that tab with that screw overhanging the bulb frame is for?

Yes; once the module is placed inside the projector with the two 'spikes' guided into their matching holes, a single screw through the tab secures the module to the projector itself.

...it looks as though the lamp's reflector surface is getting hazed over; not a good sign.

Yes. The lamp is totally knackered.

 

[The Chukker]

Perhaps a stupid question, but is there no documentation from the manufacturer about bulb replacement procedure? Please understand my question has more ingrained relevance than sarcasm as both my tv's (gaming and HT) are Samsung DLP's and I was led to believe at POS that the procedure was well documented and easy for the DIY'er.

 

[majorloser]

Luke, Use the Force!

Rest easy my young Padawon, there is hope.

Well, I guess you bought an after-market replacement bulb if it's required to be removed from the cartridge. I read the owner's manual for that projector and it simply states to replace the cartridge as one piece. Most cartridges are exactly that, "one piece". They require no dissassembly.

Now if you decided to go the DIY'r method and found just the bulb part of the assembly (very cool), you will need to take the old unit completely apart. If nothing more than just to clean the dust off. Especially the fan and the air channel.

As was stated before, it looks like four Torx screws hold the bulb and two (maybe three) Torx screws hold the fan. Since this is bad bulb don't worry about being rough or touching the glass on this one. It's a good practice bulb to prepare for the real thing. It looks like there is an internal wire spring clip that holds the bulb in place. Carefully un-hook it from the securing posts with a pair of needle nose pliers. The bulb should come out fairly easily. After you get the bulb out you may notice the connectors on the back for the wiring harness. Usually the wires are attached to the back of the bulb with nuts on a threaded post. CAREFULLY take the nuts off. They sometimes use a thread locking compound on them so this might need to be cleaned off with a small wire brush. Sometimes the tip of a hot soldering iron will heat it up enough to break down the bond and make it come apart easier.

Once you have the unit completely apart, CLEAN IT THOROUGHLY with alcohol and Q-tip cotton swab. Make sure there is no grease, fingerprints or dirt left behind.

VERY IMPORTANT
Get a pair of photo lab cotton glove before you handle anything further. One fingerprint on the new bulb will significantly reduce the life of the bulb. The oils left from a fingerprint causes a "cool" spot on the area of the bulb or reflector glass surface. This spot will run cooler than the rest of the bulb and cause fatigue in the quartz crystal glass structure. In other words, POP!

Now carefully put the new bulb in the cartridge and reassemble in reverse order. Be careful with the wire spring clip as this is the hardest part to get right (and tight).

Now go forth young Padawon and beware of the Dark Side of the force. It will cause you to get angry, throw the bulb and get drunk.

 

[Buckle-meister]

Well, I guess you bought an after-market replacement bulb if it's required to be removed from the cartridge. I read the owner's manual for that projector and it simply states to replace the cartridge as one piece. Most cartridges are exactly that, "one piece". They require no dissassembly.

I've not actually bought the lamp yet. 'Just need to confirm a couple of things with the company on Monday before going ahead and ordering it. I also thought one just replaced what I've been referring to as the module (as opposed to the lamp). This seems to agree with the pdf you supplied (thanks for that ).

Now if you decided to go the DIY'r method and found just the bulb part of the assembly (very cool), you will need to take the old unit completely apart.

The reason I thought it would just be the lamp and not the module that was replaced was because of the picture here. Maybe it's just indicative though.

After you get the bulb out you may notice the connectors on the back for the wiring harness. Usually the wires are attached to the back of the bulb with nuts on a threaded post. CAREFULLY take the nuts off. They sometimes use a thread locking compound on them so this might need to be cleaned off with a small wire brush. Sometimes the tip of a hot soldering iron will heat it up enough to break down the bond and make it come apart easier...Now carefully put the new bulb in the cartridge and reassemble in reverse order. Be careful with the wire spring clip as this is the hardest part to get right (and tight).

Oh man; this sounds a bit dodgy. Lots of money resting on this... Hopefully the item I propose to buy is actually a module and not just a lamp to save me having to do this. Maybe this explains the price difference between the internet and shop. Maybe the price from the shop is for a module and the price from the internet is for just the lamp.

 

[majorloser]

Nah, the internet will be cheaper since they'll just drop ship from the factory. The .pdf file I attached showed the whole assembly as one unit.

Now you see why they aren't cheap. It's not just a bulb. The bulb has to be held in the proper position for aim and air flow.

 

[majorloser]

Here's you bulb cartridge:

http://www.projectorlampcenter.com/detail.aspx?ID=6189

 

[Buckle-meister]

Here's you bulb cartridge...

Nice one. It appears that it'll be a piece of cake then. Hopefully I can get this tomorrow. Will let you know.

 

[mtrycrafts]

Nice one. It appears that it'll be a piece of cake then. Hopefully I can get this tomorrow. Will let you know.

See if you can buy just the bulb and how much that is? Maybe you can save a bunch Replacement seems simple.

 

[majorloser]

See if you can buy just the bulb and how much that is? Maybe you can save a bunch Replacement seems simple.

It's tough to find just the bulb. Most of them are made by Osram (Sylvania) and the particular size is proprietary to the company they sell it to (OEM). I have been able to find source that say they can get them (black market stuff ). Some of the bulbs are manufactured in Japan and some in Europe. The European bulb are a little easier to find.

If you have an old bulb that you don't mind destroying, take the cartridge apart and look for any markings. You will need wattage, also. They are all VIP series bulbs.

 

[mtrycrafts]

It's tough to find just the bulb. Most of them are made by Osram (Sylvania) and the particular size is proprietary to the company they sell it to (OEM). I have been able to find source that say they can get them (black market stuff ). Some of the bulbs are manufactured in Japan and some in Europe. The European bulb are a little easier to find.

If you have an old bulb that you don't mind destroying, take the cartridge apart and look for any markings. You will need wattage, also. They are all VIP series bulbs.

He does have an old one to destroy That is why he is looking for a replacement. An opportune time to experiment The manual should have the wattage and type, UHP, Xenon, etc.

It seems a lot of waste to replace the whole assembly, not just the broken part

 

[Buckle-meister]

He does have an old one to destroy...

He?

The manual should have the wattage and type, UHP, Xenon, etc.

It does.

It seems a lot of waste to replace the whole assembly, not just the broken part.

It does.

 

[mtrycrafts]

He?

You. You have the old one, not working, that you can experiment with no matter what as it seems the bulb is not available by itself so you have nothing to loose?