Problem with OHP

gagarin61 · 2005-07-22 3:01 pm

A month ago through Ebay I bought an OHP Eiki OHP-250M with 250W AC metal-halide lamp inside. I was glad about it not so long. Yesterday I could not start it.

When I turned on my OHP, I heard a high frequency noise made by high voltage board. Inside the lamp I saw a dim blue arc but lamp had not started.

I don’t know what trouble with. May be somebody had such experience? Should ballast make a noise if lamp is faulty? May be the problem is with a ballast? Or lamp cause it.

Please help me!

ywh · 2005-07-23 1:51 pm

gagarin61 said:
A month ago through Ebay I bought an OHP Eiki OHP-250M with 250W AC metal-halide lamp inside. I was glad about it not so long. Yesterday I could not start it.

When I turned on my OHP, I heard a high frequency noise made by high voltage board. Inside the lamp I saw a dim blue arc but lamp had not started.

I don’t know what trouble with. May be somebody had such experience? Should ballast make a noise if lamp is faulty? May be the problem is with a ballast? Or lamp cause it.

Please help me!

what type of your ballast?
give me a pic

gagarin61 · 2005-07-23 4:23 pm

Re: Re: Problem with OHP

ywh said:
what type of your ballast?
give me a pic

I don't know its type....

My ballast consist of two boards. I will try to post here their images.

First Board:

gagarin61 · 2005-07-23 4:42 pm

And the second small but high voltage board. Exactly this board makes noise even in idle mode (without a lamp).

ywh · 2005-07-24 2:14 am

do you have a multimeter?
test the ends of the lamp?
DC or AC?
v?

gagarin61 · 2005-07-24 2:49 am

ywh said:
do you have a multimeter?
test the ends of the lamp?
DC or AC?
v?

Lamp is UMI-250PE, metal-halide 250W (early by e-mail you said that it is AC type).

I don't have a multimeter... I cannot answer your questions...

ywh · 2005-07-24 2:56 pm

gagarin61 said:
Lamp is UMI-250PE, metal-halide 250W (early by e-mail you said that it is AC type).

I don't have a multimeter... I cannot answer your questions...

You don't have a multimeter?

How do you to do DIY?

get one pleace! it is cheaper. only 10$ in my city.

gagarin61 · 2005-07-25 2:27 pm

ywh said:
You don't have a multimeter?

How do you to do DIY?

get one pleace! it is cheaper. only 10$ in my city.

I don't have a multimeter... It is useless device for incompetent person...

It is simply. I did my DIY projector only from two parts. There are OHP and Infocus PowerView 820 projection panel. What is a reason I need to have a multimeter for?

Now my OHP is faulty. And I am disappointed that nobody can help me. I don't believe that nobody has the same OHP (Eiki OHP-250M or 2500M). It is not big deal to remove lamp, switch on an OHP and post an answer in this topic. I would be so appreciative.

ywh · 2005-07-26 5:21 am

give me a pic of your new lamp

ywh · 2005-07-26 5:33 am

simply way:
you buy my lamp,try to run it ,.
if the lamp can not work,return the lamp to me ,you lost shipping(5+5$) only.
OK?

gagarin61 · 2005-07-27 8:36 am

ywh said:
give me a pic of your new lamp

I attached a photo of my poor lamp. I don't have a new one.

ywh said:
simply way:
you buy my lamp,try to run it ,.
if the lamp can not work,return the lamp to me ,you lost shipping(5+5$) only.
OK?

For a start please say what kind of lamp do I need (AC/DC). Early you wrote me that my lamp and ballast are AC. But from one source I read that my ballast is DC. But I am not sure. It was japanese web page translated to English by Google.

I post here a quote:
....
Lighting device:
Fixed electrical switching ballast
...

ywh · 2005-07-27 1:59 pm

where is the japanese web page ?
I can see some words, Chinese words are part of Japanese.
If you are not sure in DC or AC. yon can choose DC,
A DC lamp can be used in a AC ballast, it has 70-80% life.

gagarin61 · 2005-07-27 2:29 pm

ywh said:
where is the japanese web page ?
I can see some words, Chinese words are part of Japanese.
If you are not sure in DC or AC. yon can choose DC,
A DC lamp can be used in a AC ballast, it has 70-80% life.

Ah, you are a polyglot!

Try to translate it:
http://www.eiki.jp/ohp/ohp-2500M.htm

My lamp is marked as UMI-250PE. I found a bit information about a lamp UMI-250.

http://www1.ushio.co.jp/catalog/100e/1035.html

I don't know what is difference between UMI-250 and UMI-250PE.

gagarin61 · 2005-07-28 2:31 pm

gagarin61 said:
A month ago through Ebay I bought an OHP Eiki OHP-250M with 250W AC metal-halide lamp inside. I was glad about it not so long. Yesterday I could not start it.

When I turned on my OHP, I heard a high frequency noise made by high voltage board. Inside the lamp I saw a dim blue arc but lamp had not started.

I don’t know what trouble with. May be somebody had such experience? Should ballast make a noise if lamp is faulty? May be the problem is with a ballast? Or lamp cause it.

Please help me!

The problem is solved. Faulty lamp caused a trouble. Today I got a new one for 70 AUD (~50 USD).

To ywh: Thank you very much! Only you had reacted and only you was trying to help...

ywh · 2005-07-29 11:02 am

arienrosendale · 2005-10-18 7:54 am

eiki 2500m

i finaly got my self a suitable projector, but forgot to check the bulbs. can someone tell me where i can get a UMI-250PE bulb for am EIKI 2500m ohp?

gagarin61 · 2005-12-01 9:12 am

For all Australians

Hi,

Recently I received a lot of email with a question where I bought my lamp (UMI-250PE).

I bought a lamp in Adelaide. Company - B&H Australia. URL: www.bhaustralia.com.au. You can find the nearest office there.

Problem with OHP

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