Commercial Projector Ballast Bypass Guide - Page 3

barambulli · 21st June 2009, 06:31 PM

Nobody??????????

crazifunguy · 22nd June 2009, 02:01 PM

Quote:

Originally posted by barambulli
Hello to all,

I have a Hitachi PJ-TX100 I am trying to fit an alernative light source to.
Can anybody help me with bypasing the ballast?

Thanks.

I read this and kinda frown. Did you follow the steps exactly as posted?

Look for the ballast. Theres 2 sets of wires. Main Power 360V and the control wires. Unplug them from the ballast and find the correct wire to ground.

Please everyone give me feedback if my instructions are not clear maybe I will make a video on how this is done.

phil196 · 30th June 2009, 05:10 PM

hi all new here. dose any one know how how to bypass the ballast on a lp350??
thanks..

crazifunguy · 1st July 2009, 03:23 PM

Quote:

Originally posted by phil196
hi all new here. dose any one know how how to bypass the ballast on a lp350??
thanks..

Did you atleast attempt to bypass it urself with the posted instructions? If so post some pictures and I will help you.

phil196 · 1st July 2009, 09:52 PM

thanks for the reply i have had a look at the ballast but the only problem is its all in one fix unit ie the power supply and ballast are all in one unit i will strip it down again and post up some pics
thanks..

lugina · 14th July 2009, 02:50 PM

Hello all, i have a problem when bypassing the ballast on my 3M MP7630
it have 3 wire (black-red-brown)from the ballast to the main power supply. and 2 big wire to supply the power to the ballast

(mainboard)----(power supply)----(ballast)

first i remowe the ballast from the power supply, and then i try to grounding each one of the three wire, but something happend, the pcb line in the power supply get burn

. do i grounding the wrong cable ??

if someone had succeed on bypassing the 3M mp7630 PJ , please help me ..

mikeymms · 14th July 2009, 02:51 PM

I've just done this successfully. However I'm a bit worried about the ballast still being intact.

On my projector (NEC VT440) the ballast is buried deep inside and really inaccessible. I didn't want to completely dismantle the projector so I measured all the voltages with projector intact, found one that was +3.33V without the lamp and 0.03V with the lamp. I then cut just that wire and attached it to the steel housing of the power supply to ground it (as it was the easiest option) and it works perfectly.

I'm worried about burning out my mainboard long term due to having cut just one wire, leaving everything else intact and connected. Is that a problem or will it be fine if I leave everything intact? Do I HAVE to disconnect the ballast??

Thanks

lugina · 15th July 2009, 02:03 PM

@mikeymms
i think you should disconnect the power wire from the power supply to the ballast if it still connected

TopCat · 19th July 2009, 04:00 PM

If you are replacing the bulb why bypass the ballast? Am I missing something or is this to see if the ballast is bad and if it is then can you run the PJ without buying a new bulb?

TopCat · 19th July 2009, 07:59 PM

Nevermind. I was a lttle confused and was thinking it was something else.

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21st June 2009, 06:31 PM	#21
barambulli diyAudio Member Join Date: Jan 2009	Nobody??????????

30th June 2009, 05:10 PM	#23
phil196 diyAudio Member Join Date: Jun 2009	hi all new here. dose any one know how how to bypass the ballast on a lp350?? thanks..

1st July 2009, 09:52 PM	#25
phil196 diyAudio Member Join Date: Jun 2009	thanks for the reply i have had a look at the ballast but the only problem is its all in one fix unit ie the power supply and ballast are all in one unit i will strip it down again and post up some pics thanks..

14th July 2009, 02:50 PM	#26
lugina diyAudio Member Join Date: Jul 2009	Hello all, i have a problem when bypassing the ballast on my 3M MP7630 it have 3 wire (black-red-brown)from the ballast to the main power supply. and 2 big wire to supply the power to the ballast (mainboard)----(power supply)----(ballast) first i remowe the ballast from the power supply, and then i try to grounding each one of the three wire, but something happend, the pcb line in the power supply get burn . do i grounding the wrong cable ?? if someone had succeed on bypassing the 3M mp7630 PJ , please help me ..

14th July 2009, 02:51 PM	#27
mikeymms diyAudio Member Join Date: Feb 2009	I've just done this successfully. However I'm a bit worried about the ballast still being intact. On my projector (NEC VT440) the ballast is buried deep inside and really inaccessible. I didn't want to completely dismantle the projector so I measured all the voltages with projector intact, found one that was +3.33V without the lamp and 0.03V with the lamp. I then cut just that wire and attached it to the steel housing of the power supply to ground it (as it was the easiest option) and it works perfectly. I'm worried about burning out my mainboard long term due to having cut just one wire, leaving everything else intact and connected. Is that a problem or will it be fine if I leave everything intact? Do I HAVE to disconnect the ballast?? Thanks

15th July 2009, 02:03 PM	#28
lugina diyAudio Member Join Date: Jul 2009	@mikeymms i think you should disconnect the power wire from the power supply to the ballast if it still connected

19th July 2009, 04:00 PM	#29
TopCat diyAudio Member Join Date: Jul 2009	If you are replacing the bulb why bypass the ballast? Am I missing something or is this to see if the ballast is bad and if it is then can you run the PJ without buying a new bulb?

19th July 2009, 07:59 PM	#30
TopCat diyAudio Member Join Date: Jul 2009	Nevermind. I was a lttle confused and was thinking it was something else.

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