Re: Infocus power supply isssue
A little update I got a Viewsonic projector that is a clone of the Infocus so they had the same power supply and mainboard, my projector starts up fine now.. I was STILL unable to find out why the other board still does not have power :-/
I checked the old with the new and the readings matched up :-/
subarub4
Senior Member
Last Activity: 03-07-2024, 10:40 AM
Joined: 05-13-2013
Location: Connecticut
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Re: Infocus power supply isssue
Getting 0V from IC101 (PFC IC) checking with the ohm meter the VCC pin of the PFC seems to be connected to C117A, C117, C116 which seem to be connected to the FSU10A60 The output pin on the PFC seems to connect to the same SMD caps but connects to D107, Q602 & Q603...Leave a comment:
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Re: Infocus power supply isssue
So I should be looking between the main and the PFC for something shorted or open circuit then? I was looking at D103 on the back of the board I think it's just reading both ways because it's in circuit, and for ZD204 it appears they are only using just one of the zeners.
I'm checking with a analog ohm meter
but yeah I suspect I was not going to see that voltage on the connector, One thing I might of been doing wrong as when checking for voltage on the PFC I should of been checking between VCC and the filter cap?Leave a comment:
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Re: Infocus power supply isssue
Not mine but from a similar projector
I was told that regardless if the PFC controller was non fuctional I should still have like 339 VDC if not I must have a open circuit between the mains input and electrolytic filter capacitor, assuming the filter caps for the main?Leave a comment:
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Re: Infocus power supply isssue
I was searching online today and I noticed the Acer X1220H has the same case design as my Infocus.. does this mean it uses the same power supply?
X1320WH is more closer to my infocus and from what I can see here
add the ViewSonic PJD5523w to the list of projectors as well.Last edited by subarub4; 08-14-2013, 09:43 PM.Leave a comment:
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Re: Infocus power supply isssue
I thought about something I'm not sure what came before the In116 model projector (what I have) but I was thinking of getting a power supply close to the model since the connectors seem to be about the same.. whatever that does not fit I can swap over.
I figure it will turn on without any issues, too little current or too much voltage.
Since I know the standby should be around 5V and turn on would be 12V for the output I can go about that.
Tried of looking at the projector case in my closet and my color...Leave a comment:
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Re: Infocus power supply isssue
And it did what I knew what was going to happen, a dead short because the pins are now reversed.Leave a comment:
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Re: Infocus power supply isssue
Happy now?...Leave a comment:
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Re: Infocus power supply isssue
So I want to ask you when I do it your way (throwing out the way Infocus did it) and it blows then what do I do? Why do you think I brought two of them
btw I had the same voltages as I did before with the original....Leave a comment:
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Re: Infocus power supply isssue
What the replacement looked like...
and the original with it's machine bent legs.....Leave a comment:
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Re: Infocus power supply isssue
The pins are not twisted it's just how it is, I did not bend the pins in the same way the original was.
And for the info it still gets as hot as the original did.
And if you saw I blew the fuse because I used my oscilloscope on the MAIN input, had I used a isolation transformer I would had no had the issue, if you think it's not true wait until my replacement fuse comes in.Last edited by subarub4; 05-28-2013, 08:20 AM.Leave a comment:
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Re: Infocus power supply isssue
underside looks a little rough with all the flux.....Leave a comment:
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Re: Infocus power supply isssue
lol ok then just making sure, the fuse is ok and I don't see a short.Leave a comment:
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Re: Infocus power supply isssue
Found memory card for macro camera....Leave a comment:
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Re: Infocus power supply isssue
Are you talking about the short one next to the TO-220? That's a brand new cap btw....Leave a comment:
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Re: Infocus power supply isssue
The fuse blew because I did no use a isolation transformer when I was checking with the oscilloscope.
I can try and get some pictures of that area, I wont be able to get macro since my memory card is lost..
I will check the resistance.
[url]http://www.youtube.com/watch?v=ERnUtMeWH4w&feature=youtu.be[/url]Re: Infocus power supply isssue<br /... of that area,...Last edited by subarub4; 05-26-2013, 09:34 PM.Leave a comment:
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Re: Infocus power supply isssue
Is there a reason why I'm not getting a reading with the way shown in the link above?
*edit ok it has a diode but the finger test does not work it pretty much stays at the same reading.Last edited by subarub4; 05-26-2013, 04:48 PM.Leave a comment:
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Re: Infocus power supply isssue
Hmm.. I'm looking at a FET here.. it's part number K20A60U Can anyone confirm that's a Toshiba FET?
I took it out of circuit and I can't get the gate to open, my meter puts out 1.5V in diode test
I followed this which I used in the past to find two Mosfets that were shorted.
[url]http://www.4qdtec.com/mostest.html[/url]Re: Infocus power supply isssue<br /...it and I can'tLeave a comment:
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Re: Infocus power supply isssue
Blew the fuse.. 250V 6.3A ratedLeave a comment:
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Re: Infocus power supply isssue
I want to know this has me curious how much AC should I be seeing near the standby power area?Leave a comment:
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