CurtPalme.com Home Theater Forum

Sunshinehere · Posted: Tue Oct 22, 2013 2:51 pm Post subject:

Are you telling me I should actively pursue a divorce to satisfy unconscious projector lusts ?
I'll ask my wife's opinion Wink

You guys are killing me... Cool

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

No, im not saying that, others might, but i wont.

You should never have gotten married in the first place, thats what ill say Wink

Sunshinehere · Posted: Tue Oct 22, 2013 4:09 pm Post subject:

Hahaha.I'll think about your statement Very Happy

If those PJs only had a higher Wife-Acceptance-Factor.....

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

Doesnt matter to me, i dont have a wife!! Hahaha!!

hansilili · Joined: 09 Mar 2007 Posts: 302 Location: Köln, Germany

Back on topic:

I tetsed this projector yesterday an it behaves as described in the first post. But the LED don't light simultaneously, horizontal def LED is first followed by vertical def LED and the the unit shuts Down.

I remember having that before and it was easy to track. UNfortunately I don't remember what it was, probably a shortet 15 V to ground that happened in course of the air fan replacements. As Thomas PG tripped in normal service, the short could be much harder to locate.

Say again what happens if the HOT is blown (two years ago since it last happened to me)? I did not yet measure the resistance of the HOT but that would be easy to replace.

gjaky · Joined: 05 Jun 2010 Posts: 2802 Location: Budapest, Hungary

A shorted HOT usually causes an "FC" error, and only the H-deflection LED is on, right from the power on command. As for the measurement of the HOT, don't be affraid if you measure only a few Ohms between the base and the emitter, that's normal. Between the collector and emitter you should measure a diode in one direction and open in the other.

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

Shuts down with no code?

**Curt Palme** · Posted: Thu Oct 24, 2013 2:17 am Post subject:

Measure the 3 pin power connector at the middle top of the board. One pin should have 50-100 volts on it which feeds the HOT. if you don't have that, then either the HOT is shorted, or the power supply is bad.

hansilili · Joined: 09 Mar 2007 Posts: 302 Location: Köln, Germany

It was the HOT. Replaced it for a new one, job done!

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

You used the original type?

hansilili · Joined: 09 Mar 2007 Posts: 302 Location: Köln, Germany

No, it is the 2SC5570 or 2SC5047, need to look it up when I'm back home. However, this typ has been runningfine in the 10PGplus with maxed width for two years no.

hansilili

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

Hmmm, ok, your call on that one Wink

Im only going on the MANY times its been very firmly advised against use of a substitute part.

hansilili · Joined: 09 Mar 2007 Posts: 302 Location: Köln, Germany

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

In this case, id say it was more than amateur advice Wink

It may run for a while, maybe even years!!

Replace all the capacitors is some pretty damn good advice for these, they are known for having defective ones, and unless you have tested them all to confirm otherwise, I doubt youll be the first that never has to do it Laughing

hansilili · Joined: 09 Mar 2007 Posts: 302 Location: Köln, Germany

http://www.avsforum.com/t/340604/nec-h-output-transistor-warning#post_3088215

Check this, there is more to find about the specs on German boards. But I also know the bad experience of Mark_A_W, who helped me big time elsewhere.

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

I will read that soon, thanks mate Wink

I have to be up at 5am to go and do a swimming test, have to swim 100 meters with long pants and a shirt on...

**Curt Palme** · Posted: Fri Oct 25, 2013 12:17 pm Post subject:

Ah, I see you're planning to come to Canada to do some ice fishing, and are practicing for if you fall through the ice? Smile

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

Haha!! Not quite, its for a job application Smile

hansilili · Joined: 09 Mar 2007 Posts: 302 Location: Köln, Germany

Okay, the German wisecrack learned better..

So actually the 2SC5047 did last for 2 - 3 minutes (PG9+ Def boars running n my 10PG+). Then the projector shut down with the same symtoms as decribed in post 1 by Thomas. So I unsoldered an original Toshiba 4288a from another working spare Def board and put it on Thomas board. This time the HOT didn't even last for 2 minutes. But, me sh*thead had forgotten to put in the screw to attach the transistor to the heatsink Embarassed

Two new 2SC4288a are underway, due to arrive Thursday or so. Then we will see if the prob was really the HOT or is sitting elsewhere on the board.

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

HOT by title, and HOT by nature Wink

And thats twice now Laughing