Sony 1031 QM Turns Off After 2 Seconds - AVS Forum
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post #1 of 9 Old 05-06-2014, 05:13 AM - Thread Starter
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Hi all, Sadly my projector is not doing so well.

I have read a heap of threads on the forums and decided this would be the place that would have an answer if one existed still.

 

As per the topic, I have a Sony 1031 QM.

I was adding an RBG (via the 9pin VGA) tonight and had it working great... Aside from the vertical scrolling.

I turned it off to have dinner and came back to a now non-functional projector.

 

It will power on for 2 seconds (green light), then flashes the hi-scan light and goes out.

This is with nothing attached to it now at all.

 

Pulled it from the roof and removed the covers and the only other thing I notice is the red protection LED (I think it is anyway) in the front corner comes on and it shuts down.

 

Anyway, any help appreciated.

 

Thanks

Pete

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post #2 of 9 Old 05-06-2014, 11:20 AM
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the 1031Q can do 480P and if you really flog it I think someone 10 years ago got one to to like 540P, that was back when the machines were just old. now you machine is 30 years old , which is electronically ancient, and parts will be failing on it regularly. Curt Palme, the last CRT repair guy on the planet chucked all his 10XX Series parts a while ago and has even cleared out all his parts for much better machines.
More importantly, people are giving away better machines than this, like 10 times better, every day on CL. Look for an electrohome marquee, Sony G70, or NEC XG and you can do 720P, 1080i, or higher and even watch a normal size screen with some lights on if you wish. Post back what's available on your local CL and we'll give your our 3 cents worth smile.gif

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post #3 of 9 Old 05-06-2014, 04:30 PM - Thread Starter
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Sounds like a plan.

The 1031 was my introduction to CRT's and has a sentimental value attached to it.

 

It was due to be upgraded and retired, but so am I if you ask my wife ;O)

 

Thanks for the input and I will hunt for a G70.

 

Pete

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post #4 of 9 Old 05-07-2014, 01:23 AM - Thread Starter
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Well long day and not a lot to do when you work nights, so I ripped the old girl to bits (not really) but went looking for the problem just to get closure on it.

 

Turns out it was the 2 transistors on the GA power board (2SC3163) shorted out.

 

Posting this up for reference in case someone, someday comes across the same issue.

With that in mind, these old IC's are rare as chickens teeth (well at least in Australia)

 

Pete 

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post #5 of 9 Old 05-07-2014, 10:57 AM
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oh your Down there smile.gif yeah they're not easy to find and one guy just got burned and bought an XG with absolutely roasted tubes. Good thing you can diagnose/repair. Rare for transistors to fail but 30 years is a long time.
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post #6 of 9 Old 05-07-2014, 11:25 AM - Thread Starter
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It was actually due to years of LCD repairs I even looked there.

The Benq LCD monitors of old had a serious issue with (wait for it) 2SC5707 transistors in the inverter circuit.

 

After I found the 2SC's in this they instantly became suspect #1.

Another note for those playing at home, always replace these in pairs.

 

I just scored a few off Ebay and will get this old girl running again until I can find something else.

As you have now noted, I am indeed down there where most of the planet seems to think we have just gotten electricity.

 

From an electronics perspective - this place may as well be the Bermuda triangle.

 

 

Edit: Just a quick note regarding CL, we have no one in any hurry to give away CRT projectors here in the land of OZ.

down here the going rates for even 10xx series is still a couple of hundred $$.

 

I have read several posts over at Curt's site about free G70's etc - that will NEVER happen here and I (and the rest of OZ) look on with extreme envy.

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post #7 of 9 Old 05-11-2014, 11:32 AM
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Quote:
Originally Posted by PeterThompson View Post

I have read several posts over at Curt's site about free G70's etc - that will NEVER happen here and I (and the rest of OZ) look on with extreme envy.
I am sorry to hear it , and to think that I've seen people here trash perfectly working 8 inch LC machines with clean tubes is such a huge waste. Too bad there isn't way to get that stuff down there easily without the huge hassle of freight and customs costs.

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post #8 of 9 Old 05-11-2014, 06:26 PM
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Hey Peter, while going through 'junque' and clearing out my shop last week, I found one of those really hard to get 25 pin to RGBs cables for the 10XX series. yours for the cost of shipping if you want it, if you get that 1031 going. Should be about $10-15 to ship in a small box. Email me through the sites below. It's about 6" long or so, BNC female ends.

thanks!
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post #9 of 9 Old 05-11-2014, 10:29 PM - Thread Starter
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draganm: Not a lot we can do about the location. My wife has no idea why living here is so damn frustrating. On another level, it's home ;O)

 

We get it bad, the guys next door in NZ get it even worse.

 

Curt: Thank you for the offer. I just found a Gefen HDMI-composite scaler here and am working with it using an old VPH-1001QM I found. Cables with a schematic I could build in a few minutes, pending any custom chips being included.

I will get back to you about the cable as soon as these 2SC's arrive and are fitted. It is the only fault in the PSU I could see, so here's hoping.

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