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Post by jeremy on Dec 14, 2016 20:28:41 GMT -5
MT, That worked (sort of),
The projector powered on and stayed on the first time I turned it on after shorting pins 1 & 2 out on IC102. I didn't have a lamp in it so I unplugged it and put a lamp in and tried it again, 2nd time it powered on for a bit, then went off again, and just pulses the standby light every second until I unplug it, which it is doing as a norm now.
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Post by jeremy on Dec 14, 2016 13:30:49 GMT -5
MT, Here's a pic of the bottom of the PSU (where we're working), the schematic for this PSU is deplorable since it suggests PC102 is in 2 areas...? Maybe this photo will help
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Post by jeremy on Dec 14, 2016 13:17:45 GMT -5
Just to be clear MT, you want me to short Pins 1 and 2 on IC102 correct?
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Post by jeremy on Dec 14, 2016 11:55:21 GMT -5
Well I'm certainly one for camping out aren't I? Sorry I haven't gotten back to this MT, I had 4 other projectors that I had to get repaired, so I didn't have time to get to this one. A couple of them had blown PSU, ballast, and PSU Filter boards (lotta blown parts basically). Anyway, back to this projector. I finally have time today to work on it, so I'll get that done what you suggested last, and see what I find!
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Post by jeremy on Dec 6, 2016 12:21:28 GMT -5
I'll try that in a couple hours MT, I'm working on an Eiki that the rear-end was smashed up on, after I get it off the bench I can get to the Hitachi again
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Post by jeremy on Dec 5, 2016 22:05:48 GMT -5
I figured it would be easier/best to test all the boards to make sure I get the right one so I don't end up spending a lot of time on a board thats not even faulty
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Post by jeremy on Dec 5, 2016 22:03:59 GMT -5
Oh yeah, I did try the original ballast with the good PSU and it worked fine, so I don't believe the ballast is at fault.
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Post by jeremy on Dec 5, 2016 21:35:44 GMT -5
IC 101 part number is: 1D13701 Then below that number is 5551A
IC 102 part number is: 2A13017 Then below that number is 5527
Sorry it took a while... but there's a heatsink on the bottom of this PSU and it was in the way, and some desoldering needed to be done.
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Post by jeremy on Dec 5, 2016 3:33:30 GMT -5
I have tested the voltages yes, though I was only able to test in standby as it doesn't stay on long enough for my meter to get an accurate reading while on. I put the voltages I read in the photo attached below: They all read what the SM says they should be.
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Post by jeremy on Dec 4, 2016 21:54:21 GMT -5
Oh, so you have verified it is definitely the power supply board? Yep, I also put fresh new capacitors in the non working one while it was out to eliminate them as the issue and thats as far as I have gone.
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Post by jeremy on Dec 4, 2016 12:06:58 GMT -5
Unfortunately none of those issues on page 35 or 36 describe the exact issue I'm having with this projector. When it is plugged in, in standby (orange power LED and thats all thats lit), if power is pressed, the power LED lights green for a second or 2 and then the projector fans make a quick spin-up noise, then the whole thing shuts down, the power LED blinks orange twice, stops, blinks twice more, and is in standby/ready state again.
The way the LED blinks before power on, and after the failure, is normal, so they don't really tell me anything. I can however leave the projector in standby, plug a network cable in, and navigate the web interface the projector has. If I try to power on the projector the web page freezes and the projector powers up and shuts down as it would if I pressed the actual power button.
All settings are on default as well, so I know its not the mainboard. I also know its not the mainboard, as I have a working one of these. I swapped the PSU from the good one to this one and this one worked the way it should, and the good PJ used with the PSU from this PJ did not work, so I know its the PSU.
Anyway, as I mentioned above, LED's don't act abnormal, and none of those conditions describe the projectors behavior. :\
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Post by jeremy on Dec 1, 2016 13:57:41 GMT -5
So I have this hitachi WX4021N, and another hitachi (WX3015WN) and they both have the same problem. When you plug them in, the power LED blinks a couple times as normal before going to standby/ready. When you press power, the power LED turns green for a second or 2 at most, the projector powers up for about as long, and then shuts off, the power LED then blinks as it did when first plugged in, and is back in the standby state. Pressing power again repeats this endless cycle. The one I'm concerned about is the WX4021N, as I have the full service manual for it with the schematics for the PSU. I found a cracked solder joint on the 450v 4.7uf capacitor, which I replaced, as well as replaced the rest of the capacitors on the PSU with new ones just to eliminate them as a possibility right away. The cracked solder joint nor the capacitors were the issue, I did some quick checks of some of the IC's and transistors and they appeared to be fine. I haven't done any voltage checks yet, but then I just got the SM myself before I started this thread. The service manual can be found on ET (I cant attach it as it's too big), any help on where to go from here would be appreciated
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Post by jeremy on Dec 1, 2016 13:41:22 GMT -5
Just thought I'd update this thread, I did manage to repair the projector. It was a thermal sensor by an intake fan near the lens/DMD assembly (thankfully). This DLP projector is horrible to tear down, so luckily the thermal sensor that went out was in a somewhat easy to get to area. Pulled it out, put a new one in, and it works perfect Anyone else that has this projector, if you are a novice at servicing projectors or electronics in general, or never have in the first place, I do NOT recommend servicing this machine by yourself. It is a very complex projector to tear down, diagnose, repair, reassemble. There are hundreds of screws and almost as many parts. Take it to someone who knows how to service projectors of this level if at all possible, otherwise you risk damaging or incorrectly assembling the projector if you attempt to DIY.
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Post by jeremy on Aug 17, 2016 11:10:21 GMT -5
I would recommend reading my VPL-VW10/11/12HT thread here in the digital projector forum. You likely need to recap your power supply as these Sony projectors are over 11 years old now, and the capacitors are beginning to lose their ability to charge/hold the charge. The power supply in your projector is identical to the one I repaired. See thread here: repairalmostanything.com/thread/95/vw10ht-vw11ht-vw12ht-garbled-videoYour projector may be working now, but I wouldn't bet on it staying that way without refurbishing the power supply. Best of luck, and enjoy the projector!
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Post by jeremy on Aug 2, 2016 9:19:05 GMT -5
I've got a Yamaha B-2 100wpc power amplifier that came in a few weeks ago. I finally got around to it this weekend to see what the issue with it was. It appears that someone damaged the speaker selector board in the amp, as the circuit board is completely cracked in half, and then poorly glued back together and wires jumping the broken foils. The 4 mechanical buttons on the board are also shot, loose and sloppy, and bent. So, the amp doesn't really work as a result... I am wondering if anyone knows where I could get new, better quality buttons, as well as possibly getting a new PCB made up to replace the cracked one. It's a small board and rather simple so it wouldn't be hard to make a new one for those who have the ability. Any suggestions & help would be appreciated, the amp is in minty condition and weighs 60+ pounds (which I find a bit crazy for 100 watts per channel in a 2 channel amp, but hey whatever, lol) I would love to get it repaired, I have the matching C-2 preamp for it as well so getting the amp going would make this a nice little setup! Pics below of the damage (button damage may not be visible at the angles the pics were taken)
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