CRT, LCD, Video Inputs, Lightgun HD and More Guides

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CRTGAMER
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Re: CRT vs LCD, Video Inputs, Lightguns on HD and More Guides

Post by CRTGAMER »

AppleQueso wrote:those pins are unsoldered because they don't actually connect to anything. There's nothing to worry about with those.

I think one other pin on one of the two IC's doesn't actually make a connection either. I think it's pin 18 on one of them. That one IS soldered for whatever reason, but either way it doesn't really matter too much, kind of irrelevant info really.

It's not as hard as it looks to replace them. Too bad in my case it turned out that those IC's weren't my problem. (Pretty sure my problem was/is actually the flyback transformer. It'd cost way too much to replace that).

Make sure when you remove them, you do a good job desoldering them. Your only real worries replacing them should be accidentally damaging the PCB traces, which are quite fixable if you're in a pinch anyhow.
Meh, I'll just leave it on. I would hate moving the 200 pounds, disconnecting the eight rear inputs and risk a solder job that may not even work. The cable box keeps the tube at a very dim at night black screen. During the day you can't tell its on until the cable box or a game console is fired up. If the HD will never turned on again say from a power fail then I'll go the desolder and solder new chip route.

Wegas seem to have this power supply problem. Though uncommon, I found multiple sites pointing to the chips. If you get the flashing six or seven light, it could be the ICs. Unplug for a few hours and then try the hair dryer trick.

The chips are under twenty bucks shipped, I should pick them up as a backup plan along with a couple sockets.
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AppleQueso

Re: CRT vs LCD, Video Inputs, Lightguns on HD and More Guides

Post by AppleQueso »

From everything I've read, if you're having to use the hairdryer trick then it's only a matter of time. I suggest buying those chips and being ready to replace them when the time comes.
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Re: CRT vs LCD, Video Inputs, Lightguns on HD and More Guides

Post by elmagicochrisg »

AppleQueso wrote:From everything I've read, if you're having to use the hairdryer trick then it's only a matter of time. I suggest buying those chips and being ready to replace them when the time comes.
Don't wait. Just buy those chips and replace them. I don't see how you could do anything wrong even with little soldering experience, as long as you take your time. Replace them and get it over with...

A few tips. Use a desoldering pump to desolder the old chips. Even a cheap one should work just fine. If you have any trouble getting all the solder off, just put a little blob of extra solder on top of the contacts you want to desolder first. The extra solder will help suck away the original solder making for cleaner contacts afterwards. Use solder with lead. If you can't find any locally, just import some from China. There's enough of that on eBay. Don't solder too many contacts in a short time. Solder one contact, then let it cool down before you solder the next contact. Don't heat a contact point for too long either. You don't want to ruin the new chips you bought. Watch a few 'how to' videos on youtube before you start soldering. There's some great info in some of those vids. And last but not least, if you have some junk components lying around, try soldering / desoldering on them first...

Have fun... 8)
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Re: CRT, LCD, Video Inputs, Lightgun HD - Wega Repair Guide Soon

Post by CRTGAMER »

Sony Wega Landfill Prevention Kit

The chips came in, guess what I'm doing soon. A couple last chances with the unplug and hairdryer trick then the Wega is coming apart. Seems to be a problem on a lot of Wegas, a shame since so many get tossed over the inexpensive DIY repair. I'll post a guide once I get this done, probably tackle the repair next Monday. :D
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Re: CRT, LCD, Video Inputs, Lightgun HD - Wega Repair Guide Soon

Post by CRTGAMER »

KV32HS500 Sony Wega HD CRT 4:3
D Board Two Chips - A Board No Chips


No luck on the powering up the TV after sitting for a couple of days unplugged, so the Repair is a go. I had my neighbor give me a hand moving the HD Tube, 200 freeken pounds! I staged a dresser in front of the wall unit, lucky a very close matched height. Slid the TV out and disconnected the eight inputs and audio out to the receiver. Wrapped tape around each cable bundle and labeled to avoid guesstimating later which cable goes where. A wide mix of DVI converted to HDMI, Composite, SVideo and Component hooked up to various Game Consoles, Laser, DVD, CED and VHS. Even a couple RF inputs for Analog portion of the Digital HDMI cable box and Atari 5200.
New HDs no longer have SVideo. Component also seems to be going away, most only have one input. HDMI taking over, seen a lot of newer HDs with four HDMI inputs.
My fireplace has a nice 13 inch step, so we spun the HD around and set it there. Even though the TV is bigger in depth, most of the weight is at the tube. I plan on pulling the PCB after letting it sit over the weekend for discharge. No way will I try to discharge with a screwdriver and risk damaging any capacitor from the surge.

I pulled the back cover off and confirmed both chips are the older MCZ3001D chips and soldered in. Took the cover outside and brushed off all the dust, will do the PCB after the discharge wait session. I checked that I can moved the PCB back slightly by releasing the latch then pushed forward again. The A Board has no Chip so there is only the two on the D Board to worry about.

Looks tight but does the black plastic for various inputs need to be removed? :?

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Now the trick is to be patient and let her sit for a couple of days. Cover temporarily back in place so my pet cat won't get curious and get fried.

There was talk about the IC sockets might be unreliable due to high voltage. The voltage and amp draw can't be that high for the chips, seems the contacts and legs could handle it. Because of some owners having to do the repair a second time, I am definitely going with sockets.

The D Board two chips are the most common fail on Wega TVs.

I'll post my results. If successful I'll write an entire Guide, maybe also make a one page word document attachment. An easy printout to pass on to the local Thrift Stores keeping the WEGA CRT around as long as possible. :D
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Re: CRT, LCD, Video Inputs, Lightgun HD - Wega Repair Guide Soon

Post by AppleQueso »

The WEGA's discharge themselves pretty quickly after unplugging them actually. They're actually safe to work on after waiting only a few minutes. I know this from experience and all blah blah. I can understand being better safe than sorry though so yeah.

Hopefully this repair goes well for you. I've still got a giant paperweight on my hands.
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Re: CRT, LCD, Video Inputs, Lightgun HD - Wega Fixed, Guide Soon

Post by CRTGAMER »

KV32HS500 Sony Wega HD CRT 4:3
D Board Two Chips - A Board No Chips


Dusted out everything inside with a soft brush today. The plugs and PCB were actually a breeze to remove. I left the Flyback Transformer and power lead from the PCB to the back of the tube attached. Got the old chips desoldered and soldered in the new IC sockets, then plugged in the replacement revision B chips. Plugged in and heard the TV fire up. The tube is still facing the fire place door so I'll have to wait till I can spin it around to confirm. Tomorrow, my neighbor will help me lift the 200 pound monster back in place. Optimistic this baby will work, I'll write a complete guide once everything is done. :mrgreen:

For now enjoy a few pics, where's Waldo and find the crappy chips. :D
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Re: CRT, LCD, Video Inputs, Lightgun HD - Wega Fixed, Guide Soon

Post by wip3outguy7 »

crosses fingers
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Re: CRT, LCD, Video Inputs, Lightgun HD - Wega Fixed, Guide Soon

Post by elmagicochrisg »

You go boy... :P
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Re: WEGA HD CRT FIXED! - CRT, LCD, Video Inputs, Lightgun HD

Post by CRTGAMER »

KV32HS500 Sony Wega HD CRT 4:3
D Board Two Chips - A Board No Chips

wip3outguy7 wrote:crosses fingers
elmagicochrisg wrote:You go boy... :P
Thanks for the support, I am happy to post:

SONY WEGA HD CRT IS FIXED! :mrgreen: :mrgreen: :mrgreen:

A lot of gaming catchup last night, had to get my fix after no console gaming for a week!

When I plugged the HDTV back in, it worked beautiful! I really want to keep this rare TV running as long as possible. Not only because it is a beautiful CRT but a HD CRT 4:3. The best TV for Retro consoles! 8)

A shame so many WEGA Trinitron TVs get tossed because of the chips failing. Expensive to get repaired at a Service Center, but inexpensive for the DIY repair. The two chips are under twenty bucks shipped, though it is a meticulous repair. :mrgreen:

Guide forthcoming, meanwhile some more pics. Note the IC sockets soldered in, one chip not placed yet. Also note the date on the Wii screen displaying July 18th, it is the week of date. I took the pic yesterday on July 20th. :D
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