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RCA R52WM24 ITC222 Dead Set / 3 Strikes - Information wanted    
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Jrat



Joined: 21 Jun 2009
Posts: 9
Location: Brighton, MI

PostPosted: Sun Jun 21, 2009 1:48 pm    Post subject: RCA R52WM24 ITC222 Dead Set / 3 Strikes - Information wanted Reply with quote

I picked this up a couple weeks back, being told it had a convergence problem, but powered up fine. Unfortunately, it doesn't.

No visually bad caps. Fuses are all good. HV seems to come up just fine. I've gone through everything I could find online for common fixes, troubleshooting, and whatnot; including reflowing the flyback and HOT. I haven't yet reflowed the small signal board connectors, but will be getting to that today.

I don't have, or have access to a Chipper Check, so I went ahead and dumped the contents of the eeproms manually through direct serial connection/soldering to the eeprom pins. I'm after the error codes stored in there. My first question is, is there a listing of where the codes are stored within or any info on how they are stored? Something like the INIT directory files that come packed with chipper - which list the hex locations/values for individual tv settings.

I'd also like to know if anyone could be bothered, if possible, to send me over some other eeprom dumps from this chassis, so that I can compare and check for possible corruption.

Last thing, does anyone have schematics for this set? I hate to be a beggar, but I just don't have $40 to fork over for the service cd. Razz

Thanks tons for any help anyone may have for me.
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Jrat



Joined: 21 Jun 2009
Posts: 9
Location: Brighton, MI

PostPosted: Sun Jun 21, 2009 8:40 pm    Post subject: Reply with quote

I reflowed the small signal board connectors as suggested by some folks, which made no difference.

Push power, HV kicks on after a moment, I hear the speakers power up. A second or two later I can hear the crackling of the CRTs. A couple seconds pass, and the cycle repeats.

One of the eeprom images does appear that it may be corrupt, after viewing in a hex editor. It just doesn't look typical of any binary/hex I've seen previously; but I'm surely no expert. I dumped each eeprom multiple times to help ensure accurate data.

Another two eeprom images appear to contain identical information. I found five eeprom ICs total.
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