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You have a convergence problem. The convergence ICs are basically amplifiers which take the information from the digital convergence box and make corrections to the specific color beams. They are run hard and over time and with heat dry out the heat sink compound and eventually overheat meaning you have no convergence correction. The solution is to replace the ICs. I have a tip at http://www.fixya.com/support/r4220499-change_projection_tv_convergence_ics which explains the process as well as tells you where to get the parts. There is also a link if your unit is a newer one which has the ITC222 chassis. You did not mention the model number.
Here's all I find regarding bad convergence from the techrepairCD: RCA ~ITC222 D52W20~Convergence bad~~~ITC222~Replace leaky DL032 on deflection board~~~~~~
RCA~D52W20Y ATC221~Convergence goes out/bowed after on for a few minutes~~~ATC221~Problem may be on the deflection board. Was unable to pinpoint where in this case.~~~~~~
RCA~D52W20BYX1 ITC222~Convergence way off after replacing small signal board~EEPROMS were transferred over to new board~~~IK210 was defective..transfer the new EEPROM back over.~Remember on these sets*when replacing the SSB* if there is a small P on corner of screen*hold volume on remote for 8 seconds after it reaches minimum.~~~~~
RCA~D52W20BYX1 ITC222~Can not align blue convergence* bottom really bowed* possibly either color after replacing SSB.(Or no auto convergence.~(Service menu: turn power off for 30 seconds* press vol dn and ch dn* simultaneously for 8 seconds* set turns on with service menu options)~~ITC222~In service menu* select convergence. If sensor calibration was performed when convergence was too far off* it will not alighn.~Get crosshatch with straight lines* perform sensor calibration* then attempt convergence alignment again. Be sure to store settings* then do sensor calibration again.~You must get a green flash of the screen after sensor cal and a check in the box. RED flash indicated convergence settings are too far off~~~~
RCA~D52W20BYX1 ITC222~no convergence correction~~~ITC222~LP650 (259271) DP670 (259246) & RP632 (259564) 4.7 3W on convergence power supply board~~~~~~
you will need to adjust the geometry and convergence defaults for both the 1080 and 480 seperately then save. You can get the CD called the ITC222 chassis convergence and alignment CD which shows how to do that from www.tvrepairworld.com
no the board that has the FL231 on is the ITC222 deflection board. The other board is above the chassis in a seperate frame that runs across the set the convergence power supply is the board on the left above the board where the fL231 is. Yes the ITC222 and ITC222A are the same chassis. As for the service manual that site should have the service manual under the thomson category as the ITC 222 chassis is actually a thomson chassis made for RCA.
the rca itc222 chasis uses no stk the convergence is controled with transistors... the convergence amp board is located above the main signal board(green board)... it can be identified as the one with several heat sink fins on it. FL231 is related to convergence.. there has been a problem with this fuse when it blows the processor doesnt know it is a projection set so it turns it into a regular tube tv. Here at the shop we have found number one reason this fuse blows is poor solder connection on the flyback. So replace the fuse and reflow the solder connection on the flyback and around that area also the horizontal transistor and then see if that doesnt fix the problem.. if you have an more trouble ..... email@example.com