Question about Toshiba 50HX70 50" Rear Projection Television

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Service Mode I am just about ready to change my ic's for convergence problems. I heard that once I have changed them that I will need to enter service mode and adjust things from there. I have this television second hand so I have no idea how to enter service mode on it. Any ideas would be appreciated. Thanks.

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Re: Service Mode

JustinMan, if you use original IC`s (not the el-cheapo chinese copies) the odds are good you will need no or minor adjustments which don`t require the need to go into service mode which you really shouldn`t go into unless your experienced with tv repair, you should be able to order the serv. manual here, it will give you the parts list and set-up procedure, good luck, BMW Rider

Posted on Dec 28, 2007

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Try resoldering the pins on the ICs first. If that fails to resolve the problem, change the IC responsible for RED. You should be able to determine that from the service manual. In that area you should also see either fuses or low valued resistors that feed the STKs. Check those as well.

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Yes, it could be from the convergence amp having a loose connection. Big Screen tv's have problems with loose connection especially when moved or bumped. If you can take back off and find convergence amps then safely tap on ic's and see if it changes picture then it's maybe just aloose conn. If no change then you need to check resistors inline to red. At the most replace IC's these are the large STK's by a heatsink. Hope this helps!

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Well you need to get into your tv's service menu and service convergence mode. It's different for every tv. It means entering a code on the remote that opens up a secret menu for changing tv settings. Go to and buy the service manual for your set, you'll be glad you did.

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I have heard of a reset in the factory 2 position of the service menu. Click the button behind the little hole in the front panel a second time and it goes into 2nd service mode.

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I offer phone consultation, if you wish, to get it really good in there.

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did you change the resisters the same time as the ic? some have reported that they got generic IC (cheaper) and have failed.

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Replace STK convergence IC's w/OEM or better parts.Senior tech soldering ability needed. Ex==Steel jumper wires feeding b+ to conv. IC's need resolder to prevent call-back.Also, best re-alignment done in service mode==consult service literature.

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