TDS2022 repair

[mwbarth36]

Can anyone help with a problem I am having with a TDS2022 oscilloscope.  1.- Would like to have schematic, but that appears not to exist.  2.- I have traced the problem to a single chip.  It is labeled TT010 with 42K below that number.  It is a TI part.  I believe this to be a Flash Memory, but cannot find a data sheet.  It is a 24 pin surface mount part.  3.- If this is a Flash, does it contain any information for scope operation that would have to be programmed if it is replaced, or is it simply for storing waveform information from the use of the scope?  A data sheet for this part would help a lot.  Please, any information anyone has will be greatly appreciated!  A schematic would be fantastic!!

To give a further definition of the problem I am having: 

If I power on the scope at room temperature, nothing displays, front panel lights are on and backlight is on.  If I first heat the TT010 just a few degrees, then power the scope on, all is fine, it goes through the normal start up sequence with no errors, and it works perfectly.  Once running, I can cool the TT010 forever and it will not quit.  Once running it is just not sensitive to temperature.  Same if started in the 'non running' state, once started in that state no amount of heat will bring it into an operating state.  So, only the start up sequence is temperature sensitive.  I have tried re-soldering the pins of the TT010, it did not help.  Any thoughts or suggestions would be greatly appreciated. 

[shakalnokturn]

The fact that preheating the device has an effect on the scope starting normally or not very probably indicates that the unidentified part is bad. Still it would be worth checking at least supply voltages and ripple on this part.

For part identification a good overall photo and detailed photo of the part would help.
"010" would seem to be a 1Mbit memory but a 1Mbit device doesn't fit the 24pin count. A128kbit device would fit the pin count. 

[mwbarth36]

Thank you for your input!  I have done a bit more research.  Looking at the signals on the pins it has become obvious this chip is not a Flash memory.  When the scope is operational the eight microprocessor data lines are connected to this chip, but there are no other control lines present.  Turns out this chip is most probably a SN74TVC3010 used as a level converter for the 3.3 Volt microprocessor data lines to a standard 5 Volt logic used in the scopes add on features.  Just how this chip can prevent the proper start up of the scope when cool prior to power on is still a big mystery.  My next step will be to replace the TT010 chip as I can purchase the 74TVC3010 from several sources.