|
Have you resoldered all the tuner grounds? About 75% of the dead CTC177s I come across will come back to life after resoldering the tuner. If you do need to replace the EEPROMs, make sure you have everything you need to align the tuner before you do anything that will rewrite the EEPROM. If you don't have the service manual and tuner signal generator, you will need to salvage the alignment data from the EEPROM. This can be done by hot swapping the EEPROM after a good EEPROM is use to allow the set to start.
You won't get a usable set if you just program it with the default values. My advice (assuming they are all the same chassis) would be to buy one EEPROM to use as a source of the code and to allow you to start the sets to get the alignment data from each EEPROM before reprogramming them. They only cost a few $ from places like MCM.
|