BL_Thompson
TV Repair Authority
Feb 7, 2003, 9:29 PM
Post #3 of 8
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Re: [Philip] Toshiba 1400 TB Blue Screen
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Philip, is this an older TV? Most modern tuners are digital, although they may still have tuning voltage and band switching pins. Look for pins labeled data, clock, CE, etc. If these pins exist on your tuner, all you have to do is confirm B+ and eliminate any rf input problems to determine that you have a bad tuner (which is what I suspect). On rare occasions, there are other problems related to IF or tuner control. If you want to be as sure as possible, and you have access to an oscilloscope, check for activity on the data & clock lines... you may have to change channels to initiate a data transfer. If you confirm a bad tuner, I recommend PTS as opposed to new replacement. BLT ----------------------- Bryan Thompson Spyder Byte Services Albuquerque, NM
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