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How to confirm a TV tuner is at fault?
re Teac TV ctm687 This is further to my previous post 17/7/2005.
After performing many tests on the circuit I find the AGC voltage to be higher (7.84) than it is required at I/C TDA8305A (3.9). I am not sure what other things to try before actually desoldering the tuner. If I can obtain the schematic of the tuner which shows what voltages to expect at it's outputs and these match the readings I measure on the tuner whilst still connected to the circuit board, will this confirm the tuner being faulty? Any thoughts on this? Thank you Al |
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