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all voltages are good on ic and transistors except tr 15. has signal on receive. it has modulation on transmit.
but at tr15 af preamp it should have
B 1.3
c 5.4
e .70
I get .02 on all on rx
on tx it is .17
any suggestions would be great
Thank-you for your time. Ended up being L 5 coil being bad. Replaced and went from -67 12 db sinad on am, to -108 @ 12 db sinad. And can now hear a tone down to -120 no problem.
reflowed d73 external speaker diode. reflowed header pins from face and on the board. and antenna input to the board traces checked no breaks. Still low recieve am and fm.
This is a 2970dx. Am and fm are low on recieve. am -88 dbm 30% modulation is as low as I can hear a tone. fm -90 dbm @ 3khz as low as I can hear a tone. This radio came from a radio shop estate sale. A repair guy that passed away. I replaced d34 just in case. Even though it was not cracked. I...
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