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Ic 746 problem

I have an IC746 After a lightning storm the set went completely dead. As per articles in the internet about dead ic 746 I replaced ic151 and the set canme back to life.But now I find that only 1.8 to 7 Mhz and VHF work ok. But 10 to 50 Mhz does not work due to the ATU not tuning. The receiver side is ok. What else shud have burnt??
73s
nelson
e/mail
nelson4s7ne@hotmail.com

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SOURCE: Sony KV-35S42 35" keep blowing MX0841 and .1 fuse resistor

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its the problem of the frequency range its getting blocked  at particular location.these can be solved by two options 1)first try changing the location of the unit from one corner to another corner.that should help to catch the frequency again if its getting blocked at particular location.this happens many times.but if changing the locan does not make any difference.then  2) get checked that the antenna of the unit is not catching the required frequency for the unit.so change the antenna also connect this external antenna  as mentioned 50 ω (it comes wioth SMA Connector) that helps in catchinf the frequency. you will get this at radio shack website. this will help. ----------------------------- also in the unit there is a component which controls the frequency called microprocessor if that goes weak the unit slowly slowly stops receving the accurate signals and only the noise comes.so the micro processor in located internally in the left side.its a green and black colour mini chip circuit board.many times opening the unit and removing and cleaning the microprocessor and refitting it solves the problem but this is 50 --- 50 chance. this all has to be checked what mentioned. thank you for using fixya.

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