IC-751A RIT and TX problem - ModsAndRepairs Forum at eHam.net

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eHam.net Forum : ModsAndRepairs : IC-751A RIT and TX problem

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IC-751A RIT and TX problem	Reply
by HA5BZR on October 21, 2009	Mail this to a friend!
Dear Everybody! I have a old IC-751A transceiver.My problem:If I turn my transceiver on and push RIT button I can see always -9 on the RIT display(instead of 0.0).It is not normal,and no decimal point ,only -9,not -9.9 And the most interesting:If I set the RIT potmeter clockwise I can see -8, -7, -6 on the display,the value is decreasing with 1kHz step without decimal point,if I set the RIT potmeter counterclockwise I can see -5 -4 -3 ... also decreasing. Why? If I push CL button everything will be ok suddenly,because I can see 0.0 on the display,and of course if I set the RIT potmeter clockwise I can see 0.1 0.2 0.3 0.4 0.5 ... and if I set the RIT potmeter counterclockwise I see 0.4 0.3 0.2 0.1 0.0 -0.1 And TX button is also the same problem,If I set TX button I can see -9 on the display. I noticed that if I push RIT button , the display show -9(not correct) but the receiving frequency goes down -5kHz(not what main display shows),TX button also -5kHz in transmit.If I push CL buton everything is ok. My question:What causes this? The problem is on the RIT/TX panel? Do you have any good idea?What can I check? Thanks I Appriciate your help: Laszlo HA5BZR

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