IC-745 - No volume in CW nor RTTY

[Dale Paul]

I turned on my IC-745 this morning and noticed there was no volume in the CW and RTTY modes. I'm thinking a relay may be hung up some place. Has any body else experienced this?

[gnuuser]

it could be many things! Do you have volume control in voice modes?
could be a faulty switch, amplifier, relay, or output transformer
you might need an audio signal probe to find where its faulty!

[Dale Paul]

Yes, I have great volume control in all the other modes. Just no sound output in CW nor RTTY. I'm also suspecting a stuck relay. Thanks for the reply.

[brandon lind]

The few watt audio signals in a transceiver hardly require relays. I havent looked at that radios schematic, but doubt it uses one to switch the audio on or off.

I would start by plugging in a set of headphones to see if the RF end of the rig is operational and go from there. Maybe you have a dried up bypass capacitor or a bad crystal filter for those narrow modes.

[Dale Paul]

Found the problem - "Operator Error" The Pass Band Tuning and Filter Switch buttons inadvertently got turned on. I don't change these buttons often. The first thing to go with age is memory. Thanks every body for the tips.