IF filter issues were a problem a few years ago. The big three, Icom, Kenwood and Yaesu all had failing 450 khz and 455 khz ceramic filters. There are more than a few web pages that go into detail why they failed. Yaesu's part number for both the wide and narrow filters now have an "A" suffix. The replacement cost per filters for the FT-1900 as of June 2014 were a whopping $0.61 each directly from Yaesu.
Yaesu parts can be reached at 714-827-7600.
The factory part numbers to ask for are H3900572A and H3900573A. The industry part numbers are LTM450FW-A and LTM450GW-A

Below are a few pictures showing the replacement of both filters within the Yaesu FT-1900.
Clicking on any pic will bring up a larger image.

After removing the lid. The internal speaker is first to get removed. It sits inside the circle bushing in the center of the picture. It's wired with a small white two pin connector. Remove the connector and put the speaker aside somewhere safe. Get busy with a #2 phillips. Take all the screws out. including the two holding the power amplifier module. DONT forget the two screws on the rear that hold the SO-239 in place. The rigid ribbon cable for the control unit must be tugged straight up and out of its connector. This picture was taken AFTER the filters were replaced....

The SO-239 must be unsoldered to get the board out of the rig. The "NO Lead" solder can be a PITA just be careful.

This is what you should end up with if all has gone well!

Here is a zoom of the replaced filter's pads. I have to say that the radio cannot cross the California border anymore, I used 60 40 leaded solder.... look how shiny the pads are!

These are the fuzzy little filters that were replaced. The "dust" isn't from my bench. When I opened the rig, the filters were covered in a white fuzz. Nothing else in the radio had the same appearance.

KB2UMJ at YAA Who Dot Com

June 2014