"Laird Tom N" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- I replaced the PTO bulb last night in my TR-7 which constitutes removal of the DR-7 (unless someone knows an easier way?). Removal is somewhat delicate. You need to unplug all the surrounding connectors, remove the braided wire, and the single machine screw near the center of the board. The hard part is lifting the connectors EVENLY to avoid bending the board. I had a piece old copper 12ga. house wire that I bent the end (J-hook) and used that to snake under the edge of the board next to the press-in connectors and; as evenly as I could, leverage up the board. It worked, but be careful - there is another connector near the middle of the board the that you will have to grab the board edges and wiggle it up and out. BTW, the display is part of the board and does not need to be removed, seperately.
Re-installation isn't any easier. Getting the display "rocked" in first and then trying to line the pins up on the bottom side (when you can't see them anyway) is a real chore. The re-installation process depends entirely upon you removing (see paragraph above) it straight up without bending any pins!!! As for the problem below, I would suspect one of two things. A possible crack in the board upon removal (could be a weak solder joint on one of the pin connectors). Or, a bent or mis-aligned press in connector pin on the bottom. Just my 2 cents worth..... BTW, the bulbs are #53's (14 volt) the one that was in mine and burnt out was a #47 (6 volt). Tom Laird W9QI Moline, IL. -----Original Message----- Any input on this tr7 problem will be greatly appreciated: I have a TR7 which has been gone through and realigned etc. Upon removal of the DR7 board and installation of N9OO's blue LEDs - very nice - I reinstalled the DR7. Following this reinstallation, I now have several symptoms. 1. Reduced sensitivity, S9 signals now S4 2. Loss of proper filter bandwidths 3. All usb signals readable on usb, lsb and cw mode. 4. Freq. display correct on lower portion of bands flipping to incorrect freq. as tun PTO upward. For instance, in the 3.5 position, the freq. display is correct from 3500 up to about 3750, then flips to 32??, then flips to 14??? etc. as continue to tune upward with PTO. These symptoms have continued through several uninstalls and inspections, and reinstalls. And through the install of a different DR7 board. Something beside the DR7 board has gone haywire. I have inspected the connectors, solder joints, plugs, etc. numerous times and still no joy. The unit was functioning nicely before the DR7 uninstall. ------------------------------------------------------------------------ -------------------------- Is it possible that you accidentally bumped one or more of the adjustment pots on the DC-DC converter supply board in the front right corner of the rig? It's so easy to do when messing with the DR7 that it ain't even funny. ---------------------------------------------------------------------- Submissions: drakelist@www.zerobeat.net Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net ----------------------------------------------------------------------
