Q1122 is a surface mount transistor (2SC1623) just above the relay. Q1118 is a DTC114TK, and it's on the bottom of the board just about underneath Q1122. It's also a surface mount.
Good luck, Art N3OY
-----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Tuesday, December 25, 2007 9:58 AM To: Art Goldman; [email protected] Subject: FT-847 Disaster
Many Thanks for all of the responses and Merry Christmas to all!
I have done some preliminary troubleshooting and have discovered the following...
The fuse and the electronic cap are fine. I get good voltage to one side of the relay, the relay coil appears to be energized but the 12 VDC stops at the relay. I did jumper the 12 volts to the other side of the relay and the display lights up and I hear noise from the speaker. But no frequency displayed.
This is as far as I've gotten. I did note on the schematic that the relay has two transistors (Q1118 & Q1122). Q1118 is labeled as H-V Protection on the block diagram. Both of these devices connect to the relay (FL1001). I've looked on both sides of the board and can't seem to locate these devices.
Regards, - Joe K7ZT