Hi Joe, 
Thanks for the wonderful info on your site, due to the info on your site I 
could repair my TS850SAT without any problem. 
The fault description concerning the ALC problem was 100% accurate, I 
experienced the same phenomenon. 
Replacing the board $10 sounds to be a option but reading the comments on your 
page make me decide to use a different approach. 
Joe you may place the following info on your Home page, it is the way I used 
to repair my 850. 
Before fiddling with the board I used a freeze spray in order to see if the 
board was faulty, and yes one drop of freeze cured the problem for about two 
minutes. 
So evidence and proof was there, next thing was repairing. 
 
We remove the RF board according your excellent description and found the 
faulty board. 
We bend the X5900-….. DC-DC converter board to the left so we had a better 
excess to the components surface. 
Actually the most suspicious part was or is the DIODE chip, but we did it the 
most reliable way. 
All SMD parts except for the resistors and capacitors where removed from the 
board and replaced by discrete components, the NPN transistors where replaced 
by BC547 and the PNP transistor by a BC557, the two diodes where replaced by 
two 1N4148 ordinary pin diodes. 
It all sounds drastic but it can be done in 30 minutes, it takes more time to 
remove and reinstall the RF board than replacing the parts. 
The above solution provide a long term solution as the original board may go 
wrong again. 
Soldering the discrete parts to the SMD board is not a issue there plenty room 
and space. 
So Joe I hope the info is relevant for you. 
 
Further, the ts850 is a excellent rig I run it with a lot of fun and pleasure. 
Again thanks for your info on your home page it really helped me, I hope you 
keep on placing TS850 issues on your page, it is the only way to keep those 
rig's in 100% operation. 
 
With regards, compliments and 73 
 
De PA5CA, 
 
Frans Schwartz, from the land of the tulips HI HI.