Start from one end and measure each pin, write down what each one measures
and repost it to this forum. We then can assist with a bit more info. BTW
have seen many of these tuners just flat out fail, but become quite falkey
first.
"Mike" wrote in message
. ..
I dont have the pinouts of the tuner, so i cant test for voltages.


Whats funny about this whole situation is the tuner DOES come in enough so
you can actually watch the channel. But why wont autoscan pick up
anything?


"Art" wrote in message
. ..
Have you tried heating or cooling the physical tuner assembly? If so what
effect was noted? Does the tuner react to physical tapping on it with a
non-conductive item? Possible the actual tuner is defective. Measure the
other voltages at the tuner assembly afc, B+, etc.
"Mike" wrote in message
. ..
I have a PTK169 that has some serious tuner problems. Im wondering if the
tuner is bad or not.

if you manually use the remote to put in the channel, the channel will
come in on either A or B, but is very snowy on the lower end. upper end
is slightly snowy.

When you try to do a autoprogram, it will set the tuner to A and air
from cable.

and the only channel that programs in is 91. the rest are rejected. If
manually tuned, its ok.

I read somewhere that C4143k will leak and damage traces, so i pulled
the cap, and see no damage or leakage. I replaced it anyway, with
absolutely no change.

I checked the 33V test point, and it shows 33.2v.

any ideas?