Suburban:
Once you replaced the EPROM you lost all of the tuner alignment parameters
in all of the televisions unless you read and save the data from each
television's old EPROM.
The first order of business after verifying your rework is to perform a 125
channel tuner alignment. A chipper checker and 125 channel television
signal generator would be most helpful at this point.
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
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"Suburban" wrote in message
...
This is a these are motel sets. I got 3 in, I resoldered all known
connections and replace the EPROM's, and all 3 Osc\mixer ICs.
The 2 in question came in for no channels from 2 to 50, after replacing
the parts and soldering, now the two have snowy pictures from 51 and
above.

I replaced U3201, Q7403, and U7301.
T checked R7121.

Any help I will thank you for in advance.

Ken Marshall
Suburban Electronics
PO Box 251
Hilliard, Oh 43026-0251