I cannot remember a lot of details for this receiver. I would look for an
"All Reset" at the rear of the set, or inside. Also, if this model has a
memory battery, many of the Sony's used some "AA" cells, remove these for
about 20 seconds.

If you can prove that the tuning encoder is working properly, the only thing
I can think of is that the IC's that process the tuning may be at fault.

You would really need the service manual for this set, to get in to it.
Maybe Sam's would be able to supply it for you. I would think it is too old
for Sony to have it any longer.

The only other problem I can see with this set, is to have parts. This will
be another issue for you. These Sony sets are very good, but Sony is not
very good for having parts for their older models. This is a big drawback
with this manufacture.

--

Jerry G.
==========================


"Nick" wrote in message
...
Greetings!

My cherished ICF-2001D has developed a fault that someone on this
group might have seen before and fixed.

Turning the Manual Tuning CW increments the frequency and display
normally

0.1 kHz LW,MW,SW
50 kHz FM

However turning it ACW does not decrement the frequency and display,
rather it increments it

0.7 kHz LW,MW,SW
350 kHz FM

When holding down the Present Time Set button the Manual Tuning
increments and decrements the clock display directly.

Setting frequency via the keypad works fine.

The clock is driven by IC501 and the radio by IC502, so I think there
maybe something wrong with IC502 or the communication between IC501
and IC502.

The Rotary Encoder and its associated logic IC504, IC505 seem to work
properly.

Also all the pins on IC502 seem to be doing the right things on a
scope, although I don't really have enough servicing detail to tell.

Has anyone seen this fault before?

Does anyone have a spare working keypad/display pcb so I can do a
substitution test?

I am loath to scrap this radio, but I can't imagine that the spares
are easy to come by at this level.

TIA

Nick