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- Path: sparky!uunet!usc!rutgers!cmcl2!panix!schuster
- From: schuster@panix.com (Michael Schuster)
- Newsgroups: rec.radio.shortwave
- Subject: ICF-2010 frequency adjustment
- Message-ID: <C072qI.7sx@panix.com>
- Date: 1 Jan 93 21:37:29 GMT
- Organization: Panix Public Access Internet & Unix, NYC
- Lines: 94
-
- Frequency inaccuracy of as much as 200 Hz is common on the ICF-2010.
- I just found this on Genie and, later, ported to Fidonet by Bill Oxner.
-
- ======================================================
- Sony 2010 SSB Adjustment
-
- I recently got sick of listening to SSB on my Sony 2010, because
- it was just a bit off frequency, and I actually got better sound
- 100 Hz lower, for instance, 11175.9 rather than 11176.0. Now,
- I've been told that the BFO adjustment is detailed in the
- service manual, but not having it, I decided to go poking around
- inside anyway. Well, I found the adjustment for the BFO, and
- thought some of you might like to try it as well if you're in my
- previous position...
-
- But first, a warning.... Poking around in your radio without a
- service manual can be hazardous to your future listening habits!
- Don't try it if you're not comfortable with taking apart your
- radio or don't have confidence that it will work when you are
- done! Otherwise, it might become time to take a trip to the
- closest Sony repair center. :) And of course, I am not
- responsible for whatever you do to your radio...
-
- Okay, now for the description. (Now might be a good time to
- write down your frequencies stored in memory, if they are
- important...) You can disconnect power if you wish, but you'll
- need it later when adjusting, so it doesnt matter, really.
- Remove screws on back and take off the back lid. Don't forget
- the screw in the battery compartment. You will see a circuit
- board and the back of the speaker. Remove the screws in the
- board with arrows pointing to them and release the plastic
- snap-clamps along the edge of the board.
-
- For the next step, be careful not to rip out any wires; yours
- might be shorter than the ones in my radio. Separate the boards
- enough so you can get to the bottom of the board that is now
- loose. Take care to avoid pulling out the ribbon cables for the
- keyboard--they are only held there mostly by friction. (I found
- out the hard way; the ribbon slipped out partially, without me
- noticing, and suddenly the keypad didnt work... Had me scared
- for a while :).)
-
- You can see a metal case labeled 'sync unit' about 3/4"x3/8"(?)
- that is mounted on the board. Next to it is a blue trimmer pot,
- the only pot in the near vicinity of the metal case. This is the
- BFO adjust.
-
- Now tune in a somewhat strong SSB frequency that can be clearly
- heard. Military stations are best, since their equipment is
- going to be more accurate than a ham radio operator's (in most
- cases :)). I used the GHFS frequencies. Wait until some traffic
- comes on and adjust the pot in VERY small increments. The pot is
- very sensitive, and not much turning will be needed to realign
- your receiver. This adjustment is best done with a non-metallic
- screwdriver or other instrument, since metal might temporarily
- affect the capacitances, inductances, etc. of the circuit, and
- cause it to be off frequency again once you remove the metal
- object. Of course, if you make small adjustments and then check
- it, a metal screwdriver will do the job.
-
- After getting the receiver sound to your liking, which may take
- a while depending on the amount of traffic, switch to some other
- freqs, both USB and LSB, Ham and Military, to see if you need to
- make any final adjustments before closing it all up again.
-
- Just reverse the process to get your 2010 back together. Make
- sure the volume, RF gain, and tone switch all align with their
- counterparts on the case. Best way to do this is to push them
- all either up or down fully. Now, hopefully, your Sony 2010 is
- now back on the right track, and SSB no longer has that hint of
- D.Duck in there!
-
- The adjustment will also affect the SYNC setting, so if your
- sync LEDs didnt always light up on the correct freq, that
- probably is fixed now too. I think Sony should have added a
- 'user-servicable' pot on the back or side with a little hole in
- the case where an 'inclosed' screwdriver could be inserted to
- fine-tune the SSB without delving into the innards of the radio
- or taking it to a service center; are you listening Sony? :)
-
- Does anyone know what the other blue pot is for on that board,
- the one that is more or less off by itself? The PCB is labeled,
- but there is a blob of hardened sealer gunk on mine that makes
- it illegible.
-
- I really should pick up the service manual... I still want to do
- the mod to the tone switch. It would also be nice if there was
- some way for the radio to select WIDE instead of NARROW when a
- band is selected...oh well, can't have everything... :) It's
- still one heck of a radio for the price...
- --
- _______________________________Mike Schuster________________________________
- NY Pub. Access UNIX/Internet: schuster@panix.com | 70346.1745@CompuServe.COM
- The Portal (R) System: schuster@shell.portal.com | MCI Mail,GEnie: MSCHUSTER
-