It is not clear from your post if you did that test while under power or not.
This is probably a Rotary Optical Encoder. It may need 5V to power the LEDs or light bulb that activate opto-sensors, so you probably need power applied and use a scope to check the outputs. Also, some devices only generate short pulses on the outputs which will never show with a multimeter (I have a Kenwood radio that does that), you would need a scope. If you do not get anything, it may be that the light bulb inside is dead. This is a common problem on HP gear of that vintage. Didier KO4BB > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Scott Burris > Sent: Tuesday, April 29, 2008 9:53 PM > To: Discussion of precise time and frequency measurement > Subject: [time-nuts] any experts at repairing WaveTek 288's? > > This may be a little too far off the topic of this list -- if > so, feel free to ignore this message :-) > > I'm trying to get a WaveTek 288 back in working order. First > problem is that the rotary switch on the front panel doesn't > work. Checking with a multimeter, it never closes any > switches when rotated. Anyone know of a commercial > equivalent to WaveTek's part? > > Second problem is when I run calibration, I'm getting a ERR > OFST ZERO message. The service manual isn't helpful beyond > saying to check the motherboard. Anyone seen this error who > could suggest the mostly likely failed components? > > Thanks. > > Scott > Internal Virus Database is out-of-date. Checked by AVG. Version: 7.5.519 / Virus Database: 269.22.5/1358 - Release Date: 4/3/2008 6:36 PM _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
