[time-nuts] any experts at repairing WaveTek 288's?
didier at cox.net
Wed Apr 30 07:24:39 EDT 2008
It is not clear from your post if you did that test while under power or
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.
> -----Original Message-----
> From: time-nuts-bounces at febo.com
> [mailto:time-nuts-bounces at febo.com] 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?
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