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HP 8565E problem

OK1VAW Vojtech All Messages By This Member #23700 Hello group, After year of a good service our HP 8565E is getting some illness. I have tried to look to 8560x service manual which was available, but the error numbers, which the 8565E gives are not there. I am getting following error: ERR 340 SAMP AGC ERR 338 LOMA AGC ERR 319 WARN COA ERR 351 setrl some of the texts could be wrong read, the errors display one over each other and they are not easily readable. The frequency display seems to be unstable, jumping erratically in the range of 100Mhz around the correct frequency. The errors are seen just after switch up, when displaying full sweep, and after some time it is when greater span is used (above 100MHz), below that span it seems to be stable. I suppose it is something with YIG or frequency synth.... I will appreciate, if somebody could interpret those errors for me, or even better, if somebody knows a reliable source, where the service manual could be bought or downloaded. I have looked to Artekmedia, but I have not found it there. Thanks for reading and will be gratefull for any info, OK1VAW, Vojtech, Prague.
John Miles #23701 Artek's 8560E-series manuals may not be the latest and greatest edition for the 8565E specifically, but they'll help. Their schematics volume does cover all models in the series, and it's almost certainly the latest edition since it came directly from Agilent last year. I don't see the 340 or 338 errors in the 8560E manual, but 319 is listed as "The YTO coarse tune DAC is near its limits" and 351 means "YTO error voltage is not settling." Sounds like there's a problem in the YTO main-coil driver section. If you can find an 85629B TAM module, the YTO adjustment procedure will likely reveal or even correct the problem... otherwise you can try the non-TAM-based procedure in the 8560E manual, noting that it might not apply to the 8565E or might actually make things worse. -- john, KE5FX toggle quoted message Show quoted text -----Original Message----- From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]On Behalf Of vojtech Sent: Tuesday, September 29, 2009 11:30 AM To: hp_agilent_equipment@... Subject: [hp_agilent_equipment] HP 8565E problem Hello group, After year of a good service our HP 8565E is getting some illness. I have tried to look to 8560x service manual which was available, but the error numbers, which the 8565E gives are not there. I am getting following error: ERR 340 SAMP AGC ERR 338 LOMA AGC ERR 319 WARN COA ERR 351 setrl some of the texts could be wrong read, the errors display one over each other and they are not easily readable. The frequency display seems to be unstable, jumping erratically in the range of 100Mhz around the correct frequency. The errors are seen just after switch up, when displaying full sweep, and after some time it is when greater span is used (above 100MHz), below that span it seems to be stable. I suppose it is something with YIG or frequency synth.... I will appreciate, if somebody could interpret those errors for me, or even better, if somebody knows a reliable source, where the service manual could be bought or downloaded. I have looked to Artekmedia, but I have not found it there. Thanks for reading and will be gratefull for any info, OK1VAW, Vojtech, Prague.

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