HP8566 MANUAL PDF

It is so heavy that engineers at HP had to split it into two units so that they could be moved by a single person relatively easily. Even so, the two units weigh in at more than 50 pounds each. And because it is so heavy, shipping damage is common for these used units if you could buy one locally, it is probably the safest way to go. Mine is also no exception.

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I began with the display section. There is a way to operate it without the RF unit, by placing a couple jumpers, one to start the unit and another one to select TEST mode. Wiggling somewhat the cards I got an still better one And then Right image come and went by barely touching the cards, specially the A6 one. Once cleaned, display unit showed a nice test pattern consistently so I decided to connect it again with the RF unit So I decided to get all cards out and carefully clean them and the card cage I am now reinserting them So unit kind of works!!!.

Checking the service manual, I found the circuit which managed it. It is the Z-axis circuit. Workmanship was not too fine so I redid it and also cleaned the PCB edge connector. Everybody suggested it was a matter of failed capacitors in the YTO control boards. So I took out all boards in that section. I was looking for bad capacitors, so this one seemed very suspicious look the discoloration in one side : So I took my trusty ESR meter to check all of them: And, yes, all were OK except for the suspicious one, which was open :-!!!.

Once I got all cards in again, I fired the unit But, before moving it to its temporary storage location, I have checked it with the aid of my HPA generator another nice instrument! I have found them from 2. As I did not align the YTO before replacing the faulty cap, I think this will be just a matter of fine alignment. Then I have seen that someone had replaced air filter element with a foam which is clearly not good for that purpose, as it reduces airflow a lot.

So I have temporarily removed it and temperature has gone to reasonable levels, but still very hot. And this is my main concern so far: using a 2. Checking block diagram, I see there is a different circuit from But something is not working fine to have such a big difference. All in all, my main use for this SA will be in frequencies below 2. So I will investigate more about this In that case, the manual calls for a Manual Calibration Procedure, explained also there. Here you have the display showing the fault: In previous steps, signal keeps inside the graticule but in this one, it is all over the top of it I will investigate what is happening exactly at that moment, as previous steps run fine, in order to try to correct the problem and have the unit finish the procedure.

As I suspected and John suggested, the extra gain was a problem. It seems gain is too much to be compensated by the auto-calibration system. Luckily, all the adjustments are on the top of the unit and it is over the RF SECTION so it was just a matter of removing top cover: This is the area with the 9 PCBs involving IF and the rest of analog processing: Once removed all boards, you can see the shiny gold-plated PCB: Here you have all the boards, one by one: Someone had been here before, as there were some test pins with globs of solder.

Of course, I cleaned them.

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HP8566 MANUAL PDF

I began with the display section. There is a way to operate it without the RF unit, by placing a couple jumpers, one to start the unit and another one to select TEST mode. Wiggling somewhat the cards I got an still better one And then Right image come and went by barely touching the cards, specially the A6 one. Once cleaned, display unit showed a nice test pattern consistently so I decided to connect it again with the RF unit So I decided to get all cards out and carefully clean them and the card cage I am now reinserting them

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Migami Everybody suggested it was a matter of failed capacitors in the YTO control boards. See each listing for manuak shipping options and costs. Skip to main content. Unfollow hp service manual to stop getting updates on your eBay Feed. Someone had been here before, as there were some test pins with globs of solder. Please enable JavaScript on your browserthen try again.

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Here you have all of them, one by manuzl I carefully cleaned the edge connectors, added some contact cleaner, reinserted them and hoped for the best Format see all Format. It is the Z-axis circuit. Then I have seen that someone had replaced air filter element with a foam which is clearly not good for that purpose, as it manal airflow a lot. Checking block diagram, I see there is a different circuit from So I have temporarily removed it and temperature has gone to reasonable levels, but still very hot. There is one adjustment in each of the five filter stages. Condition see all Condition.

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