Re: HP8562A Errors 304,335,317,333
¿ªÔÆÌåÓýWould Like to say Good news but? ? Managed to get the Analyser on the bench today for a quick check and looks as if 28Volts not there. ? Also getting that smell of Burning rubber so worried could be causing more damage and need to isolate the source and start diagnosing supply. ? Can the PSU work standalone, or is it load conscious? ? Stu. ? ? ? ? From: [email protected] <[email protected]> On Behalf Of Peter Hansen
Sent: 17 April 2020 09:51 To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333 ? hello Stu if you look on A2 on the side you see the LEDs for the PSU. All should be LIT. I am sure this is not a PSU issue. If you work through the 300/600Mhz chain with an osilloscope you can check where the signal dissapears. I remember the 600Mhz is made in a doubler and if signal is too small you have not enough for doubling to 600Mhz. best regards Peter ? Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Peter, ? Ok from schematic I can see the 600MHz Oscillator ¨¤ Buffer ¨¤ /2 = 300Mhz ¨¤ Offset Loop Buffer. Is that correct? Is it the /2 device your talking about? The whole board seems to be a 600Mhz PLL with 10Mhz ref at source. Correct me if I¡¯m wrong. ? I still think something burn¡¯t out although th PSU looks clean. Just prepping up before getting My hands dirty.. ? Stu. ? From: [email protected] <[email protected]> On Behalf Of Peter Hansen ? Hello Stu I must correct my self. The 8562A is before use og MMIC. area is still the same. It is just discrete amplifiers. Order a schematics from Artic media ant look for Radio Frequency module look in the page with the generation of 300/600Mhz. Reason why you can?t measure anything is because the 600Mhz is used for third mixer. best regards PEter ? Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...> ? Peter, ? Which board are we talking about ? Still looking for the LED PSU indicators on the A2 card. ? Presume you are referring RF board..? Is this an off the shelf part or HP proprietary? ? Thanks, ? Stu. ? From: [email protected] <[email protected]> On Behalf Of Peter Hansen ? Hello Group a TAM is not needed in this case. It is simply a MMIC in the 300/600Mhz chain that is bad. I believe Harke has a Hp85629A TAM for sale. best regards Peter Hansen ? Fra: [email protected] <[email protected]> p? vegne af Don Bitters via groups.io <donbitters@...> ? I suspect you might be able to rent the TAM from one of the ETE rental outfits for a month or so for not a horrible price.? I believe that Tam Hanna has one or two for sale, I may purchase one from him for my own use with my 8562A. |
