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I have a dead HP 9153A disk drive, it had blown power supply fuses. The fuses were replaced, the power supply is fine. The yellow error LED flashes when the disk drive is turned on. Nothing more

From what I see, this looks a lot more like the original layout. If the packages were different, I'd have gone with a 90 degree rotation on the amplifiers.? However, unless you do a staggered layout

Alrighty, I've tweaked the layout a bit. I rotated the amplifiers by 45 degrees to straighten the traces. Also sprinkled a couple more vias around the place here and there. If this looks good, I'll

The following files and folders have been uploaded to the Files area of the [email protected] group. * /All HP, Agilent and Keysight instruments in folders by part numbers/000

I've uploaded the scan

Hank, I did the same tests as you, and unsurprisingly, it's different. If the PRETUNE signal does not work, you need to repair A11 PRETUNE signal before going any further. In this case, it's

Yves Here is what I get with the 8743d PRESET with Port 1 ?connected to my SA. ?Any MEAS tests have no impact . ?There's a peak at 392.588 KHz -63.8 dBM.

... of a cheap and simple OXCOs upgrads from Ebay? Otherwise, I'm lost.

Yves… Thanks! That is providing some insight I didn’t have before. Tom, N8ZM Sent: Wednesday, November 08, 2023 3:33 PM To: [email protected] Subject: Re:

Yves OK, let me know what you find. ?I also noted the cnt: .997 MHz which fluctuates around 1 MHz. ?I'll ?turn it off. ?On the left side as you noted there's a P? which you said is low power but I

Hi Tom, You have already verified that the YIG does not carry any power output from 300kHz to 6GHz if I understood correctly, from 10kHz to 300kHz, it is not the YO which is the source. The

Having emailed Simmconlabs some time ago, they kindly informed me that they now had LCD replacement kits for the 1345 display in stock. I ordered one, installed it and the result was a delight! As an

Hi, I think you may not have done the right test, I notice this when looking at your results, we see that the frequency counter is activated on the right. But not having the same firmware version

Hey Yves Here's what I get ?YO coil check, I did it twice and both times same result, pic ?enclosed. ?Does this mean A11 is bad and A# could e OK? ?Please give the steps to for this question; "An

Ken, I've got one and the manual has been in my scan list. I'll try to get to it today, though no promises. Please bug me about it if you don't hear from me in a while. Matt

Greetings, I am seeking a copy of the little user’s manual for the HP-548 logic clip. Manual PN: 00548-90009 I have searched all the places I can think of with no luck. The Keysight website has

HI Yves… I don’t think anyone outside of HPAK ever had an official one for the ES; I was just asking if you had drawn up something yourself. It has been a few months sine I tried to repair

Hi Tom, Unfortunately, I don't have the diagram of the A3 board. I had found the 2 faults by checking the sensitive components of the PCB and found the faulty components. I remembered while

Hi, A quick little test could guide you next. This test is on page 7-10 of the “YO Coil drive check with analog bus” service manual. The config will allow you to open the PLL loop, and

I measured all the A8 Post Reg voltages and they are in Range per ?Table 5-1. ?So I would guess it must be A3 SOURCE or ???? ?If you have time please let me know. ?I will rerun the section 7 test