Re: HP 8920B #hp8920b various questions
#hp8920b
?I¡¯m about to clear the bench and undertake the task of repairing/replacing caps in the PS of my 8920A. Someday, maybe Rick will get the opportunity to turn it into a ¡°B¡± model. ? tnx Mike
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Mike / K5JR
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#692
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Re: HP 8920B #hp8920b various questions
#hp8920b
Thank you for the info Rick, greatly appreciated! I managed to score a soft carry case for my 8920B for free from a friend, also renewed all the caps in the power supply, and new memory battery. I
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opelgtalex
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#691
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Re: HP 8935 Power Supply
Thank you Rick, much appreciated. While trying to analyze the circuit, I concluded that was part of the start circuitry and replaced it first up. Unfortunately it wasn't the problem. I'll try the heat
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Dave Downie <vk4dp@...>
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#690
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File /Agilent HP 8920A 8920B 8921A Power Supply Capacitor Renewal/Agilent HP 8920A_B 8921A Power Supply Capacitor Renewal.pdf uploaded
#file-notice
The following files and folders have been uploaded to the Files area of the [email protected] group. * /Agilent HP 8920A 8920B 8921A Power Supply Capacitor Renewal/Agilent HP
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Group Notification <noreply@...>
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#689
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Re: HP 8935 Power Supply
Rick - Is that the same power supply that is used in the 8924? John K
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@WB4YJT
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#688
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Re: HP 8935 Power Supply
Dave, ?? That "daughter" board is near the middle of the rear most power supply board. It's NOT the board with the (2) potentometers. rick
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[email protected]
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#687
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Re: HP 8935 Power Supply
Hi Dave,? Look for a 47uf/ 35V radial capacitor on a "daughter board" that is on the board closest to the rear of the 8935. That is usually the problem. A good test to see if that's the problem is to
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[email protected]
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#686
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HP 8935 Power Supply
I posted this in another group and it was suggested I post it here. I have a HP 8935 that I¡¯ve used for a while with no issues. Turned it on recently and it shows no signs of life - nothing. I¡¯ve
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Dave Downie <vk4dp@...>
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#685
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Re: HP 8920A Firmware Upgrade Issue
Update... 14.14 FW still will not boot (non-recoverable firmware error) even with S1 in the non-protected position. My eprom programmer, a BP1148, seems to have no problem converting Intel hex to
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wgwl
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#684
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Re: HP 8920B #hp8920b various questions
#hp8920b
Hi Alex, ?? The lithium battery only saves screen setups. It will not save the "last settings..." Regarding the PCMCIA cards, if you are only using SRAM (battery backed up) cards, the Adtron
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[email protected]
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#683
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Re: HP 8920A Firmware Upgrade Issue
Depends on the programmer you are using. Typically binary images are what is used in programming devices. However some programmers can take HEX or SREC formats and either use that directly or convert
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John Yelmgren
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#682
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Re: HP 8920A Firmware Upgrade Issue
I just realized that the image files are in Intel hex format. Do they need to be converted to binary before I program the eproms??Sent from my Galaxy
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wgwl
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#681
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Re: HP 8920B #hp8920b various questions
#hp8920b
Thank you for the info regarding VGA out, I missed that little tidbit in the instructions. The blank where the ¡°Options Interface¡± is will make a nice spot to mount the connector too! Thank you
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opelgtalex
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#680
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Re: HP 8920B #hp8920b various questions
#hp8920b
If you used the NewScope-0Jr., It actually has a VGA output header, you just have to build a cable for IEC to VGA and put it on the back panel.
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DCFluX
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#679
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HP 8920B #hp8920b various questions
#hp8920b
Hello to all, I had a couple questions; 1. Might someone have an 8920B front bezel that is for the 0.400-1000MHz version? I have the 30-1000MHz bezel and looking for the correct one for my unit if you
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opelgtalex
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#678
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Re: HP 8920A Firmware Upgrade Issue
I Have had the following cause a non recoverable firmware error: eeprom is write protected, bad signal source board - aparantly the controller couldn't communicate with it; corrupt eeprom, bad
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[email protected]
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#677
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Re: HP 8920A Firmware Upgrade Issue
No clue? ?my only suggestion would be to remove the hardware down to the CPU , Memory card and CRT display board and see if anything changes. The signaling , HP-IB and SA boards are always optional
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John Yelmgren
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#676
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Re: HP 8920A Firmware Upgrade Issue
The error message is as follows.?Non-recoverable firmware error. Please record the 2 lines of text below.........'$Header: syshlp.c,v 12.1.2.1 95/02/15 11:38:16 hmgr Exp $' at line number 273Sent
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wgwl
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#675
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Re: HP 8920A Firmware Upgrade Issue
As to the original question with the firmware upgrade failing. What if any error do you get on the screen ? If none do you get an LED error? code ...page 591/592 assembly level repair guide I have
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John Yelmgren
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#674
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Re: HP 8920A Firmware Upgrade Issue
The device wrtie protect will only come into play if you reprogram or copy the calibration EEPROM. Yes there are a lot of the device programmers that will by default set the EEPROM to write protect
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John Yelmgren
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#673
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