Products > Test Equipment

Upgrading the HP/Agilent 8714C from green CRT to color LCD

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AF6LJ:
This is very Cool, looking forward to more pictures and info.
 :-+ :-+

TheSteve:
Yes, more info would be great. A cheaper and easier mod is anyways welcomed. It would be nice to ditch the VGA interface.

andy2000:
Here are some more pictures of the project.  I'll post a list of part numbers for the ICs soon.  They were standard parts from Mouser.  I already had miscellaneous parts like caps and resistors on hand. 

U1025 is used for brightness control, but I didn't install it since I assume the firmware lacks support for that feature. 

I simply grounded the unused LSBs of the LCD. 

I mounted the LCD to a piece of Plexiglas which I attached to the CRT brackets on standoffs.  I used a router table to shave off the CRT bezel.

andy2000:
Here's a list of the part number I ordered. 

U1008 -- LX8385B-33CDD -- 3.3v regulator
Q1001 -- FDS6679 -- P channel MOSFET
R1025 -- SOMC160333R0GEA  -- resistor array, 33 ohms
R1026 -- SOMC160333R0GEA  -- resistor array, 33 ohms
U1012 -- SN74LVT125D
U1009 -- SN74LS123DR
U1010 -- 74LVT574WMX
U1011 -- 74LVT574WMX
J1020 --  A3E-50PA-2DSA(71)

KrudyZ:
I recently bought a nice copy of the HP 8714ET and have just received my LCD from Shenzhen.
https://www.ebay.com/itm/VGA-LCD-Controller-Board-RT2270C-With-8-4-AA084VC03-640x480-LCD-Screen/181965840286?hash=item2a5e025f9e:g:1oUAAOSwbtVZV2uh
I paid $90 shipped. It arrived within 10 days and was well packaged, so I had a good experience with this seller.
I chose to go the analog VGA route as it seems to require fewer modifications to the analyzer.
Here is a picture of the LCD kit plugged into the external VGA port and powered from a 12 V lab supply (it draws about 1 A).
This is using two fluorescent backlights. I'm still waiting on the LED strips to come in to update the backlight and complete the mod.
Rudy

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