| Electronics > Repair |
| Display 3478A |
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| hnjmkl:
In an attempt to rotate the LCD (DSP1) of my 3478A it went KO, P / N 5061-1166. On YT someone managed to replace the 3457A LCD with different displays, even nixie, do you know a feasible project for this intervention? Is the 3478A's LCD different from the 3457A? In appearance they are identical but in the 3457A Service manual I did not find the P / N of the display. |
| rsjsouza:
I think one of the most comprehensive discussions about replacing HP3478A displays is at the following thread: https://www.eevblog.com/forum/projects/led-display-for-hp-3457a-multimeter-i-did-it-) It starts with an LED replacement but there is also mention of using small OLED graphical displays. (edit) found the other OLED thread. https://www.eevblog.com/forum/testgear/hp3548-hp3457-oled-display/ (edit) fixed URL |
| ledtester:
--- Quote from: rsjsouza on November 16, 2022, 11:58:28 am ---I think one of the most comprehensive discussions about replacing HP3478A displays is at the following thread: https://www.eevblog.com/forum/projects/led-display-for-hp-3457a-multimeter-i-did-it-)/ --- End quote --- The first link has a paren at the end which doesn't get included as part of the URL by the forum's editor. Here's a working link: https://www.eevblog.com/forum/projects/led-display-for-hp-3457a-multimeter-i-did-it-%29/ |
| M0HZH:
I used a display from a cheap HP 3488A Switch/Control Unit to restore a HP 5385A Frequency Counter and did some reasearch at the time. Many of the HP gear of the era use the same displays, there are 3 revisions "groups" where displays are compatible with eachother (so 3478A would work with a 6622A display) but no proof that they're compatible between groups (for example 3478A with 3488A display). LCD PN: 5061-5212 HP 3478A HP 6622A HP 6630A/B LCD PN: 5181-2813, 5063-2305 or 5083-3473 HP 3457A HP 3468A HP 3488A HP 3852A HP 5384A HP 5385A HP 5386A HP 6624A HP 6645A HP 6674A LCD PN: 5065-7075 unknown models, after 1995 I'd still get a cheap 3488A unit off eBay and try its display out on yours, not much to lose. Some of my pics / comments from when I did the swap: https://twitter.com/YO9IRF/status/1339663054053789696 |
| sagias:
Tested oled on 3478 |
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