Fixing a HP34C

[agarza]

It's alive!

At last... I've revived my HP34C!




Thanks for all your help!

[John Garza (3665)]

Beautiful job and excellent machine!
Should last you several more decades.
Enjoy!

-J

[HP: 9100B/9815A/35/45/55/80/70/65/67/67T/97/97S/91/92/21/22/
27/25C/29C/19C/10/31E/32E/33C/34C/37E/38C/41CX/71B/28S/19BII/
12C/15C/32SII/33S/35S/48SX/48GX/50G/Prime/DM32/DM42]
[TI: 50/50A/51A/55/52/56/57/58/58C/59/60/66]

[johnb]

(07-28-2023 12:18 AM)agarza Wrote:  At last... I've revived my HP34C!

Congratulations... and DANG! You've got it looking almost brand new!

I can't see how anyone could FAIL to get pleasure from using such a beauty!


['scuse me while I go get a napkin... gotta stop drooling...]

[teenix]

(07-28-2023 12:18 AM)agarza Wrote:  It's alive!
At last... I've revived my HP34C!
Thanks for all your help!

Nice one, all the effort paid off :-)

cheers

Tony

[Mike T.]

(07-28-2023 12:18 AM)agarza Wrote:  It's alive!

Nice going - It looks great!

[Roman L]

(07-15-2023 12:15 AM)agarza Wrote:  And after the time consuming reassembly..... It still did not work!

As a last option I swapped the power board with a HP33E.

How did you reassemble the boards. I am right before soldering the components to the board. Does the black plastic part still fit over the chips to press fit the power supply and keyboard connector to the board?

[John Garza (3665)]

And... I think every Spice refurb needs a tape strip over the back of the LED PCB.
Looks like all those little holes allow air to get to the LEDs. And if there is any battery corrosion (or the chance of it in the years to come) those corrosive substances will find their way into the LEDs and corrupt them. Cheap insurance.

-J