Electronics Repair

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Resistor in PSU supply lead?

Hi all, So I scoped the rails of this Uher tap deck I've been working on and they were noisy as hell; a lot of ugly rip...
4 comments posted 5mos
posted by cd
4 comments posted 5mos posted by cd

replace UPS battery with lithium ion?

I have an older Cyperpower 550VA where I just replaced the traditional 12V lead acid battery. Since I've had great succ...
9 comments posted 5mos
posted by none
9 comments posted 5mos posted by none

Flashlight runs even when off

I have several little LED flashlights, 2 1/2" long and 7/8" in diameter, and on one the pushbutton switch on the end br...
6 comments posted 6mos
posted by NONONOmisc07
6 comments posted 6mos posted by NONONOmisc07

LIttle cheap readido is dead. Thermal fuse?

I have a cheap little radio that runs on AC or batteries, a Jensen MR-550, fwiw. The voltage coming out of the power tr...
9 comments posted 6mos
posted by NONONOmisc07
9 comments posted 6mos posted by NONONOmisc07

intermittent Dell XPS 420 failure

I have an old Dell XPS 420 desktop that wouldn't come on some weeks ago. I was finally able to get it working by cuttin...
3 comments posted 6mos
posted by dolob55J
3 comments posted 6mos posted by dolob55J

Monitoring ignition on a 1990 Honda Si.

Hi again, An Owon 2202S scope is mounted on the dash and connected to spark plug wires 3 & 4 of my Honda now. The pictu...
3 comments posted 6mos
posted by peter
3 comments posted 6mos posted by peter

Copper-constantan thermocouple.

Anyone worked with copper-constantan thermouples? How are the two wires joined? A dry bath heats a block of aluminum wh...
3 comments posted 6mos
posted by peter
3 comments posted 6mos posted by peter

Unold Backmeister difficult to switch on

Hello, Bought second hand one year ago but according to serial code plaque fabricated 11 years ago. My bread making Uno...
9 comments posted 6mos
posted by wu.ming2
9 comments posted 6mos posted by wu.ming2

F60 code Panasonic

Panasonic DMR-ES40V with an F60 code. Any help
3 comments posted 6mos
posted by Arnie
3 comments posted 6mos posted by Arnie

What does 30 kA mean?

I have an Agilent U1241A VOM that I bought at a hamfest for only $20, new, but the previous model and it seems to be mi...
10 comments posted 6mos
posted by NONONOmisc07
10 comments posted 6mos posted by NONONOmisc07

Bad clocks in 2 identical DVDRs; Maggic buttons.

Here's a follow-up, or at least a related post to this one by me: Subject: Broken DVDR Message-ID: snipped-for-privacy@...
0 comments posted 6mos
posted by NONONOmisc07
0 comments posted 6mos posted by NONONOmisc07

Olympus C-5060 with PS-BLM1 Li-ion battery.

Hi, I was given the camera with power adapter and one battery. No external battery charger. According to Wikipedia, wou...
6 comments posted 7mos
posted by peter
6 comments posted 7mos posted by peter

How to clean a Dell laptop screen?

What does the first sentence mean: Moisten a microfiber cloth with a mixture of 70% isopropyl alcohol / 30% water. The...
15 comments posted 7mos
posted by NONONOmisc07
15 comments posted 7mos posted by NONONOmisc07

Re-Capping

Hi all, I think it might be a good idea to replace all the tantalum caps used for coupling and decoupling purposes is U...
16 comments posted 7mos
posted by cd
16 comments posted 7mos posted by cd