Electronics Repair

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Unknown device "3B" on motor drive boards.

Greeetings, group. Lately I've been repairing motor drive boards for variable-frequency 3-phase AC motors. (These typic...
17 comments posted 14yrs
posted by see.my.sig
17 comments posted 14yrs posted by see.my.sig

Ever felt stupid ... ?

I had a Hartke combo on the bench today. Owner is a keyboard player, and reckons that he blows the tweeter fuse regular...
36 comments posted 14yrs
posted by arfa.daily
36 comments posted 14yrs posted by arfa.daily

EIA-198-D capacitance codes

I'm sorry if the following is common knowledge, but I was recently deciphering the marking codes on an smd tantalum cap...
1 comments posted 14yrs
posted by fzabkar
1 comments posted 14yrs posted by fzabkar

HDD TVS diode FAQ

The purpose of this FAQ is to address a question that pops up on a regular basis at various storage forums. The usual s...
0 comments posted 14yrs
posted by fzabkar
0 comments posted 14yrs posted by fzabkar

CRT TV repair, power supply defect.

I have a phillips 29 inch tv(model PT4423) which lost power suddenly. After replacing a shorted chopper transistor in t...
18 comments posted 14yrs
posted by vernondopaul
18 comments posted 14yrs posted by vernondopaul

Harma 6L6GCSTR valve problem

So called Superior Grade Cryo Work ok and test ok but in use and the tester there is low insertion/extraction force in...
6 comments posted 14yrs
posted by diverse
6 comments posted 14yrs posted by diverse

Can't find datasheet or pinout for this IC

"360-2002B" 16-DIP. Google shows surplus inventory and e-Pain shows: (Yes, I PM'd them and no, they don't know what it...
4 comments posted 14yrs
posted by invalid
4 comments posted 14yrs posted by invalid

unkown power supply

Hi all, I have found an old SMPS I'd like to revive. It is marked as triumph-adler model CTNA (100-240V AC input). It d...
0 comments posted 14yrs
posted by frank
0 comments posted 14yrs posted by frank

TL064 in PV 212 Deuce, VT Series, 1980

TI IC marked SN99661 and 70400604 and 604 on the schematic A number of people (out there) enquiring about work-around o...
11 comments posted 14yrs
posted by diverse
11 comments posted 14yrs posted by diverse

AIWA AD-F810 3-Head Tape Deck

Hello, all. After not using the subject cassette deck for several years I decided to use it (with a computer) to conver...
3 comments posted 14yrs
posted by john.wood
3 comments posted 14yrs posted by john.wood