Oddball diode?

Question

Sorry for asking what I know in advance is going to be a stupid question, but I tried googling and could find no information. Normally I work on pinball machines and arcade machines, and I've never run into this part until I was asked to work on a television set with bad sync.

Anyways... on the sync board is what I assume to be a rectifier... marked B12 in large letters, with the number 69 in small letters. I can find no information online.... any ideas on what exactly this part is, and its specs?

Thanks in advance, and sorry for the stupid question.

Gordon

Eeyore · Accepted Answer

Why do you think it's a rectifier ?What size is it ? How many pins ? Construction ? Colour ? etc...Graham

Matt J. McCullar · Answer

Is there a cathode band on one end?  How does it read on an X/Y componenttester or a diode leakage test on a digital multimeter?  What does itconnect to in the circuit?

electricitym · Answer

Do you think you should be working on televisions?? ... for your own safety you should go to the website for this newsgroup at

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there, with some of your search time you will find a wealth of television repair information and most importantly, SAFETY information and proceedures that will keep you away from dangerous and lethal electrical shock hazards. electricitym

CJT · Answer

Many arcade machines include CRT monitors with the same issues as TVs.-- The e-mail address in our reply-to line is reversed in an attempt tominimize spam.  Our true address is of the form

hrhofmann · Answer

How about a couple of pictures, monitor model number, manufacturer,date code, etc!!!H. R. Hofmann

gordon.mott · Answer

Because it has the cathode band on it, isn't glass, and has two pins.It's black, and the band (and writing) is brown.Sorry for not providing enough information.-Gordon

gordon.mott · Answer

Yeah... I've worked on MANY arcade CRTs... Just never a TV before.

gordon.mott · Answer

Cathode band on one end.  I get no reading on the diode leakage test.It's marked as D5E1 on the sync board.

gordon.mott · Answer

Monitor is 50P-GHS81.  Made by Mitsubishi. Date stamp reads December1997 MINO.  Will upload pics shortly.-Gordon

gordon.mott · Answer

I got no reading because my battery was dying and I didn't notice thedisplay.  Leakage test reads .534V.

gordon.mott · Answer

Ack.  This is what I get for posting while I'm distracted.   Forgotimportant information.  Board has a symbol on it related to theposition.  Is a normal diode symbol.  Def not zener, shottky, etc....

Oddball diode?

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