Can You Help Identify This Resistor?

UPDATE:: The Emitter is going to the Positive side of a Cap. (330uF {other obvious problem} the that appears to connect to 115V). The Base is connected to a button cap. and the Collector is attached to some resistors. Thank again

When you say its a funny looking M.... could this be the Motorola logo?

I wonder if its a series pass regulating transistor or something... with those connections its possible, but the numbers mean nothing to me, they look like a custom printed number....

What is the package size, is it surface mount?

John.

It is not surface mount, it is just over half moon shape. It is 5/32" tall. 3 leads. and it is black.

Blimey you had me going then.... 5/32"?? okay so that looks like a TO92 package, plastic yes?

Yes, it does look like a TO92 package and it is plastic. I just realized the Thread title says resistor, I think it auto correct or something, but I meant transistor. sorry for the confusion, it has been a ruff night.

I'm stoatally confused as the thread says RESISTOR! not Transistor..

confuse a cat...

Any chance of a digital picture, please?

Depending on the age of the TV, since most sets still working were produced in Asia, specifically Japan from the mid-60s to late 90s, it's probably a Matsushita/Panasonic or Mitsubishi transistor (they have funny looking Ms).

Bob,

wouldn`t it be easier to tell the type of TV you have ? Perhaps someone has a schematic. Apart from that there are a lot of www-companies selling copies of mature devices, or you find it even for free !!
Good luck Uwe

Hey bob,

I used to fix TV for a living (15 years) If you can post the Model, Make, componet location (something like Q510) and a chassis number I can check my database and see if I can help you. the 264-1c looks like a Zenith part number almost but the funny M538 makes me think its a motorola part.

Model and make will help a bunch.

let me know.

bill12780

It is a Zenith Chassis Number SR2768. Q3431 is the Transistor. Thank you.

If Bill can't help you Bob, I'm a member of a vintage restoration forum...

The bods on there will know (maybe)!

I think I need a new keyboard (or brain) it is SR2768S.

Hey Bob,

I wondered from the part number if you had a zenith. This is your problem. Zenith NEVER has wanted anyone to fix their TV's to componet level. So the number on your transistor has a zenith number on it. 264-1c is actually 121-264-01 (or just -1). You used to could cross these numbers in ECG or NTE. But not anymore. The M538 means its a motorola part (probably M538001c) but how to use that number to convert it to a generic I have no idea and neither of them cross to NTE.

If you really want to fix this set I would recommend changing the module. That is what Zenith wants you to do. The main module number is 9-1538. You should look for a small white sticker on the main PCB (sometimes on the CRT has well) to verify I am right but it will be a 9-15XX-XX type number. The new module will make the TV basically a NEW TV it comes with everything except the CRT, Speakers, and the little Keypad PCB for the front switches.

I did a quick check on line and the boards are bout 120 bucks with probly a $30 core or somthing like that.

From the componet location (if I had to guess) its in the Switch Mode Power Supply (smps) and if that is the case and its burnt up. I would just change the module.

Never trade time for parts! You could spend hours going to componet level and unless you buy a SAMS for the TV your SOL because Zenith prints are basically block diagrams. You can change the module in about 15 mins. and generally there are few if any adjustments that need to be done (focus, G2, color balance, etc..) and they are pretty easy to do.

Good luck. I hope I have helped. (not good news but some answers at least)

bill12780