T&L Publications

Hello all you good people: I am looking for a schematic that will recognize when a computer connects to a phone line Weather I am on the Phone or when the line is open or not in use. I was wondering if there is a simple solution like detecting a fax ring or modem. When you have a fax machine it can ...

Hey Mike: If you go to All Electronics Website You will find just the heat sink that you want. The one that I have bought is about 3 and 1/2 inches by 3 inches and has a 1/4 inch thick base plate with 21 vertical fins that are 1 1/2 inches high here is the websight. http://www.allelectronics.com/ Th...

Hey Mike: If you go to All Electronics Website You will find just the heat sink that you want. The one that I have bought is about 3 and 1/2 inches by 3 inches and has a 1/4 inch thick base plate with 21 vertical fins that are 1 1/2 inches high here is the websight. http://www.allelectronics.com/ Th...

Hello Chris: Thank's For the info and to answer your question the input is 120 volts AC to the brigde and 167 or so volts DC out and the supposedly transistors or fets have 70 or so volts on one of them and 160 volts on the other. That is on the drain or collectors. You may be correct in that they a...

Now that I got some attention maybe you guys can shed some light on this project. First of all the transformer that is used for the chopper is a small doughnut about 3/8 inch diameter and has three windings. Accordion to the circuit that I drew up the primary feeds one side of both sections of the l...

Thank's ED for your insight. I took this transistor out of a light bulb that was made by GE in China and I took the liberty of tracing out the circuit and found that two of them are used in an inverter circuit. I tested both transistors in and out of the circuit and they both read 12 ohms in either ...

Hello There: I have not been too active on this net but I have a qusetion and a request. Does anyone here know where I can download a Datasheet for a transistor that is marked 6822al on the transistor? Ther is a marking in addition to the part number which Is SI. I assume that is silinox but I may b...

Jolly Roger!! I have'nt forgotten You. I am trying all that you have suggested slowely but surley and it will take me a little time to do all that you suggested because I am very cautious with taking things apart and writing notes and parts placement to make sure that when I do find the trouble ever...

Thank's I needed that but I'm not going to throw it away not just yet. I am well aware of Compac's mis deeds. Having repaired many of Compac computers and I think that all of their sh****t stinks anyway. But I am going to drain all the info out of the bugger till I see what Makes It tic. Eventully I...

I should be so lucky. Thank's for the Info tho. I am afraid that it's more than a bad connection. The ribbon does not moove when you type a character. It stays in one place and ocsionaly reverses it rotation a bit. I suscept that the stepper motor is not getting it's phase modulated pulse but I can'...

hello Someone with expereince trouble shooting with Laptops. I have a compact LTE 5400 Laptop that is dead. I mean real dead. The battery is dead and I purchased a new one and the unit will not respond. I plugged it in the ac wall, that is the transformer and it still refusses to light the screen. A...

Does anyone have a service manual for an Oliviti Model # 321 or even a schametic diagraham will do?
I have contacted Oliviti but they are out of Business. If anyone knows where I may find this manual or Schematic by all means contact me. thanks too all. Fje