Need help finding a schematic for a Quasar TV/VCR combo

Try any of the parts distributors for Panasonic, or Matsuchita. These are copyright material, and they will not give out photocopies without written permission.

--

Jerry G. ======

TV stopped working (no picture, sound still worked) I found a few burned resistors (value?), an open power resistor, and I can't identify one other part.

I need help getting the values of the following part numbers on the PCB: R802 R804 R1002 D851

More details:

2) Both 800 series resistors that are bad are connected after the bridge rectifier and before the STR30130 voltage regulator. Could it be just a voltage spike that caused it, or is there something else I should look for? (A partial schematic I drew is available via e-mail if you need a more accurate description of the circuit. Also posted a message with schematic attached in "alt.binaries.schematics.electronic")

Thanks in advance for any help you can give, -Mike

Thanks for your reply. I was not asking for an illegal copy of the schematic. I will buy a schematic if that is necessary. In reality, all I need is someone that has a schematic to help me identify a few parts. Everything checks out except R804 and D851

Thanks, Mike

-------------------

can't

else

D851 is certainly not a diode and almost certainly not broken, you'll be glad to hear! It is a PTC thermistor to control the de-gauss current through the de-gauss coils. However, there are usually three legs to this device so check again to see if there's another connection.

What are the two rectangular things you have drawn - one has RL010 in it and the other a diode symbol? Are there further circuit connections to those two which you haven't indicated?

Thanks for your post. I was concerned about D851. I'm glad to hear it is a thermistor. I unsoldered it from the board, so I'm sure there are only two leads coming from it. There are some markings on it, and I remember 050K being one of them, if that's any help.

As far as your questions: RL010 is a relay which turns the main power on/off. (I only traced out the leads connected to the circuit in question.)

D1001 - I'm pretty sure it is a rectifier which feeds another (lower voltage?) circuit. It looks like a small IC with 4 legs. The symbol I drew is from the PCB diagram. (I started to trace out the rest of that circuit too, since the PCB had been hot there, but I didn't since the components checked out ok).

Really then, the only ID I need now is for R804. It was too badly burned to ID. It looks like a 1/2 watt resistor. R802 is also bad, but it is a power resistor - 180ohm, 3watt.

Thanks, -Mike (P.S. I checked out your website. We have a lot of similar interests!)

On Fri, 25 Mar 2005 21:28:04 -0000, "Graham W" put finger to keyboard and composed:

PTCs come in 3-pin and 2-pin versions.

See

- Franc Zabkar

On Thu, 24 Mar 2005 05:29:54 GMT, "mikeydude" put finger to keyboard and composed:

An STR30130 datasheet is available from

Before worrying about your resistors, I would test the regulator. Pins

Are you sure you have drawn R806 and R807 correctly? AFAICT, pin 1 should connect to ground.

- Franc Zabkar