sanyo

[budm]

Re: sanyo

Well, then we need to look at that Inverter circuit section to see what is going on. Need bottom side pictures as a whole and also in small sections so I can trace out the connections.

[dejesus]

Re: sanyo

Can you see any fuse or fusible resistor?

[tom66]

Re: sanyo

Service manual
http://www.tgohome.com/ServiceManual...&Search=Submit

[dejesus]

Re: sanyo

thanks. wonderful. I will try to work with it.

[dejesus]

Re: sanyo

I can't find why there is no back light. Any help pls.?

[dejesus]

Re: sanyo

Hi, budm. tom66 send me the service manual but the more I read it the more confuse I get. Can you pls help me. I don't know what iam looking for.

[dejesus]

Re: sanyo

I went over the service manual but I can't identify what is a fusible resistor. Not familiar with this type of work but trying to learn. Help will be appreciate.

[budm]

Re: sanyo

I did not have a chance to download the service manual yet.

[dejesus]

Re: sanyo

how are you doing today? Just take your time. Am sure glad you are back!

[budm]

Re: sanyo

OK, there is no SCH for the power supply board. Can you remove the K8L connector on the main board to see what happen?

[dejesus]

Re: sanyo

Thanks for your help Budm. I disconnected the k8l connector and turn it back on but nothing happen.

[budm]

Re: sanyo

OK, post good clear pictures of the bottom side of the power supply board, the whole pictures and lots of small sections so I can trace out the connections. Make sure that they are good pictures since that is all I have since I do not have the board in front of me, so for me to be able to draw the diagram, I will need clear pictures.

[dejesus]

Re: sanyo





will send the rest in a minute

[tom66]

Re: sanyo

Budm probably refers to the green side of the circuit board, underneath those photos, not the bottom of it.

[dejesus]

Re: sanyo

rest of pics.

[dejesus]

Re: sanyo

ok

[dejesus]

Re: sanyo

are this pics. ok?

[budm]

Re: sanyo

Good pictures, thanks.
So I trace out the connections in the Inverter transformer output drive SCH, there is no fuse or fusible resistor feeding the two MOSFET, we already verified that the B+ PFC Voltage feeding the two MOSFETs is OK. We need to verify that the IC that drive to Gate drive transformer is working or not. Please get the P/N of those ICs so we can look up the spec sheets for them next.

[dejesus]

Re: sanyo

Budm, the only one I was able to read was the large one. It have this number 1692IDW

[budm]

Re: sanyo

U1504, the one that drive the Gate drive transformer as shown in my diagram is the one we will need the most, we need to find which pin of this IC is the power supply pin, and how it works.