Re: Sanyo DP42849 - No Power At All
Bump.
Bump.
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Re: Sanyo DP42849 - No Power At All
Doh. It's a 1N4148 type part.
I will try to trace the circuit.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Sanyo DP42849 - No Power At All
If you need more pictures, just let me know. Thanks!Comment
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Re: Sanyo DP42849 - No Power At All
Pics are good now. Trying to understand circuit. Can you check on continuity or 2000 ohms from NEGATIVE lead of C905 to NEGATIVE of big 450V capacitor?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Sanyo DP42849 - No Power At All
I get ~001.Comment
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Re: Sanyo DP42849 - No Power At All
OK, so that is grounded.
Can you see a part # on Q901?
When you test D903, and got ~600, which side was positive, which side was negative? Can you highlight those?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Sanyo DP42849 - No Power At All
I'll try to read Q901.Attached FilesComment
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Re: Sanyo DP42849 - No Power At All
The circuit is starting to make some sense... I think Q901 is a PNP transistor.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Sanyo DP42849 - No Power At All
I'm amazed that you can make anything out of this.
Hopefully I'm looking at the right Q901 - it looks like 2T with a another 2 turned clockwise.Comment
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Re: Sanyo DP42849 - No Power At All
Think that's a PMBT4403. I'll try to trace the schematic out soon. That transistor might be bad. Looks like this surge/failure did some pretty nasty damage but with very little marks left behind.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Sanyo DP42849 - No Power At All
Thought I'd check to see if there's anything else needed while I'm snowed in with nothing better to do.
I tend to keep all of my high-end electronics plugged into surge protectors . . . I'm curious if doing so could prevent something like this, or are surge protectors just a waste of money?Comment
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Re: Sanyo DP42849 - No Power At All
Surge protectors do very little unfortunately. They can help in some cases, so are probably worth having, but in most cases they don't do enough.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Sanyo DP42849 - No Power At All
Traced the circuit.Attached FilesPlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Sanyo DP42849 - No Power At All
Please test voltage across primary side of IC602, in standby and powered on.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Sanyo DP42849 - No Power At All
That's pretty amazing, Tom.
Do you mean test the 2 pins that are on the hot side of the board? If so, how do I do that?Attached FilesComment
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Re: Sanyo DP42849 - No Power At All
Yep - just check the voltage across them.
If the voltage goes from HIGH to LOW (figures will vary) the opto is working and that transistor is not, for some reason; if the voltage does not change, need to look at the opto and/or the circuit controlling it.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Sanyo DP42849 - No Power At All
So red lead on one pin and black lead on the other. Does it matter which is which?
Meter on DCV 20v?Comment
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Re: Sanyo DP42849 - No Power At All
DC20V. Orientation unimportant for nowPlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Sanyo DP42849 - No Power At All
Got 0 for standby and power.Comment
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Re: Sanyo DP42849 - No Power At All
Hmm, what do you measure on the other side of the device? COLD side only?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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