I'm trying to fix my Harman kardon AVR 310. Fuses FU484 and FU483 (on main board) are both blown. Unit powers up, but no sound and some front panel lights not working. I've tested all of the capacitors on the main board with my ESR meter, and 7 showed [in circuit / leaky] I removed 6 out of the 7 (one was super hard to get to) and they all tested fine. I also tested the caps on the stand by board, and found one at the top that was a cold solder joint, but I'm not sure if that had anything to do with the fused blowing or not. I also tested the 4 large diodes right after the fuses and those seem to be good as well. I'm wondering where to go from here. Anybody else run into this problem? Any help would be much appreciated. (I'm kind of a novice at electronics FYI) Thank you.
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Re: Harman kardon AVR 310 blow fuses
Please post pictures of the inside, especially area around those fuses and area with output power components. -
Re: Harman kardon AVR 310 blow fuses
Service manual: https://www.manualslib.com/download/...on-Avr310.html
1) So the blown fuses FU484 and FU483 are on the Main Amp board, PDF page 121.
2) Did you check D568, 569, 570, 571?
3) Did you check the resistance between GND (of that section of the power supply ) and the output side of the blown fuses to see if it shows low resistance?
4) Good clear of the pictures will also help.Attached FilesLast edited by budm; 04-02-2020, 06:18 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Harman kardon AVR 310 blow fuses
Hi, thank you for replying. Sorry I didn't reply sooner, I didn't get notifications for some reason. Yes, I checked checked those 4 diodes with the diode checker on my DMM, and they seem to be fine. The resistance between the fuses and ground, measures about 3.7 mega ohm. I uploaded some pics, let me know if there is an area that you need better pics of.Attached FilesLast edited by freethink; 04-16-2020, 05:50 AM.Comment
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TE Circuit Protection offers the widest selection of surface-mount fuses available for addressing a broad range of overcurrent protection applications. Helping to prevent costly damage and promote a safe environment for electronic and electrical equipment, our single-use chip fuses provide performance stability to support applications with current ratings from .5A up to 20A.
TE Circuit Protection also offers the telecom FT600 fuse for telecommunications applications. This telecom fuse helps comply with North American overcurrent protection requirements, including Telcordia, GR-1089,...10-07-2024, 06:07 AM -
Cant find what smd code Y0DVA.
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Harman Kardon AVR 3700 burned, it does not turn on and I have already changed the fuse and when turned on it burns again. It must be shorted.
I made a new Diagnostic and verified that the input source is shorted.
Someone help
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