What Should I Do Next?
jbreezy5
Posts: 1,141
Hi All, I recently posted about my Yamaha KX-530 blowing a fuse...
Well, I tried a replacement fuse, and immediately upon pressing the power button, danged if the same thing didn’t happen!
Anyone know how to diagnose the problem and steps to fix?
The good: I put my Yamaha K-902 in the bedroom system today and it sounds great! 😀
The bad: I did the above, because my Yamaha KX-530 seems to have gone to cassette deck heaven, judging by failed electronic response and the subsequently smoky scent that follows it. This means no more remote control and track-to-track search convenience. 😢
...and sometimes a guy gets lucky! Popped the top of the KX-530, and it looks like just a blown fuse.
For those who are fans of guts and explosions (exceedingly small 😁) here are some pics:
now the question is what blew the fuse.
Well, I tried a replacement fuse, and immediately upon pressing the power button, danged if the same thing didn’t happen!
Anyone know how to diagnose the problem and steps to fix?
CD Players: Sony CDP-211; Sony DVP-S9000ES; Sony UDP-X800M2 (x2); Cambridge Audio CXC
DACs: Jolida Glass FX Tube DAC III (x2); Denafrips Ares II (x2)
Streamers: ROKU (x3); Bluesound Node 2i and Node N130 w/LHY LPS // Receivers: Yamaha RX-V775BT; Yamaha RX-V777
Preamps: B&K Ref 50; B&K Ref 5 S2; Classe CP-800 MkII; Audio Research SP16L (soon)
Amps: Niles SI-275; B&K ST125.7; B&K ST125.2; Classe CA-2300; Butler Audio TDB-5150
Speakers: Boston Acoustics CR55; Focal Chorus 705v; Wharfedale Diamond 10.2; Monitor Audio Silver-1; Def Tech Mythos One (x4)/Mythos Three Center (x2)/Mythos Two pr.; Martin Logan Electromotion ESL; Legacy Audio Victoria/Silverscreen Center; Gallo Acoustics Reference 3.1; SVS SB-1000 Pro; REL HT-1003; B&W ASW610; HifiMan HE400i
Turntable: Dual 721 Direct-Drive w/Audio Technica AT-VM95e cart
Cables: Tripp-lite 14ga. PCs, Blue Jeans Cable ICs, Philips PXT1000 ICs; Kimber Kable DV30 coaxial ICs; Canare L-4E6S XLR ICs; Kimber Kable 8PR & 8TC speaker cables.
DACs: Jolida Glass FX Tube DAC III (x2); Denafrips Ares II (x2)
Streamers: ROKU (x3); Bluesound Node 2i and Node N130 w/LHY LPS // Receivers: Yamaha RX-V775BT; Yamaha RX-V777
Preamps: B&K Ref 50; B&K Ref 5 S2; Classe CP-800 MkII; Audio Research SP16L (soon)
Amps: Niles SI-275; B&K ST125.7; B&K ST125.2; Classe CA-2300; Butler Audio TDB-5150
Speakers: Boston Acoustics CR55; Focal Chorus 705v; Wharfedale Diamond 10.2; Monitor Audio Silver-1; Def Tech Mythos One (x4)/Mythos Three Center (x2)/Mythos Two pr.; Martin Logan Electromotion ESL; Legacy Audio Victoria/Silverscreen Center; Gallo Acoustics Reference 3.1; SVS SB-1000 Pro; REL HT-1003; B&W ASW610; HifiMan HE400i
Turntable: Dual 721 Direct-Drive w/Audio Technica AT-VM95e cart
Cables: Tripp-lite 14ga. PCs, Blue Jeans Cable ICs, Philips PXT1000 ICs; Kimber Kable DV30 coaxial ICs; Canare L-4E6S XLR ICs; Kimber Kable 8PR & 8TC speaker cables.
Comments
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Something is shorted upstream of the fuse (I assume that's the "mains" fuse?).
Most likely culprits, IMO, would be the rectifier(s) -- probably either a full-wave bridge or four discrete power diodes, the main power supply filter capacitors, or, perhaps (and most vexing), a shorted winding in the power transformer.
If it is none of those, it could be pretty much anything, but it's almost certainly a shorted component.
One thing that's always possible is a "trivial" short circuit -- two connectors touching someplace, or a bare spot on the power cord inside the component that's shorting to ground or some other place it shouldn't be. Careful visual inspection is always in good taste.
If there's a dead short, you should be able to find it with a DMM and some patient sleuthing, working backwards from where the power cord's leads connect to the power supply.
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The nice folks at hifiengine have the SM for this deck; the schematic's not too clear, but could be helpful You can see the power supply section on the lower right.
https://www.hifiengine.com/manual_library/yamaha/kx-530.shtml
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Ty sir!CD Players: Sony CDP-211; Sony DVP-S9000ES; Sony UDP-X800M2 (x2); Cambridge Audio CXC
DACs: Jolida Glass FX Tube DAC III (x2); Denafrips Ares II (x2)
Streamers: ROKU (x3); Bluesound Node 2i and Node N130 w/LHY LPS // Receivers: Yamaha RX-V775BT; Yamaha RX-V777
Preamps: B&K Ref 50; B&K Ref 5 S2; Classe CP-800 MkII; Audio Research SP16L (soon)
Amps: Niles SI-275; B&K ST125.7; B&K ST125.2; Classe CA-2300; Butler Audio TDB-5150
Speakers: Boston Acoustics CR55; Focal Chorus 705v; Wharfedale Diamond 10.2; Monitor Audio Silver-1; Def Tech Mythos One (x4)/Mythos Three Center (x2)/Mythos Two pr.; Martin Logan Electromotion ESL; Legacy Audio Victoria/Silverscreen Center; Gallo Acoustics Reference 3.1; SVS SB-1000 Pro; REL HT-1003; B&W ASW610; HifiMan HE400i
Turntable: Dual 721 Direct-Drive w/Audio Technica AT-VM95e cart
Cables: Tripp-lite 14ga. PCs, Blue Jeans Cable ICs, Philips PXT1000 ICs; Kimber Kable DV30 coaxial ICs; Canare L-4E6S XLR ICs; Kimber Kable 8PR & 8TC speaker cables.
