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It is currently 23 Apr 2024, 21:46
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jakeheke
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Post subject: Re: [DVL-919] RD/RA No Power Posted: 22 Jul 2021, 08:38 |
Advanced fan |
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Joined: 26 Jun 2019, 06:17 Posts: 576 Location: New Zealand Has thanked: 140 times Been thanked: 180 times
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drecksoft wrote: Just wanna say thanks for the instructions. I replaced C116 on a dead DVL-919 and temporarily bridged the blown P612 and it works again. I now ordered new fuses then hopefully everything will be OK again. awesome! Happy spinning
_________________ CLD-R7G CLD-D590 VSA-E07 AC3RF+DTS iScan DUO Processor Check out my small but loved collection here..
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drecksoft
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Post subject: Re: [DVL-919] RD/RA No Power Posted: 06 Aug 2021, 18:01 |
Honest fan |
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Joined: 13 Oct 2018, 12:06 Posts: 75 Location: Germany Has thanked: 4 times Been thanked: 10 times
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I now replaced all on the secondary side but still no -27V on the CN202 Any ideas where to continue the search?
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chente
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Post subject: Re: [DVL-919] RD/RA No Power Posted: 09 Nov 2021, 01:28 |
True fan |
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Joined: 07 Jan 2005, 00:46 Posts: 334 Location: San Diego, CA United States Has thanked: 2 times Been thanked: 2 times
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blam1 wrote: There are several pico fuses which look like resistors sprinkled around the power supply board. Any of these could be blown. You can't see it with the naked eye, you have to check for connectivity between the poles with a meter. P213, P612, P214, P511, P311 Coming back to this project after a long hiatus. - I've replaced all the caps, and double-checked polarity. - Verified with a MM that the main fuse and all the above listed pico fuses are still good. - Checked the diodes with the multimeter and of the 9 in the power assembly board most seem to be shorted with a small voltage drop rating in both directions. Only 3 of them showed the OL reading when reversed-biased. Next step is to replace the diodes once I figure out how to identify them. Does having this many bad diodes seem reasonable?
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cplusplus
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Post subject: Re: [DVL-919] RD/RA No Power Posted: 16 Nov 2021, 15:21 |
Hardcore fan |
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Joined: 13 Aug 2018, 03:18 Posts: 1520 Has thanked: 448 times Been thanked: 587 times
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chente wrote: Does having this many bad diodes seem reasonable? No, unless there was some catastrophic fault. Are you Maybe double check capacitance? i.e. to mix up 4.7 with 47. Outside of that, there are two electrolytics on FLKB on +5 EV. 47uF/6.3V
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chente
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Post subject: Re: [DVL-919] RD/RA No Power Posted: 17 Nov 2021, 03:32 |
True fan |
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Joined: 07 Jan 2005, 00:46 Posts: 334 Location: San Diego, CA United States Has thanked: 2 times Been thanked: 2 times
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Thank you for the response. I don’t understand the last sentence. Could you lease elaborate what FLKB means? I believe I already replaced all the capacitors but I will double check. cplusplus wrote: chente wrote: Does having this many bad diodes seem reasonable? No, unless there was some catastrophic fault. Are you Maybe double check capacitance? i.e. to mix up 4.7 with 47. Outside of that, there are two electrolytics on FLKB on +5 EV. 47uF/6.3V
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