Symfony Profiler

Security

Token

There is no security token.

Firewall

main Name

Security enabled

Stateless

Configuration

Key	Value
provider	security.user.provider.concrete.app_user_provider
context	main
entry_point	App\Security\KbinAuthenticator
user_checker	App\Security\UserChecker
access_denied_handler	(none)
access_denied_url	(none)
authenticators	[`"two_factor" "remember_me" "App\Security\KbinAuthenticator" "App\Security\FacebookAuthenticator" "App\Security\GoogleAuthenticator" "App\Security\GithubAuthenticator" "App\Security\KeycloakAuthenticator"`]

Listeners

Listener	Duration	Response
Symfony\Component\Security\Http\Firewall\ChannelListener {#723`-map: Symfony\Component\Security\Http\AccessMap {#722 …} -logger: Monolog\Logger {#783 …} -httpPort: 80 -httpsPort: 443`}	0.00 ms	(none)
Symfony\Component\Security\Http\Firewall\ContextListener {#706-tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage {#1017 …} -sessionKey: "_security_main" -logger: Monolog\Logger {#783 …} -userProviders: Symfony\Component\DependencyInjection\Argument\RewindableGenerator {#705 …} -dispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …} -registered: false -trustResolver: Scheb\TwoFactorBundle\Security\Authentication\AuthenticationTrustResolver {#780 …} -sessionTrackerEnabler: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage::enableUsageTracking(): void {#703 …}}	0.17 ms	(none)
Symfony\Component\Security\Http\Firewall\AuthenticatorManagerListener {#584`-authenticatorManager: Symfony\Component\Security\Http\Authentication\AuthenticatorManager {#595 …}`}	0.00 ms	(none)
Scheb\TwoFactorBundle\Security\Http\Firewall\TwoFactorAccessListener {#582`-twoFactorFirewallConfig: Scheb\TwoFactorBundle\Security\TwoFactor\TwoFactorFirewallConfig {#842 …} -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …} -twoFactorAccessDecider: Scheb\TwoFactorBundle\Security\Authorization\TwoFactorAccessDecider {#581 …}`}	0.04 ms	(none)
Symfony\Component\Security\Http\Firewall\AccessListener {#579`-tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …} -accessDecisionManager: Symfony\Component\Security\Core\Authorization\TraceableAccessDecisionManager {#937 …} -map: Symfony\Component\Security\Http\AccessMap {#722 …}`}	0.00 ms	(none)
Symfony\Component\Security\Http\Firewall\LogoutListener {#786`-tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …} -options: [ "csrf_parameter" => "_csrf_token" "csrf_token_id" => "logout" "logout_path" => "app_logout" ] -httpUtils: Symfony\Component\Security\Http\HttpUtils {#841 …} -csrfTokenManager: Symfony\Component\Security\Csrf\CsrfTokenManager {#1015 …} -eventDispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …}`}	0.00 ms	(none)

Authenticators

No authenticators have been recorded. Check previous profiles on your authentication endpoint.

Access Decision

affirmative Strategy


"Symfony\Component\Security\Core\Authorization\Voter\AuthenticatedVoter"
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
"Symfony\Component\Security\Core\Authorization\Voter\ExpressionVoter"
"App\Security\Voter\EntryCommentVoter"
"App\Security\Voter\EntryVoter"
"App\Security\Voter\MagazineVoter"
"App\Security\Voter\MessageThreadVoter"
"App\Security\Voter\MessageVoter"
"App\Security\Voter\NotificationVoter"
"App\Security\Voter\OAuth2UserConsentVoter"
"App\Security\Voter\PostCommentVoter"
"App\Security\Voter\PostVoter"
"App\Security\Voter\UserVoter"

#	Voter class
1	"Symfony\Component\Security\Core\Authorization\Voter\AuthenticatedVoter"
2	"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
3	"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
4	"Symfony\Component\Security\Core\Authorization\Voter\ExpressionVoter"
5	"App\Security\Voter\EntryCommentVoter"
6	"App\Security\Voter\EntryVoter"
7	"App\Security\Voter\MagazineVoter"
8	"App\Security\Voter\MessageThreadVoter"
9	"App\Security\Voter\MessageVoter"
10	"App\Security\Voter\NotificationVoter"
11	"App\Security\Voter\OAuth2UserConsentVoter"
12	"App\Security\Voter\PostCommentVoter"
13	"App\Security\Voter\PostVoter"
14	"App\Security\Voter\UserVoter"

Access decision log


null
"App\Security\Voter\UserVoter"
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  +magazine: App\Entity\Magazine {#266
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      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
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      \n
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      \n
      3: No commercial stuff, buying, selling or valuations.\n
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  +slug: "Mixer-makes-loud-pop-when-powered-on"
  +title: "Mixer makes loud pop when powered on"
  +url: null
  +body: """
    Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
    \n
    I could not find a schematic, but I don’t assume it can’t be found, I just haven’t yet. It’s not a big board but it’s all analog from what I can see.\n
    \n
    There appears to be a separate power supply board which feeds\n
    \n
    +15 AGND -15 GND +48\n
    \n
    to the mixer, which is two boards connected by thick soldered wires.\n
    \n
    I have looked with magnifiers on at all the caps, none appear to be leaky or swole, but I’m assuming this has *something* to do with the power supply putting out a spike at power on. The power board has a lot of really tiny caps, I still don’t really understand power supplies that well. I need to do more studying of them I suppose, they’re pretty central.\n
    \n
    Edit: I have a little tiny oscilloscope that I bought years ago and haven’t used yet, just figured the day would come. This is probably that day, to measure that spike from the power supply. From the looks of it I’m pretty sure that if I can just get better quality, non-spiking power to those connectors it should be fine.\n
    \n
    Anyways this board would be very handy right this second if I felt like it was safe to let it touch my good kids, but at the moment it’s the unfavored child who won’t stop hitting the others. If anyone would like to see them I have/can take photos. The boards have codes on them, presumably codes that Mackie employees could use to dig up schematics, but will they? I suppose I’ll try to find out today. It’s past warranty of course.
    """
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    date: 2023-10-05 14:51:29.0 +02:00
  }
  +createdAt: DateTimeImmutable @1696509960 {#2420
    date: 2023-10-05 14:46:00.0 +02:00
  }
}
"App\Security\Voter\UserVoter"
App\Entity\Entry {#2412
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  +magazine: App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
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    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
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  +url: null
  +body: """
    Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
    \n
    I could not find a schematic, but I don’t assume it can’t be found, I just haven’t yet. It’s not a big board but it’s all analog from what I can see.\n
    \n
    There appears to be a separate power supply board which feeds\n
    \n
    +15 AGND -15 GND +48\n
    \n
    to the mixer, which is two boards connected by thick soldered wires.\n
    \n
    I have looked with magnifiers on at all the caps, none appear to be leaky or swole, but I’m assuming this has *something* to do with the power supply putting out a spike at power on. The power board has a lot of really tiny caps, I still don’t really understand power supplies that well. I need to do more studying of them I suppose, they’re pretty central.\n
    \n
    Edit: I have a little tiny oscilloscope that I bought years ago and haven’t used yet, just figured the day would come. This is probably that day, to measure that spike from the power supply. From the looks of it I’m pretty sure that if I can just get better quality, non-spiking power to those connectors it should be fine.\n
    \n
    Anyways this board would be very handy right this second if I felt like it was safe to let it touch my good kids, but at the moment it’s the unfavored child who won’t stop hitting the others. If anyone would like to see them I have/can take photos. The boards have codes on them, presumably codes that Mackie employees could use to dig up schematics, but will they? I suppose I’ll try to find out today. It’s past warranty of course.
    """
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  -titleTs: "'loud':3 'make':2 'mixer':1 'pop':4 'power':6"
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}
"App\Security\Voter\UserVoter"
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    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
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      ---
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  +title: "Mixer makes loud pop when powered on"
  +url: null
  +body: """
    Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
    \n
    I could not find a schematic, but I don’t assume it can’t be found, I just haven’t yet. It’s not a big board but it’s all analog from what I can see.\n
    \n
    There appears to be a separate power supply board which feeds\n
    \n
    +15 AGND -15 GND +48\n
    \n
    to the mixer, which is two boards connected by thick soldered wires.\n
    \n
    I have looked with magnifiers on at all the caps, none appear to be leaky or swole, but I’m assuming this has *something* to do with the power supply putting out a spike at power on. The power board has a lot of really tiny caps, I still don’t really understand power supplies that well. I need to do more studying of them I suppose, they’re pretty central.\n
    \n
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      Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
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      I could not find a schematic, but I don’t assume it can’t be found, I just haven’t yet. It’s not a big board but it’s all analog from what I can see.\n
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      \n
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      \n
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      Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
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      I could not find a schematic, but I don’t assume it can’t be found, I just haven’t yet. It’s not a big board but it’s all analog from what I can see.\n
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      \n
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      \n
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      Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
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      I could not find a schematic, but I don’t assume it can’t be found, I just haven’t yet. It’s not a big board but it’s all analog from what I can see.\n
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      \n
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      Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
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      Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
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      \n
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    -i live in the country, power outages happen, I cannot reliably prevent things from turning on all at once.\n
    \n
    -my other mixers make noise when turned on, but they are not loud enough to kill speakers; even so I do try to turn things on in the proper order. This one is dangerously exceptional and won’t be used if this can’t be fixed.
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      Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
      \n
      I could not find a schematic, but I don’t assume it can’t be found, I just haven’t yet. It’s not a big board but it’s all analog from what I can see.\n
      \n
      There appears to be a separate power supply board which feeds\n
      \n
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      \n
      to the mixer, which is two boards connected by thick soldered wires.\n
      \n
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      \n
      Edit: I have a little tiny oscilloscope that I bought years ago and haven’t used yet, just figured the day would come. This is probably that day, to measure that spike from the power supply. From the looks of it I’m pretty sure that if I can just get better quality, non-spiking power to those connectors it should be fine.\n
      \n
      Anyways this board would be very handy right this second if I felt like it was safe to let it touch my good kids, but at the moment it’s the unfavored child who won’t stop hitting the others. If anyone would like to see them I have/can take photos. The boards have codes on them, presumably codes that Mackie employees could use to dig up schematics, but will they? I suppose I’ll try to find out today. It’s past warranty of course.
      """
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    -i live in the country, power outages happen, I cannot reliably prevent things from turning on all at once.\n
    \n
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      Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
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      I could not find a schematic, but I don’t assume it can’t be found, I just haven’t yet. It’s not a big board but it’s all analog from what I can see.\n
      \n
      There appears to be a separate power supply board which feeds\n
      \n
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      I have looked with magnifiers on at all the caps, none appear to be leaky or swole, but I’m assuming this has *something* to do with the power supply putting out a spike at power on. The power board has a lot of really tiny caps, I still don’t really understand power supplies that well. I need to do more studying of them I suppose, they’re pretty central.\n
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    -i live in the country, power outages happen, I cannot reliably prevent things from turning on all at once.\n
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      Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
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      \n
      I have looked with magnifiers on at all the caps, none appear to be leaky or swole, but I’m assuming this has *something* to do with the power supply putting out a spike at power on. The power board has a lot of really tiny caps, I still don’t really understand power supplies that well. I need to do more studying of them I suppose, they’re pretty central.\n
      \n
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      \n
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      """
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      -i live in the country, power outages happen, I cannot reliably prevent things from turning on all at once.\n
      \n
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      Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
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      I could not find a schematic, but I don’t assume it can’t be found, I just haven’t yet. It’s not a big board but it’s all analog from what I can see.\n
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      -i live in the country, power outages happen, I cannot reliably prevent things from turning on all at once.\n
      \n
      -my other mixers make noise when turned on, but they are not loud enough to kill speakers; even so I do try to turn things on in the proper order. This one is dangerously exceptional and won’t be used if this can’t be fixed.
      """
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    +body: """
      Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
      \n
      I could not find a schematic, but I don’t assume it can’t be found, I just haven’t yet. It’s not a big board but it’s all analog from what I can see.\n
      \n
      There appears to be a separate power supply board which feeds\n
      \n
      +15 AGND -15 GND +48\n
      \n
      to the mixer, which is two boards connected by thick soldered wires.\n
      \n
      I have looked with magnifiers on at all the caps, none appear to be leaky or swole, but I’m assuming this has *something* to do with the power supply putting out a spike at power on. The power board has a lot of really tiny caps, I still don’t really understand power supplies that well. I need to do more studying of them I suppose, they’re pretty central.\n
      \n
      Edit: I have a little tiny oscilloscope that I bought years ago and haven’t used yet, just figured the day would come. This is probably that day, to measure that spike from the power supply. From the looks of it I’m pretty sure that if I can just get better quality, non-spiking power to those connectors it should be fine.\n
      \n
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      """
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      +body: "Yep, seconded. Those older mixers all do that. Power on your amps after powering on your mixer."
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      -i live in the country, power outages happen, I cannot reliably prevent things from turning on all at once.\n
      \n
      -my other mixers make noise when turned on, but they are not loud enough to kill speakers; even so I do try to turn things on in the proper order. This one is dangerously exceptional and won’t be used if this can’t be fixed.
      """
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  +body: "There are timing relays for under $50 that can delay the power to the amps for a few seconds. You just need to buy a 230V model (for input and switch) that has the current capacity for your sound system."
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        \n
        Rules\n
        -----\n
        \n
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        \n
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        \n
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        \n
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      Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
      \n
      I could not find a schematic, but I don’t assume it can’t be found, I just haven’t yet. It’s not a big board but it’s all analog from what I can see.\n
      \n
      There appears to be a separate power supply board which feeds\n
      \n
      +15 AGND -15 GND +48\n
      \n
      to the mixer, which is two boards connected by thick soldered wires.\n
      \n
      I have looked with magnifiers on at all the caps, none appear to be leaky or swole, but I’m assuming this has *something* to do with the power supply putting out a spike at power on. The power board has a lot of really tiny caps, I still don’t really understand power supplies that well. I need to do more studying of them I suppose, they’re pretty central.\n
      \n
      Edit: I have a little tiny oscilloscope that I bought years ago and haven’t used yet, just figured the day would come. This is probably that day, to measure that spike from the power supply. From the looks of it I’m pretty sure that if I can just get better quality, non-spiking power to those connectors it should be fine.\n
      \n
      Anyways this board would be very handy right this second if I felt like it was safe to let it touch my good kids, but at the moment it’s the unfavored child who won’t stop hitting the others. If anyone would like to see them I have/can take photos. The boards have codes on them, presumably codes that Mackie employees could use to dig up schematics, but will they? I suppose I’ll try to find out today. It’s past warranty of course.
      """
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    Hi there,\n
    \n
    Based on the experience I gathered in repair cafes:\n
    \n
    - Some old power switches generate an arc (spark?) when flipping them. Cleaning their insides with an "electrical contact cleaner" spray can sometimes help.\n
    - Defective electrochemical capacitors do NOT always swell or leak. If it is worth it swap them all for new ones (We sometimes desolder what we think are good ones from dead appliances to be re-used).\n
    - All domestic appliances around here (France) have an "anti surge" (?) capacitor soldered just after the power cable and power switch. If I understand it correctly, its job is to prevent a "parasitic" current spike to travel back on the domestic electric network when the equipment is switched on. That's the one I would replace in priority to see if it fixes your problem.\n
    \n
    Disclaimer : I have no degree in electronics / electrical installations. Take what is above with a grain a salt as I might be dead wrong.  \n
     Always unplug the appliance from the mains before tinkering and discharge ALL the capacitors which are on the 110 V /220 V side of the electronics before touching the PCB on which they are soldered.\n
    \n
    Good luck with your repair. It would be nice and helpful if you have a chance to post some pictures :)
    """
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      +description: """
        **For questions about component-level electronic circuits, tools and equipment.**\n
        \n
        Rules\n
        -----\n
        \n
        1: Be nice.\n
        \n
        2: Be on-topic (eg: *Electronic*, not *electrical*).\n
        \n
        3: No commercial stuff, buying, selling or valuations.\n
        \n
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        \n
        ---
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      Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
      \n
      I could not find a schematic, but I don’t assume it can’t be found, I just haven’t yet. It’s not a big board but it’s all analog from what I can see.\n
      \n
      There appears to be a separate power supply board which feeds\n
      \n
      +15 AGND -15 GND +48\n
      \n
      to the mixer, which is two boards connected by thick soldered wires.\n
      \n
      I have looked with magnifiers on at all the caps, none appear to be leaky or swole, but I’m assuming this has *something* to do with the power supply putting out a spike at power on. The power board has a lot of really tiny caps, I still don’t really understand power supplies that well. I need to do more studying of them I suppose, they’re pretty central.\n
      \n
      Edit: I have a little tiny oscilloscope that I bought years ago and haven’t used yet, just figured the day would come. This is probably that day, to measure that spike from the power supply. From the looks of it I’m pretty sure that if I can just get better quality, non-spiking power to those connectors it should be fine.\n
      \n
      Anyways this board would be very handy right this second if I felt like it was safe to let it touch my good kids, but at the moment it’s the unfavored child who won’t stop hitting the others. If anyone would like to see them I have/can take photos. The boards have codes on them, presumably codes that Mackie employees could use to dig up schematics, but will they? I suppose I’ll try to find out today. It’s past warranty of course.
      """
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      date: 2023-10-05 14:46:00.0 +02:00
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  }
  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: null
  +root: null
  +body: """
    Hi there,\n
    \n
    Based on the experience I gathered in repair cafes:\n
    \n
    - Some old power switches generate an arc (spark?) when flipping them. Cleaning their insides with an "electrical contact cleaner" spray can sometimes help.\n
    - Defective electrochemical capacitors do NOT always swell or leak. If it is worth it swap them all for new ones (We sometimes desolder what we think are good ones from dead appliances to be re-used).\n
    - All domestic appliances around here (France) have an "anti surge" (?) capacitor soldered just after the power cable and power switch. If I understand it correctly, its job is to prevent a "parasitic" current spike to travel back on the domestic electric network when the equipment is switched on. That's the one I would replace in priority to see if it fixes your problem.\n
    \n
    Disclaimer : I have no degree in electronics / electrical installations. Take what is above with a grain a salt as I might be dead wrong.  \n
     Always unplug the appliance from the mains before tinkering and discharge ALL the capacitors which are on the 110 V /220 V side of the electronics before touching the PCB on which they are soldered.\n
    \n
    Good luck with your repair. It would be nice and helpful if you have a chance to post some pictures :)
    """
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"App\Security\Voter\UserVoter"
App\Entity\EntryComment {#4101
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  +entry: App\Entity\Entry {#2412
    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "askelectronics@discuss.tchncs.de"
      +title: "askelectronics"
      +description: """
        **For questions about component-level electronic circuits, tools and equipment.**\n
        \n
        Rules\n
        -----\n
        \n
        1: Be nice.\n
        \n
        2: Be on-topic (eg: *Electronic*, not *electrical*).\n
        \n
        3: No commercial stuff, buying, selling or valuations.\n
        \n
        4: Be safe.\n
        \n
        ---
        """
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    }
    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "Mixer-makes-loud-pop-when-powered-on"
    +title: "Mixer makes loud pop when powered on"
    +url: null
    +body: """
      Hey folks, I have a Mackie 802-VLZ4 mixer which does this narsty pop when you turn it on; I’m pretty sure it’s what killed one of the woofers in my monitors. It has been put out of service and I will either harvest its many through-hole organs or else fix it.\n
      \n
      I could not find a schematic, but I don’t assume it can’t be found, I just haven’t yet. It’s not a big board but it’s all analog from what I can see.\n
      \n
      There appears to be a separate power supply board which feeds\n
      \n
      +15 AGND -15 GND +48\n
      \n
      to the mixer, which is two boards connected by thick soldered wires.\n
      \n
      I have looked with magnifiers on at all the caps, none appear to be leaky or swole, but I’m assuming this has *something* to do with the power supply putting out a spike at power on. The power board has a lot of really tiny caps, I still don’t really understand power supplies that well. I need to do more studying of them I suppose, they’re pretty central.\n
      \n
      Edit: I have a little tiny oscilloscope that I bought years ago and haven’t used yet, just figured the day would come. This is probably that day, to measure that spike from the power supply. From the looks of it I’m pretty sure that if I can just get better quality, non-spiking power to those connectors it should be fine.\n
      \n
      Anyways this board would be very handy right this second if I felt like it was safe to let it touch my good kids, but at the moment it’s the unfavored child who won’t stop hitting the others. If anyone would like to see them I have/can take photos. The boards have codes on them, presumably codes that Mackie employees could use to dig up schematics, but will they? I suppose I’ll try to find out today. It’s past warranty of course.
      """
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    +lang: "en"
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    +hasEmbed: false
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    }
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      date: 2023-10-05 14:46:00.0 +02:00
    }
  }
  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: null
  +root: null
  +body: """
    Hi there,\n
    \n
    Based on the experience I gathered in repair cafes:\n
    \n
    - Some old power switches generate an arc (spark?) when flipping them. Cleaning their insides with an "electrical contact cleaner" spray can sometimes help.\n
    - Defective electrochemical capacitors do NOT always swell or leak. If it is worth it swap them all for new ones (We sometimes desolder what we think are good ones from dead appliances to be re-used).\n
    - All domestic appliances around here (France) have an "anti surge" (?) capacitor soldered just after the power cable and power switch. If I understand it correctly, its job is to prevent a "parasitic" current spike to travel back on the domestic electric network when the equipment is switched on. That's the one I would replace in priority to see if it fixes your problem.\n
    \n
    Disclaimer : I have no degree in electronics / electrical installations. Take what is above with a grain a salt as I might be dead wrong.  \n
     Always unplug the appliance from the mains before tinkering and discharge ALL the capacitors which are on the 110 V /220 V side of the electronics before touching the PCB on which they are soldered.\n
    \n
    Good luck with your repair. It would be nice and helpful if you have a chance to post some pictures :)
    """
  +lang: "en"
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    date: 2023-10-06 10:48:42.0 +02:00
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}
"App\Security\Voter\UserVoter"
App\Entity\Magazine {#266
  +icon: Proxies\__CG__\App\Entity\Image {#247 …}
  +name: "askelectronics@discuss.tchncs.de"
  +title: "askelectronics"
  +description: """
    **For questions about component-level electronic circuits, tools and equipment.**\n
    \n
    Rules\n
    -----\n
    \n
    1: Be nice.\n
    \n
    2: Be on-topic (eg: *Electronic*, not *electrical*).\n
    \n
    3: No commercial stuff, buying, selling or valuations.\n
    \n
    4: Be safe.\n
    \n
    ---
    """
  +rules: null
  +subscriptionsCount: 1
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  +postCommentCount: 4
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  +customCss: null
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    date: 2024-10-20 10:40:08.0 +02:00
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  +markedForDeletionAt: null
  +tags: null
  +moderators: Doctrine\ORM\PersistentCollection {#238 …}
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"App\Security\Voter\UserVoter"

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