I have two Yocto's, and am having a problem with the 5V line on one of my IO boards that I just can't figure out.
My Main Board #1 and Main Board #2 are both functioning 100% when used with my IO Board #2.
But my IO Board #1 causes the sequencers to malfunction and frequently reset itself or lockup. It had worked fine for awhile, but I may have damaged something at some point while working on mods or fixing wiring etc.
Measuring the voltage of IO board #1, all measures correctly when disconnected from Main Board: 5V, 15V, -15V... And the 5V line still measures 5V when the power cable is connected to the Main Board. But it drops to 4.5V when the sequencer cable is connected to the main board. (Specifically, it drops to 4.5V when ground is connected to the sequencer circuit.)
This only happens with one of my IO boards. IO Board #2 holds steady at 5V and powers each Main Board with no sequencer problems..so logic dictates the problem is on IO Board #1, but I can't figure out what is causing it. I replaced the 2sa733's for Trig2 & Trig3, double-checked the resistors, redid the cabling, and even pulled the 6n138 out completely for now but the 5v still drops to 4.5v...The capacitors look fine..Could a diode be failing? What am I missing?
It seems that I have enough observations to be guided by logic to where the problem is, especially since the circuit on the IO Board is so simple, but I'm really stumped...Perhaps it is the 6n138, and that's why removing it didn't change the symptoms, and I need to replace it...I only have 6n139's on hand though..
Any help at all hugely appreciated!
Power puzzle: 5V drops to 4.5V
I tried swapping a 6n139 for the 6n138, but my 5V still drops to 4.5V
This really seems like a current/power draw issue -- could the LM2596 be failing and no longer supplying 3A, causing the voltage drop when the sequencer increases the current being pulled? Seems like a long shot but I am desperate for a solution...
This really seems like a current/power draw issue -- could the LM2596 be failing and no longer supplying 3A, causing the voltage drop when the sequencer increases the current being pulled? Seems like a long shot but I am desperate for a solution...
-
e-licktronic Site Admin - Posts 519
- Joined: Feb 16th, '11, 13:36
pistrix wrote:I tried swapping a 6n139 for the 6n138, but my 5V still drops to 4.5V
This really seems like a current/power draw issue -- could the LM2596 be failing and no longer supplying 3A, causing the voltage drop when the sequencer increases the current being pulled? Seems like a long shot but I am desperate for a solution...
Have a look on 1N4004s and capacitors way on the IO board. Then it could be the LM2596.
Best regards,
e-licktronic
e-licktronic
Thanks for the reply !
The diodes and caps are all in correctly..I'm putting an order in for a replacement LM2596T today, hope it does the trick
The diodes and caps are all in correctly..I'm putting an order in for a replacement LM2596T today, hope it does the trick
well the new LM2596 didn't change anything
but i figured it out! after working backwards thru the 5V line on both of my IO boards, i found that the 680uf capacitor on the problem IO board was knocking the input voltage going to the LM2596 down to 8.3V...and it should be about 22V..i replaced it and finally i am back to steady 5V and correct working sequencer again...hurray!
but i figured it out! after working backwards thru the 5V line on both of my IO boards, i found that the 680uf capacitor on the problem IO board was knocking the input voltage going to the LM2596 down to 8.3V...and it should be about 22V..i replaced it and finally i am back to steady 5V and correct working sequencer again...hurray!
capitalone.com/activate is the secure site to activate your Capital One credit or debit card and enable account access.
capitalone.com/activate is the online portal where you can securely activate your new Capital One credit or debit card, set up online account access, manage card settings, and start using your card immediately for purchases.
It's the online capitalone.com/activate portal for activating new or replacement credit cards, where you'll link your card to your online account and confirm the 3-digit security code to start using it.
capitalone.com/activate is the online portal to quickly activate your Capital One credit or debit card, allowing you to start using it securely.
capitalone.com/activate is the online portal to quickly activate your Capital One credit or debit card, enabling you to start using it securely.
capitalone.com/activate is the online portal where you can securely activate your new Capital One credit or debit card, set up online account access, manage card settings, and start using your card immediately for purchases.
It's the online capitalone.com/activate portal for activating new or replacement credit cards, where you'll link your card to your online account and confirm the 3-digit security code to start using it.
capitalone.com/activate is the online portal to quickly activate your Capital One credit or debit card, allowing you to start using it securely.
capitalone.com/activate is the online portal to quickly activate your Capital One credit or debit card, enabling you to start using it securely.
capitalone.com/activate is the online portal to quickly activate your Capital One credit or debit card, enabling secure use for purchases.
capitalone.com/activate is the online portal to quickly activate your Capital One credit or debit card for immediate use.
capitalone.com/activate is the online portal to quickly activate your Capital One credit or debit card for immediate use.
capitalone.com/activate is the online portal for activating Capital One credit and debit cards. Users can securely enter their card information and personal details to activate their new cards, enabling them to make purchases, manage their accounts online, and access features like mobile banking, rewards tracking, and account alerts.
capitalone.com/activate lets you quickly activate your Capital One credit or debit card online.
capitalone.com/activate is the online portal to quickly activate your Capital One credit or debit card for immediate use.
capitalone.com/activate is the online portal to quickly activate your Capital One credit or debit card for immediate use.
capitalone.com/activate is the online portal for activating Capital One credit and debit cards. Users can securely enter their card information and personal details to activate their new cards, enabling them to make purchases, manage their accounts online, and access features like mobile banking, rewards tracking, and account alerts.
capitalone.com/activate lets you quickly activate your Capital One credit or debit card online.
capitalone.com/activate is Capital One’s online page for securely activating a new credit or debit card — enter your card details and follow the on-screen prompts.
Activate.uhc.com is UnitedHealthcare’s secure online portal where members can activate their health plan ID card and access a digital member ID. It also lets users verify identity, view basic coverage details, request or order replacement cards, and link their account for easier access to benefits and provider information.
Activate.uhc.com — UnitedHealthcare’s portal to quickly activate your member ID card online and view or manage card details.
Activate.uhc.com is UnitedHealthcare’s secure portal for activating and managing member ID cards online.Members can view or print their digital ID, request replacement cards, and access basic account details quickly.
Activate.uhc.com is UnitedHealthcare’s secure portal for activating and managing member ID cards online.Members can view or print their digital ID, request replacement cards, and access basic account details quickly.
Activate.uhc.com is the portal to quickly activate your UnitedHealthcare insurance card and access plan benefits.
Activate.uhc.com — UnitedHealthcare’s portal to quickly activate your member ID card online and view or manage card details.
Activate.uhc.com is UnitedHealthcare’s secure portal for activating and managing member ID cards online.Members can view or print their digital ID, request replacement cards, and access basic account details quickly.
Activate.uhc.com is UnitedHealthcare’s secure portal for activating and managing member ID cards online.Members can view or print their digital ID, request replacement cards, and access basic account details quickly.
Activate.uhc.com is the portal to quickly activate your UnitedHealthcare insurance card and access plan benefits.
Activate.uhc.com is UnitedHealthcare’s secure portal for activating and managing member ID cards online.Members can view or print their digital ID, request replacement cards, and access basic account details quickly.
Activate.uhc.com is UnitedHealthcare’s secure online portal where members can activate their health plan ID card, register or sign into their online account, and obtain a digital ID card for immediate use. The site also lets members view basic plan details, update contact information, choose how they receive their card, and access support — typically by verifying identity with your member ID and a few personal details (for example, date of birth and ZIP code).
Activate.uhc.com UnitedHealthcare’s secure portal to activate your member/ID card and access basic account details.
Activate.uhc.com lets UnitedHealthcare members quickly and securely activate and manage their insurance ID cards online for easy access to benefits.
Activate.uhc.com is the online UnitedHealthcare portal where members can activate their health insurance card, verify personal details, and gain access to their plan benefits. It provides a secure and convenient way to manage healthcare coverage, view resources, and start using services like prescriptions, claims, and wellness programs.
Activate.uhc.com is UnitedHealthcare’s secure online portal where members can activate their health plan ID card, register or sign into their online account, and obtain a digital ID card for immediate use. The site also lets members view basic plan details, update contact information, choose how they receive their card, and access support — typically by verifying identity with your member ID and a few personal details (for example, date of birth and ZIP code).
Activate.uhc.com UnitedHealthcare’s secure portal to activate your member/ID card and access basic account details.
Activate.uhc.com lets UnitedHealthcare members quickly and securely activate and manage their insurance ID cards online for easy access to benefits.
Activate.uhc.com is the online UnitedHealthcare portal where members can activate their health insurance card, verify personal details, and gain access to their plan benefits. It provides a secure and convenient way to manage healthcare coverage, view resources, and start using services like prescriptions, claims, and wellness programs.