Re: Sharp LC-60SQ15U TV DPS-167CP - No power
Where should the voltage come from on the 5th leg A6069H?
Where should the voltage come from on the 5th leg A6069H?
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
looks like it comes from c7901.Comment
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
I see, ok check c7906, r7909, r7919, d7904.Comment
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
make sure the resistors are the correct value and not open.Comment
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
Why??
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
9.1 Startup Operation
Figure 9-1 shows the circuit around IC. Figure 9-2
shows the start up operation.
The IC incorporates the startup circuit. The circuit is
connected to D/ST pin. When D/ST pin voltage reaches
to Startup Circuit Operation Voltage VST(ON) = 38 V, the
startup circuit starts operation.
During the startup process, the constant current,
ISTARTUP = − 2.5 mA, charges C2 at VCC pin. When
VCC pin voltage increases to VCC(ON) = 15.3 V, the
control circuit starts operationI assume no responsibility for any stupid suggestions I might post.Comment
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
CAP c2 (C7907) i change but nothing changedComment
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
Check pin 5 diode, resistor and cap.I assume no responsibility for any stupid suggestions I might post.Comment
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
If all components off of pin5 are good. May have bad ic.I assume no responsibility for any stupid suggestions I might post.Comment
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
What is the voltage on pin 4 of ic7903, this is the FB (feedback) voltage.
Is R7907 ok?
IC7801 will not effect ic7903. IC7801 is the pfc driver ic. and is not active in standbyLast edited by R_J; 05-19-2022, 11:38 AM.Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hi all!
I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅
I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
https://www.badcaps.net/forum/troubl...-hardware-devi... -
Hi all,
TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!
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I want to know if I could hook up a solar panels to this boost converter would I have any issues doing and I would have issues what would they be
Adjustable Boost Power Supply DC-DC Constant Voltage Current Charging Module
https://www.ebay.com/itm/116497313155?var=416785404161
Here are some of the description from the eBay seller
The main parameters:
1. Product name: High-power non-isolated DC boost module power supply.
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