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Thread Tools | Display Modes |
04-07-2021, 11:26 AM
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#21 |
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Member
Join Date: Aug 2016
City & State: NRW
My Country: germany
I'm a: Knowledge Seeker
Posts: 66
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Re: Hitachi Power LED flashing
Hello
MP3398A protection pin find, unfortunately google doesn't tell me much about this MP3398A chip many thanks Last edited by samtron786; 04-07-2021 at 11:31 AM.. |
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04-07-2021, 12:24 PM
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#22 |
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Badcaps Veteran
Join Date: Aug 2015
City & State: Cardiff
My Country: Wales
Line Voltage: 230V AC, 50Hz
I'm a: Hobbyist Tech
Posts: 6,544
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Re: Hitachi Power LED flashing
The data sheet says operating voltage between 5 to 28 volts, VCC pin = 6 volts, Enable pin =>1.8 volts
What voltages do you have?
__________________
Willing to help but I'm no expert. |
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04-07-2021, 01:07 PM
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#23 |
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Member
Join Date: Aug 2016
City & State: NRW
My Country: germany
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Re: Hitachi Power LED flashing
I can't measure that, I have to turn the power supply, but how? :-)
I have no problems with LED all are fine I have two Power supplies bought the same problem Find MP3398A protection pin Last edited by samtron786; 04-07-2021 at 01:11 PM.. |
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04-07-2021, 03:08 PM
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#24 |
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Badcaps Veteran
Join Date: Aug 2015
City & State: Cardiff
My Country: Wales
Line Voltage: 230V AC, 50Hz
I'm a: Hobbyist Tech
Posts: 6,544
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Re: Hitachi Power LED flashing
If the leds are fine then what is the problem?
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04-08-2021, 01:47 AM
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#25 |
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Member
Join Date: Aug 2016
City & State: NRW
My Country: germany
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Re: Hitachi Power LED flashing
hello i have found something in google with power supply not the place, can you please mark the place for me?
ISET two resistors 5.09 K ohm and 4.68 K ohm Try the 6th leg (ISET) to increase resistance. Instead of 7 kOhm, use 12 kOhm, the current drops and the voltage protection no longer works. Last edited by samtron786; 04-08-2021 at 01:52 AM.. |
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04-08-2021, 02:47 AM
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#26 |
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Badcaps Veteran
Join Date: Aug 2014
City & State: Vologda
My Country: Russia
Line Voltage: 230VAC 50Hz
I'm a: Knowledge Seeker
Posts: 481
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Re: Hitachi Power LED flashing
Hi,
Remove the resistor 4701 from the red circle and solder it instead for example resistor 103 |
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04-08-2021, 03:22 AM
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#27 | |
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Member
Join Date: Aug 2016
City & State: NRW
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Re: Hitachi Power LED flashing
Quote:
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04-08-2021, 04:50 AM
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#28 |
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Member
Join Date: Aug 2016
City & State: NRW
My Country: germany
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Re: Hitachi Power LED flashing
Unfortunately that didn't help me
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04-10-2021, 03:16 AM
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#29 |
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Member
Join Date: Aug 2016
City & State: NRW
My Country: germany
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Posts: 66
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Re: Hitachi Power LED flashing
I tested the LED again, they are all fine
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Linear Mode
