Re: Cross reference for B90N08
U1 is OB3362HP. Can this be replaced with anything else. I see few on eBay from China or Thailand, but picture does not match .
ned1
Senior Member
Last Activity: 09-13-2016, 06:04 AM
Joined: 02-21-2014
Location: texas
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Re: Cross reference for B90N08
That will be U1 I am assumingLeave a comment:
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Re: Cross reference for B90N08
No it starts at 23V when plugged in and goes up to 25V slowlyLeave a comment:
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Re: Cross reference for B90N08
I don't have led connectors plugged, I removed entire board soldered 1k resistor from 5v to ENA and plugged the power cable to the boardLeave a comment:
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Re: Cross reference for B90N08
Found 1 1k resistor and have it soldered from 5V to ENA. With power on I am getting 25V to VIN pins , 3V to LED4 and no voltage on other LED1, LED2 and LED3 pins.Leave a comment:
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Re: Cross reference for B90N08
I did not do test with 1k resistor yet, just wanted to give what each pin is on the board.Leave a comment:
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Re: Cross reference for B90N08
The other connector that I measured 25V is labeled as
LED1
LED2
VIN
VIN
LED3
LED4
The 25 volts I see is at the VIN pins.Leave a comment:
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Re: Cross reference for B90N08
thanksLeave a comment:
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Re: Cross reference for B90N08
DO I jump ADJ to ENA while ENA is connected to 5V pin thru 1K resistor.Leave a comment:
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Re: Cross reference for B90N08
Can I remove power board take it with me to work and solder 1k resistor between 5v pin and ENA then measure other pins that were 0 on the power board.Leave a comment:
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Re: Cross reference for B90N08
C2A cap is 100V 47uF. C110 is 50V 680uF.
The bundle of wires from power supply board that is disconnected on the end connects to the panel.Last edited by ned1; 09-01-2016, 11:04 AM.Leave a comment:
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Re: Cross reference for B90N08
Hope this helps...Leave a comment:
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Re: Cross reference for B90N08
Main board connection...Leave a comment:
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Re: Cross reference for B90N08
I am looking for 1k resistor then will do test. Few more closer pictures....Leave a comment:
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Re: Cross reference for B90N08
Is the picture I sent earlier the one you are looking forLeave a comment:
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Re: Cross reference for B90N08
Here is the picture of how the boards and panel are connected...Leave a comment:
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Re: Cross reference for B90N08
Correction, the ADJ pin is 2.9V ENA pin is always 0.Leave a comment:
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Re: Cross reference for B90N08
I will measure to enable voltage at the moment when I power it on, it may get 5V then goes to standby.Leave a comment:
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Re: Cross reference for B90N08
When I plug the power cord on it tries to light the LEDs , you can see a blink and it stays dark after itLeave a comment:
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Re: Cross reference for B90N08
Here is the voltage measurements:
corner connector is same as before
5V 5V
5V 5V
G 0
G 0
ENA 0
ADJ 0
Connector that I missed previously to give readings is
PIN1 0
PIN2 0
PIN3 25V
PIN4 25V
PIN5 0
PIN6 0Leave a comment:
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