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Unknown electronic symbol

carloncho

Sep 2, 2018
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Sep 2, 2018
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Hallo comunity,
in a circuit diagram of a SMPS there are symbols D1 -D8 (see annex) which I dont know. Can anyone tell me what is the meaning and purpose of them.
Thanks in advance for any answer.

Carloncho
 

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davenn

Moderator
Sep 5, 2009
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in a circuit diagram of a SMPS there are symbols D1 -D8 (see annex) which I dont know.


I assume you don't really mean D1 - D8 as different types of diodes are referred to

I suspect you really mean D1,D2,D5,D6,D7,D8,D19 and an unmarked one in the top right … prob. D9

They are a twin diode pack

upload_2018-9-3_20-28-51.png

where the cathode of one diode is commoned with the anode of the other diode

I would have to search for a specific part number
are you sure it isn't already listed somewhere on the circuit sheet ?
 

Externet

Aug 24, 2009
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Aug 24, 2009
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850
Can be the lower right connected as counterparalleled, A1 to K1.
iu

When 'circled' can mean LEDs :
upload_2018-9-3_8-12-14.png
 

73's de Edd

Aug 21, 2015
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Sir carloncho . . . . . .

Are you just grasping for straws in zeroing in on those parts, as being at fault?

The schematic shows the 8 sets to be current and voltage sampling for the 4 (or more) CCFL backlight lamps and feeding back correction to the OZ960 CCFL controller .

Give your specific SAMSUNG model number and more info can be forthcoming.

With the board connected back into the unit and then plugged in and powered up . . .is 13VDC power present at the R15-R13 junction feeding pins # 3-4 of the OZ and pin 3 of each of the 4539 power driver FET's ?

PARTS DATA . . . . . BAV99L

upload_2018-9-4_11-40-47.png


73's de Edd
.....
 
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