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Hi D,Could someone tell me what this component is please.
The small surface mount component pictured with GF marking.
Thanks
No luck, the part I am referring to is the very small black component with GF marked in white letters.
Hi D,No luck, the part I am referring to is the very small black component with GF marked in white letters.
I have a problem with a circuit, I am not getting supply voltage to the receiver circuits.Hi D,
Missed!
I think it may be an SMD GF Capacitor, youmay be able search images for that marking?
C
Thank you for the information.Component marked GF is a fuse.
Hi A,Component marked GF is a fuse.
I found some information on some fuse codes vs ratings & the G = 0.75A, F meaning Fuse on the site I looked at?Hi A,
Is there a way to tell what value it is?
If it's a fuse, then that may solve the OP's issue.
C
I found some information on some fuse codes vs ratings & the G = 0.75A, F meaning Fuse on the site I looked at?
I have continuity across the component.
Hi N,That would appear to be OK then, however your 'test' of the voltage regulator above is meaningless - you can't test a voltage regulator on ohms - you need to measure the voltages going in and coming out. Ohms ranges are fairly rarely used in fault finding, other than for testing fuses, or perhaps rectifiers or power transistors.
Thanks Nigel, I understand now about the voltage regular tests, it was just the input on the regulator has a dead short to ground when connected in the board. I assumed that it maybe could have a short so I removed the input leg from the board & then tested it again. There appears to be a short to ground somewhere as described in the schematic I posted hence 0v to the input of the regulator & no voltage out to the receiver supply connection.That would appear to be OK then, however your 'test' of the voltage regulator above is meaningless - you can't test a voltage regulator on ohms - you need to measure the voltages going in and coming out. Ohms ranges are fairly rarely used in fault finding, other than for testing fuses, or perhaps rectifiers or power transistors.
I have found the short in the D5 Zener Diode.
It is a C20PH 0.5w
What would be the lowest Voltage Zener that I can use our local stores only stock 1W Zeners as well is this ok.
I Have some 1N4749 1 Watt Zeners but the rating is a little higher.
My lower voltage Zeners are 0.5W