That FET is used to clamp the input of the optocouplers and the 6500 doesn't use optocouplers to drive the outputs. This looks like the 7801 board (there is a 7801 page in the tutorial if you didn't find it already).
That's a JFET. Are you sure you're checking it correctly. If not, go to item 6 on the Checking Semiconductors page (CS in the Quick Links menu).
That's a JFET. Are you sure you're checking it correctly. If not, go to item 6 on the Checking Semiconductors page (CS in the Quick Links menu).
Same Amplifier 4100D
I found a bad transistor/diode? the marking on the pcb is D400 and the marking on the transistor/diode is I5H T.
I wanted to look up the residence so I can test it but can't find it anywhere.
1. I looked under "Diodes" in your book but it didn't list this type. (if it is a type diode)
2. How would i test it? I said it's bad because it's open on all 3 points.
Thanks
I found a bad transistor/diode? the marking on the pcb is D400 and the marking on the transistor/diode is I5H T.
I wanted to look up the residence so I can test it but can't find it anywhere.
1. I looked under "Diodes" in your book but it didn't list this type. (if it is a type diode)
2. How would i test it? I said it's bad because it's open on all 3 points.
Thanks
On the 7801 page, perform a ctrl-f search for:
The other 3120 (the one on the left in t
The mark is actually: 5H
They used different diodes but what's important is that you have a diode connecting the base and emitter of the top A42 in the diagram.
The datasheets are under:
MMBD4148.-datasheet.pdf
Diode marked 5H - MMBD701.pdf
The other 3120 (the one on the left in t
The mark is actually: 5H
They used different diodes but what's important is that you have a diode connecting the base and emitter of the top A42 in the diagram.
The datasheets are under:
MMBD4148.-datasheet.pdf
Diode marked 5H - MMBD701.pdf