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Have you checked the opposite door for an identical board?
One diode shows 1N and another shows 400 so they all might all be the same common 1N400x rectifier diode.
You have to desolder component before checking with multi meter, some time component do not show their property when they are in circuit.
Open Diode
If a zener diode reads high resistance in both directions, this is a sign that the diode is open.
Shorted Diode
If the zener diode reads low resistances in both directions, this is a sign that the diode is shorted.
It's the 1st time I have seen silkscreen REFDES for a unique part number rather than a unique location. easier for hand stuffing...
It's the 1st time I have seen silkscreen REFDES for a unique part number rather than a unique location. easier for hand stuffing...
REFDES means Reference Designators meaning R1`, R2 etc
There are two R4's both 33K
There are two D1's , same diode
Now, I can tell the transistors are different because they are labeled Q1, Q2
YOu may have to trace schematic and parts shown on board.
You have to wait for the bc338? I wonder what would happen if you have asked for a rare component...:thinker:...The shop guy told me he could have some BC 338 for me in a couple of days...
Be very careful when you place the BC in place of the 2SC. The legs are not in the same ordering. You will have to bend legs or rotate transistor accordingly.
The images in the link are just examples and not the actual solution. See the order of pins in the two datasheets and act as required:
**broken link removed**
You have to wait for the bc338? I wonder what would happen if you have asked for a rare component...:thinker:
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