# What are these SMD components with 3 leads?

I am trying to repair a vacuum fluorescent display module by Futaba model code is M402SD07GS. It is seen that there is no energy on the display and Vcc and GND legs are short-circuited at "C1162" grid/anode driver.

When I look at the circuit to understand where the short circuit is, I am encountered these 3-lead components with very short codes on them.

Since I do not know what these components are, I cannot continue to understand where the short circuit is. I can not order because I do not know the product codes

When I look closely, the following is written on the components.

L G for Q1
332 for ZD1
D3  for D2
D3  for D3
113 for ZD2


Is there a way to figure out what this 3-legged component is?

• Q is probably for a BJT (M would be for a MOSFET normally), ZD is zener diode and D is a regular diode. Apr 19 '20 at 15:13
• I can't tell you what the exact part numbers are for all of these, but it might help your search to know that that form factor is called a SOT-23 package. Apr 19 '20 at 15:26
• Having watched a few of Loius Rossman's YouTube videos, I suggest that you check the capacitors for short circuits first. They will be easier to find replacements for. Apr 19 '20 at 16:05
• @AndrewMorton can you suggest me a video? Apr 19 '20 at 18:26
• @mehmet My memory is not good enough to remember which components were faulty in which videos. My idea was that if the faulty component is a capacitor, then you will not need to try to find out what the hard-to-identify components are. Apr 19 '20 at 19:05