New Member Needs Help With Xlt

[Mickey Mouse]

Hello everyone, this is Mickey Mouse I'm new, but hope to find information on a White Spectrum XLT. Is anyone worked on main board or display? I tried to replace all caps and now Cap # 31 on board 505- 0198-B exploder's every time I put one in. I'm using 12 Volt battery pack. Can anyone help me.  have checked polarity and they are in the correct way. C31 is a 220uf, 16volt cap.

[Mickey Mouse]

Also, I replaced caps in display board and display would come on with blank screen for a few seconds then turn off.

[Mickey Mouse]

I was re-checking the main board and found an IC chip U2, looks burned up. But cannot identify its numbers. I would appreciate if someone could identify, this chip number. (IC - U2) and post it to me. 

[phrunt]

Maybe @Geotech can help?  

[Geotech]

On 11/17/2023 at 12:19 PM, Mickey Mouse said:

I tried to replace all caps and now Cap # 31 on board 505- 0198-B exploder's every time I put one in.

Makes no sense. C31 is simply a cap directly across the battery. If it explodes then it's either backwards, (way) too low of a voltage rating, or the circuit is seriously screwed up.

On 11/17/2023 at 1:45 PM, Mickey Mouse said:

I was re-checking the main board and found an IC chip U2, looks burned up. But cannot identify its numbers. I would appreciate if someone could identify, this chip number. (IC - U2) and post it to me. 

U2 is a "4316" quad switch. Possibly a CD4316, but 74HC4316 and 74HCT4316 might also work. If this part is cooked, then you've got some super major problems.

[Cascade Steven]

Geotech:

Although I do not have an XLT, I just wanted to say thank you for your input and sharing your knowledge on these instruments.  I am certain that there will be others in the future that will appreciate access to these little tidbits of info and insight.  I appreciate your contribution.  Thank you.