Star Trek SOS repair - not my idea of a good time

Time for a thread revisit. I'm going to take a few temp readings on the heat sink assy and post them here.

1. Factory transistor position, fan wired to 120VAC
2. Factory transistor position, fan wired to the monitors 90VAC
3. Transistors inside the heat sink, fan wired to 120VAC
4. Transistors inside the heat sink, fan wired to the monitors 90VAC
5. Transistors inside the heat sink, fan wired to 120VAC, external fan blowing onto heat sink assy
6. Factory transistor position, fan wired to 120VAC, external fan blowing onto heat sink assy

I also have a fan I added to the back door right in front of the heat sink. For the above tests that fan will be off and covered.

I really dont thin that moving the transistors has any positive effect on temperature but we will know for sure here shortly. I figure given the min 80's temp of my shop it would only take about 15 minutes for the heat sink assy to gt to maximum operating temp.

Demogo - To answer your question about the shield, torpedoes and warp do bounce when I fire the phasers. I bet the b+ does too... Might be worth a looksee.
 
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Three readings done so far. Not as much of a change as I was expecting between 1 and 2. 20 minutes or so of up time before tests taken.

1. 109.9
2. 113.4
6. 95.7
 
Three readings done so far. Not as much of a change as I was expecting between 1 and 2. 20 minutes or so of up time before tests taken.

1. 109.9
2. 113.4
6. 95.7

Thank you for doing this and confirming the bounce effect from firing phasers. I was guessing that was normal behavior from a dramatic change on the screen so I wasn't too worried about it.

The comparison I'm really curious about is between 2 and 4.
 
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Thank you for doing this and confirming the bounce effect from firing phasers. I was guessing that was normal behavior from a dramatic change on the screen so I wasn't too worried about it.

The comparison I'm really curious about is between 2 and 4.

The plan is to get to the rest of the measurements next week. I had to get started on a DDR that I've been putting off for a while. :(
 
Welp, here we go...

3. Transistors INSIDE fan wired to 120VAC - 107.7
4. Transistors INSIDE fan wire to monitor chassis 90VAC - 111.5
5. Transistors INSIDE fan wired to 120VAC + External fan - 102.1

There you have it.

Game was left to run for about 30 minutes each time for this test.
 
So can we say their's not really enough difference to matter either way but the best is #6 Factory transistor position, fan wired to 120VAC, external fan blowing onto heat sink assy - 95.7 for the win :)
 
And of course I'm not done with this effin game.

After its been on for a while the speech gets messed up and eventually dies altogether. :(
 
So can we say their's not really enough difference to matter either way but the best is #6 Factory transistor position, fan wired to 120VAC, external fan blowing onto heat sink assy - 95.7 for the win :)

I think we can say that. But, in the grand scheme of things these transistors dont care about 20 degrees like we would/do. I'm sure these parts can get A LOT hotter and still work right.

However, I will be putting them back to their factory position tomorrow.
 
Was the ambient temperature about the same?

2 degrees of difference inside vs outside the heat sink in the factory position/voltage is really at the noise level...
 
Was the ambient temperature about the same?

2 degrees of difference inside vs outside the heat sink in the factory position/voltage is really at the noise level...

Yeah, ambient is about the same. Hot. :(
 
getting back into this. Now I'm testing the boards that were sent to me to make sure they are:

a) Still working
b) whats marked as not working I'll fix

First one up is a USB thats noted to be making "strange sounds."

I thought I had this one fixed a while back but while testing the boards this after noon all three "intro" sound effects are wrong. Since all three of them use all three sound blocks I lifted R8 thru R10 to see if I could hear one of them not making noise or making strange noise. Turns out that SB2 is not producing intro noise at all. But, as far as the sound test goes, every other instance where SB2 is used its working. Hmm...
 
You gotta love the simple fixes but sometimes they can still beat you up until you find them.:)

For sure.

BTW, all of your boards are on their way back. All of them work now (including the ones that didnt).
 
Thank's Matt, I know you're glad your G-80 adventure is over for now. :)

I cant even put into words to tell you how happy I am that its over.

But, I'm looking forward to that other repair thread getting updated.
 
Had a question about where I mounted the external fan. Here are a few pictures.
 

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