Derek92994's 700 Ser II White Oak conversion

[laatsch55]

Check Pico's with power off in ohms mode..

 

[derek92994]

Check Pico's with power off in ohms mode..

In the videos I measured with power off and on.

 

[derek92994]

Sorry guys, I measured the Picos wrong, thanks Lee for informing me of the correct procedure

** The Top Pico on the right hand side backplane measures high, I had to turn my multimeter up to 200k range to get a reading. The others I was able to measure on the lowest range.

 

[laatsch55]

You have a blown pico..

 

[mlucitt]

You have a blown pico..

Or, a 160 Megohm resistor...

 

[laatsch55]

Your basic Aussie conversion of a perfectly fine pico..

 

[derek92994]

Just for Shits and Giggles

 

[derek92994]

What's the next step Lee?

 

[laatsch55]

Soldering a new one amp pico over the old one. If you dont have a solder sucker DO NOT desolder and pull the old one. Just lay the new one next to the old one and solder in,. Joe may have a trick of using a very small (1/8 watt) 1 ohm resistor to finish trouble shooting if you cant find a pico in Oz.

 

[Paulfg]

Soldering a new one amp pico over the old one. If you dont have a solder sucker DO NOT desolder and pull the old one. Just lay the new one next to the old one and solder in,. Joe may have a trick of using a very small (1/8 watt) 1 ohm resistor to finish trouble shooting if you cant find a pico in Oz.

Pico fuses are available from WES Australia ,02 9797 9866 .A web search will give online services/catalogue. The one amp picofuse is listed as part number PF1

 

[Gepetto]

Soldering a new one amp pico over the old one. If you dont have a solder sucker DO NOT desolder and pull the old one. Just lay the new one next to the old one and solder in,. Joe may have a trick of using a very small (1/8 watt) 1 ohm resistor to finish trouble shooting if you cant find a pico in Oz.

What does Darcy have on hand would be a good start? The value is not super critical.

 

[derek92994]

What does Darcy have on hand would be a good start? The value is not super critical.

Got one of these but I can go to Jaycar Electronics tomorrow and get other stuff, maybe not a pico though. Need to replace a couple of tiles on the roof of the house. tomorrow morning.

 

[Gepetto]

51 ohms, 5% should do OK to check things out further.

 

[derek92994]

51 ohms, 5% should do OK to check things out further.

Ok, I do have a solder sucker, do you want me to remove the blown pico and solder that resistor I have in its place?

 

[Gepetto]

Ok, I do have a solder sucker, do you want me to remove the blown pico and solder that resistor I have in its place?

Just tack it on top of the existing Pico as Lee suggested Darcy. Till you complete your debug. This is just temporary until you can get a fuse replacement and to continue to see if anything else is wrong or not.

 

[derek92994]

Just tack it on top of the existing Pico as Lee suggested Darcy. Till you complete your debug. This is just temporary until you can get a fuse replacement and to continue to see if anything else is wrong or not.

Ok I'm onto it.

 

[derek92994]

Ok Done That

 

[derek92994]

Going to test VR1 and VR2 again

 

[derek92994]

VR1
C: 0.1v
A: 0v
R: 0.1v

VR2
C: 0
A: -20.4
R: -18.2

 

[derek92994]

I still have that zener diode D80 lifted, should I put it back on? Forgot about that