diode upgrade question the guru

[Big Lou]

I have my box apart ,i had an itermittent.. miss..for i am also doing preventative misery..[PM] I HAVE 3 DIODES THAT SHOW A BLACK DOT ,none show the white foam i have seen here

1, what is the white plastic for under the board, it was glued to box and board, when i seperated it i have blue spots on plastic where it was glued to 3 different capacitors.. dont see damage to capacitors..???

 

2. i had white plug ends on wires and the clips are broken off yet on the box there is no spot for clips to lock,course box is black

 

i had glue on board bottom where all solder joints are ,,rise on on of the nuts that go to ???heat sink?? 3 sided boxes that have a nut on them ..glue is discolored in that area //maybe heat or just old/////

 

on the plug in itself and in the hole is what appears to be vaseline ..

 

ALLMOST FORGOT WHAT IS THE PLASTIC FOR??????

 

at 3,000 rpm i have a cylinder cutting in and out . RIGHTY NOW AFTER GETTING THOSE AGGRIVATING SCREWS OUT ,,SURE WERE IN A BAD SPOT

I am taking rest of day for headache repair

 

numbers on box are TID14-34 41R-11 IT IS A HITACHI

 

IF ANY OF THAT MEANS ANYTHING

 

 

SO DO I PEEL ALL THE GLUE OFF AND REGLUE ,,, i cant find my heatsink tool so i am hoping a alligator clip will do..

IS THERE ANY OTHER THINGS I CAN DO WHILE I AM HERE ,,,, /////??????///:detective::detective::detective::detective:PIC ARE ON?? MY DUMB PHONE?? I WILL TRY TO POST THEM

Edited June 11, 2013 by Big Lou

[dingy]

I have my box apart ,i had an itermittent.. miss..for i am also doing preventative misery..[PM] I HAVE 3 DIODES THAT SHOW A BLACK DOT ,none show the white foam i have seen here

 

There should be 8 barrel diodes, all I have seen in person and in pictures have been grey & blue.

 

1, what is the white plastic for under the board, it was glued to box and board, when i seperated it i have blue spots on plastic where it was glued to 3 different capacitors.. dont see damage to capacitors..???

 

The plastic sheet is between vent holes and solder side of board, it may have been some high tech stuff in the 80's to help wick away moisture from board. I didn't put it back in couple of TCI's I repaired, worked fine.

 

2. i had white plug ends on wires and the clips are broken off yet on the box there is no spot for clips to lock,course box is black

Normal

 

i had glue on board bottom where all solder joints are ,,rise on on of the nuts that go to ???heat sink?? 3 sided boxes that have a nut on them ..glue is discolored in that area //maybe heat or just old/////

 

That is an SCR in the heat sink in 4 places, sort of like a transistor, but capable of higher power switching. These are trigger for coil circuits I think. They will get warm due to current they are switching, which will cause darkening of conformal coating.

The glue like stuff is a conformal coating, used in electronics that will be subject to high humidity. It seals board.

 

on the plug in itself and in the hole is what appears to be vaseline ..

 

Vaseline like stuff is probably dialectric grease, normal to use on electric connectors.

 

at 3,000 rpm i have a cylinder cutting in and out . RIGHTY NOW AFTER GETTING THOSE AGGRIVATING SCREWS OUT ,,SURE WERE IN A BAD SPOT

Remount TCI on top front of air box, you will need to cut one of the mount ears off to get it far enough forward to allow cover to seat back on. Use velcro to mount.

 

I am taking rest of day for headache repair

 

numbers on box are TID14-34 41R-11 IT IS A HITACHI

 

IF ANY OF THAT MEANS ANYTHING

 

 

SO DO I PEEL ALL THE GLUE OFF AND REGLUE ,,, i cant find my heatsink tool so i am hoping a alligator clip will do..

I wouldn't peel off conformal coating, other than in areas where you are soldering. You can mount diodes so they stand off board a ways, 1/4" at least is fine. Use low wattage soldering iron 20-40 watts. To much heat will cause the traces to separate from the board. Use an electronic rated flux. ( See picture for diode stand off. Fugly, but fully functional). Factory type soldering is done after all components placed on board, then board is ran over a molten pool of solder to do all components within a second or two. This is why all components are on one side only of board. 2nd picture is of 1st board I did and damaged traces. I had to jumper to another component on same trace to get circuit closed. It did work fine though.

 

IS THERE ANY OTHER THINGS I CAN DO WHILE I AM HERE ,,,, /////??????///:detective::detective::detective::detective:PIC ARE ON?? MY DUMB PHONE?? I WILL TRY TO POST THEM

 

 

 

My comments highlighted in original text above.

 

Gary

[Big Lou]

I did it,,, tested this evening SURE WAS FUN,,CHANGED MY CARB SYNCH.. WAY STRONGER NOW,,TAKING IT ACROSS STATE LINES IN THE MORN..LOTTERY TICS,,

 

STARTS LOT EASIER

 

GROUND QUESTION ?????

ON THE MOTOR WHEN I PULLED IT WAS ONLY CABLE FROM BATTERY TO BLOCK..

 

ON THE COILS WAS 2 MORE GROUNDS ,MOUNT SCREWS, I MUST OF MISSED BEFORE WHEN I HAD IT APART

 

IS THERE SUPPOSE TO BE A GROUND FROM MOTOR TO FRAME SOMEWHERE LIKE A CAR???

 

ONCE HAD A CHEVY WOULDNT RUN BECAUSE OF A FRAME TO BODY GROUND????

 

WGERE IS IT SUPPOSE TO BE IF THERE IS ONE???

Edited June 17, 2013 by Big Lou

[pmelah]

I did it,,, tested this evening SURE WAS FUN,,CHANGED MY CARB SYNCH.. WAY STRONGER NOW,,TAKING IT ACROSS STATE LINES IN THE MORN..LOTTERY TICS,,

STARTS LOT EASIER

GROUND QUESTION ?????

ON THE MOTOR WHEN I PULLED IT WAS ONLY CABLE FROM BATTERY TO BLOCK..

ON THE COILS WAS 2 MORE GROUNDS ,MOUNT SCREWS, I MUST OF MISSED BEFORE WHEN I HAD IT APART

IS THERE SUPPOSE TO BE A GROUND FROM MOTOR TO FRAME SOMEWHERE LIKE A CAR???

ONCE HAD A CHEVY WOULDNT RUN BECAUSE OF A FRAME TO BODY GROUND????

WGERE IS IT SUPPOSE TO BE IF THERE IS ONE???

 

i would not know but curious about that too

[Big Lou]

i did do this myself

i have been learning to down load pics so i missed a few

 

my smart fone , has a cracked screen an . i changed back to the rock phone .. i can drop it

 

if you look in pic 4 you see the blue capacitors in the middle ..

next to it is a red {doide } kind of clear . ..it shows heat

 

it runs good now ,yet do i need to change it also,, if so what kind is it ,, just a number under it on board ,, ther is one on each side of the capacitors ,, only two like it on the board,,

 

i am fixing to go ride it now and i have run 3 tanks through it since i did the diodes... there is a mud bog in heflin , today and a full moon tonight,,

 

time for some howling

Edited June 22, 2013 by Big Lou