Need help to repair two phase 400 amps

laatsch55

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#61
Go to bed, no reason to start that conversation this late, I'm goin to bed too....Nite!
 

kevin

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#64
That's so funny !!! I knew when I said Goodern ... I was asking for it !!!! Hello Lee !!!!!
 

LarryD

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#65
Hello, going to renumber them one thru sixteen and test them in the diode mode. Please disregard previous readings. Be back after dinner and renumbering . Thanks
 

LarryD

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#66
NOTE 1 THRU 8 ARE RIGHT CHANNEL ON #2 I SAW A 087 AND ON #8 A 502 ON THE DRIVE. .

RED C / BLACK B
1 - 16 OPEN
RED C / BLACK E
1 - 16 OPEN
RED E / BLACK B
1 061
2 087 #####
3 056
4 OPEN D
5 058
6 061
7 059
8 OPEN D
9 059
10 067
11 061
12 OPEN D
13 052
14 058
15 052
16 OPEN D
BLACK C / RED B
1 531
2 520
3 532
4 527 D
5 532
6 534
7 538
8 564 D
9 539
10 525
11 540
12 529 D
13 536
14 526
15 543
16 539 D
BLACK C / RED E
1 567
2 563
3 568
4 OPEN D
5 567
6 569
7 568
8 OPEN D
9 568
10 565
11 569
12 OPEN D
13 566
14 561
15 568
16 OPEN D
BALCK E / RED B
1 061
2 087#####
3 056
4 576 D
5 058
6 061
7 059
8 502 D#####
9 056
10 067
11 061
12 576 D
13 052
14 058
15 051
16 586 D

 
 
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LarryD

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#72
1 060 2 088 3 056 4 572 5 058 6 061 7 059 8 596 9 056 10 067 11 061 12 576 13 052 14 058 15 051 16 586


That's odd # 8 changed? I had to be me and fat fingers.
 
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laatsch55

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#78
That's why the readings are not making sense. The 910's are a Darlington transistor that have internal resistors. They will not measure like other Bi-Polar junction transistors.


OK, now red on base, black on collector, 1 thru 16. Your meter may not have enough current to turn on a Darlington but we can surmise a few things. Let's finish the tests.....I have enough outputs to replace all those 910's so don't worry about it....
 

LarryD

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#79
That's why the readings are not making sense. The 910's are a Darlington transistor that have internal resistors. They will not measure like other Bi-Polar junction transistors.


OK, now red on base, black on collector, 1 thru 16. Your meter may not have enough current to turn on a Darlington but we can surmise a few things. Let's finish the tests.....I have enough outputs to replace all those 910's so don't worry about it....
Ok hold on.
 
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