WD8BXS
alter Hase
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RED Digits
« on: 03. August 2022, 15:54:53 »
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Got a repair in, and I keep getting intermittent red digits.
Ver 6 latest firmware .
Any advice an where to start?
I have already gone over all the IQ solder joints.
TNX DE Chuck
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:RED Digits
« Reply #2 on: 04. August 2022, 12:46:54 »
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Hello Andreas,
I am so sorry, I DID mean the I2C connections...
I have soldered at oscillator and through the complete chain. to the MCU
Today I will attempt to see where the chain is broken when the digits go red.
TNX Chuck
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:RED Digits
« Reply #4 on: 05. August 2022, 23:38:05 »
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Hooked up a known good UI Board, still red digits!
Replaced the oscillator, still red digits!
Not much left to check!!!
Seems like I always get the tough ones, hihi
de Chuck
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:RED Digits
« Reply #6 on: 06. August 2022, 14:15:18 »
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Yes Andreas,
That is all good.
This is an intermittent issue, when it is working it will work for hours.
Seems to happen when you go to change bands.
de Chuck
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:RED Digits
« Reply #8 on: 06. August 2022, 21:10:58 »
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Thanks Andreas,
Yes I have tried that as well.
de Chuck
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De WD8BXS vy 73
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DB2OJ
schon länger dabei
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Ich liebe dieses Forum!
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Re:RED Digits
« Reply #9 on: 07. August 2022, 07:08:20 »
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Hello,
I've had the same problem twice.
Both times I resoldered the solder joints of the SI751
and it worked perfectly again.
73 Manfed
DB2OJ
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WD8BXS
alter Hase
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Re:RED Digits
« Reply #10 on: 07. August 2022, 22:05:50 »
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Hello Manfed,
Yes, I re-soldered it twice and also replaced it with a different one.
Got me scratching my head here, hihihi
De Chuck
WD8BXS
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WD8BXS
alter Hase
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Re:RED Digits
« Reply #12 on: 08. August 2022, 23:40:11 »
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Yes, I changed the temp sensor as well
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:RED Digits
« Reply #13 on: 09. August 2022, 22:32:41 »
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Well, I think this is progress!!!
When I remove R18, the red digits go away!!
I tried replacing U11, but no luck.
Just if R18 is out...
de Chuck
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:RED Digits
« Reply #14 on: 10. August 2022, 17:41:16 »
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The Plot thickens....
If I remove R22 and R23 the issue goes away.
If I remove R51 and R52, then replace R22 and R23 the issue returns!
What do you think about that??
de Chuck
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De WD8BXS vy 73
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