ANAN 8000DLE Fan failure & Low sensitivity

vu2mb
Posts: 23
Joined: Thu Nov 21, 2019 5:30 pm

ANAN 8000DLE Fan failure & Low sensitivity

Postby vu2mb » Sun Feb 23, 2020 7:45 pm

Hello,

Yesterday night I was operating FT8 and I probably heard some noise in the radio and then it was completely calm and realized fan stopped working and as temperature was rising above 40 and I switched off the radio and after 30 minutes when I switched on and connected with thetis, Seen that noise floor was much below and S meter reading was around S2/s3 usually its around S8/9 on 20 and above S9+10 or so on 40/80.

Frustrated, I switched off and went to sleep. Today morning radio was behaving normally and noise floor was up and fan wasn't working. when temperature reached around 45 I switched off and after some time i was at the operating table to find radio deaf again. This time when temperature was around 42 noise floor dropped and S meter was again S3.

Why fan Failed and why sensitivity is failing? Is it some relay issue? What to look for? What are the safe temperature levels to operate? I believe around 60.
Please help?

73
Bhanu
VU2MB
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w-u-2-o
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Re: ANAN 8000DLE Fan failure & Low sensitivity

Postby w-u-2-o » Sun Feb 23, 2020 8:37 pm

If those temperatures are in Celsius the radio is probably getting too hot and one of the internal PTC devices (temperature sensitive, self-resetting fuses) is opening.

Either the fan is broken, the fan wiring or connector, or the fan driver IC.
vu2mb
Posts: 23
Joined: Thu Nov 21, 2019 5:30 pm

Re: ANAN 8000DLE Fan failure & Low sensitivity

Postby vu2mb » Mon Feb 24, 2020 7:32 am

Thanks Scot,

Will open the case, check and update you.

73

Bhanu
VU2MB
vu2mb
Posts: 23
Joined: Thu Nov 21, 2019 5:30 pm

Re: ANAN 8000DLE Fan failure & Low sensitivity

Postby vu2mb » Mon Feb 24, 2020 8:52 am

Dear Scot WU2O

Found that this fan muffler was sucked in to the fan blades. Removed it now and Thank God fan still working.

Thank you.
73

Bhanu
VU2MB
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