[Premium-Rx] WJ8888 quad 8 fault

[Kurt Keller]

I can tell you for certain the 8888 I had needed a battery to work. It 
started to act up when the voltage dropped to
3 volts as I recall and I think the battery was a 3.5 volt. Sometimes it 
would work and other times it did not. Once
I changed the battery no problem.


On 12/17/12 1:16 AM, Dov Vardy wrote:
> To my best knowledge the 8888 can work without the back-up battery. I 
> have used several ofthese radios without the backup battery and they 
> worked well except he memory operations.
>
> Dov
>
> ----- Original Message ----- From: "joe jesson" <jjesson at voyager.net>
> To: "Kurt Keller" <kkeller1 at comcast.net>; 
> <premium-rx-bounces at mailman.qth.net>; <premium-rx at mailman.qth.net>
> Sent: Sunday, December 16, 2012 9:34 PM
> Subject: Re: [Premium-Rx] WJ8888 quad 8 fault
>
>
>>
>> Yes, the WJ back-up battery needs to be replaced and also the 
>> tantalum electrolytic bypass caps tend to short 0over time.  A bit 
>> tricky to find the shorted cap and I usually measure the current on 
>> isolated boards to find the shorted caps.
>>
>>  Joe Jesson
>>
>> Sent via BlackBerry from T-Mobile
>>
>> -----Original Message-----
>> From: Kurt Keller <kkeller1 at comcast.net>
>> Sender: premium-rx-bounces at mailman.qth.net
>> Date: Sun, 16 Dec 2012 13:34:45
>> To: <premium-rx at mailman.qth.net>
>> Subject: Re: [Premium-Rx] WJ8888 quad 8 fault
>>
>> These units will not work unless the back up battery is in them and at
>> full voltage or near. The battery is instrumental
>> in the unit booting itself up.
>>
>>
>>
>> On 12/16/12 1:08 PM, richardreich at aol.com wrote:
>>> Hello to all,
>>>
>>> I was wondering if there are any folks out there who are familiar 
>>> with the WJ8888.
>>>
>>> I have three of them (all different models) - but they have all 
>>> stopped working over the this year.
>>>
>>> The final one died last week, and I'm desperately trying to fix it 
>>> (despite failing eyesight) as its my favorite receiver (yes - even 
>>> over the WJ8711, and Ten Tec 340).
>>>
>>> The back-up battery was caught just in time - although deteriorated, 
>>> no corrosion anywhere else.
>>>
>>> The radio powers-up - but none of the buttons will switch anything 
>>> (lights do not change), and the tuning indicator is stuck showing 
>>> '0' (zero).
>>>
>>> Currently I'm going over the power supplies but having problems 
>>> reading the diagrams.
>>>
>>> So I have some questions...
>>>
>>> Firstly - do these receivers still work with the back-up battery 
>>> removed? (or have I caused the fault by removing it)
>>>
>>> Secondly - any pointers to where/what I should be looking at?
>>>
>>> Thirdly - is there anyone in the UK who is able repair these 
>>> wonderful radios?
>>>
>>>
>>> Thank you....  Richard
>>>
>>>
>>> ______________________________________________________________
>>> Premium-Rx mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/premium-rx
>>> Help Page: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Premium-Rx at mailman.qth.net
>>> Help Contact eMail:  paul at 8zo.com
>>> Home Page:  http://www.premium-rx.org/
>>>
>>
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>> Help Contact eMail:  paul at 8zo.com
>> Home Page:  http://www.premium-rx.org/
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>> Home Page:  http://www.premium-rx.org/ 
>
> ______________________________________________________________
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>