[TechAssist] Re: Mitsubishi projection model VS-5006R- goes to shutdown
- From: peggs <peggs@xxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx, <techassist@xxxxxxxxxxxxx>
- Date: Mon, 09 Sep 2002 13:52:23 -0500
I let the customer make the decision on wether to replace
all the 'blackened' caps.
I give an estimate on their 'complaint',and also an
estimate on replacing ALL the caps
Peggs
At 02:11 PM 9/9/02 -0400, Leonard G. Caillouet wrote:
>
>The VS5006R is a V11B chassis. The problems with leaky capacitors in these
>units is well-known and I am surprised that so many of you are still
>repairing these without a complete capacitor rebuild. The Nichicon polar
>electrolytic caps on all 5 major circuit boards leak electrolyte and/or go
>high ESR and cause many unusual, hard to trace problems. If you don't plan
>to check them all and replace between 60 & 120 caps, you might as well not
>bother. The repair will follow you like a wounded dog...
>
>If you want a lasting fix on these sets you have to check all of these caps
>by
>1. Look for spots on the component side of the board and black on the
>negative leg.
>2. Look for black corrosion on traces or powdery solder joints.
>3. Heat the solder joint at the negative leg and smell for "fishy" smell.
>4. ESR & leakage test all Nichicon polar caps.
>5. Wash the electrolyte from the boards completely and scrape the black
>gunnk down to the copper and tin the traces.
>
>We never fix one of these without a complete rebuild any more. Same for the
>35" sets like the CK3526. Check the tubes and if the tubes test good give
>the customer an estimate of $400-500. We typically charge $240 for labor,
>$150 for parts, and $50 each for service calls to pick up and reinstall the
>boards.
>
>Some areas may not see as much of the electrolyte leakage as we see here in
>the South, but if you look and test the caps you will find dozens of bad
>ones on nearly all of these sets.
>
>Leonard G. Caillouet
>Service Manager
>Electronics World
>Gainesville, FL
>352-332-5608
>352-332-5668 (fax)
>
>----- Original Message -----
>From: <Ttkirkpat@xxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Sunday, September 08, 2002 10:20 PM
>Subject: [TechAssist] Mitsubishi projection model VS-5006R- goes to shutdown
>
>
>>
>> Set was dead- repaired power supply- all power voltages now perfect.
>> Horizontal output was shorted- replaced and did cm kit repair. Set still
>goes
>> into shutdown. On general principal I changed the vertical ic- still shuts
>> down. I removed one leg of d4a1 to disable the shutdown circuit. The set
>now
>> turns on- hi-voltage is perfect, power sources to the vertical ic are
>right
>> on at 10.5v and 27v.. The only thing I noticed was that the 1200v from
>d504
>> through r511 is missing- could this cause shutdown? And yes I replaced
>d504
>> and it made no difference. Suggestions please and thank you from Mike at
>the
>> Video Center. My e-mail is ttkirkpat@xxxxxxx
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Peggs' Electronics
1519 West 2nd Street
Owensboro,KY 42301
270-926-4968
fax 270-686-7399
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