[TechAssist] Re: RCA Chipper Checker, and the Three blind mice
- From: Gary McCartney <number63@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 22 Jul 2002 12:21:59 -0400
Really? That is an interesting concept. Not sure I'd want to use the
dish washer when I clean eating ware in there but I can see where it
would agitate and get into all the nooks. I would have thought the water
would damage the circuit even though letting it dry for a while.
Wouldn't it seap into the flyback windings where it would not have much
chance for the moister to escape?
I recently bought a used computer monitor at an auction. On the way
home, the rain started teaming down and this monitor was in the back of
my pickup truck. I dried it out when I got back to the shop. I used a
hair dryer for an hour, then let it sit for 4 days, then used the dryer
again. All this and there weren't much signs of water on the chassis to
begin with. Finally I plugged it in and it ran perfectly for 2 hours
then died. No horizontal drive. haven't got back to it. Maybe it was on
it's way out regardless if it got rained on or not.
Gary McCartney
McCartney Electronics
7134 Fife Rd, RR 7
Guelph Ontario Canada N1H 6J4
Fax: (519)821-1530
email: number63 (at) inetsonic.com
Ty Kraemer wrote:
>
> Gary,
> The following advice might sound as crazy as the concept of "mutual
> destruction deterrent" or "Military Intelligence". I have used this method
> for years, and it works.
> First, remove all possible power sources, such as standby batteries.
> In your case, discharge all large capacitors, this to insure against
> possible electrolyses.
> Take the whole board home with you and place it carefully in the
> dishwasher. Add the soap as you would with dishes. You might have to remove
> the top rack.
> The next step is critical! Let it sit in the warmest place you can find
> for two days. (This does not include the self cleaning oven.) If you have
> Relays or IF type cans, let it sit for a week. This will assure that all the
> moisture is out of the works. In the winter, I place the board in a Fruit
> Drier at 100 degrees.
> The only problem I have had with this method is when there is a large
> buildup of oxide underneath an LSI and the spray can not get to it.
> Good luck and happy troubleshooting.
> Ty
> Tiberius (Ty) Kraemer
> Blue Star Electronics
> 3312 Silverton Rd.NE
> Salem, OR 97303-2753
> Phone: 503 391 1491
> E-Mail: ty1k@xxxxxxxxx
>
> ----- Original Message -----
> From: "Gary McCartney" <number63@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Saturday, July 20, 2002 3:34 PM
> Subject: [TechAssist] RCA Chipper Checker, first time user, help please
>
> I have my new Chipper Checker connected to a CTC178L projection set. The
> set is dead because some mouses pee'd on the chassis (I mentioned this
> set a few months ago in case anyone remembers, but I only work on it
> when I'm caught up with customers items- it belongs to my buddy who is
> very patient).
>
> I installed the new eeprom and microprocessor kit before I got the
> Chipper Checker.
> Now with the Chipper Checker connected, I get error code 136, TVB (tone/
> volume/ balance) which means U1503 is not communicating with the
> micrprocessor. Does this mean that U1503 or associated circuit is bad?
> I do have U1600 removed from the circuit (stereo decoder IC) so why
> doesn't Chipper Checker come up with error code 128 (no communication
> from U1600) ?
> How accurate is this Chipper Checker at determining faults?
>
> The basic problem with the set is that when remote power button is
> pressed, I get 3 chirps, then nothing. During these chirps, I get 120 V
> pulses B+ on the main 135V line, and I get a nice looking horizontal
> output waveform on the HOT collector. I have the flyback lead to the HV
> splitter disconnected. I removed U1600 because of corrosion on the pins.
> Replaced micro and eeprom because pins were corroded and thought that
> could be the problem with set not starting. I also have CRT boards
> unplugged from the tubes.
>
> Thanks for any help.
> --
>
> Gary McCartney
>
> McCartney Electronics
> 7134 Fife Rd, RR 7
> Guelph Ontario Canada N1H 6J4
> Fax: (519)821-1530
> email: number63 (at) inetsonic.com
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