Gary McCartney
McCartney Electronics Guelph Ontario Canada Est. 1984 email: gary (at) number63.ca
Bil Green wrote:
Jay,
Someone finally replied with the correct value, and sure enough it is 680 Ohms. One more thing to remember when checking resistors. Red forth band means 2% tolerance (and the fifth band doesn't really matter in most cases, I guess).
Bil Green PC 1000
Mammoth Lakes, CA 93546
760-924-1000 Wednesday, November 3, 2004, 5:22:39 AM, you wrote:
JC> Bill, JC> Thank you for the heads up on the RCA 2% info. I've been in RF&Microwave JC> Calibration and repair for over 20 years, and this is a new one on me. Of JC> course, RCA doesn't do much test equipment. Hope the 2% does it for you.
JC> Jay Cashman
JC> Jay Cashman Services
JC> 3824 Ance Creek Rd
JC> Reeds Spring MO. 65737
JC> (417)272-9789
JC> Satellite, Home Entertainment and Computer
JC> Installation, Service and Repair
JC> ----- Original Message ----- JC> From: "Bil Green" <[EMAIL PROTECTED]>
JC> To: "ELECTRONICS PROFESSIONALS LIST" <[EMAIL PROTECTED]>
JC> Sent: Tuesday, 02 November, 2004 12:44
JC> Subject: Re[2]: [Techs] Need Resistor Value (5 color bands - readable)
Hi Jay,
Thanks for your advice. Someone suggested that it may be 680 Ohm (with the red indicating 2% - common with RCA flameproof) and I suppose you would disregard the white band.
Andrews Electronics has one in stock, so I ordered it and will check the resistance tomorrow when I get it. I hope it's very rare that those selected resistors are used.
Bil Green PC 1000 Mammoth Lakes, CA 93546 760-924-1000
Tuesday, November 2, 2004, 9:50:51 AM, you wrote:
JC> Bill, JC> This seems to be a "selected value" resistor, and starting with the
JC> band
JC> closest to one end of the resistor, you read the exact value of the JC> resistor, either 68129 ohms or 92186 ohms. It's a pain in the butt,
JC> but
JC> you're looking at measuring many of your stock resistors to find one
JC> with
JC> the exact value - and pray that your DMM is accurate to 1 ohm. This
JC> is
JC> probably a current setting resistor, so you could even put in a 10k
JC> pot as a
JC> rheostat and set the value that way, then "tweak" it untill the
JC> circuit
JC> works properly. JC> Good luck!
JC> Jay Cashman
JC> Jay Cashman Services
JC> 3824 Ance Creek Rd
JC> Reeds Spring MO. 65737
JC> (417)272-9789
JC> Satellite, Home Entertainment and Computer
JC> Installation, Service and Repair
JC> ----- Original Message ----- JC> From: "Bil Green" <[EMAIL PROTECTED]>
JC> To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
JC> Sent: Tuesday, 02 November, 2004 01:50
JC> Subject: [Techs] Need Resistor Value (5 color bands - readable)
Panasonic PV-DM2799 27" TV-DVD-VCR
The SMPS is not running and I found an open resistor, and a shorted STRG6651 power converter chip. D1508 was also shorted.
Scraping the coating off of one side of the 1/4W resistor, I was able to measure as high as 100 Ohms from each end to the break in the center.
It's not at all burnt, but ~200 Ohms or so isn't even close to the color code (any way I read it). My trick didn't work this time!
The colors on the resistor are as follows: BLUE - GRAY - BROWN - RED - WHITE
or it could be read: WHITE - RED - BROWN - GRAY - BLUE
The STRG6651 reads 5 Ohms from pin 3 to pin 4 so I figure it's toast.
Bil Green PC 1000 Mammoth Lakes, CA 93546 760-924-1000
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