- Printer roller rejuvenator recommendation? - 1 Update
- 1988 Fender Princeton Chorus amp - 7 Updates
- how to bypass dremel tool internal variable speed control? - 1 Update
| Brian Moore <brianmooreobgyn@gmail.com>: Jul 18 09:12AM -0700 FWIW..... I needed to refurbish the printer rollers on a Dell P1500 this weekend. I read everything I could find about what products to use or not use. I have a chemistry background so that helped. At any rate, I settled on the following simple cocktail for restoring the rollers.... It worked fantastic: 1 teaspoon DOT brake fluid 1 teaspoon naphtha (old fashioned lighter fluid) 1cc acetone First I scrubbed the rollers lightly with soapy water and a lint-free towel. I mixed the above in a Dixie cup. Then I rubbed this cocktail on each roller with a Q-tip, and wiped it off with the lint-free towel within 30 seconds. Then I repeated the application, wiped clean again. I was amazed. The printer works again, it was throwing the "jam" sensor every time, because the paper wasn't advancing. |
| cvalona09@gmail.com: Jul 17 12:59PM -0700 |
| cvalona09@gmail.com: Jul 17 01:10PM -0700 > you might suggest that I try changing. > Stay safe, Charles > NOTE: I live at least 200 miles from the nearest repair station so I'd really like to fix this problem myself with your help of course :) Thanks for your help everyone, however, the IC's MN 3101 and MN 3007 are stock parts that came out of my completely stock virgin 1988 Solid State Fender Princeton Chorus amp. Not sure why you're not seeing them ? |
| cvalona09@gmail.com: Jul 17 01:10PM -0700 |
| cvalona09@gmail.com: Jul 17 01:18PM -0700 On Thursday, July 16, 2020 at 5:05:30 AM UTC-7, abrsvc wrote: > None of the Princeton models that I found have the chips you describe. Can you post the exact model from the plate? The only Princeton Chorus model I found has DSP in the model name as well. > I have some hardcopy schematics around that I will check as well, but any additional info you can provide will help. > Dan Thanks Dan, My 1988 Fender Princeton Chorus Model PR82 Made In USA is completely stock, a totally virgin amp. The IC's MN 3101 and MN 3007 are stock parts that came out of this amp. I replaced them with new ones yesterday, but no change, the Chorus is still having problems. The pilot light comes on, and both the Rate & Depth controls seem to be working, but the FX is very very weak. BTW...this is not a Princeton that uses DSP...the amps that featured DSp effects came after the PR82 models and don't sound near as good. Stay Safe, Charles |
| cvalona09@gmail.com: Jul 17 01:20PM -0700 On Thursday, July 16, 2020 at 2:52:19 PM UTC-7, Phil Allison wrote: |
| cvalona09@gmail.com: Jul 17 01:21PM -0700 |
| cvalona09@gmail.com: Jul 17 01:23PM -0700 > you might suggest that I try changing. > Stay safe, Charles > NOTE: I live at least 200 miles from the nearest repair station so I'd really like to fix this problem myself with your help of course :) My 1988 Fender Princeton Chorus Model PR82 Made In USA is completely stock, a totally virgin amp. The IC's MN 3101 and MN 3007 are stock parts that came out of this amp. I replaced them with new ones yesterday, but no change, the Chorus is still having problems. The pilot light comes on, and both the Rate & Depth controls seem to be working, but the FX is very very weak. BTW...this is not a Princeton that uses DSP...the amps that featured DSp effects came after the PR82 models and don't sound near as good. Stay Safe, Charles |
| "Ron D." <ron.dozier@gmail.com>: Jul 17 11:12AM -0700 In the Dremel's I've taken apart there are few components because it's triac speed control (light dimmer). probably close to this: https://www.electroschematics.com/motor-speed-regulator-with-triac/ A jumper between the two terminals other than the one going to T2 is all you have to do. if there is a number on the part. You jump MT1 to MT2. e.g. https://www.nteinc.com/specs/5600to5699/pdf/nte5621_27.pdf All pin outs may not tbe the same. |
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