Antique Radio Forum for Collectors
HomeHome  RegisterRegister  FAQFAQ  SearchSearch  Log inLog in  
The Forum is Now Easier to Navigate. We now Have Catagories then the related Forums.

Share | 

 How to find those bugs with a red pencil

Go down 
Cliff Jones
Site Administrator
Site Administrator

Join date : 2010-11-22

PostSubject: How to find those bugs with a red pencil   2011-01-21, 8:59 pm


Troubleshoot your projects, rather than probe around and try to guess
Follow these steps and accomplish repairs with less headaches.

1. Do a visual check for burned and damaged components and find out the cause.

2. List the cause of trouble if available (costumer complaints of Weak reception, excessive hum etc.)

The first and most common error is wiring , and most certainly in kit building

3. You need the Schematic and a red pencil

4. Pick a starting point, usually the cathode of the rectifier, then trace out each wire, and compare it with the schematic. If it is correct cover the trace with a red pencil line.

5. When you come to a component, in the line being traced, check it for proper rating and value.
If the value and rating are correct the place a small check mark next to it.

6. As you trace each wire also check for a good clean solder joint, sometimes flux covers a bad solder joints

7. Make the needed repairs and fixes.

Do not plug in the repaired radio or test equipment at this time.

8. Now you need to look for shorts, so turn on your ohmmeter and check resistance values against the manufacturer’s spec's (allow 20% in readings).

9. Setup a Variac and isolation transformer, or dim bulb tester.

10. Make sure and add a fuse inline if the project doesn't have one first.

11. Plug in and turn on the equipment and see if it operates.

12. If it doesn't Tubes and transistors, need to be tested next.

13. Voltage checks are then needed if it still doesn't work. Again 20% variance is acceptable.

I'm a Science Thinker, Radio Tinkerer, and all around good guy. Just ask Me!
Back to top Go down

Join date : 2010-11-25

PostSubject: Re: How to find those bugs with a red pencil   2011-02-11, 2:40 pm

Great info . Makes it simple enough. Did i check that i think i did maybe not. Mad
Back to top Go down
How to find those bugs with a red pencil
Back to top 
Page 1 of 1
 Similar topics
» Finding bugs in a empty house where homeless people were staying that lost their jobs.
» Do you find visualisation easy...
» help. i cannot find my guide
» Try to find an old friend, Nienburg, Germany

Permissions in this forum:You cannot reply to topics in this forum
ANTIQUE-RADIO-LAB :: Radio Repair Bench-
Jump to: