View Single Post
Old 7th Dec 2021, 5:22 pm   #8
SjjBeard
Diode
 
Join Date: Dec 2021
Location: Manchester, Greater Manchester, Northwest, UK.
Posts: 6
Default Re: 746 no dial tone. Inexperienced repairer hoping for help.

Quote:
Originally Posted by Nickthedentist View Post
You should be able to see fine wires coming from the coil, soldered to the pins embedded in the plastic, which then go through the PCB and are soldered to its pads.

It's difficult to see from a photo, but it looks a bit iffy in that area.

When you get your meter, you can do some resistance checks to see if the ASTIC is OK. The expected DC resistance of its windings are printed on the ASTIC, and its terminal numbers are moulded into the top of its plastic former.
Hi Nick

The readings are as follows

1-2 = 10.8 (11 expected)
2-3 = 14.1 (7 expected)
4-5 = 45.3 (23 expected)

Of course, I don't understand the significance of these numbers but obviously the second two readings are around twice that of what's expected which can't be good?

Click image for larger version

Name:	01.png
Views:	73
Size:	14.3 KB
ID:	247469
Click image for larger version

Name:	03.jpg
Views:	80
Size:	31.5 KB
ID:	247470
SjjBeard is offline