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2250B is not powering on at all

Yes, the brown wire from the selector has continuity with one of the prongs on the plug.
With the power switch on, I am NOT getting continuity from the other prong on the plug to the red wire on the voltage selector.
That I guess is not good?
 
Here is a table that you can use to check continuity between pins (not on the socket, but on the plug).
Power off, pull the voltage selector plug off and check continuity between the pins.
C is not a pin but the contact in the center of the plug.
Example: the first square is "C to BRN"
Fill in only the white squares, the gray ones are the reverse of the others.
NOTE: C is the center conductor ring (see yellow arrow in your photo below)

1790533712389.png1790534009327.png
 
Last edited:
Thanks. Based on your tests and prior voltage measurements, I think this is the AC path to the transformer. I included all of the prior voltage measurements that you made.
But, there are two that we didn't make and hopefully you will get good results when you measure these.
  • I have shown two AC paths, one from the fuse F001 to the voltage selector jack J023 Pin 7.
  • Follow the pink dashed lines:
    • Voltage comes in on Pin 7
    • Voltage Selector jumpers it to Pin 5
    • The green wire goes to transformer primary center tap
    • Comes out of transformer on the YEL wire then to Voltage Selector "C" contact
    • "C" contact is connected to Pin 1 and the BRN wire
    • Pin 1 connects to the 120VAC input
    • The 2nd path goes from Pin 7 to Pin 3 (or Pin 5 to Pin 3) to the transformer primary center tap RED wire
    • It goes through the transformer and comes out on the BRN wire which also is connected to Pin 1
    • The BRN wire is the 120VAC return.
We need to measure the following AC voltages with power on and power switch ON:
  1. Transformer GRN to YEL wire ACV
  2. Transformer RED to BRN wire ACV
1790537722930.png
 
So it looks like AC power is not even getting to the Voltage Selector plug.
Measure ACV from Pin 7 to Pin 1. If it is not 120VAC, then you need to pull and measure the resistance of fuse F001. It should read 0 Ohms.
 
dankik said:
So it looks like AC power is not even getting to the Voltage Selector plug.
Measure ACV from Pin 7 to Pin 1. If it is not 120VAC, then you need to pull and measure the resistance of fuse F001. It should read 0 Ohms.
Click to expand...
Is Pin 7 to Pin 1, the same as red to brown on the voltage selector? If yes, then the voltage from Pin 7 to pin 1 is 0 vac.
 
OK, you previously measured 120 VAC on the switched outlet on the back of the receiver.
The only difference is that the fuse F001 in in between those two points.
Check the voltage from the brown wire to one wire coming from the fuse holder, then check the voltage from the brown wire to the other wire on the fuse holder.
What do you get?
 
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