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GE 3-5875A Superbase Power on the clock and no power on the radio
For clarification.... feeding 13.8vdc in I would not expect you to have the clock as it is a separate winding off of the AC transformer.
(also clarifying here) if you attach 13.8 vdc power supply... and then REMOVE the AC cord from the jack on the radio...(because there is a switch inside that jack! You must remove the AC cord for the DC to get in).......
If ALL of that is right..... the radio STILL doesn't come on?
I would check the diode (D24, but I doubt this because you say the fuses are good. If the reverse protection diode is shorted, usually a fuse blows)
Maybe check those 2 coils (L8 and CH to make sure that they aren't opened up)
Do you have a DMM or something to measure voltage in this area?
If you do, that and this schematic snippet could help speed this up just walking through the circuit looking for voltage and noting where it drops out.
Additional very important question......
Do the meter lights come on? You say the radio doesn't power up... but I really need to distinguish THIS! Do those light bulbs come on or not?
This is important because those two bulbs are powered IMMEDIATELY after that coil marked 'CH' on the schematic snippet. So if they aren't powering up.... then DC just isn't making it in for some reason.
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