Sorry I wasn’t ignoring you. ?I’ve had a lot going on between the radio and home. ?I lost the springs for the display retention clip and was waiting for replacements to come in before I pulled the display back apart for pictures. ?I couldn’t think of a good way of explaining it without a visual. ?Springs were supposed to be delivered by the 13th, then delayed to the 18th, and I still haven’t received them. I also got side tracked and forgot to get back to you, so again I apologize. ?I remembered while typing this, I was also trying to reply with the schematics and part numbers in front of me to reference, but I was at work. ?Capacitors in question are C501 and C502. ?I replaced them with Digikey P/N 478-8242-1-ND. ?The 20V capacitors I tried to use but were too thick for my liking were 718-1970-1-ND.
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The 2 capacitors in the white circle according to the service manual are supposed to be 100uf 16v tantalum capacitors. ?These are prone to failure and cause what it know as the dreaded “click-click” problem where you hear the relay click on and off, but radio never powers on. ?
The display unit that failed on the 2 radios I’m working on, had previously been worked on and had 2x 47uf 16v capacitors which failed. ?I wanted to replace them with 100uf 25v capcitors with hopes that the higher voltage rating would prevent them from failing again. ?However the 25v capacitor were slightly thicker than the original 16v and even though the panel went back together fine, you could feel a noticeable bump over the capacitors. ?I didn’t like the bulge from the extra pressure so I swapped back to the 16v rated capacitors.
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hopefully this helps you a little bit. ?It’s been one thing after another on this radio. ?Turns out logic board has an audio problem. ?I’m thinking it’s an IC (IC601), but have not had a chance to chase signals simply because it does not power on now due to a ribbon cable getting damaged. ? New ribbon cables on order. ?I suspected the audio problem was the amplifier circuit and when I checked it over, it looked fine and when I tested the logic board in my 7000, audio went out and I was able to isolate the problem to the Logic unit. ?When I went to put the main board back in the 7000, I was frustrated with some issues at home and got careless with a ribbon cable and one of the wires got pinch and a few of the traces came off. ?
