Yeah, I re-soldered R14, R20, and R21. I hooked it back up after re-soldering those resistors and the rectifier and the plug-in receptacle and still didn't get the display to light up. Then, again, as I have done before, I "flicked" the display with my finger and it lit up for a few seconds and then went out again.
Should be a capacitor - that's always what a 'C' designator means in my 25+ years of circuit design experience, plus the value of 47 (with unknown power of 10) is a typical capacitor value....I have another problem now, though, on my ATC display. While having it hooked back up in the car, and "moving" and "wiggling" components and wires around looking for a bad connection, I accidentally broke off the Capacitor at C16. That is a capacitor, is it not?...
If I had to guess, an aluminum or tantalum - but only a guess. If so, probably is 47uF. But that's guessing on my part.Does anyone know what size capacitor that is at C16? All it says on it is "47" and "CFC" and "7L3". I figure the "47" is 47 uF? Is that right? I have no idea what 7L3 means.
Certainly not. But without knowing the specs., it's a gamble.Do I have to put another surface mount capacitor on the board?
Huh! Never noticed that before. My guess is that whoever did the p.c. board layout put that Q1 on the wrong side of the board - it likely is intended to identify the device on the other side of the board that owns the three leads you see (no doubt a transistor).Another thing bothering me is that "backwards "1Q" right below C16 on the board. What does the backwards "1Q" mean?
Assuming yours has a problem other than a bad solder joint, yours is a very odd duck. The display not working is *always* a bad solder joint - yours being the only exception I've seen or read about. Life's too short - find another unit, or buy one from someone here selling one - even if it needs to be re-soldered, that would be the way to go.Short of finding another capacitor, I'm going to hit up a few more junkyards and hope to find another display.
Pretty sure no.Another thought: Is there a circuit diagram floating around anywhere for the ATC display?
Yes - I'm aware it's backwards. What I was meaning to say before is that whoever did the board artwork put it on the wrong silkscreen layer (there's one on both sides of the board), so it came out mirror image. A mistake done on the computer when doing the board artwork - they just had the wrong layer turned on when they aded that designator....The "1Q" is MORE than on the wrong side of the board. I figured out it was an identification for the voltage regulator on the other side. Look at it. The "1" is backwards and the "Q" is backwards. Like how you would see it in a mirror. At least on my board it is. Weird...
Ahhhhhhhh....................got it. Misunderstood your reply.You're welcome.
Yes - I'm aware it's backwards. What I was meaning to say before is that whoever did the board artwork put it on the wrong silkscreen layer (there's one on both sides of the board), so it came out mirror image. A mistake done on the computer when doing the board artwork - they just had the wrong layer turned on when they aded that designator.
I switched mine over to an ATC head when I replaced my roof, body and dash harness with ones from an 02 Special. The MTC has 2 plugs and the ATC has 1 smaller black plug. So you would need to be creative. The blower motor resistor also has to be changed and thats a PITA. There is almost no room to maneuver under the blower housing. I dont use my climate control ever, I hate AC so I cant tell you if its worth it or not. I was forced to do it because I had to change the dash harness to run SKIM, and I needed SKIM to run my Special PCM. If you do use AC, then its a nice feature. Set your TEMP and youre good to go. And instead of 5 fan speeds like there is with MTC, theres 8 or 9 with ATC.Did you find what you needed? My local yard has 4 or 5 cars with ATC displays; I was starting to pull one from an Intrepid when I hit this site from my phone and realized there was more work than I cared for to convert; that was 3 days ago. Of course I have no way of knowing if they are operational. Let me know...