Nov 12, 2017, 9:58 PM
Post #105 of 127
Let's go over what I did so there's no confusion:
Re: [jts1957] JVC HR-D190EN doens't take tape
[In reply to]
1- Was to told to check CN604. Checked Pins 1 and 5, in this process, something shorted and VCR stopped turning on (display works).
CN608 is near the area of pin 1 and 5 of CN604. It's possible that I made continuity between those two. (I mentioned this to see if there is any clue that might reveal the problem).
2- When this happened, I looked for continuity in the fuses, and CPx. Found that CP3 had no continuity, as well as CP4.
3- Solder a piece of thin wire to close the circuit between both ends of CP3, and another piece of wire to close CP4. Both had continuity after that soldering, but not between them. Turn the VCR on, and no magic smoke appeared.
4- Performed all the tests you told me too, measuring DVC in different points. The weirdest result I got, in my opinion, was on Pin 6 of IC601, which was supposed to give me like 0.1 V (according to your post) and was in fact getting like 12 V.
5- So today I decided to see if desoldering both wires on CP3 and CP4, would change any voltage on IC601. Since I hadn't checked any CP before this happen, I thought that maybe they were bad from the beginning. To my surprise, pins 1 and 2 where still getting 5 V. and pin 6 was getting 5 V.
Now, correct me if I'm wrong, but I understand that CP are like fuses, so if the circuit has no continuity, it's open, and no current is going through. The circuit interrupted because of a short I made, and CP broke. Soldering a piece of wire should let the current go through the circuit. I never said I jumpered CP3 to CP4.
So, if all the events are clear, is there anything else I can checked, or should I just throw the unit away?
I really thank you for all the help you gave me so far.