Peale
Active member
I thought that I had a thread about this monitor already (well, I kinda do, but for another issue) but, I can't find it.
25K7000, missing red. Tube is fine (test tube). Neck transistor is fine. Swapped out the neckboard to rule that out.
Started tracing the circuit back from the neckboard connector back to the video connector. Didn't get far - when I metered R35, which should be 1K, I was getting 3.6 Ohms (in circuit). The other resistors for the other colours were giving me ~750 Ohms in circuit.
Pulled it, and it's reading fine.
Pulled IC1, and the resistors appear to be reading in-spec now. Strangely, the pin for red was bent at a weird angle. I'm going to install a socket, and see if a) a good connection fixes the red issue, or b) replacing it fixes the issue altogether
25K7000, missing red. Tube is fine (test tube). Neck transistor is fine. Swapped out the neckboard to rule that out.
Started tracing the circuit back from the neckboard connector back to the video connector. Didn't get far - when I metered R35, which should be 1K, I was getting 3.6 Ohms (in circuit). The other resistors for the other colours were giving me ~750 Ohms in circuit.
Pulled it, and it's reading fine.
Pulled IC1, and the resistors appear to be reading in-spec now. Strangely, the pin for red was bent at a weird angle. I'm going to install a socket, and see if a) a good connection fixes the red issue, or b) replacing it fixes the issue altogether
