Minnesota 13
New member
I am not a monitor fix-it person.
I acquired the Nanao MS8-26SU as a non-working monitor in a non-working game. I found fmonitor use F902 a 2A fuse blown and previous "tracks" of a previous owner attempting to resolve the problem or previous problems such as the FBT Screen adjustment maxed out and safety silicone on B+ adjustment removed.
I removed the Q533 2SD1880 transistor and it tested OK.
I removed the Q901 2SC3306 transistor and it tested OK.
I put in a Cap kit which replaced almost all caps on this monitor board and neck board with the exception of maybe one, the biggest one.
I put the removed transistors back in, replaced the F902 2A fuse and reinstalled the circuit board.
I powered up the monitor stand-alone with no input as I have nothing that would be easy to use to provide an input signal. Yes, I used a isolation transformer.
The F902 fuse is holding.
I adjusted the B+ to 92VDC using test points 1 and 2 on the monitor board - not sure if this is correct measuring points.
I found the white image on the CRT skewed, so I adjusted the yoke to straighten the image. I turned down the FBT screen adjustment to where there is just a white screen with horizontal lines that are narrow between lines at the top get wider between lines going to the bottom.
I don't know if trying to adjust the monitor using this white image is proper. I can't get the white screen with the lines to expand to full screen using vertical size, this is a horizontal monitor. The control will reduce the vertical size. The horizontal size is fine.
I can not get vertical centering to work.
What is with the horizontal lines with increasing spacing going down the screen?
So finally some questions: Is using this white screen OK to make these adjustments?
Why can't I get the vertical size and centering to work?
How does one get the degaussing to work on this monitor as it is a separate wire and plug for power input that has no connection in this cabinet? Can this be plugged in directly to some kind of AC power?
I have the manual for this monitor.
I acquired the Nanao MS8-26SU as a non-working monitor in a non-working game. I found fmonitor use F902 a 2A fuse blown and previous "tracks" of a previous owner attempting to resolve the problem or previous problems such as the FBT Screen adjustment maxed out and safety silicone on B+ adjustment removed.
I removed the Q533 2SD1880 transistor and it tested OK.
I removed the Q901 2SC3306 transistor and it tested OK.
I put in a Cap kit which replaced almost all caps on this monitor board and neck board with the exception of maybe one, the biggest one.
I put the removed transistors back in, replaced the F902 2A fuse and reinstalled the circuit board.
I powered up the monitor stand-alone with no input as I have nothing that would be easy to use to provide an input signal. Yes, I used a isolation transformer.
The F902 fuse is holding.
I adjusted the B+ to 92VDC using test points 1 and 2 on the monitor board - not sure if this is correct measuring points.
I found the white image on the CRT skewed, so I adjusted the yoke to straighten the image. I turned down the FBT screen adjustment to where there is just a white screen with horizontal lines that are narrow between lines at the top get wider between lines going to the bottom.
I don't know if trying to adjust the monitor using this white image is proper. I can't get the white screen with the lines to expand to full screen using vertical size, this is a horizontal monitor. The control will reduce the vertical size. The horizontal size is fine.
I can not get vertical centering to work.
What is with the horizontal lines with increasing spacing going down the screen?
So finally some questions: Is using this white screen OK to make these adjustments?
Why can't I get the vertical size and centering to work?
How does one get the degaussing to work on this monitor as it is a separate wire and plug for power input that has no connection in this cabinet? Can this be plugged in directly to some kind of AC power?
I have the manual for this monitor.