wxforecaster
Member
I've separated this out from my Dig Dug repair thread since this aspect of my troubleshooting isn't game specific at this point.
What we know so far:
1.) Despite PCB problems, the monitor appeared dead with no neck glow.
2.) I tested the B+ and got a whopping 166V, which explains item one (X-ray shut down).
I have removed and cleaned the chassis/neckboard. NOTE this is the 13" FBO version, and I'm having a lot of trouble finding documentation or past repair logs on it. Here's what I've noted:
1.) Flyback inspects good
2.) I tested the HOT putting a multimeter in diode mode and putting the black lead on the tab closest to the flyback and the red on the other one. I measured 0.000V which I perceived as dead. Is this the proper way to test these on the FBO?
3.) I tested the voltage regulator by putting a multimeter in diode mode and putting the black lead on the tab at the back of the chassis and red at the closest. I got a value of 0.63V. Again, what is the proper way to test this.
4.) Both F901 and F902 are surface mounted, but visually inspected and continuity tested as good.
5.) I've tested most of the resistors and they all are good. I did notice that R314 (back left corner) is a 4.7k ohm instead of the 390 ohm.
Any help on where/how to proceed with testing (especially 3/4 above) would be greatly appreciated. Right now I have a HOT, flyback and cap kit enroute. The FBO version is strange because a number of components from the CBO aren't even present on the board.
Evan
What we know so far:
1.) Despite PCB problems, the monitor appeared dead with no neck glow.
2.) I tested the B+ and got a whopping 166V, which explains item one (X-ray shut down).
I have removed and cleaned the chassis/neckboard. NOTE this is the 13" FBO version, and I'm having a lot of trouble finding documentation or past repair logs on it. Here's what I've noted:
1.) Flyback inspects good
2.) I tested the HOT putting a multimeter in diode mode and putting the black lead on the tab closest to the flyback and the red on the other one. I measured 0.000V which I perceived as dead. Is this the proper way to test these on the FBO?
3.) I tested the voltage regulator by putting a multimeter in diode mode and putting the black lead on the tab at the back of the chassis and red at the closest. I got a value of 0.63V. Again, what is the proper way to test this.
4.) Both F901 and F902 are surface mounted, but visually inspected and continuity tested as good.
5.) I've tested most of the resistors and they all are good. I did notice that R314 (back left corner) is a 4.7k ohm instead of the 390 ohm.
Any help on where/how to proceed with testing (especially 3/4 above) would be greatly appreciated. Right now I have a HOT, flyback and cap kit enroute. The FBO version is strange because a number of components from the CBO aren't even present on the board.
Evan
