Hello all, after years of working great the monitor in my Centipede decided to die. Blank screen and no neck glow. I have installed numerous cap kits over the years and this one has me completely stumped... Needing HELP... This is what I know.
Pulled the chassis out and started replacing all the caps from the kit including a new flyback. During the process I discovered that the fuse 901 was blown. I thought "ahhh there was my problem" New capkit, new flyback, new HOT and new fuse, problem fixed." NOT!! After installing the chassis back into the machine, still dead. After numerous times in and out checking things, solder connections, traces, cap orientation, etc. Still finding nothing that jumps out. This is what I do know:
B+ out 125v (when first plugged in) Drops to 120v after 5 min of warm up.
166v into the resistor (same cold or warmed up)
166v on the case of the voltage Reg. Ground to chassis positive lead to button case
123v on the case of the HOT. Ground to chassis positive lead to button case
Don't hear the monitor cracking or warming up when plugging in.
No heater voltage when I take the leads and check H9 -H10 However if I take the black lead to chassis and red lead to either H9 or H10 it shows 54v.(strange, am I missing something here??)
After hours of frustration, numerous installs/removals of the chassis I went to bed last night. Turned off the room lights, machine was still on and in the darkened room, low and behold Centipede appeared on the screen ever so faintly. I checked brightness and it was all the way up.
Lost on which way to go now??
Thanks for your help. Haz
Pulled the chassis out and started replacing all the caps from the kit including a new flyback. During the process I discovered that the fuse 901 was blown. I thought "ahhh there was my problem" New capkit, new flyback, new HOT and new fuse, problem fixed." NOT!! After installing the chassis back into the machine, still dead. After numerous times in and out checking things, solder connections, traces, cap orientation, etc. Still finding nothing that jumps out. This is what I do know:
B+ out 125v (when first plugged in) Drops to 120v after 5 min of warm up.
166v into the resistor (same cold or warmed up)
166v on the case of the voltage Reg. Ground to chassis positive lead to button case
123v on the case of the HOT. Ground to chassis positive lead to button case
Don't hear the monitor cracking or warming up when plugging in.
No heater voltage when I take the leads and check H9 -H10 However if I take the black lead to chassis and red lead to either H9 or H10 it shows 54v.(strange, am I missing something here??)
After hours of frustration, numerous installs/removals of the chassis I went to bed last night. Turned off the room lights, machine was still on and in the darkened room, low and behold Centipede appeared on the screen ever so faintly. I checked brightness and it was all the way up.
Lost on which way to go now??
Thanks for your help. Haz
Last edited:



