Hi guys
I’m hoping you guys can help me out here with a problematic MS8-26su
Ok to start off
It’s a sega virtua racing
Nanao ms8-26su
First fault when it came into my workshop was
Vertical collapse
Narrowed down to R433 and R.. next to it lol
This brought the image back perfect
While I have a chassis out I usually do a cap kit too
Rules out any other issues.
Ok so the game was fine and running sweet, went for lunch and left it on a soak run.
Came back.. playing blind :-/
Rebooted, came back on but went off less than a minute later.
Reboot got nothing but playing blind.
Now n again the screen would come on but moments later a little click from the chassis as it turned the crt off !!
So I did a few tests
B+ 90v
Adjusted to 92.0vdc as per service manual
Tested x-ray voltage
28v
Service manual says should be 20-24v
Tested resistance with F902 removed to TP
SHOULD READ 2-5kohms
But this reads 6.3kohms
I’m a bit stuck here as if I remove components to test I’m unable to cross ref against any data sheets
Firstly could anyone share a parts list ?
Secondly does anyone know what values these parts are and a suitable replacement I can buy from Farnell’s or eBay
ZD501
D560
D561
Thanks in advance
Dave
I’m hoping you guys can help me out here with a problematic MS8-26su
Ok to start off
It’s a sega virtua racing
Nanao ms8-26su
First fault when it came into my workshop was
Vertical collapse
Narrowed down to R433 and R.. next to it lol
This brought the image back perfect
While I have a chassis out I usually do a cap kit too
Rules out any other issues.
Ok so the game was fine and running sweet, went for lunch and left it on a soak run.
Came back.. playing blind :-/
Rebooted, came back on but went off less than a minute later.
Reboot got nothing but playing blind.
Now n again the screen would come on but moments later a little click from the chassis as it turned the crt off !!
So I did a few tests
B+ 90v
Adjusted to 92.0vdc as per service manual
Tested x-ray voltage
28v
Service manual says should be 20-24v
Tested resistance with F902 removed to TP
SHOULD READ 2-5kohms
But this reads 6.3kohms
I’m a bit stuck here as if I remove components to test I’m unable to cross ref against any data sheets
Firstly could anyone share a parts list ?
Secondly does anyone know what values these parts are and a suitable replacement I can buy from Farnell’s or eBay
ZD501
D560
D561
Thanks in advance
Dave