On Thursday, July 6, 2017 at 11:18:38 AM UTC-4, wrote:
On Thursday, July 6, 2017 at 7:17:12 AM UTC-4, rickman wrote:
wrote on 7/6/2017 1:00 AM:
On Wednesday, July 5, 2017 at 9:34:41 AM UTC-4, wrote:
On Wednesday, July 5, 2017 at 3:39:44 AM UTC-4, John Robertson wrote:
On 2017/07/05 12:35 AM, wrote:
And if it has a large value (1000-4700uF) cap inside the feedback loop that is failing, that can cause severe linearity issues.

G²


Granted, however the OP did say he recapped the monitor and I didn't
want to doubt his statement.

John ;-#)#

--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

its an IC, an LA7833( nte1773) . i'll change it out and see what happens. i did change out every cap, and it was exactly the same. no better, no worse.

thanks much

just got done replacing the vertical IC, la7833. no change in the image. no better, no worse.

Looks like the 24 volt supply is generated by doubling the 12 volt supply.
Measure the 24 volt supply at pin 6. I bet something is wrong that this is
only 12 volts, maybe the diode?

--

Rick C


https://na.suzohapp.com/pdf/service_...vp2_manual.pdf

https://na.suzohapp.com/pdf/service_..._schematic.pdf

B+ is 12v3, 12V and 24V good. i was thinking yoke, but they ohm out good, and look like brand new. no physical damage.

Not saying the yoke is the problem, but a single turn shorted to an adjacent turn will not change the resistance reading on your dmm, but a single shorted turn will totally collapse the magnetic field of the coil.

A ringer is the best instrument to check for shorted turns.