Jetkidish
Active member
Hey Everyone,
I'm working on a Polo 25" with vertical collapse and it's been kicking my butt.
The monitor went into collapse, was left off for about 30 min, turned back on and worked for another 30ish minutes before going back into collapse.
Currently I've done the following;
Subbed IC104 and IC103 from another known good chassis
Checked R167 and R177, both test good in/out of circuit
Checked continuity down to the remote board, no issues, pots test good
Chassis was re-capped about 3 years ago, but has been running nearly daily. Just for fun, based on the flowchart out there, I went ahead and replaced caps C144, C142, and C137
Re-flowed the majority of the chassis, tested continuity between points and been looking for any signs of cracks in the board
I have 26 VDC at TP31
All of this and still no change.
Visually I don't see anything wrong on the chassis, R255 looks a bit toasty but still reads at 150 ohms.
Any suggestions on what to check next?
I'm working on a Polo 25" with vertical collapse and it's been kicking my butt.
The monitor went into collapse, was left off for about 30 min, turned back on and worked for another 30ish minutes before going back into collapse.
Currently I've done the following;
Subbed IC104 and IC103 from another known good chassis
Checked R167 and R177, both test good in/out of circuit
Checked continuity down to the remote board, no issues, pots test good
Chassis was re-capped about 3 years ago, but has been running nearly daily. Just for fun, based on the flowchart out there, I went ahead and replaced caps C144, C142, and C137
Re-flowed the majority of the chassis, tested continuity between points and been looking for any signs of cracks in the board
I have 26 VDC at TP31
All of this and still no change.
Visually I don't see anything wrong on the chassis, R255 looks a bit toasty but still reads at 150 ohms.
Any suggestions on what to check next?

