Neotec 2515C Vertical collapse

[Q*Bert_OP]

I have a Neotec 2515CGA that's shrunken to a thin horizontal line. The vertical deflection IC (IC301) has been changed, that wasn't the problem. I have also changed C307 & C308.

The IC I installed was an NTE1855. I couldn't find an LA7835 at any of my usual suppliers.

The V HOLD pot is good, as well as the wiring between the chassis and remote board.

The picture turned from being clear and sharp to looking like a watercolor painting. I turned the game off, then back on, and was greeted with a thin horizontal line.


What next?

[lilshawn]

the original chip spec'd in the maunal for IC301 is an LA7836 not an LA7835

the NTE cross is an NTE7085 not an NTE 1855


%20[English].pdf]http://pdf.textfiles.com/manuals/ARCADE/K-R/Neotec%20NT-2515C%20NT-25E%2025in%20EGA-CGA%20Color%20Monitor%20[Service]%20[English].pdf

[Q*Bert_OP]

I know that, but the 7835 is what was on the monitor when I took it apart. It had never been serviced before.  Besides, no tech EVER re-installs the 2 screws close to the front of the tube 

[lilshawn]

Besides, no tech EVER re-installs the 2 screws close to the front of the tube 

I hear that! 

IC401?

it's tied to the vertical... it's where the timing signals for ic301 come from. i usually replace 401 first, then 301 if it's still flat lining.