Problems monitor 33"

[kapotik]

Hey guys, sorry for my English, google is my friend, I tell them a few years ago bought a monitor 33 "with chassis Sharp Image 15kHz or I think, the question that for space never hize walk, now I I decided to start it up and try it without changing all capacitors, simple task since some electronics were and had already done that before in another chassis, the issue is on but the monitor shows no image, with VGA cable probe and soft 15 with separate synchronicities and nothing, also with plate converting VGA to CGA and nothing the same, I have some photos and a video have if I can help thanks.






el chassis















video



diagrams:

http://arcarc.xmission.com/PDF_Monitors/Sharp%20Image%20134%20Trouble.pdf

http://arcarc.xmission.com/PDF_Monitors/Sharp%20Image%20134%20Schematic.pdf

[Fixed video link -- Scott]

[grantspain]

looks like video b+ is missing or screen volts is really high or the video signal is not correct
screen volts is the pot beneath the focus on the flyback transformer-turn it anti clockwise
the video b+ is from pin 4 of the flyback,goes through a safety resistor-it will be open circuit if 200v b+ missing

[kapotik]

Thanks for your prompt response, screnn pot is at least B + I have to check it.
Question: This chassis is 15kHz or 24kHz?

Thank you

[grantspain]

remember is said video b+,that is not the same as power supply b+

I have seen those chassis as 15khz and 24khz

[kapotik]

hello, I do not quite understand that you mean VIDEO B +?
give me an explanation for dummies,

thanks

[grantspain]

hello, I do not quite understand that you mean VIDEO B +?
give me an explanation for dummies,

thanks

its the voltage that runs the video amp circuit,normally 200vdc
it comes from the flyback transformer

[kapotik]

 if we check and this ok.