Sony ssm721amr monitor keeps rolling

[Schneezy]

My Sony monitor ssm721 amr keeps rolling, does anyone know how to fix it? If not is there anyone who has one for sale out there

[sch911]

Just replace it with a low cost LCD panel from amazon. Rvcams has adapters to convert the plugs for most systems. Did this for my previous MH and never looked back. The new 7" LCD panel cost less than $50.

[DrewE]

You can download a free pdf copy of the service manual from this URL.

According to the manual download, potentiometer RV501 on the "A" circuit board (the main board mounted on the bottom of the unit) is the vertical hold control. Unless there's a little hole to access it through the case bottom, you'd have to disassemble the display to adjust it. Since this is a CRT screen, a certain degree of caution is prudent when adjusting with the case removed, both since the CRT is breakable (and under vacuum), and since there are some quite high voltages present.

The manual doesn't seem to give much of a clue as to where on the circuit board this potentiometer is located, unfortunately.

[fcooper]

rvcams.com has a replacement that will work, but it's not cheap at $381. You can install a complete color LCD system for less if you're a do it yourself type.

Fred