Re: Adjusting monitor focus: Sun/Sony GDM-5010 PT

From: Remove _ for valid address (u_1061771155_at_csi.com)
Date: 08/21/05 

Date: 21 Aug 2005 18:57:23 GMT

In article <1124375568.782561.193570@f14g2000cwb.googlegroups.com>, jdgill@juno.com wrote:
>Most newer Sony's use an external Digital Alignment System (DAS)
>connected to a computer to make these adjustments. (Expensive). You
>might try and trace out the circuit grom the screen (G2) pin on the CRT
>neck board. There should be a large value resistor in the circuit.
>Changing the value of this resistor will often change the screen
>voltage and brightness. You have to experiment a little to find a good
>value. I use an resistor box and start at the highest value and then go
>down until I find the best brightness. Then I solder a fixed resistor
>in the circuit.
>Hope this helps....
>John

Focus is adjusted using the traditional pots. Here's the extract from
the n31s_fcs.stp file that drives DAS for the GDM-5010:

     BEGIN
        SCREEN "FOCUS ADJUSTMENT" 15 1 65 22
        message full_screen "Perform the focus adjustment:\
        a) adjust the [F2] focus pot for best vertical focus.\
        b) adjust the [F1] focus pot for best horizontal overall focus.\
        c) repeat [F1] and [F2] as there is some interaction."
        BUTTON CANCEL
        BUTTON OK
     END

G2, however, is adjusted using DAS control.

Mike.