Re: wg 6100 problems

My HV cage has decided to behave itself now for whatever reason.

For the deflection board, can you test it outside the monitor with just the power inputs and the power transistors hooked up? I want to measure the voltages at various points to compare against the manual....what is the least I need to hook up to get those to be accurate? I was hoping I could have power inputs using a ZVG and power brick, the deflection board on a bench plus the 2 power transistors as a easier way to test the board. If I need the deflection transistors hooked up, can I disconnect the HV board to avoid that? The problem with my board is definitely something on the board itself.

From: Werner Sharp
Sent: Tuesday, June 29, 2010 12:42 PM
To: vectorlist@vectorlist.org
Subject: VECTOR: wg 6100 problems

Hi all,

I'm trying to revive a dead WG 6100 and could use some advice.

1st problem: With a deflection board with a LV2000 installed, the monitor will power up and get HV some of the time but usually the negative voltage LED of the LV2000 will go out and the HV with disappear. This happens with nothing plugged in but the deflection board, power transistors and connector to the HV board. It does not happen with a known good HV board so its something on the HV. I replaced the three transistors and electrolytic capacitors. Any ideas what component could be bad? The diodes tested okay with my DMM.

2nd problem: I'm only getting upper right deflection with this deflection board. The chassis transistors have been replaced and test out okay. I could wiggle power plugs and the upright heatsinks on the board and get the whole top half to display. I reflowed the solder on the connectors and transistors and now never get the whole half to display with wiggling anything. Besides the chassis transistors, what is the next obvious component to have a problem? The MPS07/57 transistors or something else?

3rd problem: A different deflection board with no input does not light up the spot killer. What would cause the spot killer circuitry to fail?

Thanks for any ideas.

Werner Sharp

---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com
Received on Tue Jun 29 21:14:46 2010