WG6100 and Bob's K6100 Deluxe Kit

[modessitt]

1) Looks like your brightness is up too high (vector lines connecting different things).

2) Is your picture crooked? Yoke misadjusted?

3) use your PCB pots to get your image centered vertically and the proper width

4) I saw this problem recently when someone replaced a resistor in the deflection circuit with the wrong value. They had replaced R701 with a 1.3-ohm resistor instead of a 1.3k-ohm. As R701 is in a parallel circuit with the rest of the amplification circuit, and is connected to ground, then entire signal for that side of the screen was shunting to ground. Replaced it and it was fixed...

 

[alejandromad]

1) Looks like your brightness is up too high (vector lines connecting different things).

-- Yes, the brightness was high in a couple of the pics... needed slight readjustment after I swapped the chassis transistors.

2) Is your picture crooked? Yoke misadjusted?

-- I think the picture looks crooked due to some parallax. I was standing to the side of the machine when taking the pic... so my ugly mug wouldn't be reflected in the tube.
The image is shifted to the left a bit too (where you can see it at all) but that's most likely because I haven't performed any monitor adjustments. I would like to get an entire image before I go through that adjustment process.

3) use your PCB pots to get your image centered vertically and the proper width

-- I will have to get a mirror set up and review which pots do which... still only gonna have half a picture though ;-)

4) I saw this problem recently when someone replaced a resistor in the deflection circuit with the wrong value. They had replaced R701 with a 1.3-ohm resistor instead of a 1.3k-ohm. As R701 is in a parallel circuit with the rest of the amplification circuit, and is connected to ground, then entire signal for that side of the screen was shunting to ground. Replaced it and it was fixed...

-- I actually read all the resistors in the cap kit with a multimeter before installing them... not because I'm extra clever but rather because I couldn't really see the color code on some of them (small and lightly colored)... they were all as the sheet in the kit claimed them to be. I will pull the deflection board and check that resistor however... and any others you recommend.
Wish they could be checked in-circuit...
Oh well.

Thanks for the continued assistance.

 

[Maxstang]

Have you checked the four heat sinked transistors on the deflection board. Having one of them dead will produce that pic.

 

[alejandromad]

Have you checked the four heat sinked transistors on the deflection board. Having one of them dead will produce that pic.

Nope... I did not replace them. Those are the MPSU07 and MPSU57 transistors I was mentioning a couple posts back. I am suspicious of Q603 (or Q703) but I am going to go ahead and change all 4 of them.

Thanks for confirming.

 

[alejandromad]

alright... replaced Q603, Q604, Q703, Q704 and there was absolutely no change.
Still only have the upper half of the screen as shown in earlier post.
Any Ideas?