Re: Trouble with WG6100

At this point you should probably use your Black Widow monitor as a test
bed for the nonworking boards. Just swap in a questionable board into the
good monitor and see if it works. Most likely, you'll end up with one of
three senarios.

1) One of the three boards doesn't work, but the other two do (guess which
one you should concentrate on?)
2) All of the boards work - this indicates a problem with wiring or the
chasis transistors on the bad monitor
3) You kill the working monitor - oops ;)

Something else to consider.. You should be careful using Bob's "upgrade"
kit. You need to figure out which revision your monitor is and upgrade
from there. Don't install all of the parts blindly, as later revision
boards don't need them all. I'm not sure if you can break the monitor from
installing everything though.. I haven't done the upgrades on any of my
monitors yet. It also seems to me that there are a couple transistor
diagrams on the deflection board that are drawn wrong. The pins are
labeled correctly, but the half circle is backwards. Of course, I may be
thinking of the g05. Does anyone know what I am refering to who can be
more specific?

Jon

At 02:51 PM 4/4/00 -0500, you wrote:
>>>>
Problems with a WG6100 - gee what else is new?
  
I got a Tempest with a dead monitor a few weeks ago and got around to
looking at it this past weekend. When I say dead - I mean dead - no power,
no neck glow, nothing.
  
I installed both a cap kit and an upgrade kit from Bob Roberts as well as a
LV2000. I resolderd all the connectors also.
  
I followed the instructions with the LV2000 and adjusted the voltages with
all the connectors on the deflection board unplugged. Carefully plugged
everything back in and fired the game up - the monitor had no signs of life
- after about 10 seconds the fuses at F100 and F101 blew.
  
Got the troubleshooting flowchart out. I replaced the fuses and also had
to replace the diodes at D102 and D103 - they fried when the fuses blew. I
then unplugged the connectors at P100, P600, and P700 and fired the monitor
up - the LV2000's led's came on and the fuses didn't blow. Proceeded to
hook P100 back up - no problems. Hooked P600 and P700 back up and *POOF*
two more fuses down the drain. But it didn't take the diodes out this time.
  
So at this point you say its the chassis transisitors. I replaced all of
them and the mica insulators as well. They all got a liberal amount of
heatsink goop too. I checked continuity to make sure they are not making
contact with the chassis and double checked them using the diode test that
Gregg Woodcock describes. All are good.
  
Anybody ever have any problems with the kits from Bob Roberts?? Somebody
said that the transisitors he includes in the upgrade kit for replacements
at Q604 and Q704 are the wrong ones. But I installed this exact same
set-up in a monitor for a Black Widow with no problems.
  
Anyone have any suggestions as to where to proceed from here? Should I
replace the transisitors at Q603, Q703, Q604, and Q704? Wondering if they
are the problem now.
  
Thanks for the help.
  
Walt

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Received on Tue Apr 4 19:42:42 2000