RE: Starwars and Amplifone Issue

Just for fun, try unplugging the degaussing coil.

Dave

From: owner-vectorlist@vectorlist.org
[mailto:owner-vectorlist@vectorlist.org] On Behalf Of PJ
Sent: Thursday, March 25, 2010 2:44 AM
To: vectorlist@vectorlist.org
Subject: Re: VECTOR: Starwars and Amplifone Issue

----- Original Message -----

From: Chris Loggans <mailto:cloggans@yahoo.com>

To: pj1@shaw.ca

Sent: Wednesday, March 24, 2010 3:55 PM

Subject: Re: VECTOR: Starwars and Amplifone Issue

PJ,

     I have seen this problem before. I know you have stated that the
output looks correct on the scope, but I would try replacing Q7 and Q8 in
the Bipolar output section of the AVG board (page 14B in the schematics).

Thanks,

-Chris

I replaced these transistors, as well as replacing the two 0.1uF caps by the
MPSu57s on the deflection board to no avail. I even tried to bridge the
current sense resistors with ceramic capacitors to see if it made any
difference with no luck.

So just to recap, the work done on the game to date:

-replaced all the 1N914 diodes and transistors on the deflection board,
except for the four 6A main rectifiers, the video output transistors, and
zener CR5.

-replaced all electrolytic capacitors on the deflection board and HV board,
including the 4700uF power supply filter caps.

-replaced the BU406D, the regulators, diodes, 50ohm resistors, and HV
transformer. The high voltage setup procedure completed.

-removed all brown jumpers on the deflection and HV boards.

-replaced the pots on the deflection board

-replaced the fuses on the deflection board

-repaired the fuse block and wiring on the power transformer block.

-recapped the ARII and added sense mods.

-added additional heavy leads between grounds on ARII, logic boards and
deflection board.

-replaced both 15v regulators and filter capacitors on the AVG

-replaced Q7 and Q8 on the AVG.

and still no luck...

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Received on Thu Mar 25 05:36:18 2010