WG 6100 Gravitar Help Needed

2Vizslas

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I did a total rebuild on the monitor. I followed the 6100 faq to try and help troubleshoot.
All voltages talked about check out good. No spot killer lit. Game will play fine I just can't seem to get the picture clear. i put the game in test mode and everything tests ok. I also installed the lv2000 and both led's are lit. Any suggestions. Thanks.
 

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I did a total rebuild on the monitor. I followed the 6100 faq to try and help troubleshoot.
All voltages talked about check out good. No spot killer lit. Game will play fine I just can't seem to get the picture clear. i put the game in test mode and everything tests ok. I also installed the lv2000 and both led's are lit. Any suggestions. Thanks.


You have your shield over the HV cage?
 
No I did not I was keeping an eye out for anything smoking etc. I installed the cover and it helped quite a bit but the letters are still off. Thank you for the help. Here are the new pics.
 

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Are you using MPSU07 & MPSU57 transistors in Q603 & Q604, Q703 & Q704?

Are there capacitors fitted in C603 & C703

Have you got a pic of the deflection board please?
 
yes 704 is u07,703 is u57,604 is u07, 603 is u57. Not seeing the two caps you mention. Here are pics of the board
 

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Did you put the game in test mode and adjust the BIP POTS? I'm also thinking something is wrong with one of your transistors in the mpsu07/57 variety

Pat
HD
 
That's a P327, which is the newest revision of the board. C603 & C703 were removed from that layout (and it's recommended that they be removed, if you have one of the earlier P314 boards).

It looks like someone replaced the caps at C804 and C805 with radial ones. (They are normally axial). That's technically fine, as long as they're the right value, which should be 100uF, and 6.3V (or more) for the voltage.

Check all of the components you replaced, making sure that you put the small black transistors in the correct places, and that they are the proper ones for each spot. (When you say 'total rebuild', what exactly did you replace?)

What revision HV board do you have? I've never seen a missing cage make that much of a difference. (I run all of my monitors without them, and tested dozens of boards I've repaired without cages.) Is it a P329, or P316? Also, have you measured and adjusted the HV with a probe?
 
I have a 316 HV board. The caps for C804 and 805 are 100uf 10v bipolar. The kit I used was from Ian Kellogg. Full rebuild kit with chassis transistors. I measured the B+ using my multimeter set at dc volts . Pin 5 of p900 and the B+ at 501 on neck board.
 
I have a 316 HV board. The caps at C804 and C805 are 100uf 10v bipolar. The kit I used was from Ian Kellogg. Total rebuild kit with chassis transistors. I used my multimeter set at dc volts and measured pin 5 at p900 and the B+ at 501 on neck board. Yes also put game into test mode and adjusted the pots. Also the transistors Q600 to Q701 are all BJT NPN 80V 0.5A TO-92 according to the rebuild sheet. They are installed in the correct orientation.
 
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yes 704 is u07,703 is u57,604 is u07, 603 is u57.

Cool, they are correct. Substitutes can cause these problems

Not seeing the two caps you mention. Here are pics of the board

That's a P327, which is the newest revision of the board. C603 & C703 were removed from that layout (and it's recommended that they be removed, if you have one of the earlier P314 boards)

Cheers, the spots are there for the caps, but they were recommended to be removed, as Andrew said

However in some cases fitting them improves the squiggles. I don't know why
I found this recently when working on a troublesome board

I actually got a better picture on the screen with the caps fitted
See here for the 2 x caps (Shown in blue), if you want to give it a try
http://www.dsbelec.iinet.net.au/WG6100_Schematic-12Pin_&LV-Color.jpg

If you do, here they are
http://www.newark.com/epcos/b32521c3474k189/capacitor-polyester-film-0-47uf/dp/59T4273
 
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Great thanks I will give it a shot. Also I have another 327 deflection board I could throw in there. The only question I have about that is from the one 327 board to the 316 HV p900 there are 5 wires with two going up to the neck board. The other 327 board to a 329 HV board and p900 has 6 wires and 3 going to the neck board. Can you just switch the deflection boards? Thanks again
 

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Great thanks I will give it a shot. Also I have another 327 deflection board I could throw in there. The only question I have about that is from the one 327 board to the 316 HV p900 there are 5 wires with two going up to the neck board. The other 327 board to a 329 HV board and p900 has 6 wires and 3 going to the neck board. Can you just switch the deflection boards? Thanks again

Yes, all will work when switched
 
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