Wells-Gardner Vector Monitor 6100 Faq And Guide Version

Wells-Garnder Color Vector Monitor Guide Page 51 of 75 IMPROVING YOUR WELLS-GARDNER 6100 MONITOR  
 
Now that you have your monitor repaired and adjusted, we will discuss the variety of ways that 
exist to make your monitor (or rather, your deflection board) more robust and hopefully reduce 
or eliminate future failures. 
  
OFFICIAL ATARI DEFLECTION BOARD UPGRADE 
 
Here is some text from the Major Havoc conversion kit installation instructions (TM-268). It 
describes the Atari sanctioned upgrades and...

Wells-Garnder Color Vector Monitor Guide Page 52 of 75  
Figure 6 - IN754A and 1N756A Zener-Diode Connections 
 
                          Solder Here 
                              | 
        CATHODE +-+------+   \|/   +------+-+ CATHODE 
        --------+ |1N75#A+---------+1N75#A| +-------- 
                +-+------+ ANODES  +------+-+ 
 
                ----||---- 
 
 
6. Connect two type-1N756A Zener diodes together and solder as described in step 5.  
7. Examine the soldered side of the Deflection...

Wells-Garnder Color Vector Monitor Guide Page 53 of 75  
Table 3 - Display Versions 
 
Version 1 
Deflection PCB has two large, black, tubular capacitors, C804 and C805, 
installed below top center of PCB. Version 2 
Input Protection Circuit PCB is installed (piggyback) WITH A 1K Ohm, 
+/-5%, 1/4 W RESISTOR CONNECTED BETWEEN THE INPUT 
PROTECTION CIRCUIT PCB AND THE DEFLECTION PCB. Version 3 
Input Protection Circuit PCB is installed (piggyback) BUT DOES NOT 
HAVE A RESISTOR CONNECTED BETWEEN THE INPUT...

Wells-Garnder Color Vector Monitor Guide Page 54 of 75  
Version 2 Deflection Board 
 
Perform the following procedure for Version 2 of the Wells-Gardner 6100 display. 
 
1. Verify that the Preliminary Procedure has been performed. [see above] 
2. Use a 1/4-inch hex driver to secure the modified Deflection PCB to the display chassis. 
CAUTION!: Make certain that the harness from Q705 and Q706 is connected to P700 
and not P100. 
3. Connect the harnesses to the appropriate Deflection PCB connectors....

Wells-Garnder Color Vector Monitor Guide Page 55 of 75 THE INPUT PROTECTION CIRCUIT (IPC)  
 
This Modification is for P314 versions of the Deflection Board ONLY. The P327 and P339 
versions already have this circuit designed into the board. Here is the text from Atari CO-183-02 
(1st printing) that describes a circuit that was sold by Atari to help make the deflection board 
more robust. This input protection circuit is unavailable but very simple and easy to recreate 
from the schematics provided...

Wells-Garnder Color Vector Monitor Guide Page 56 of 75 110001-222 2.2K Ohm, +/- 5% 1/2 W Resistor (R10) 110001-472 4.7K Ohm, +/- 5% 1/2 W Resistor (R9) 110011-122 1.2K Ohm, +/- 1% 1/4 W Metal-Film Resistor (R2, 3) 110000-102 1K Ohm, +/- 5% 1/4 W Resistor (R12) A038088-01 B INPUT PROTECTION CIRCUIT PCB ASSEMBLY  
  
Schematic of the Input Protection Circuit PCB 
  
  

Wells-Garnder Color Vector Monitor Guide Page 57 of 75 COLOR X-Y DISPLAY 92-053 
INSTALLATION INSTRUCTIONS 
INPUT PROTECTION CIRCUIT PCB 
 
A038088-01 
 
 
1. Remove R600, R605, R700 and R706. 
2. Remove solder from all nine holes indicated in figure 13 [figure not included].  
3. Straighten pins of PCB so that they are perpendicular to the board [meaningless to you 
since you probably do not have the board].  
4. Match and insert the numbered holes in figure 13 with the numbered pins in figure 1...

Wells-Garnder Color Vector Monitor Guide Page 58 of 75 INPUT PROTECTION CIRCUIT PCB (continued) 
 
 
  
 
 
  

Wells-Garnder Color Vector Monitor Guide Page 59 of 75 Appendix A:  X-Y Monitor/Final Solution (sort of)  
 
WELLS GARDNER 
X-Y MONITOR/FINAL SOLUTION 
By Wayne McGuire, Brady Dist, Charlotte, NC 
[edited for content by Tom McClintock; additional notes by Zonn Moore] 
 
 
 
STANDARD DISCLAIMER: 
-------------------- 
REMEMBER, NO WARRANTEES, EXPRESS OR IMPLIED, ARE GIVEN.  USE THIS 
INFORMATION AT YOUR OWN RISK. I AM NOT RESPONSIBLE FOR ANY 
DAMAGES THAT MAY OCCUR TO YOUR PERSON OR PROPERTY....

Wells-Garnder Color Vector Monitor Guide Page 60 of 75 2 - POWER SUPPLY CIRCUIT 
 
The Low Voltage Power Supply is to be bypassed in this modification. The input stages of the 
deflection circuits used in this monitor are of the differential type and exhibit a high common 
mode rejection. This characteristic will filter out any noise or ripple of the power supply. 
 
A. Cut diodes D104 and D105 out of the power supply circuit (Schematic 2.1) 
 
 B. Cut the wires at P100 leaving about two inches at the...